This might be a too silly a question to ask, but I am working with the volt-free probes for the first time.
I have a probe TL2 probe that has 4 wires. The user manual states that,
For ‘TL2’ variant, the RED and BLUE cores are the volt free pair. The loop-back is across the BLACK and YELLOW cores. These connections are not otherwise polarity sensitive.
I have a board that has a 2-pin connector, one of them is Digital Ground and the other one is GPIO to a microcontroller. FWI, one of the two volt-free pair has to be connected to the GPIO so that it can be used as an interrupt.
Should one of the other probe be connected to the Digital Ground, or the other two wires that are not volt-free?