Received my µCurrent unit last week, and I finally got around to trying it out.
Nicely made, and performs exactly as described. But, since it’s from Dave Jones, that’s exactly what I expected.
Dave has provided lots of info about the µCurrent on his site, so I won’t go into the details. But, I did check the burden voltage:
|0 – 300mA||70uV||60uV|
|0 – 1000uA||10uV||10uV|
|0 – 1000nA||10uV||10uV|
- 1.000 on Rigol DP1308A, run through a 1% resistor (different value for each range).
- voltage drop using BK5491B (50,000 count) DMM.
- output from µCurrent measured with EX505 (4,000 count) DMM.
- Temperature 20°C
Procedure: setup for a particular current range, measure voltage with leads connected together(not through the µCurrent), then measure voltage with leads connected through the µCurrent.
Accuracy of µCurrent output:
Checked the accuracy of the current readings from the µCurrent output against the readings from my BK5491B. When using the EX505 to read the uCurrent output, the readings were ±1 of the last digit. When reading the voltage using the BK5491B, the µCurrent output was exactly correct.