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OWON XDM1041 the unknown multimeter...

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robdejonge:
The Holdpeak HP-770D that I currently use is sort of ok for me. Reviews seemed to indicate it was within spec, and performing quite ok. And I've been happy with it until now.

The reason I'm looking at the XDM1041 is not so much for added accuracy (it does have smaller tolerances than the Holdpeak, and a slightly higher count), but more so because 1) it is a bench meter, I wouldn't be carrying it around; and 2) it supports data logging, which would let me monitor things over longer periods of time.

I'd try to sell my Holdpeak, although the market here has lots of cheap multimeters so I'm not sure I'd be able to.

Generally speaking, I can't seem to make up my mind between "it's worth spending $100 on this new meter" and "you don't need this new meter"  |O

So if anyone has arguments either way, please do share! :)

HKJ:

--- Quote from: robdejonge on October 21, 2021, 08:25:31 am ---So the way I look at this is that the maximum burden voltage would be 660mV. My existing meter is a Holdpeak HP-770D and has a burden voltage of 142mV @ 100mA and as a 42,000 count meter would peak at 596mV burden voltage. I'm happy to be corrected, because I've been wondering if this is the right way of calculating that.

--- End quote ---

Typically handheld DMM's uses 100ohm, 1ohm & 0.01ohm as current shunts with two ranges for each shunt and the high uA & mA range will have a voltage drop across the resistor similar to the high mV range. For the 1ohm & 0.01ohm there is also the fuse to account for, it will about double the resistance for the 1ohm shunt, i.e. the burden voltage will typically be about twice the high mV range (This means about 1.2V for a 6000 count meter at 600mA).
A few meters are different either using lower shunt values or moving the high mA range to the 0.01ohm shunt (GW121)



--- Quote from: robdejonge on October 21, 2021, 08:32:55 am ---2) it supports data logging, which would let me monitor things over longer periods of time.

--- End quote ---

If you want to log on a computer, try checking TestController, it support a lot of different meters (Not XDM1041 yet). There is a long thread about it here: https://www.eevblog.com/forum/testgear/program-that-can-log-from-many-multimeters/

Kleinstein:
The burden drop is often the same as the lowest mV range, as the mV range is used to measure the votlage at the shunt. With the older 2000/20000 count meters that was 200 mV. The meters with a 500/600 mV  range as there lowest have slight problem here. The burden would be quite hight an in addition the heat produces with 600 mA and 600 mV is already quite a lot.
In analog times the internal meter movement often got away with even less and a burden voltage of some 100 mV was more typical.

HKJ:

--- Quote from: Kleinstein on October 21, 2021, 09:28:08 am ---The burden drop is often the same as the lowest mV range, as the mV range is used to measure the votlage at the shunt.ore typical.

--- End quote ---

No, it is the highest mV range (200-600mV) for high uA and mA, if the meter has a low mV range (20-60mV) it is used for the low uA and mA range. If the low mv range is missing the internal x10 amplifier if not used for mV, only for current.

theHWcave:
Have a look at my 4 part detailed review of the OWON XDM1041 . I also wrote some python software for logging (works on Linux and Windows) you can download from my Github page https://github.com/TheHWcave/OWON-XDM1041. This link also contains my documentation of the SCPI remote control commands implemented in the XDM1041 (quite comprehensive for what you pay).
The XDM1041 has its flaws. The main one is that by default its slow (but very accurate). It allows you to select faster speeds (sacrificing some accuracy) but you have to do that every time it is powered on (it doesn't remember that setting). Oh and the auto-ranging on capacitor measurement is not working well. If the XDM1041 is your only way to measure capacitance, buy another meter.  And did I mention that supporting PT100 temperature probes is well intended but useless because of the way REL mode is implemented for temperature. (K-type works better but has its own interesting quirks, watch the video or read my earlier posts on the XDM1041)...
Besides the XDM1041, I have an Agilent 34401A, Solartron 7150+ , HP3478A, BM869S, BM235 and a couple of other handhelds but the XDM1041 has become my most often used meter for repair work on the bench because its so convenient, small, and always on.

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