Is it a problem if Electrode terminals are interconnected during use?
There is no problem if Electrode terminals are interconnected. (They can be interconnected either when testing or using 61F Floatless Level Controllers.)
Because of the impedance in the relays that lay between the Electrodes of 61F, less than 2 mA flows between General-purpose Electrodes when the terminals are interconnected. The current that flows between High-sensitivity and Ultra High-sensitivity Electrodes is in the order of microamps.
When interconnecting Electrode terminals of 61F with switches, be sure to use Basic Switches.