I see, thanks Owen. The context really helps. Would you mind sending a link to the current leakage meter you’re referencing?

Also – I didn’t realize you were referring to measuring current. This reminds me of another issue I discovered. On the RevH PCB, a batch shipped with a bad filter that adds some white noise to the current channel in normal operation. Is the noise you’re referring to only on the current channel or have you seen the problem on the voltage channel as well? And is your meter RevH or RevI? The revision is written on the PCB, you should be able to read it through the bottom of the meter.

If you are using a RevH PCB and seeing a lot of noise in buffer mode on the current channel only, I believe you may be affected by this problem. Please email me at hello@moosh.im and I can arrange a replacement by a later model.

Best
~James