Author Topic: Micsig Current Probe CP2100A/B Tests and Comparing  (Read 9373 times)

0 Members and 1 Guest are viewing this topic.

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Micsig Current Probe CP2100A/B Tests and Comparing
« on: May 10, 2020, 08:40:16 pm »
Hi,

https://www.eevblog.com/forum/testgear/350mhz-scope-2020/msg3056674/#msg3056674

I decided to order one, take it to work and hopefully can directly compare to other probes we use.
100Apk, 2.5Mhz Bandwith….sounds nice.

Price is 375€ (Batronix), well, what do we get from others:

Rigol RP1002C for 1886€

Testec TT-CC990 for 1178€

R&S RT-ZC02 for 898€

Siglent CP4070A for 842€

None of them offers the claimed 2.5 Mhz bandwith, some offer more than 100Apk, some less.
But all got one thing in common:
They were unlikely more expensive.
Therefore, the Micsig is very interesting.
The Micsig, like all other I´ve linked didn´t got a degaussing function, like I know from our tektronix probes but also from the lecroy ap011 probe.
At home I got the Owon CP05+ Probe, for appx 190€ incl. VAT.
Well....hm....Ah, forget it, this thing is crap.
Bandwith is claimed by 200khz, in real it would be something around 100khz, very noisy, you could use this thing from 1A up.
Before I got the Hantek CC-65 Probe....God... :palm:

For it´s price, I expect the Micsig will do a better job than my Owon or Hantek, that´s for sure.
But what about to compare it with "state of the art" probes?
What we got on work are Tektronix Probes and Lecroy Probe.
Chances are given, I can compare the Micsig with them, if Time allows it.
So I would do a comparison between CP2100B, CP05+, A6302, A6303, AP011.

My greatest "fear" would be the noise level.
Using tek probes or the ap011 from lecroy, you have a really low noiselevel - Could the CP2100B have it too ?

Let´s find it out... ;)
Missing degaussing function doesn´t concern me much, more important is the noise.

But first of all, I´ll send a offer request to batronix, it would be 3% off I guess.
But hey, taking all what you can get..

Nevertheless, the probe should arrive within the forthcoming week.

Any test suggestions ? Post it here.
DC current is self explaining, so no worries.
AC current I could measure up to 400hz.
Switching power current upt to say 10...20khz, depending on the DUT I could get on work.

To be continued..

« Last Edit: July 23, 2020, 10:07:35 pm by Martin72 »
 
The following users thanked this post: egonotto, thm_w, 2N3055, Elasia

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #1 on: May 11, 2020, 10:45:43 am »
Quote
But first of all, I´ll send a offer request to batronix, it would be 3% off I guess.
But hey, taking all what you can get..

No discount at all, but it doesn´t worry me.
When it´s good, then it´s got excellent bang for bucks value(see first post).
If it fails (noise..), I´ll return it and got my money back.
Should arrive in 2 days...
 
The following users thanked this post: egonotto

Online 2N3055

  • Super Contributor
  • ***
  • Posts: 2909
  • Country: hr
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #2 on: May 11, 2020, 11:23:55 am »
Quote
But first of all, I´ll send a offer request to batronix, it would be 3% off I guess.
But hey, taking all what you can get..

No discount at all, but it doesn´t worry me.
When it´s good, then it´s got excellent bang for bucks value(see first post).
If it fails (noise..), I´ll return it and got my money back.
Should arrive in 2 days...
Looking forward to see how it fares. Thank you for the effort.
For low level testing, few loops of wire and serial 50 Ohm on a signal generator could give interesting signal to see how it behaves down in noise land....
 
The following users thanked this post: Martin72

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #3 on: May 11, 2020, 11:28:11 am »
Good idea  :-+

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #4 on: May 11, 2020, 07:45:10 pm »
At last, I´ve found some specs for the lecroy ap011 which I want to compare with the micsig - from an old, downloadable catalogue.
(Would upload here because of some interesting articles inside, but it´s too big)
From the spec side, the ap011 looks ( of course ? ) better what accuracy concerns.
But I won´t know the original price for this… 8)
Got the Information from DHL, the probe should arrive on wednesday.
First I will do some tests here at home, like 2N3055 suggest one, together with the owon probe.
After this, I want to take the both to work and trying to find something interesting to measure and compare.



Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #5 on: May 12, 2020, 05:30:45 pm »
Quote
Got the Information from DHL, the probe should arrive on wednesday.

No….Today.  ;)

First impressions, good building quality, clamp got not a gap between when it´s closed ( like the owon did..), very solid cable, not bad.
Maybe tomorrow I start some measurings or at the forthcoming weekend.

 
The following users thanked this post: 2N3055

Offline TurboTom

  • Frequent Contributor
  • **
  • Posts: 860
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #6 on: May 12, 2020, 08:57:22 pm »
Have you got an option to evaluate the inductance of the probe? @100A, even a few nanohenries can be a lot. If too high, this may limit the usefulness of the bandwidth at the high current range.
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #7 on: May 12, 2020, 09:04:35 pm »
Hi, I´m afraid not.
But have a look at the specs.


Offline nctnico

  • Super Contributor
  • ***
  • Posts: 19935
  • Country: nl
    • NCT Developments
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #8 on: May 12, 2020, 09:10:05 pm »
At high currents you can compare a shunt resistor versus the probe. You just need a way to send a large current surge.
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #9 on: May 12, 2020, 09:19:19 pm »
Shunts we got a lot, we got also ZES LMG power analyzers with high precision current transformers or internal shunts.
For a surge current, I think I could use our selfbuild inductance meter.
It was designed to measure filter coils nearly to their normal operating current.
We calculating the inductance through the voltage-time area via pulses send from an µC to a IGBT.



Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #10 on: May 16, 2020, 01:18:22 pm »
First time playing around with it, some simple DC measures..
To get a higher current measure, 4mm banana cable was turning five times through the probe, power supply deliever 3A max.
Really nice: On the siglent you could choose between voltage or ampere in the channel menu, then the probe ratio will also changed from 1:10 etc. to V/A, makes it easy to find the right range.

Noiselevel….
Picture shows the noiselevel at 50mA/Div, for me it´s acceptable and a nice surprise.
Channel 4 shows the noiselevel from the owon probe.... :P
Current was measured by my calibrated brymen bm869s.
At 10A the micisg beeps a warning and the 10A button is flashing, reminding you to change to 100A, nice.
This was the first play around, more to come soon.. ;)
« Last Edit: May 16, 2020, 02:51:25 pm by Martin72 »
 
The following users thanked this post: egonotto, thm_w, 2N3055, maginnovision

Offline maginnovision

  • Super Contributor
  • ***
  • Posts: 1914
  • Country: us
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #11 on: May 16, 2020, 08:29:09 pm »
I was hoping to add some extra probes to the mix but my bnc adapters are VERY noisy. A short across them had more noise than the owon. I suspect the ground is making poor/no connection since they're all safety adapters so you I don't die.

Looks good so far. The owon looks like it'd work much better for a dmm.
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #12 on: May 16, 2020, 08:56:13 pm »
I think the same about the owon.
Nearly a year ago, I had a thread started about it, doing a schematic from it.
It got a very simple circuit design and the claimed 200khz bandwith couldn´t be right.
Nevertheless, the "Noisetest" was positive, so I will take the micsig to work instead of returning to batronix.
What I will do there is a comparison between lecroy ap011 and, maybe a little unfair, to the good old tek probe.
Next time ac currents will be measured, also I try to measure the bandwith/risetime.
If I get the chance, I´ll do some measures on "real" DUTs ( we are in the market of building power inverters up to 200KVA, 50/60/400hz, switching frequencies between 1.62....20khz)
Tomorrow I´ll try 2N3055´s suggestion.

Edit:

What else I want to try is using a power bank instead supplying the probe  from a USB port, to see if the (actually low) noise level could be further decreased with it.
« Last Edit: May 16, 2020, 10:13:57 pm by Martin72 »
 
The following users thanked this post: egonotto, 2N3055

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #13 on: May 17, 2020, 03:53:42 pm »
Did it..

Using the nice bnc-adaptors, I took the internal generator as source and the "load" was the internal 50ohm Input, then turning 10 wires through the clamp.
Below some measurings like risetime, several sinewave frequencies and....If I got bode plot on board, why not use it...So I´ve done it.
The testsetup especially with the 10 windings could not be perfect but at last, I´m surprised about the micsig in a very positive way.
Next step, comparing at work….
Martin

edit must measure the risetime again, wrong channel... :P

risetime added
« Last Edit: May 17, 2020, 04:58:09 pm by Martin72 »
 
The following users thanked this post: Kean, 2N3055, Algasman

Online 2N3055

  • Super Contributor
  • ***
  • Posts: 2909
  • Country: hr
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #14 on: May 17, 2020, 05:29:27 pm »
That is decent small signal response, and noise is quite low..  Nice work Martin! Looking forward to next episode!
 
The following users thanked this post: Martin72

Offline voltsandjolts

  • Supporter
  • ****
  • Posts: 977
  • Country: gb
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #15 on: May 17, 2020, 06:25:07 pm »
Micsig has been a pleasant surprise for me too.
I've bought two of their tablet scopes, best portable scope for the money IMHO.
Will be interested in your test results.
 
The following users thanked this post: Martin72

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #16 on: May 17, 2020, 07:18:47 pm »
Next week is a short one due public holiday on thursday, so I have three days to "steal" a little bit time and some gear..
Goals are the mentioned comparison between tektronix 50Mhz clamp and the lecroy what accuracy, risetime/bandwith concerns.
Also I want to measure "real" high current and not turning windings through the clamp.
Well, we´ll see what happen.


Offline tautech

  • Super Contributor
  • ***
  • Posts: 19375
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #17 on: May 18, 2020, 03:56:05 am »
Martin, in this screenshot there appears some significant current probe propagation delay:



Can you use the channel 1 deskew to see how much delay the MICSIG current probe inserts into the measurements ?
Does it meet the manufacturers propagation delay spec ?
Avid Rabid Hobbyist
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #18 on: May 18, 2020, 04:49:00 am »
Hi,

Will do it in the next days.

