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Micsig Current Probe CP2100A/B Tests and Comparing

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Algasman:

--- Quote from: Martin72 on November 02, 2020, 09:30:49 pm ---
See the uni-t ut210e clampmeter thread, there are several possibilities described or look for a watch-demagnetizer in ebay or amazon ( should also work).


--- End quote ---
There are some treads regarding ut210e. You mean the tread with the solder gun?

I have a long forgotten pre millennium audio head demagnetizer. Would that work as well?

Martin72:
Hi,

Have a look on this :

https://www.eevblog.com/forum/testgear/a-look-at-the-uni-t-ut210e/msg3120776/#msg3120776

And the following posts after.

Martin72:
Hi,

At last I could doing the test on "real current" at work today... 8)

I´ve measured several AC and DC currents on a power inverter (dc to ac).

Will put the values in a table, post them later in the weekend.

Values are compared to the ones of a ZES LMG670 high precision power analyzer at the same time.
Values of the micsig are read out via bnc-adaptor to a calibrated fluke 89 multimeter with mV range.

Nice:

Pressing the zero button will bring the output level nearly to zero ( some µV reading from the fluke).

Interesting:

Range is given by a maximum of 70Arms and 100A dc - When exceeding this, a sound and blink alert appears.
Starting at appx 71Arms..good - But when measuring DC, alert will appear not over 100Adc, it appears at appx 82Adc.

The good news:

I´ll let a current of appx 80Adc flowing through the clamp for say 5 minutes - After that, the offset of the clamp was only 260µV and could be bring back to zero again with no problems.

Martin

Martin72:

--- Quote ---Will put the values in a table, post them later in the weekend.
--- End quote ---

And here they are, "real" current measures...
As already written, I´ve used a ZES LMG670 Poweranalyzer for comparing and a Fluke 89IV for readout the micsig probe.
Don´t wonder about the random-like values, it´s a "living" test enviroment and I must get what I could get at the moment, so there´s is no 1,2,3,4 A possible - Real life work. 8)

So we´ve done bandwith-measures, we´ve done rising time measures via the deskew fixture and finally "real" current measures instead of turning some wires through the clamp.
So my final verdict is already known.

Best from what you can get for the money - "More" will cost much more in this case, because in my opinion, only the hioki things will "beat" the micsig clearly and in every aspect.
So don´t waste your money for clamps which couldn´t do it better, but cost much more (see links in the very first post).
Personally, I need a clamp which can measure milli-amps to several amps and so I´ll still looking for an tekprobe with amplifier or giving the china-clone a try.
Until that, I could live easily with this gem here.

Noise in the mA range is no problem when you use the averaging function of your scope and normally, the micsig would already fits for everything I do.
But sometimes I´ll need a smaller clamphead.
Nevertheless, best bang for money, best bang under 1000bucks or more, depending on new or used probes.
That´s it.

Martin

Martin72:

--- Quote from: Algasman on November 02, 2020, 08:49:38 pm ---Looks nice, but if the stated sensitivity is true, then you get only 20mV at full scale with ~1mV RMS noise on top. I hope that’s not true.

--- End quote ---

It´s not true...

On their homepage, there are more detailed specs for it avaible.

On this, they claimed a conversation ratio of 100mV/A, with max 1mA noise....Not bad...

http://www.instrance.com.cn/En/ProductView.asp?ID=63

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