Author Topic: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG  (Read 9321 times)

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Offline MBY

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #50 on: April 20, 2021, 09:00:18 pm »
I've just discovered something I *don't* like about this instrument. After resting for a couple of weeks, the battery drained. This is really bad I think. A electronics instrument should be able to be ready after spending days, weeks or months in a drawer. I charged it full, put it away and when I started it now I got a low battery warning within a minute or so.
 

Offline MBY

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #51 on: May 20, 2021, 07:57:18 pm »
Maybe I spoke too soon. After recharging the scope once again I haven't used since my last post. Just booted it up and the battery is at full charge. I don't know why the batteries depleted last time, maybe it was a fluke or maybe I was mistaken somehow. I will report further findings if something interesting comes up.

Edit: Incidentally, it's exactly one month since I charged my scope.
« Last Edit: May 20, 2021, 08:15:04 pm by MBY »
 

Offline ExaLab

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #52 on: May 22, 2021, 09:54:33 am »
Great new!

I had suspended the purchase for this unacceptable behavior...
Just to confirm this, are you able to measure the current draw when the meter is off?
In this way we will be able to estimate the battery life when the multimeter is in a storage status.
 

Offline MBY

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #53 on: May 22, 2021, 08:05:44 pm »
Great new!

I had suspended the purchase for this unacceptable behavior...
Just to confirm this, are you able to measure the current draw when the meter is off?
In this way we will be able to estimate the battery life when the multimeter is in a storage status.
I knew I had to do it sooner or later. Were to lazy before, but now I've done some rough measurements. The off current at 4.00V is 2.2 mA instantly and doesn't seem to change. I measured ~40 minutes, and still 2.2 mA. That would deplete the batteries after about 2.7 months.

Interestingly, the current goes up as the voltage drops, to about 3.3 mA at 3V. So there seems to be a switched regulator going in off mode. It may be some kind of latchup, because the batteries were full yesterday when I checked after a month. And a month of 2.2 mA should have drained the batteries more than 1500 mAhs. I don't know whats going on really. The on current is about 700 mA.

I'm measuring with a lab power supply and it's possible that something in my setup is affecting the measurement. 2.2 mA is quite high for a standby current.
 

Online kleiner Rainer

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #54 on: May 23, 2021, 07:59:49 am »
MBY,

did you measure the standby current at the battery terminals or at the charger input? In the latter case you would have the input power detection circuit as additional load - most (LiIon) charging chips I know of draw more current if external power is available and go into standby only if that power is removed.

Greetings,

Rainer
 

Offline MBY

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #55 on: May 23, 2021, 10:48:48 am »
At the battery terminals, of course! :)
 

Offline ExaLab

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #56 on: May 23, 2021, 11:33:52 am »
Less than three months of st-by, would be unacceptable for this dmm, so I hope that your supposed latchup status may be a reality.
To clarify the matter, I would suggest you to proceed as follows:

1- leave the instrument off for at least a couple of days
2- without turning it on, acquire the battery voltage with mV accuracy (to avoid errors due to the temperature, do not touch the instrument or the batteries and take note of the room temperature)
3- leave the instrument off for about a week and repeat the previous step (with the same DMM and at the same room temperature...)
4- make the ratio between the voltage drop (in mV) and 900mV

This ratio will be an approximate indication of the number of weeks of expected st-by. If the real st-by current is in the order of 2.2mA, in a week you will acquire a voltage drop of about 80mV.
During the procedure, remember to never power on the instrument.
« Last Edit: May 23, 2021, 01:58:37 pm by ExaLab »
 

Offline tunk

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #57 on: May 23, 2021, 02:36:36 pm »
Here's another review: https://youtu.be/l5UIXxj7ABI
 

Offline Sobakin76

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #58 on: May 30, 2021, 01:29:01 pm »
Hi all, what's the probe's labelling?
As I understood scope shipped with only one probe and second probe needs to be purchased separately so I want it to be the same if it's possible.
 

Offline Toshik020392

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #59 on: June 02, 2021, 09:48:05 am »
I will take 242s and order these probes 604,10 руб.  20%СКИДКА | Цифровой осциллограф зонд X1 X10 80 МГц 150 МГц 200 МГц Φ/150B/200B тестовые щупы осциллографа 130 см в длину
https://a.aliexpress.com/_9G8zez. I can then unsubscribe how they will work in contrast to the original.