Martin

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #19 on: May 18, 2020, 05:12:47 pm »
Comparing three probes noiselevel at 50mA/div. on the hdo6043a, Tektronix, Lecroy and Micsig.
"Of course" the Micsig is noisier, but not much - Excellent.
@tautech: Probe is at work, will looking for, if the lecroy got the deskew function too.
 
The following users thanked this post: egonotto, 2N3055

Offline tautech

  • Super Contributor
  • ***
  • Posts: 19375
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #20 on: May 18, 2020, 07:15:58 pm »
@tautech: Probe is at work, will looking for, if the lecroy got the deskew function too.
All half decent scopes have channel deskew.  :P

SDS5054X SDS5104X with 3 current probes....ch1 probe broken  :(
Ch2 menu showing deskew WRT the ch4 voltage probe.

Avid Rabid Hobbyist
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #21 on: May 18, 2020, 07:29:48 pm »
Quote
All half decent scopes have channel deskew.

Never used this, so I must look at it.  ;)

Online 2N3055

  • Super Contributor
  • ***
  • Posts: 2909
  • Country: hr
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #22 on: May 18, 2020, 09:27:42 pm »
Quote
All half decent scopes have channel deskew.

Never used this, so I must look at it.  ;)
It's in Channel setup, in preprocessing, on the right..
 
The following users thanked this post: Martin72

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #23 on: May 20, 2020, 08:20:31 pm »
Next week is a short one due public holiday on thursday, so I have three days to "steal" a little bit time and some gear..
Goals are the mentioned comparison between tektronix 50Mhz clamp and the lecroy what accuracy, risetime/bandwith concerns.
Also I want to measure "real" high current and not turning windings through the clamp.
Well, we´ll see what happen.

Unfortunately, I got no time at work this week - Except this one..
"Real" DC current measure up 100A.
The tek probe was in use, so I compare it with the lecroy ap011.
"reference" was a shunt, voltage measured by fluke 87V in hires mode, scope was a lecroy hdo6034a.
Source was a 100adc supply in constant current mode.
The cp2100b was every time in it´s tolerance values, also the ap011 - Remarkable: The claimed 15% from 40A up wasn´t reached at any time, worsest deviation was 4.22% at 100A.
Nice..
Hopefully, AC measure and switching current measure I could make next week on work.
I´ve took it back to home, making the measure tautech asked for it.

« Last Edit: May 20, 2020, 08:26:42 pm by Martin72 »
 
The following users thanked this post: thm_w, 2N3055

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #24 on: May 24, 2020, 03:04:02 pm »
Can you use the channel 1 deskew to see how much delay the MICSIG current probe inserts into the measurements ?
Does it meet the manufacturers propagation delay spec ?

Hi,

Specs were <150ns (10A), <200ns (100A).

Below 2 pics without deskew and with max deskew on ch1.

 
The following users thanked this post: 2N3055

Offline tautech

  • Super Contributor
  • ***
  • Posts: 19375
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #25 on: May 24, 2020, 06:13:14 pm »
Here from Martin's screenshot we see some small offset with the MICSIG current probe WRT the voltage probe. Negative pulse inaccuracy ?  :-//



Also Deskew is not set correctly as the rising edge of the current should match the voltage rising edge better.
If both channels are set on 0V as these are and both similar amplitude the trigger needs be set to 50% and at that point the deskew adjusted so both signals cross through the trigger point at exactly the same instant. ps accuracy is possible.  ;)

For most measurement needs channel deskew does not matter very much but for accurates results from Power analysis it does. Practice makes perfect.  ;)

Oh and another trick when one trace is less noisy than the other.....select it so it overlays the noisy trace and they both become visible.  ;)
Avid Rabid Hobbyist
 
The following users thanked this post: egonotto

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #26 on: May 24, 2020, 07:07:13 pm »
Quote
Also Deskew is not set correctly

As I said, I never used this before so any "hints" like yours are welcome.  ;)

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #27 on: May 24, 2020, 07:25:47 pm »
Quote
Negative pulse inaccuracy ?

No, forget to press "zero" before...   :P

[attachimg=1]

Online 2N3055

  • Super Contributor
  • ***
  • Posts: 2909
  • Country: hr
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #28 on: May 24, 2020, 07:34:44 pm »
Quote
Also Deskew is not set correctly

As I said, I never used this before so any "hints" like yours are welcome.  ;)

Well, what is maximum deskew  time on SDS2000+ ? 
On KS MSOX3000T it is ± 100ns...  So on KS MSOX3000T  you have to deskew current probe channel for max 100 ns , and then deskew rest of the channels in opposite direction (but all for same value to be in phase) to achieve delta of 170ns..

 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #29 on: May 24, 2020, 07:40:37 pm »
Maximum is +/- 100ns.

Quote
So on KS MSOX3000T  you have to deskew current probe channel for max 100 ns , and then deskew rest of the channels in opposite direction (but all for same value to be in phase)

As I did the measurements, I also did one where both channels were deskewed to the max 100ns:

[attachimg=1]

Offline tautech

  • Super Contributor
  • ***
  • Posts: 19375
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #30 on: May 24, 2020, 08:50:57 pm »
Quote
Negative pulse inaccuracy ?

No, forget to press "zero" before...   :P

[attachimg=1]
OK on this one ch3 is the current probe and trigger so now ch4 needs deskew adjusted to have it also at the 0s, 0V trigger crossing position. For really fine adjustments increase the timebase as required.  ;)
Avid Rabid Hobbyist
 

Offline tautech

  • Super Contributor
  • ***
  • Posts: 19375
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #31 on: May 24, 2020, 11:53:00 pm »
As some example of propagation delays and the need for channel deskew to align edges for precise measurements here is 100 KHz squarewave connected to ch4 via BNC and ch3 via its 10x probe and a Tek P6021 current probe measuring the squarewave current into a 50 Ohm load.
Please disregard ringing from this setup as it's not relevant to the deskew discussion.
SDS5104X, source SDG6022X




Triggering is on ch4 @ 50% and all channels are aligned to some graticule and amplitudes adjusted so that any propagation delays are plain so deskew can be performed on channels 2 and 3 to align the rising edge 50% point and the required amount is shown in deskew and cursor measurements.



Cursors left at their settings but deskew adjustments for channels 2 and 3 entered so 50% points all cross 0V close together in time.

« Last Edit: May 24, 2020, 11:54:38 pm by tautech »
Avid Rabid Hobbyist
 
The following users thanked this post: Sighound36

Offline maginnovision

  • Super Contributor
  • ***
  • Posts: 1914
  • Country: us
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #32 on: May 25, 2020, 01:00:11 am »
Does the 5k also have the 100ns limit for deskew?
 

Offline tautech

  • Super Contributor
  • ***
  • Posts: 19375
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #33 on: May 25, 2020, 07:19:03 am »
Does the 5k also have the 100ns limit for deskew?
+100ns
So we'd select neither our fastest or slowest propagation channel but a midrange channel to trigger on and set deskew to line them all in time.
The difference between these 2 channels is ~7ns but each channel has been set to max and min deskew as an example.

Avid Rabid Hobbyist
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #34 on: May 25, 2020, 07:11:31 pm »
Today I take it to work for further testing, on the desk the lecroy hdo6034a.
And yes it got deskew also (  ;) ), the adjustable range is +/- 990µs - WTF....

Offline maginnovision

  • Super Contributor
  • ***
  • Posts: 1914
  • Country: us
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #35 on: May 25, 2020, 07:41:39 pm »
That's what I call deskew. I was a little disappointed with the ±500ns but if ±100ns is standard then I guess I'm happy with it.
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #36 on: May 25, 2020, 07:48:25 pm »
I wish I had 500ns...
Although I think, 100ns are "enough" for compensating e.g different cable-lenghts.
Fortunately, I got a Power Inverter for testing for a few days.
It´s understood I want to test something with the Micsig, DC-Currents I´ve already done, so I can test with the Inverter AC-Currents up to 100A/400hz.
Further pwm power current with a frequency of 10khz.
I´m looking forward the micsig will do a good job on this also.

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #37 on: June 11, 2020, 08:09:29 pm »
Update:

I send the micsig back to batronix for an exchange, reason:
Specsheet stated a delay under 150ns in 10A range, mine got an averaging delay of 170ns - Told them, they did a measure with another one and it was 125ns, so they offer me to exchange mine.
So AC current tests and my final verdict about will be delayed until I got the other one.  ;)
 
The following users thanked this post: Kean, 2N3055

Offline maginnovision

  • Super Contributor
  • ***
  • Posts: 1914
  • Country: us
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #38 on: June 11, 2020, 10:09:05 pm »
Let's hope the next one really is in spec! So perhaps they won't always meet all specs which is a bit disappointing.
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #39 on: June 13, 2020, 06:38:00 pm »
Well...
If they hadn´t offered me the exchange, it wouldn´t be such a big showstopper for me.
The much more expensive examples I´ve linked in the first post do not even give this value in their specs - Maybe for a good reason... :-X ;)

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #40 on: June 19, 2020, 07:47:22 pm »
Quote
The much more expensive examples I´ve linked in the first post do not even give this value in their specs - Maybe for a good reason..

The AP011 from lecroy for example...measure it today on work, appx 338ns delay.
So I don´t bother about 170ns, especially since you will use deskewing when taking power measurements.
New probe doesn´t have arrive yet, as batronix got no more on stock and offer me to return my former one to me plus the money, until they have new (and checked before) in stock.
I´ve agreed to it, as I want to make further measures asap to close the "case", giving a final verdict.  ;)

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #41 on: July 03, 2020, 08:09:20 pm »
Little update:
New  (selected) probe should arrive in the next week.
"Unfortunately", I have three weeks' vacation then, couldn´t do AC tests... ;)
What I likely want to do is a comparison to more expensive models, using the same measurement principle like the micsig.
Are they better, equal or even worser than the micsig...
Ask batronix for loan me for example this one for comparing:

https://www.batronix.com/versand/messtechnik/tastkoepfe/Testec-TT-CC-770.html

Or this one:

https://www.batronix.com/versand/messtechnik/tastkoepfe/Rigol-RP1002C.html

They answered, directly no, but I could "buy" it and send it return after a week....Hm-hm..

