- #1
feynmanism
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we drive the Hall probe with ac current and measure the voltage with lock-in amplifier but the problem is that after some time the probe does not function(no current passes through it). Hall probe is driven with the alternative current from the sine output of the lock-in and i max is approximately 0.1 - 0.2 mA.
What can be the problem although the current is so low? Is it related with the connections from the lock-in to the probe or something else related with the alternative current?
What can be the problem although the current is so low? Is it related with the connections from the lock-in to the probe or something else related with the alternative current?