So, I recently purchased an Amprobe 38XR-A multimeter from Amazon; I was after a good general electrical/electronics meter, high UL certified Cat rating, good ranges etc. Ended up on this meter mainly because it was one of the few that Amazon will ship directly to New Zealand, and because Dave has a review of the 37XR-A that wasn't bad. His biggest complaint was the 10mV/mA burden voltage, which wouldn't do for me.
So I checked out the data sheet on the 38XR-A, and saw the spec as 1mV/mA and thought; "great, they've fixed the burden voltage issue on the 38," and ordered it.
Fast forward a couple of weeks and I'm measuring the current on an LED. When I put the meter in series with the LED on the mA range, I notice that it is incredibly dim now, barely turning on. I get my other meter and measure 500mV(!) of voltage drop across the meter with a 50mA current. Bugger, the data sheet lied and it is actually 10mV/mA (or this unit is oddly faulty to that value).
As a more controlled example, see attached picture. I'm using my bench supply to source a constant 100mA, with the Amprobe in series on mA, and the crappy UNI-T on DC volts across the Amprobe.
There's this, and also, the protective boot over the positive alligator clip has split, exposing the metal clip underneath, and the buzzer is very sick sounding and changes pitch at random times.
Looks like it'll be going back to Amazon, hopefully they're good about it.