Products > Test Equipment
Battery life of multimeters
<< < (3/3)
theHWcave:

--- Quote from: joeqsmith on August 24, 2022, 12:05:14 pm ---
If I don't have a meter that you feel will give wrong results, you could come up with a simple circuit ...

--- End quote ---

I think apart from the BM869S and Fluke 101, the only meter you and I have in common is the UNI-T UT210E. Therefore I gave that one a quick test while in AC-Volts with nothing attached. It does show the problem but not very significantly. The DC current is 1.44mA and adding the AC component just pushes it to 1.58 mA combined. For such low AC currents, there is a noise problem, hence I am feeding it from batteries. To get a clearer picture on the scope I had to apply the 20MHz bandwidth limit and noise also adds a few uA to the measured AC current but not significantly. By turning the UT210E off, I confirmed the primary source is the UT210E. 
You will also find that any beep emitted by the UT210E significantly adds to the AC part but that is understandable and not the problem. 

To see the problem more pronounced you could get yourself a (used) HT118A (and run it through your tests which would be highly interesting and entertaining). Better still the KAIWEETS ST120 (cheaper too). I would mail you my ST120 but I think the postage UK to US would be far more than the meter costs new. :palm:   
Navigation
Message Index
Previous page
There was an error while thanking
Thanking...

Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod