We have been using a current clamp to measure the current delivered from a current source. Our setup is your 60Amp current clamp connected to the ADC212 oscilloscope. The problem is the readings from the current clamp. Over a 72hr monitoring period, the read current decays approximately 0.8amps in a roughly linear fashion. The current from the source has been verified at a steady 13.6Amps, while the current clamp reading varies. Any help with this would be much appreciated, also what are the tolerances on the readings from the current clamp?
The voltage range is 2V DC. To alleviate the battery problem we have switched to a 9V DC transformer replacing the battery. It seems the base line is moving. We zero the current clamp at the beginning of a recording run, but by the end it has built up a relatively large, 1.4A, negative reading.
Thank you for the extra information, I will try to replicate this by repeating what you have said and let you know the results ASAP. Unfortunately, it will take a while, as I want to test it for the period you are using yours for.
The voltage range you have specified is the one on being used on the ADC-212, but which Voltage to Amp are you using.