23-02-2017, 06:01 PM
Well, the spec of the 85 is 10M in parallel with <100pF. So I suggest that if you are measuring significantly different to 10M (you are) I suggest that there is a problem with your method of measurement. Or something is very wrong with your DVM.
A good method to verify is to put a 10M resistor in series with the meter, and use a battery. First measure the voltage of battery using DVM. Now connect the 10M in series with the DVM and see what the voltage reading is. If it is half the battery voltage the input resistance is 10M. Anyway, you get the idea.
A good method to verify is to put a 10M resistor in series with the meter, and use a battery. First measure the voltage of battery using DVM. Now connect the 10M in series with the DVM and see what the voltage reading is. If it is half the battery voltage the input resistance is 10M. Anyway, you get the idea.
