Products > Test Equipment
OWON XDM1041 the unknown multimeter...
robdejonge:
The form factor of this dmm is what makes it appealing to me. Like some others, I have a small shelf right over my work surface and it's great to be able to just glance up at my dmm and scope. A 'proper' bench dmm would move to a shelf quite a bit higher, which is the main reason I hesitate to get something like that until I can build a deeper bench.
The YouTube review videos theHWcave did were very insightful (thank you!). The voltage range issue is indeed odd, the bigger brother XDM2041 does not seem to have that issue. Other than that, and based on this thread, this seems to be a pretty decent electronics bench meter!
I do have a few questions ...
* Burden voltage: has anybody had a look at this? I mostly play with 0-5V and 0-1A stuff, so it can be a major pain. My current meter drops the voltage by 142mV at 100mA, which is not too bad.
* Software: although a Mac fanboy, I run Debian on my bench computer and so wonder if there is any software available on there which I can use to control / read this mm. Does anybody have any experience? Using software to do data logging is a major reason I'm looking at this.
* Bar graph: I like me a nice bar graph, but I believe this meter does not have one - correct? I've recently been looking at power supplies which are showing a line graph over time, but I guess I would have seen that mode if it was present. I know, could use my scope.
Might sell my current meter and order this on 11/11 if there is a good deal.
Thanks for your comments.
kwass:
* I measured the current shunts: 500uA/5mA = 101 ohms, 50mA/500mA = 1.2 ohms, 5A/10A = 0.02 ohms. So on the 500mA range, 100mA would be 120mV drop.
* It's pretty standard SCPI, so I'm sure you could find some software for Debian.
* Unfortunately there's no bar graph.
robdejonge:
Thanks for checking that. This is an interesting meter indeed, with a relatively low burden voltage like that!
Kleinstein:
The burden voltage for the 5 and 500 mA range is not low - it is more on the high side. The burden is low for the lower of the 2 ranges. The 20 mOhms for the 5/10A range is low - it this range with a fuse. Quite often a proper fuse has a comparable or even higher resistance. So part of the burden in the 500 mA range is the fuse and with this in mind the value is not that bad.
For a low cost meter it still makes sense to have few shunts and share one of 2 ranges each.
robdejonge:
Hm, okay.
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.
In this overview, only the EEVblog meter has a max burden voltage that is impressively low. Not pushing back on your statement, just explaining why this novice thought 500-600mV was low.
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