Hello!
I noticed a weird phenomenon on my brand new Siglent SDM3055 in the 2 wire resistance mode.
Somehow it managed to become unresponsive and it did not react to anything connected to the output.
I was making some custom banana cables and I was testing them via the 2 wire resistance mode.
The meter was left sitting running with either a custom banana cable shorting the inputs or with nothing connected.
Eventually I plugged in a cable and the meter didn't react, it kept displaying overland.
I thought that I somehow made a bad solder joint so I tested with a known good cable only to see the meter display overload.
I switched to DC volts mode and then back, with no change in the behavior.
I rebooted the device and the resistance mode started working again.
The only unusual thing that happened was that the banana plugs were lukewarm, I could hold them in my hands without any discomfort, so the resistance measurement was affected by what I think was thermoelectric effect. I think this couldn't have caused the issue that I experienced.
If the warmer plug was plugged into the positive input, the resistance measurement was negative, if the warmer plug was plugged in to the negative input, the resistance reading was higher and it kept going down until it settled at 0.015 Ohms.
I'm wondering if someone else encountered this issue.
I'm running FW 1.01.01.22R1 and the HW ID is 03-00-00-13-00.
I feel that the resistance mode is a bit wonky on this meter.
If I just hold the positive lead for example, without touching any conductive part, the meter starts oscillating between overload and some hundreds of megaohms.
If I hold the conductive part of the positive (and nothing else) the meter shows about 30 megaohms.