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My Accumeasure amplifier reads 13 V dc output, even when I move the probe gap to minimum standoff. What may be wrong?

April 26, 2017accumeasure amplifier dc gap minimum output probe READS

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My Accumeasure amplifier reads 13 V dc output, even when I move the probe gap to minimum standoff. What may be wrong?

1 Answer

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Most likely there is an open circuit between the probe and the BNC connector on the amp. Make sure that the probe cable is properly connected and not damaged. Ensure that a ground return wire is connected from the target to the ground input of the amplifier.