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freddo: Do you have a preferred first test on the cable? If you do I will jot down a test schedule including how to connect 'what to what'. Otherwise I will decide.
Do you think 5ish seconds for one voltage measurement immediately followed by 5ish seconds for another will give you enough time to read your dvm and then record the values?
Looking at my little video clip I am minded to allow 5ish seconds for the current to settle before the voltage measurements are taken.
The test routine would be: Press a button - wait 5 seconds - in the next 5 seconds interval take a voltage reading - and then in the final 5 seconds interval take a second voltage measurement.
In practice - press a button - watch the dvm until it is settled - record the value - and then when you hear the click of a relay operate wait until the dvm is again settled - record the value.
Do you think 5ish seconds for one voltage measurement immediately followed by 5ish seconds for another will give you enough time to read your dvm and then record the values?
Looking at my little video clip I am minded to allow 5ish seconds for the current to settle before the voltage measurements are taken.
The test routine would be: Press a button - wait 5 seconds - in the next 5 seconds interval take a voltage reading - and then in the final 5 seconds interval take a second voltage measurement.
In practice - press a button - watch the dvm until it is settled - record the value - and then when you hear the click of a relay operate wait until the dvm is again settled - record the value.