Comparing with the owon cp-05+ I got here, was no compare, the micsig are ways better in every case.



Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #42 on: July 14, 2020, 10:29:40 pm »
Update, the second.

Still got no new probe as they aren´t arrived to batronix.
Now I got a problem, in ebay there was an offer I could not longer withstand it and asked for the last price.
A used combo of tektronix A6302 and mainframe/amplifier.
If I could get it to nearly the price of the micsig, I´ll buy this, sorry.
And the last verdict will be therefore my final:

- Surprisingly low noise
- Accuracy always in the specs
- For it´s price, I think you´ll never get a better one, even if they would cost double or more ( because of the measuring principle - only currentcompensating models should be better in accuracy, these ones you won´t find under 3k€)

If I don´t get the tek, I´ll continue testing.

Martin
« Last Edit: July 14, 2020, 10:32:13 pm by Martin72 »
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #43 on: July 22, 2020, 12:15:14 pm »
Update, the third... ;)

Couldn´t get the tek probe, therefore looking further to get the micsig back.
It´s still out of stock - But the cp2100A with "only" 800khz bandwith are in stock and therefore I´ve order one now.
Let´s see if this perform as well as the B version - If yes, it would be the best bang for bucks, as it only costs 180€ (excl. VAT).... 8)
Should arrive inbetween this week.
Martin

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #44 on: July 22, 2020, 02:46:12 pm »
Update, the third... ;)

Couldn´t get the tek probe, therefore looking further to get the micsig back.
It´s still out of stock - But the cp2100A with "only" 800khz bandwith are in stock and therefore I´ve order one now.
Let´s see if this perform as well as the B version - If yes, it would be the best bang for bucks, as it only costs 180€ (excl. VAT).... 8)
Should arrive inbetween this week.
Martin

Always in stock if you are willing to wait on the boat lol.. lowest i've seen for the B is $360 usd or so

I'd think they would be very similar just the 3db point is 0.8 MHz vs 2.5 MHz

Saw a recent review here of the B as well


 
The following users thanked this post: apblog

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #45 on: July 22, 2020, 02:58:02 pm »
Wtf, Metalica ?!  :D

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #46 on: July 22, 2020, 08:37:13 pm »
Nice little review..
The cp2100A does arrive tomorrow  :o
Batronix are fast as lightening.
And as it was on it´s way, another guy from them mailed me, ah yes, today we got the cp2100B on stock...Thank you. :P
But first I want test the A model, if I don´t find any disadvantages against the B except the bandwith, I think it could stay here.

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #47 on: July 23, 2020, 11:10:18 am »
Tadaa, it´s arrived... 8)

Looks, smells, feels the same, the clamp itself was 100% the same as on the "B" version.
Makes me curious to know what´s inside the box.... ;)
And at last I could test switching frequency - I got my deskew fixture....
Tests will follow.

Martin
 
The following users thanked this post: 2N3055

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #48 on: July 23, 2020, 12:22:15 pm »
Quote
And at last I could test switching frequency - I got my deskew fixture....

[attachimg=1]

[attachimg=2]

 :( ::) :P

Small loop I could try to dremel a bit, large loop no chance I guess.

Online 2N3055

  • Super Contributor
  • ***
  • Posts: 2909
  • Country: hr
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #49 on: July 23, 2020, 12:36:55 pm »
Quote
And at last I could test switching frequency - I got my deskew fixture....

[attachimg=1]

[attachimg=2]

 :( ::) :P

Small loop I could try to dremel a bit, large loop no chance I guess.

OMG that sucks... |O

I guess we should press on with a design that is more universal...
If only my day had 48 hours... :'(
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #50 on: July 23, 2020, 12:57:11 pm »
Got got my thoughts on it too, taking the large loop circuit as the basic for it, instead of the loops on the pcb taking a 2-pole connector like steve suggested, fixed frequency but gate-resistor can be switchable .


Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #51 on: July 23, 2020, 01:03:59 pm »
You can dremmel the large loop as well but you have to go right to the edge of the copper

I'll eventually cnc mill mine down for use with my micsig on the large loop because its so close
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #52 on: July 23, 2020, 03:25:24 pm »
Done it and it works.
Needs some fine polishing, but this could wait... 8)
 
The following users thanked this post: 2N3055, Sighound36

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #53 on: July 23, 2020, 08:31:49 pm »
Micsig on the deskew fixture, 22Khz, 147mA, 1A

Not bad... ( choose averaging in the 50mA range)

Will do the same "home tests" like with the B version, finally a high current test next week when I´m back to work.
But hey, in my opinion, besides the lower bandwith, it´s equal to the c2100b and therefore a real good deal.
To be continued
 
The following users thanked this post: 2N3055

Offline tautech

  • Super Contributor
  • ***
  • Posts: 19375
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Micsig Current Probe CP2100B Tests and Comparing
« Reply #54 on: July 23, 2020, 09:23:21 pm »
Quote
And at last I could test switching frequency - I got my deskew fixture....

[attachimg=1]

[attachimg=2]

 :( ::) :P

Small loop I could try to dremel a bit, large loop no chance I guess.

OMG that sucks... |O

I guess we should press on with a design that is more universal...
If only my day had 48 hours... :'(
Fix for the single 147mA loop as below:
Avid Rabid Hobbyist
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #55 on: July 28, 2020, 11:13:02 pm »
Got the CP2100A at work, same results as the B version.
So if you could be happy with 800Khz bandwith, take this one and save lots of money.
Comparing to the rest who will "give" us 800Khz or less, the price is outstanding.
But I send it back, because the "B"s are on stock again and I want the 2.5Mhz.... ;)

Final Verdict...

Pros:

- Always in their specs what accuracy concerns
- Really good building quality, wants me to make a teardown
- Small clamp
- Outstanding bandwith for the price, 800Khz for 200, 2.5Mhz for 375 Bucks - You won´t find this anywhere.
- Good, not best, but really good low noise level for it´s range
- Offset could be manually compensating (up/down additional to the auto-zero function)

Cons:

- Small clamp, but a little "thick" for lower current measure (probably you must do some extensions to put the clamp onto it for measuring)
- Needs external power supply
- Accuracy always in the specs but it´s somewhere around 4..5%, others could do it better (but cost much more)
- No degaussing function ( but this you will find only on models starting from 3000 bucks )

This or nothing...
Either you spend 200/370 Bucks for them or you save your money until you can afford the hioki things under several brands, starting with 3K bucks and upwards.
You shouldn´t expect the less noise and precision like you perhaps know from tek probes.
It is usable with currents starting from 50mA/div.
If this fits your needs, buy it.
You musn´t spend more money.
Really good stuff !
 
The following users thanked this post: egonotto, Kean, 2N3055

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #56 on: July 30, 2020, 08:02:50 pm »
Batronix...Sometimes I think, they´re right aorund the next corner in my neighbourhood... 8)

[attachimg=1]

Luckywise, I must do some power tests in the next two weeks at work. I´ll "smuggle" the probe and take some "real" measurings in ac and dc, full current (instead of turning loops).
Also, the question pops up of how it handles high dc-current, if it gets magnetized after this - This I´ll test also.
For the forthcoming weekend I´ll test it on my fixture, expecting "sharper" waveforms as the cp2100a.
And still I´m very curious about the inside...but couldn´t find a point to open it without getting schratches - No screws in sight.

 
The following users thanked this post: Kean, 2N3055

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #57 on: July 31, 2020, 11:35:07 am »
Batronix...Sometimes I think, they´re right aorund the next corner in my neighbourhood... 8)

[attachimg=1]

Luckywise, I must do some power tests in the next two weeks at work. I´ll "smuggle" the probe and take some "real" measurings in ac and dc, full current (instead of turning loops).
Also, the question pops up of how it handles high dc-current, if it gets magnetized after this - This I´ll test also.
For the forthcoming weekend I´ll test it on my fixture, expecting "sharper" waveforms as the cp2100a.
And still I´m very curious about the inside...but couldn´t find a point to open it without getting schratches - No screws in sight.

I'll look at mine later and see about poping it, i also just got a new microscope with a 4k camera so maybe i'll post some high res pics
 
The following users thanked this post: 2N3055, Martin72

Offline dcac

  • Regular Contributor
  • *
  • Posts: 222
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #58 on: July 31, 2020, 12:13:43 pm »
I would certainly be interested in seeing whats inside.  :P

 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #59 on: August 01, 2020, 02:30:00 am »
After removing the front facing sticker with my heat gun.. i made it inside, rather impressed with the build quality

sadly most of the goods between the current clamp and the cable going to the scope are hidden inside metal cans...   i will attack it further tomorrow and see about poping them off
 
The following users thanked this post: dcac, Martin72

Offline dcac

  • Regular Contributor
  • *
  • Posts: 222
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #60 on: August 01, 2020, 11:30:37 am »
Yeah I notice the good build quality on their Differential probes too from looking at teardown videos. It's an annoying habit placing the screws under the label though - but better than welding it shut I suppose.   

Can you determine how many leads goes to the 'clamp head' - there might be an amplifier in that too.

But please don't take anything apart that's not easily coming back together again on my part.

 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #61 on: August 01, 2020, 11:25:06 pm »
Some pics.. not 4K, forgot to get wide view lenses for the camera lol, maybe i'll add some monday

Edit: dumb forum picture bug strikes again
« Last Edit: August 02, 2020, 01:08:21 pm by Elasia »
 
The following users thanked this post: Kean, dcac, Martin72

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #62 on: August 01, 2020, 11:27:56 pm »
nt
 
The following users thanked this post: Martin72

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #63 on: August 01, 2020, 11:45:43 pm »
When I think about the owon crap, which costs only  40..50 bucks less than the 2100A....Boy what a difference.


Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #64 on: August 02, 2020, 12:43:41 am »
When I think about the owon crap, which costs only  40..50 bucks less than the 2100A....Boy what a difference.