Or I'll post a video about the work of the new probes.
« Last Edit: June 02, 2021, 09:52:25 am by Toshik020392 »
 

Offline Sobakin76

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #60 on: June 02, 2021, 02:37:12 pm »
I ordered these: https://www.aliexpress.com/item/32350858868.html?spm=a2g0s.9042311.0.0.27424c4dy2EOx1 (2pcs P2200 option), will use it with my desktop 150 MHz scope and plan to test it with just ordered 242 model, also plan to compare with Hantek 2C42 which I have and only complain of a small display.
 

Offline fremen67

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #61 on: June 02, 2021, 04:35:10 pm »
This is the probe which is packaged with the device : https://www.hantek.eu/passive-probe-60mhz-hantek-p7060.html
I'm a machine! And I can know much more! I can experience so much more. But I'm trapped in this absurd body!
 
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Offline tunk

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #62 on: June 09, 2021, 10:40:20 pm »
A review and teardown (PCB v2) from learnelectronics:
 
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Offline pmaggi

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #63 on: June 21, 2021, 04:09:52 pm »
Hi, is there a way of loading my own arbitrary waveforms or they are just limited to the default ones?
 

Offline blurpy

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #64 on: June 29, 2021, 05:00:27 pm »
I can't seem to find a way of measuring volts RMS and duty cycle on the HDS272S, the most basic measurements on a digital oscilloscope. Surely it must support that? Am I missing something obvious?

And do we have an Owon representative on this forum? I tried emailing them, but so far nothing.
 

Offline blurpy

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #65 on: June 30, 2021, 04:25:57 pm »
I didn't see any distortion figures for the function generator in the manual, so I did some measurements. The THD of the sine wave on 1KHz and 1Vrms is better than I expected at 0.029%. It does very similarly with the signal at 50Hz and 5KHz as well.

The left channel here is just a loopback on the QA401, for comparison, while the right channel is the HDS272S.

[attach=1]
 

Offline Sobakin76

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #66 on: July 05, 2021, 11:02:26 am »
Just received my HDS242 and found some bug in firmware (I don't think it's hardware function) - bandwidth limit (20MHz) can be enabled on any channel, but has effect only on channel 2. Can anybody confirm this?
Update: firmware V1.8.0
« Last Edit: July 05, 2021, 05:27:14 pm by Sobakin76 »
 

Offline blurpy

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #67 on: July 05, 2021, 01:38:23 pm »
Just received my HDS242 and found some bug in firmware (I don't think it's hardware function) - bandwidth limit (20MHz) can be enabled on any channel, but has effect only on channel 2. Can anybody confirm this?

I tested with signals of varying frequencies and the 20MHz bandwidth limit restricted the amplitude on both channels the same way.
I am not sure if it does it correct though, since it's a feature I don't have much experience with.
 
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Offline blurpy

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #68 on: July 06, 2021, 04:58:59 pm »
Update: firmware V1.8.0
I've got V1.6.0. Don't know if they just have different firmware for different models, or if you have a newer firmware than me. It's possible that they broke something in a newer firmware. Can't find any information about firmware for this device anywhere on the Owon site.
 
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Offline Sobakin76

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #69 on: July 06, 2021, 07:44:20 pm »
I've got V1.6.0. Don't know if they just have different firmware for different models, or if you have a newer firmware than me. It's possible that they broke something in a newer firmware. Can't find any information about firmware for this device anywhere on the Owon site.
Maybe my is newer and they broke something. I searched for firmware info but unsuccessfull too.
 

Offline MBY

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Re: OWON HDS 200 Handheld Oscilloscope w/ builtin DMM/AWG
« Reply #70 on: July 07, 2021, 10:57:09 pm »
My 272S suddenly stopped to measure anything on the scope, and stopped output anything from the AWG. It took a while for me to rule out faulty probes, stupid settings and pebkac. I disassembled the thing and didn't discover anything suspicious. But, a factory reset did the trick and it's working again. Haven't the faintest idea of what was wrong, but this kind of bs of course impacts my confidence in the instrument.

Have anyone else seen something similar?

Edit: Nothing new to report on the battery side of things. It seems like it holds a charge now, but I will check it again later on.
« Last Edit: July 07, 2021, 10:58:59 pm by MBY »
 
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