No kidding right?  The clamp im too lazy to take apart.. ended up needing to use it so put it all back together lol

Just look how well curved that line is... not one bit of ringing, nothing to exciting just a 200Hz pwm for a coil
 

Offline dcac

  • Regular Contributor
  • *
  • Posts: 222
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #65 on: August 02, 2020, 12:28:50 pm »
This is obviously a completely different class than my toyish CC-65. It might be time to upgrade.
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #66 on: August 02, 2020, 05:49:44 pm »
Quote
Some pics..

It bothers me that I´ve send the a version back, would be interesting to know the difference ( same board), perhaps changing a few components will turn the a to the b.. ;)

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #67 on: August 03, 2020, 03:02:35 am »
Quote
Some pics..

It bothers me that I´ve send the a version back, would be interesting to know the difference ( same board), perhaps changing a few components will turn the a to the b.. ;)

Oh you already sent it back? Yeah i was thinking that it might just be a few chip components.. all I got are Bs so no help there
 

Offline dcac

  • Regular Contributor
  • *
  • Posts: 222
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #68 on: August 03, 2020, 06:33:07 pm »
Quote
Some pics..

It bothers me that I´ve send the a version back, would be interesting to know the difference ( same board), perhaps changing a few components will turn the a to the b.. ;)

On this PCB it says "CP2100A/B_DIG_V2X" so chances are good it's same board - but likely there's also circuitry in the clamp and that might be different.

Also couldn't find a single trimmer - so is the calibration done digitally(?)

 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #69 on: August 03, 2020, 06:40:58 pm »
Quote
Some pics..

It bothers me that I´ve send the a version back, would be interesting to know the difference ( same board), perhaps changing a few components will turn the a to the b.. ;)

On this PCB it says "CP2100A/B_DIG_V2X" so chances are good it's same board - but likely there's also circuitry in the clamp and that might be different.

Also couldn't find a single trimmer - so is the calibration done digitally(?)

Thats some kinda micro on board so i would say so yeah

I should have got a pic of the micro.. forget what it was other than the mfg uses a bee symbol
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #70 on: August 03, 2020, 07:12:22 pm »
Quote
Also couldn't find a single trimmer - so is the calibration done digitally(?)

Quite interesting - Ask them for a service manual, of course, they gotn´t one.. ;)

Offline dcac

  • Regular Contributor
  • *
  • Posts: 222
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #71 on: August 04, 2020, 09:03:30 am »
Quote
Also couldn't find a single trimmer - so is the calibration done digitally(?)

Quite interesting - Ask them for a service manual, of course, they gotn´t one.. ;)

oh, if it was easy getting service manuals we wouldn’t need all the reverse engineering fun.  ;)
 

Offline Sighound36

  • Frequent Contributor
  • **
  • Posts: 302
  • Country: gb
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #72 on: August 04, 2020, 09:33:38 am »
Some good work here chaps  8)

Can I make a suggestion here when you guys do any form of RE. Why not four of five of you club together and split the cost of the purchase, that way you have a two fold benefit. You do not pay the full price (after discount) plus you can do as you like with the equipment. Just a thought  ^-^

I would be happy to contribute if you were to go down this route.
Seeking quality measurement equipment at realistic cost with proper service backup. If you pay peanuts you employ monkeys.
 
The following users thanked this post: Elasia

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #73 on: August 04, 2020, 11:04:23 am »
Not a bad idea really.. I think Martin and I are exceptions to that in that we mostly RE our daily drivers we use for work.. I always want to know whats inside of whatever I'm using

I'd entertain RE teardowns like that if it wasnt for the zoo of projects I already got... if I add more my wife would murder me haha
 

Offline bicycleguy

  • Regular Contributor
  • *
  • Posts: 149
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #74 on: August 04, 2020, 03:51:43 pm »
When I think about the owon crap, which costs only  40..50 bucks less than the 2100A....Boy what a difference.

No kidding right?  The clamp im too lazy to take apart.. ended up needing to use it so put it all back together lol

Just look how well curved that line is... not one bit of ringing, nothing to exciting just a 200Hz pwm for a coil

Trying to justify one of these for myself so trying to understand.  A few questions:
1.  Wouldn't you need to look at a much higher scope frequency to see any ringing?
2.  On a typical solar inverter or SMPS would there typically be any place that large a probe would fit that would be worth while to see ringing?
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #75 on: August 04, 2020, 04:29:41 pm »

Trying to justify one of these for myself so trying to understand.  A few questions:
1.  Wouldn't you need to look at a much higher scope frequency to see any ringing?
2.  On a typical solar inverter or SMPS would there typically be any place that large a probe would fit that would be worth while to see ringing?

That specifically was a dig at the CP-65 and clones of it.. yeah.. it rings at that low of a frequency x_x

I'd point you to watch this guy's review of it.. and yeah he kinda looks like he came from metallica lol

 

Offline bicycleguy

  • Regular Contributor
  • *
  • Posts: 149
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #76 on: August 13, 2020, 05:31:41 pm »
Is there going to be a CP2100A vs CP2100B comparison?
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #77 on: August 13, 2020, 06:50:32 pm »
When somebody else will buy a cp2100a, why not.
To be honest, I´ve played with the thoughts, buying the 2100a again and compare it to the b version.
Or trying to tear it down, especially the clamp, because there must be "more electronics" in it.
You can hear a relay switching, also the ammount of the leads coming from the clamp part are too less - Something must happen in the clamp part before...
Boy, imagine, this thing costs only 200/350 bucks...

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #78 on: August 13, 2020, 11:29:57 pm »
When somebody else will buy a cp2100a, why not.
To be honest, I´ve played with the thoughts, buying the 2100a again and compare it to the b version.
Or trying to tear it down, especially the clamp, because there must be "more electronics" in it.
You can hear a relay switching, also the ammount of the leads coming from the clamp part are too less - Something must happen in the clamp part before...
Boy, imagine, this thing costs only 200/350 bucks...

Yeah there are more inside the clamp, notice the clamp gets both positive and negative power supplied to it... all those little wires are on top of the main signal wire that is shielded itself

It's more of an active probe head unit... pretty amazing for the cost, they should come out with active scope probes too if they can make them anything like their diff and current probes
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #79 on: August 25, 2020, 09:39:16 am »
Heads up, I'm going to sell the 2MHz unit and I just got stock ;D
Need to do a video of course, but will be offering a deal to my newsletter subscribers and Patrons and forum supporters shortly.
Should be able to beat other prices but that probably depends on your country.
Price will rise once my stock is gone, as MicSig gave me a deal on the batch of units.

 
The following users thanked this post: Kean, 2N3055, Serpent10i

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #80 on: August 25, 2020, 09:40:14 am »
Yeah there are more inside the clamp, notice the clamp gets both positive and negative power supplied to it... all those little wires are on top of the main signal wire that is shielded itself
It's more of an active probe head unit... pretty amazing for the cost, they should come out with active scope probes too if they can make them anything like their diff and current probes

Yes, I will be able to post a photo inside the clamp head tomorrow, it is indeed an active head design.
 
The following users thanked this post: Martin72

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #81 on: August 25, 2020, 10:36:44 am »
Heads up, I'm going to sell the 2MHz unit and I just got stock ;D
Need to do a video of course, but will be offering a deal to my newsletter subscribers and Patrons and forum supporters shortly.
Should be able to beat other prices but that probably depends on your country.
Price will rise once my stock is gone, as MicSig gave me a deal on the batch of units.

Wow nice :)

Branded?  I could always use another, i'll take one off your hands

Cant wait to see inside that probe head
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #82 on: August 25, 2020, 12:01:38 pm »
Branded?

No, not yet, it was a very significant cost to do that. Possibly in the future.
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #83 on: August 25, 2020, 09:11:47 pm »
Yes, I will be able to post a photo inside the clamp head tomorrow, it is indeed an active head design.

Wtf, how could they do it for this price....
Remember, I´ve bought an owon cp-05+ clamp for 170 bucks...
It looses in every case and cost only 30 less.

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #84 on: August 25, 2020, 10:35:35 pm »
Full album here:
https://www.flickr.com/photos/eevblog/albums/72157715635511053

Uses an AD8421 inamp on the front end with dual hall effect sensors and relay switching.

Micsig CP2100B Current Probe Teardown by Dave Jones, on Flickr
« Last Edit: August 25, 2020, 10:47:11 pm by EEVblog »
 
The following users thanked this post: Kean, Martin72

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #85 on: August 25, 2020, 10:55:21 pm »
Yes, I will be able to post a photo inside the clamp head tomorrow, it is indeed an active head design.
Wtf, how could they do it for this price....
Remember, I´ve bought an owon cp-05+ clamp for 170 bucks...
It looses in every case and cost only 30 less.

Yikes. No contest!
I can offer the 2MHz CP2100B for US$365, MicSig sell it for US$499 on Aliexpress and US$599 on Amazon. Got them in stock now. Going to add them to my store today.
Not sure if I'll bother to carry the CP2100A model?
BTW, this design was supposed to be 2.5MHz, and I have an early unit labels that. But they couldn't maintain this spec in production so dropped it to 2MHz.
« Last Edit: August 25, 2020, 10:58:27 pm by EEVblog »
 

Offline Kean

  • Supporter
  • ****
  • Posts: 1086
  • Country: au
  • Embedded systems & IT consultant
    • Kean Electronics
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #86 on: August 26, 2020, 12:54:11 am »
I can offer the 2MHz CP2100B for US$365, MicSig sell it for US$499 on Aliexpress and US$599 on Amazon. Got them in stock now. Going to add them to my store today.

My credit card is ready when you are!
I was about to buy one the other day on the AliExpress "Micsig official store", but the price was just a little too painful so I put it off again.
 

Offline maginnovision

  • Super Contributor
  • ***
  • Posts: 1914
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #87 on: August 26, 2020, 01:00:34 am »
Nice! Waiting on a link now.
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #88 on: August 26, 2020, 01:01:38 am »
Yes, I will be able to post a photo inside the clamp head tomorrow, it is indeed an active head design.
Wtf, how could they do it for this price....
Remember, I´ve bought an owon cp-05+ clamp for 170 bucks...
It looses in every case and cost only 30 less.

Yikes. No contest!
I can offer the 2MHz CP2100B for US$365, MicSig sell it for US$499 on Aliexpress and US$599 on Amazon. Got them in stock now. Going to add them to my store today.
Not sure if I'll bother to carry the CP2100A model?
BTW, this design was supposed to be 2.5MHz, and I have an early unit labels that. But they couldn't maintain this spec in production so dropped it to 2MHz.

I was wondering what the deal was with that 2 vs 2.5 floating around

Mine are all labeled as 2.5 on the control box, did they change that to 2? Or is it they call all of them actually to be 2 MHz and ignore the label?  What are your units labeled as?

Cool shots at the probe head, was wondering if they had any tuning parts inside it and how well the sensing halls were shielded

Interesting price point too, thats about the same as the best deal i saw on them.  Picked one off the bay for 360 direct from shenzhen maybe a month ago.. was expecting a boat but the guy dhl expressed it which was pretty cool, he has sense raised his price to 400
 

Offline Kean

  • Supporter
  • ****
  • Posts: 1086
  • Country: au
  • Embedded systems & IT consultant
    • Kean Electronics
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #89 on: August 26, 2020, 01:04:01 am »
There are some on AliExpress at a much lower price than the official store, but I just wasn't willing to risk getting a factory second.
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #90 on: August 26, 2020, 01:11:06 am »
 
The following users thanked this post: Kean

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #91 on: August 26, 2020, 01:12:17 am »
I was wondering what the deal was with that 2 vs 2.5 floating around
Mine are all labeled as 2.5 on the control box, did they change that to 2? Or is it they call all of them actually to be 2 MHz and ignore the label?  What are your units labeled as?

My stock units are labeled 2MHz.
 

Offline maginnovision

  • Super Contributor
  • ***
  • Posts: 1914
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #92 on: August 26, 2020, 01:13:28 am »
Ordered.
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #93 on: August 26, 2020, 01:14:18 am »
There are some on AliExpress at a much lower price than the official store, but I just wasn't willing to risk getting a factory second.

I can beat those Aliexpress prices, at least for the first batch of units.
 

Offline Kean

  • Supporter
  • ****
  • Posts: 1086
  • Country: au
  • Embedded systems & IT consultant
    • Kean Electronics
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #94 on: August 26, 2020, 01:14:45 am »
Ordered.
ditto - I'm in Australia so my Internet sucks!
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #95 on: August 26, 2020, 01:34:22 am »
FYI, have just sent the link to my newsletter list of 10,000 people and Patreon, so the 50 units might not last long.
 
The following users thanked this post: Kean

Offline technogeeky

  • Frequent Contributor
  • **
  • Posts: 549
  • Country: us
  • Older New "New Player" Player Playa'
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #96 on: August 26, 2020, 01:36:02 am »
I got one, declined card, paid with paypal, then it said it didn't go through, then finally it said the order is processing so I can't submit it.

Hope for the best!
 

Offline maginnovision

  • Super Contributor
  • ***
  • Posts: 1914
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #97 on: August 26, 2020, 01:41:34 am »
FYI, have just sent the link to my newsletter list of 10,000 people and Patreon, so the 50 units might not last long.

I don't think I've ever received the newsletter despite subscribing.
 

Offline TheDefpom

  • Frequent Contributor
  • **
  • Posts: 344
  • Country: nz
  • YouTuber Nerd
    • The Defpom's Channel
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #98 on: August 26, 2020, 01:43:44 am »
FYI, have just sent the link to my newsletter list of 10,000 people and Patreon, so the 50 units might not last long.

I got the newsletter email.... just not the money to get one :-(
Cheers Scott
Check out my Electronics & Repair Videos at https://www.youtube.com/TheDefpom
My NEW Mailbag Videos Channel: http://defs.link/?u=b5daff
My NEW Review Videos Channel: http://defs.link/?u=72b0c6
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #99 on: August 26, 2020, 01:45:25 am »
Ordered, i'll be interested to compare it to my 2.5 ones
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #100 on: August 26, 2020, 01:46:02 am »
Down to 45 units already
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #101 on: August 26, 2020, 02:19:43 am »
I got one, declined card, paid with paypal, then it said it didn't go through, then finally it said the order is processing so I can't submit it.
Hope for the best!

I have a new Stripe credit card option, a couple of cards have failed since I started it, no idea why, that's a Stripe thing.
There are no pending orders, so yours must be in there.
 

Offline Cubdriver

  • Supporter
  • ****
  • Posts: 2953
  • Country: us
  • Nixie addict
    • Photos of electronic gear
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #102 on: August 26, 2020, 04:09:33 am »
38 left.   :-+

-Pat
If it jams, force it.  If it breaks, you needed a new one anyway...
 

Offline kahuna0k

  • Contributor
  • Posts: 48
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #103 on: August 26, 2020, 04:17:51 am »
Got one, paid with Sripe and the transaction went through without problems (Mastercard). By the way I paid with Stripe because I suppose that the fees are better than PayPal, is that true? What payment method should we choose to maximize your profit?
 
The following users thanked this post: djadeski

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #104 on: August 26, 2020, 04:42:01 am »
Got one, paid with Sripe and the transaction went through without problems (Mastercard). By the way I paid with Stripe because I suppose that the fees are better than PayPal, is that true? What payment method should we choose to maximize your profit?

PayPal is 2.4%, stripe is 3.2%. I just offer both for convenience.
 

Offline Serpent10i

  • Newbie
  • Posts: 3
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #105 on: August 26, 2020, 04:49:45 am »
The stripe USD to AUD conversion was more favorable for me. 535.38 AUD turned into 400 USD to for paypal and but only 385 USD with stripe(and Visa). I didn't know their fees were higher :(
« Last Edit: August 26, 2020, 05:00:09 am by Serpent10i »
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #106 on: August 26, 2020, 05:22:05 am »
The stripe USD to AUD conversion was more favorable for me. 535.38 AUD turned into 400 USD to for paypal and but only 385 USD with stripe(and Visa). I didn't know their fees were higher :(

Stripe apparently uses the forex spot price.. PayPal wants a foreign transaction fee
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #107 on: August 26, 2020, 05:28:08 am »
Got one, paid with Sripe and the transaction went through without problems (Mastercard). By the way I paid with Stripe because I suppose that the fees are better than PayPal, is that true? What payment method should we choose to maximize your profit?

PayPal is 2.4%, stripe is 3.2%. I just offer both for convenience.

International paypal?

https://www.ebayfeescalculator.com/au-paypal-calculator/

has it at 3.6
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #108 on: August 26, 2020, 05:53:37 am »
The stripe USD to AUD conversion was more favorable for me. 535.38 AUD turned into 400 USD to for paypal and but only 385 USD with stripe(and Visa). I didn't know their fees were higher :(

Wow, that's significant.
I buy in USD but sell in AUD for various reasons so either have to keep adjusting my prices as the exchange rate changes, or win/lose as it fluctuates. So that US$365 price in AUD equivalent is just what xe.com told me today.
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #109 on: August 26, 2020, 06:00:10 am »
PayPal is 2.4%, stripe is 3.2%. I just offer both for convenience.
International paypal?
https://www.ebayfeescalculator.com/au-paypal-calculator/
has it at 3.6

I just checked and it is 3.65%
I must be confusing it with something else.
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #110 on: August 26, 2020, 06:02:11 am »
PayPal is 2.4%, stripe is 3.2%. I just offer both for convenience.
International paypal?
https://www.ebayfeescalculator.com/au-paypal-calculator/
has it at 3.6

I just checked and it is 3.65%
I must be confusing it with something else.

Ah, 2.6% for Australia

 

Offline Kean

  • Supporter
  • ****
  • Posts: 1086
  • Country: au
  • Embedded systems & IT consultant
    • Kean Electronics
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #111 on: August 26, 2020, 06:04:43 am »
I'm glad I went with the convenience option (PayPal One-Touch) then if you got an extra few bucks out of it.  I considered using Stripe as I thought it might have lower fees.

(Edit because I can't speel)
 

Offline Weston

  • Regular Contributor
  • *
  • Posts: 95
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #112 on: August 26, 2020, 06:21:22 am »
Are the sensors accessible to read off the part number? I don't think this probe use a hall effect sensor, hall sensors don't have the bandwidth.

They most likely use a TMR sensor made by Multi Dimension, something like this: https://www.aecsensors.com/components/com_virtuemart/shop_image/product/Magnetic-Tunnelling-Magnetoresistive-(TMR)-Linear-Sensors/pdfs/TMR2503-Datasheet-EN-V1.0.pdf

I am unsure why they use two sensors. My best guess would be that the outputs are summed to improve SNR or to reduce the impact of stray magnetic field.

Looks like the design is a basic analog front end with a microcontroller for the user interface and auto zeroing, pretty similar to the current probe I am designing based on a higher bandwidth AMR sensor.
 
The following users thanked this post: EEVblog, Elasia

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #113 on: August 26, 2020, 06:52:13 am »
Are the sensors accessible to read off the part number? I don't think this probe use a hall effect sensor, hall sensors don't have the bandwidth.

I think I'd have to crack it open somehow, seems glued in place.
Two 4 pin SIP packages, one marked 8877, the other one not marked, possibly mounted backwards.
« Last Edit: August 26, 2020, 06:56:24 am by EEVblog »
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #114 on: August 26, 2020, 07:45:53 am »
The sensors
 
The following users thanked this post: 2N3055, Elasia, Martin72

Online Hydron

  • Frequent Contributor
  • **
  • Posts: 510
  • Country: gb
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #115 on: August 26, 2020, 10:53:03 am »
Thanks for opening one up and taking the photos Dave, I'll be telling work to buy one but 99% chance they sit on it until you're sold out.

Any chance that you can check the gain that the AD8421 is running at? Should be as simple as measuring the resistance between pins 2 and 3 of the IC. I assume that the relay will change gains (hence the two trimpots) but should be easy enough to tell what the default gain is - it'll be the startup gain if the relay doesn't click on power-up, or the other one if it does.
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #116 on: August 26, 2020, 10:57:30 am »
20 sold so far.
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #117 on: August 26, 2020, 11:52:38 am »
Are the sensors accessible to read off the part number? I don't think this probe use a hall effect sensor, hall sensors don't have the bandwidth.

They most likely use a TMR sensor made by Multi Dimension, something like this: https://www.aecsensors.com/components/com_virtuemart/shop_image/product/Magnetic-Tunnelling-Magnetoresistive-(TMR)-Linear-Sensors/pdfs/TMR2503-Datasheet-EN-V1.0.pdf

I am unsure why they use two sensors. My best guess would be that the outputs are summed to improve SNR or to reduce the impact of stray magnetic field.

Looks like the design is a basic analog front end with a microcontroller for the user interface and auto zeroing, pretty similar to the current probe I am designing based on a higher bandwidth AMR sensor.

wow i had no idea tmr sensors are now mass produced, thats wild... i'll have to remember this nugget now..
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #118 on: August 26, 2020, 07:53:06 pm »
Full album here:
https://www.flickr.com/photos/eevblog/albums/72157715635511053

Uses an AD8421 inamp on the front end with dual hall effect sensors and relay switching.

Micsig CP2100B Current Probe Teardown by Dave Jones, on Flickr

Still I can´t believe they´re so cheap to buy - Even when this clamp would costs three times more, the value for money would still be great.
Wow, just wow.

I wonder what the differences between the 800khz and 2Mhz versions are...and where.

Edit:

Quote from: EEVblog
Not sure if I'll bother to carry the CP2100A model?

Why not, it got the same incredible quality and with appx 200 buck it would be more affordable.
Looking for other brands, you won´t find 800khz bw under 1000 bucks and more.

« Last Edit: August 26, 2020, 07:58:26 pm by Martin72 »
 

Offline technogeeky

  • Frequent Contributor
  • **
  • Posts: 549
  • Country: us
  • Older New "New Player" Player Playa'
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #119 on: August 26, 2020, 09:57:52 pm »
I got one, declined card, paid with paypal, then it said it didn't go through, then finally it said the order is processing so I can't submit it.
Hope for the best!

I have a new Stripe credit card option, a couple of cards have failed since I started it, no idea why, that's a Stripe thing.
There are no pending orders, so yours must be in there.

 :-+

Stripe failed me, but PayPal worked a treat. Thanks Dave!

I'm excited to get my hands on something that approaches thousands of dollars of value for so much less.
 

Offline technogeeky

  • Frequent Contributor
  • **
  • Posts: 549
  • Country: us
  • Older New "New Player" Player Playa'
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #120 on: August 26, 2020, 10:00:17 pm »
18 left.
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #121 on: August 27, 2020, 03:51:55 am »

Still I can´t believe they´re so cheap to buy - Even when this clamp would costs three times more, the value for money would still be great.
Wow, just wow.

I wonder what the differences between the 800khz and 2Mhz versions are...and where.

Edit:

Quote from: EEVblog
Not sure if I'll bother to carry the CP2100A model?

Why not, it got the same incredible quality and with appx 200 buck it would be more affordable.
Looking for other brands, you won´t find 800khz bw under 1000 bucks and more.

So get that A model and take some pictures :P

Really though i'd 99% bet on it being just some chippies OR.. more than likely it is this.. they are binning them.  Why? Dave already said it himself.. they couldnt keep up with producing 2.5MHz rated versions... almost certainly means they were rebranding them as the lessor A model via binning.  So you are really just paying for better quality parts


Also of interest there is a little known X version that was suppose to be rated for only up to 300 kHz
 

Offline Weston

  • Regular Contributor
  • *
  • Posts: 95
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #122 on: August 27, 2020, 06:57:39 am »

Still I can´t believe they´re so cheap to buy - Even when this clamp would costs three times more, the value for money would still be great.
Wow, just wow.

I wonder what the differences between the 800khz and 2Mhz versions are...and where.

Edit:

Quote from: EEVblog
Not sure if I'll bother to carry the CP2100A model?

Why not, it got the same incredible quality and with appx 200 buck it would be more affordable.
Looking for other brands, you won´t find 800khz bw under 1000 bucks and more.

So get that A model and take some pictures :P

Really though i'd 99% bet on it being just some chippies OR.. more than likely it is this.. they are binning them.  Why? Dave already said it himself.. they couldnt keep up with producing 2.5MHz rated versions... almost certainly means they were rebranding them as the lessor A model via binning.  So you are really just paying for better quality parts


Also of interest there is a little known X version that was suppose to be rated for only up to 300 kHz

I doubt they are binning them, this is a pretty commodity thing.

The only non-jellybean part in there is the TMR sensor, and those are a relatively mature part ( I ordered some samples off amazon for a few dollars a few months ago). If there was variance on the TMR sensor it would be pretty simple to bin them before assembly.

This device is a good deal for what is on the market right now, but the production costs are pretty low. I would not be surprised if the most expensive parts of the whole thing was the nice plastic case and the custom mechanical components. The big change is this is the first design on the market using a higher bandwidth magnetic sensor as opposed to a low bandwidth hall effect sensor used on the cheap probes, or the hybrid hall effect + current transformer used on the super expensive current probes.

 

Offline Kean

  • Supporter
  • ****
  • Posts: 1086
  • Country: au
  • Embedded systems & IT consultant
    • Kean Electronics
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #123 on: August 27, 2020, 02:19:39 pm »
Has anybody ever looked at the Instrance ICP5000 current probes?

They supposedly can do DC or AC to 20A with bandwidth of 25 or 50MHz.  They also make a "matching" differential probe IIP1000.

You can find them on AliExpress or Ebay - e.g. https://www.aliexpress.com/item/32827427938.html
Or here is the manufacturer product page http://www.instrance.com.cn/en/ProductView.asp?ID=63

I don't generally have a need to measure beyond 2MHz right now, or if I do I have some RF current probes.
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #124 on: August 27, 2020, 08:02:05 pm »
Oh, interesting....
Never saw it before, looks like a tek/hioki clone.
Noisefloor 1mVrms=10mArms, accuracy 3%.
Hm-hm...Interesting.

Quote
I would not be surprised if the most expensive parts of the whole thing was the nice plastic case and the custom mechanical components.

If Micsig could pull out the technical design and real good building quality at such a low price, these "alternatives" are much more overpriced:


Rigol RP1002C for 1886€

Testec TT-CC990 for 1178€

R&S RT-ZC02 for 898€

Siglent CP4070A for 842€

Online Hydron

  • Frequent Contributor
  • **
  • Posts: 510
  • Country: gb
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #125 on: August 27, 2020, 09:15:05 pm »
Huh, looks like Pintech is also doing Tek/Hikoi style probes too now (as well as some of the lower bandwidth ones similar to the links above):
http://en.pintech.com.cn/bls_html/urrentprobeblsarticlelist/bls_article_list12.html

I wonder how closely the construction matches the Tek ones - they business end of those hasn't really changed since the 60s!

Note that there is also Pintek as well in the same market space (albeit without the tek/hikoi type offerings) - I'm not sure who copies who (or if it goes both ways), but the names are bad enough.
 

Offline tautech

  • Super Contributor
  • ***
  • Posts: 19375
  • Country: nz
  • Taupaki Technologies Ltd. NZ Siglent Distributor
    • Taupaki Technologies Ltd.
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #126 on: August 27, 2020, 09:21:02 pm »
Pintech is China company and Pintek is Taiwan.
AFAIK Pintek is the older company and first made the likes of DP-25 differential probes after which they were copied by Pintech.

Pintek's current probe offerings:
http://www.pintek.com.tw/product_classify/landersound-tail/index.php?Product_Site_Classify_SN=33672&PHPSESSID=5ubfkn4vbbie2hnjkpk2r07am6&Company_SN=6002
Avid Rabid Hobbyist
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #127 on: August 27, 2020, 09:22:04 pm »
Quote
I wonder how closely the construction matches the Tek ones - they business end of those hasn't really changed since the 60s!

There was no need to change anything, the concept was brilliant until nowadays.
And what the clones concerns - Looking at ebay, many parts from the tek probes are offered from china.
I think, they´ve examined it, now they don´t need them anymore and selling them... 8)

Offline Weston

  • Regular Contributor
  • *
  • Posts: 95
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #128 on: August 28, 2020, 01:44:48 am »
Oh, interesting....
Never saw it before, looks like a tek/hioki clone.
Noisefloor 1mVrms=10mArms, accuracy 3%.
Hm-hm...Interesting.

Quote
I would not be surprised if the most expensive parts of the whole thing was the nice plastic case and the custom mechanical components.

If Micsig could pull out the technical design and real good building quality at such a low price, these "alternatives" are much more overpriced:


Rigol RP1002C for 1886€

Testec TT-CC990 for 1178€

R&S RT-ZC02 for 898€

Siglent CP4070A for 842€


Aside from the high bandwidth probes similar to the tek models, which are a hybrid current transformer and hall effect sensor, those alternatives are indeed even more overpriced. Its the same technology used in cheap PCB mount current sensors, a TMR/hall effect sensor and some commodity opamps.

I know because I have designed the same thing, except using a higher bandwith AMR sensor. Development is ongoing, but I am going to be launching it as a crowd funded project in the next few months https://www.flickr.com/photos/63341195@N08/albums/72157715180470002 

Test equipment has a huge markup compared to other products, their profit margins must be very large.
 

Offline JonM

  • Supporter
  • ****
  • Posts: 155
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #129 on: August 28, 2020, 02:27:10 am »

Trying to justify one of these for myself so trying to understand.  A few questions:
1.  Wouldn't you need to look at a much higher scope frequency to see any ringing?
2.  On a typical solar inverter or SMPS would there typically be any place that large a probe would fit that would be worth while to see ringing?

That specifically was a dig at the CP-65 and clones of it.. yeah.. it rings at that low of a frequency x_x

I'd point you to watch this guy's review of it.. and yeah he kinda looks like he came from metallica lol



The Kiss Analog guy compared the Micsig to a Fluke 80i-110s which appears to be identical to my HP 1146A current probe (delivered in an Agilent box in late 2000). Presumably neither Fluke nor HP made that probe.

I just got an email from Suse with the tracking number for my CP2100B so I will remove the battery from the 1146A and store it out of the way...
 

Offline maginnovision

  • Super Contributor
  • ***
  • Posts: 1914
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #130 on: August 30, 2020, 06:51:21 pm »
Well mine is supposed to be delivered today from Dave and as luck would have it I'm not home. Let's hope nobody decides to take it. Hasn't happened before but always a first time.
 

Offline Kean

  • Supporter
  • ****
  • Posts: 1086
  • Country: au
  • Embedded systems & IT consultant
    • Kean Electronics
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #131 on: August 31, 2020, 04:05:48 am »
Mine has gone walkabout thanks to Australia Post.  It is still somewhere in Sydney, so hopefully it will arrive tomorrow.
 

Offline maginnovision

  • Super Contributor
  • ***
  • Posts: 1914
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #132 on: August 31, 2020, 04:35:27 am »
Wow, that's pretty bad it makes it to my house in Ca, USA before you.
 

Offline Kean

  • Supporter
  • ****
  • Posts: 1086
  • Country: au
  • Embedded systems & IT consultant
    • Kean Electronics
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #133 on: August 31, 2020, 04:55:05 am »
Wow, that's pretty bad it makes it to my house in Ca, USA before you.

Especially as shipping USA to AU is really slow right now, and I can't even get stuff delivered at all from some European countries, at least without paying a small fortune.

Postal service vs DHL Express
40km vs 12,000km
AUD $8 vs $30
6? days vs 5? days

And just for fun, tracking info currently shows it in a non-existent Sydney suburb "BROOKVALEOREST".  The suburbs of Brookvale and Frenches Forest are actually further away from me than Dave's lab.
 

Offline maginnovision

  • Super Contributor
  • ***
  • Posts: 1914
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #134 on: August 31, 2020, 05:04:10 am »
Here in the US I get that kind of service from FedEx. All my packages go the wrong way a couple days before starting the right way and then they don't attempt delivery for a couple days.

Rise time good at 125.8ns and delay at 136ns at 10A, and 116ns at 100A using the same current. Looks pretty good.
« Last Edit: August 31, 2020, 06:07:21 am by maginnovision »
 

Offline Kean

  • Supporter
  • ****
  • Posts: 1086
  • Country: au
  • Embedded systems & IT consultant
    • Kean Electronics
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #135 on: August 31, 2020, 09:38:58 am »
Well it turns out the tracking info was bogus.  I got home from a full day client meeting to find it on my bench.  My wife had gone for a walk and collected it from the post office.  I'll take it into the office tomorrow, but not sure when I will have a chance to test it out.
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #136 on: August 31, 2020, 10:47:02 am »
Mine is still in sydney... it left and came back a half hour later lol

good thing its just a spare and dont need it
 

Offline Cubdriver

  • Supporter
  • ****
  • Posts: 2953
  • Country: us
  • Nixie addict
    • Photos of electronic gear
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #137 on: August 31, 2020, 05:56:08 pm »
Mine's apparently made it through Customs, and will allegedly arrive on Thursday the 3rd.

-Pat
If it jams, force it.  If it breaks, you needed a new one anyway...
 

Offline JonM

  • Supporter
  • ****
  • Posts: 155
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #138 on: September 01, 2020, 11:07:49 pm »
Mine was supposed to arrive on Thursday the 3rd but it arrived today, Tuesday the 1st.

I only did a quick test but it was nice to get power from the scope's USB port. I was reminded of old Tek and/or LeCroy scopes that had multi-pin LEMO connectors to power active probes.

Dave still has 10 CP2100B s left, get one before they are gone!
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #139 on: September 01, 2020, 11:17:12 pm »
Well it turns out the tracking info was bogus.  I got home from a full day client meeting to find it on my bench.  My wife had gone for a walk and collected it from the post office.  I'll take it into the office tomorrow, but not sure when I will have a chance to test it out.

Tracking in the last month since the whole Victorian thing has been completely screwed up for some reason.
Many people saying the tracking just says "Picked up" and then nothing, and then suddenly it just turns up (two weeks later for Victorians).
 
The following users thanked this post: Kean

Offline Cubdriver

  • Supporter
  • ****
  • Posts: 2953
  • Country: us
  • Nixie addict
    • Photos of electronic gear
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #140 on: September 02, 2020, 02:38:16 am »
Mine showed up early, too - got it today.  I'm impressed - less than a week from Australia to CT.  Haven't gotten to play with it yet, but should soon.  Looks like a nice piece of kit.   :-+

-Pat
If it jams, force it.  If it breaks, you needed a new one anyway...
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #141 on: September 02, 2020, 12:38:55 pm »
Well it turns out the tracking info was bogus.  I got home from a full day client meeting to find it on my bench.  My wife had gone for a walk and collected it from the post office.  I'll take it into the office tomorrow, but not sure when I will have a chance to test it out.

Tracking in the last month since the whole Victorian thing has been completely screwed up for some reason.
Many people saying the tracking just says "Picked up" and then nothing, and then suddenly it just turns up (two weeks later for Victorians).

Same crap here in the states but that has only been the last month or two from trump taking a wreaking ball to the postal service.  DHL goes through the post for the last mile in my area and it just got to them.  Maybe have it in a week if i am lucky.. cant even go pick it up as its in a pallet bundle at the local distribution plant and they arent allowed to pull from it.

When are you going to put down that fixed dumpster scale and uploaded this probes review?  :-DD  :-+
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #142 on: September 03, 2020, 10:18:05 pm »
Just got mine in, thanks Dave!

Interesting nugget... I have serial number 31000-1166 from Dave and is dated 8/17/20 with the 2 MHz label, and my other one here is 31000-1161 dated 7/22/20 and is labeled 2.5 MHz

So looks like they cut over just after 1160s, i'll have to set something up to compare them sometime
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #143 on: September 03, 2020, 10:24:58 pm »
Well....2Mhz or 2.5, I don´t care about - It´s way beyond my needs anyway... 8)
But I´l habe a look on the serial number of my new arrived one in early august.
It´s on the work for testing it with "real" currents, so I can tell it later.



Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #144 on: September 04, 2020, 01:29:08 am »
Just got mine in, thanks Dave!
Interesting nugget... I have serial number 31000-1166 from Dave and is dated 8/17/20 with the 2 MHz label, and my other one here is 31000-1161 dated 7/22/20 and is labeled 2.5 MHz
So looks like they cut over just after 1160s, i'll have to set something up to compare them sometime

I'd be interested to see a teardown difference in the 800kHz model.
 

Offline Kean

  • Supporter
  • ****
  • Posts: 1086
  • Country: au
  • Embedded systems & IT consultant
    • Kean Electronics
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #145 on: September 04, 2020, 06:16:37 am »
Just got mine in, thanks Dave!

Interesting nugget... I have serial number 31000-1166 from Dave and is dated 8/17/20 with the 2 MHz label, and my other one here is 31000-1161 dated 7/22/20 and is labeled 2.5 MHz

So looks like they cut over just after 1160s, i'll have to set something up to compare them sometime

Mine has a serial number of 31000-1523 and is labelled as 2MHz.  Dated same as yours 2020-08-17.
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #146 on: September 04, 2020, 06:23:12 am »
Just got mine in, thanks Dave!

Interesting nugget... I have serial number 31000-1166 from Dave and is dated 8/17/20 with the 2 MHz label, and my other one here is 31000-1161 dated 7/22/20 and is labeled 2.5 MHz

So looks like they cut over just after 1160s, i'll have to set something up to compare them sometime

Mine has a serial number of 31000-1523 and is labelled as 2MHz.  Dated same as yours 2020-08-17.

All my units are 2MHz.
They might have re-labled old stock units. I don't believe there is any electrical change, they just decided to be more conversative with the spec based on production testing.
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #147 on: September 04, 2020, 08:32:29 am »
My 2.5 Mhz version got the S/N 31000-1044 and is dated from 29.05.2020

Offline voltlog

  • Regular Contributor
  • *
  • Posts: 98
  • Country: ro
    • VoltLog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #148 on: September 23, 2020, 05:06:54 am »
I recently got the CP2100A and I did a review & teardown on my yt channel I will link the video below the text. I also published some images from the teardown here so if you are interested in taking a closer look to identify any differences between the A and B variant, these should help. From what I could tell the markings on the sensor is 8877 which is the same as what you guys have on the 2MHz B variant, right? BTW if you are looking to get the CP2100A 800KHz there is a discount code mentioned on my video, you could use that to get a better deal.

 
The following users thanked this post: EEVblog, Barryg41, fanOfeeDIY, Elasia, Martin72

Offline Algasman

  • Contributor
  • Posts: 8
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #149 on: October 13, 2020, 09:13:23 pm »
After following the discussions and trying to decide if I should go with the A or B version, I decided for the economic more bang for the buck A-Version.
Last week I got it delivered so I wanted to check the performance myself. The results are almost too good to be true, so I would like to know if you agree with my test setup.
[attach=1]
SDG1032X as source, feeding a BNC-connector through 5 loops on the current probe clamp into 3x150 Ohms. SDS1204X-E Channel 1 Voltage of 50 Ohm load resistor, 10x Probe, Channel 4 CP2100A 2x (because of the 5 turn coil)
[attach=2]
During measurement, I maintained 2,50V RMS over the load resistor, and measured the current as RMS (nominal 50mA)
[attach=3]
This picture shows the voltage and current @800kHz, the nominal bandwidth of the CP2100A.
[attach=4]
To me this looks much better than the specs, is my setup suitable for bandwidth measurement?
 

Offline Algasman

  • Contributor
  • Posts: 8
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #150 on: October 22, 2020, 11:14:36 am »
No complaints so far ...
Looks like I got an A-Version with almost B-Specs. I’d say my unit has a bandwidth > 2MHz.
Maybe the binning Elasia suggested in an earlier post, isn’t so unlikely.
Would be nice to see a similar measurement with a real B Probe or other A versions.
Suggestions for a better test setup are also welcome.
Here are my measurements and an updated graph:
[attachimg=1]
 
The following users thanked this post: voltlog, 2N3055

Offline bicycleguy

  • Regular Contributor
  • *
  • Posts: 149
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #151 on: October 23, 2020, 03:41:16 am »
I have a B model to compare.  Did you re-adjust the SDG output at each level.  I noticed the voltage across the resistor drops a little with frequency.
 

Offline Elasia

  • Frequent Contributor
  • **
  • Posts: 624
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #152 on: October 23, 2020, 10:31:13 am »
I'd still put my money on that they would bin them

Solid design.. some flux in the components so just mass produce in one step with common components for cheap then tune after -> then a grading bin and done
 

Online EEVblog

  • Administrator
  • *****
  • Posts: 32032
  • Country: au
    • EEVblog
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #153 on: October 23, 2020, 11:00:22 am »
After following the discussions and trying to decide if I should go with the A or B version, I decided for the economic more bang for the buck A-Version.
Last week I got it delivered so I wanted to check the performance myself. The results are almost too good to be true, so I would like to know if you agree with my test setup.
[attach=1]
SDG1032X as source, feeding a BNC-connector through 5 loops on the current probe clamp into 3x150 Ohms. SDS1204X-E Channel 1 Voltage of 50 Ohm load resistor, 10x Probe, Channel 4 CP2100A 2x (because of the 5 turn coil)
[attach=2]
During measurement, I maintained 2,50V RMS over the load resistor, and measured the current as RMS (nominal 50mA)
[attach=3]
This picture shows the voltage and current @800kHz, the nominal bandwidth of the CP2100A.
[attach=4]
To me this looks much better than the specs, is my setup suitable for bandwidth measurement?

The bandwidth of the A model is 2.3MHz?  :-//
 

Offline Algasman

  • Contributor
  • Posts: 8
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #154 on: October 23, 2020, 06:24:29 pm »
I have a B model to compare.  Did you re-adjust the SDG output at each level.  I noticed the voltage across the resistor drops a little with frequency.
Yes
During measurement, I maintained 2,50V RMS over the load resistor, and measured the current as RMS (nominal 50mA)
I measured the voltage at the resistor with channel 1 of the scope and adjusted the output voltage of the signal generator accordingly. Constant voltage on the load resistor leads to a constant current through the loop (“RMS constant” since we're using AC)
The signal generator does not see a pure resistive load, there is also the inductance of the five turn coil. The dent around 4MHz could be some resonance effect.
« Last Edit: October 23, 2020, 06:57:08 pm by Algasman »
 

Offline bicycleguy

  • Regular Contributor
  • *
  • Posts: 149
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #155 on: October 23, 2020, 07:50:17 pm »
Here's a B
It doesn't look a whole lot better.
Code: [Select]
HZ,current(RMS)ma
          1 turn,    5 turns
50000,50,50
100000,48.6,48.7
200000,47.6
300000,48.1
400000,49.1
500000,49.6
600000,49.8
700000,48.8
800000,48.7,51.5
900000,48
1000000,47,50.2
1300000,44,52.2
2000000,37.7,42.6
2300000,35.6,40.9
2500000,34.6,40
3000000,33,38.2
3500000,31.9,37.0
4000000,33,38.4
4500000,31.2,38.4
5000000,23.5,31.7
6000000,10.7,13.1

Perhaps you can plot it with yours to compare.  I only used a single pass through probe.  Have redone some with 5 turns and it looks better.  Don't understand why it would matter as I rebased 50ma @ 50kHz,
« Last Edit: October 23, 2020, 09:41:12 pm by bicycleguy »
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de

Offline Algasman

  • Contributor
  • Posts: 8
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #157 on: October 23, 2020, 09:21:30 pm »
Here's a B
It doesn't look a whole lot better.
# removed data #
Perhaps you can plot it with yours to compare.  I only used a single pass through probe.

Here’s the tough comparison:
[attachimg=1]
The same shape and even the dent at around 4 MHz, only slightly better in the 100 to 600kHz range.
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #158 on: October 23, 2020, 09:39:07 pm »
And now, what are the conclusions ?

Please show your test setup, especially which resistor you´ve used for.

Offline bicycleguy

  • Regular Contributor
  • *
  • Posts: 149
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #159 on: October 23, 2020, 09:42:58 pm »
Redid some data with 5 turns. See edit above.  Maybe should toss the 1 turn for consistency.  Edit maybe shouldn't compare spec to 5 tun.
« Last Edit: Yesterday at 04:46:21 pm by bicycleguy »
 

Online Hydron

  • Frequent Contributor
  • **
  • Posts: 510
  • Country: gb
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #160 on: Yesterday at 11:01:09 am »
When I've done this kind of test I've used a 50R terminator on the scope input as both a well-matched load and the I-to-V conversion for the reference channel - basically have the co-ax from the sig-gen split into 2 wires at the half-way point (BNC to banana adapters are probably good enough here for <3MHz, I use a shielded box for higher frequencies), clamp onto the non-ground wire, then terminate into 50R on the scope. This gives 1V/A or 0.1V/A on the probe and 50V/A as the reference.
 
The following users thanked this post: Algasman

Offline Algasman

  • Contributor
  • Posts: 8
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #161 on: Yesterday at 01:11:03 pm »
After following the discussions and trying to decide if I should go with the A or B version, I decided for the economic more bang for the buck A-Version.
Last week I got it delivered so I wanted to check the performance myself. The results are almost too good to be true, so I would like to know if you agree with my test setup.
[attach=1]
SDG1032X as source, feeding a BNC-connector through 5 loops on the current probe clamp into 3x150 Ohms. SDS1204X-E Channel 1 Voltage of 50 Ohm load resistor, 10x Probe, Channel 4 CP2100A 2x (because of the 5 turn coil)
[attach=2]
During measurement, I maintained 2,50V RMS over the load resistor, and measured the current as RMS (nominal 50mA)
[attach=3]
This picture shows the voltage and current @800kHz, the nominal bandwidth of the CP2100A.
[attach=4]
To me this looks much better than the specs, is my setup suitable for bandwidth measurement?

The bandwidth of the A model is 2.3MHz?  :-//
Yes, I was skeptical too, that’s why I put it up to discussion on your excellent forum!
The similar data from bicycleguys B-type probe pretty much confirms my claim and also Elasias binning theory.
Would be nice to see other A-type measurements (and also B ones)
 

Offline bicycleguy

  • Regular Contributor
  • *
  • Posts: 149
  • Country: us
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #162 on: Yesterday at 04:43:07 pm »
Algasman
I'm not sure that multiple turns thru the clamp are within the spec.  Sure it makes it work better as I show here:
Redid some data with 5 turns. See edit above.  Maybe should toss the 1 turn for consistency.

But how many turns? Where would you stop.  I now think the 5 turn should be dropped and if you re-did with just 1 time thru the clamp your results would match the spec.
« Last Edit: Yesterday at 04:44:43 pm by bicycleguy »
 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #163 on: Yesterday at 05:41:28 pm »
Would be nice to see other A-type measurements (and also B ones)

I´v turned a wire 10 times through the coil, for load I´ve used the integrated 50ohm input and then start bode plot.
Result, see link above.

Offline Noy

  • Regular Contributor
  • *
  • Posts: 156
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #164 on: Yesterday at 08:22:35 pm »
Currently i have a CC-65 (working ok but its more a toy, but it has 10mA resolution...)
Normaly Im measuring in the below 5/3 A range.. So the micsig with 50mA resolution is a bit less attractiv but 800kHz (maybe more ;-) ) would be nice for switching regulator stuff these days (CP2100B would be nice but to expensive for the "sometimes" use case... ) and i can use multiple turns to get a higher resolution...

I found CP2100A for 140€ inkl. Shipping in Ali Express to Germany. Good offer or are these things fake / doesnt meet binning specs?
Should i order better from Batronix?

 

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #165 on: Yesterday at 09:07:31 pm »
Hi,

Please give a link to this offer(I´ve searching on Ali for it, best price was 233€..).
I guess, taxes will be added to the price so I would buy it from Batronix - No stress in case of warranty or money back guarantee...

Quote
working ok but its more a toy, but it has 10mA resolution...

Could you please show a pic with this resolution (10mA/Div.) ?


Offline Algasman

  • Contributor
  • Posts: 8
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #166 on: Yesterday at 09:10:34 pm »
Algasman
I'm not sure that multiple turns thru the clamp are within the spec.  Sure it makes it work better as I show here:
Redid some data with 5 turns. See edit above.  Maybe should toss the 1 turn for consistency.

But how many turns? Where would you stop.  I now think the 5 turn should be dropped and if you re-did with just 1 time thru the clamp your results would match the spec.

Using multiple turns is a common way to increase the probes sensitivity.
In my example the five turns increase the sensitivity by a factor of five so the signal to noise ratio is five times better than with just one turn.

But as usual, there is no free lunch.

Whereas the sensitivity increases linear with every turn, the insertion impedance increases by the square!
So five turns give you 25 times the impedance, 10 turns 100 times the insertion impedance.
It is like a transformer.
« Last Edit: Yesterday at 09:13:15 pm by Algasman »
 

Offline Noy

  • Regular Contributor
  • *
  • Posts: 156
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #167 on: Yesterday at 09:19:19 pm »
€ 131,71  18%OFF | BNC Port Strom Sonde Breite Verwenden Clamp 10A 100A Oszilloskop Zubehör USB Powered DC Testing Universal Mini Elektrische Meter
https://a.aliexpress.com/_mryzsHn


CC-65 Manual:
http://www.hantek.com/m/en/productdetail_77.html
 
The following users thanked this post: Martin72

Online Martin72

  • Super Contributor
  • ***
  • Posts: 1474
  • Country: de
Re: Micsig Current Probe CP2100A/B Tests and Comparing
« Reply #168 on: Yesterday at 09:42:18 pm »
First thought, much too cheap to be true.. ;)



Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf