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How to determine if the Classic Scanner 100 needs an ungrounded probe?

April 26, 2017Classic determine Needs probe scanner ungrounded

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How to determine if the Classic Scanner 100 needs an ungrounded probe?

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Serial No below 1400 need ungrounded installed 1985. Check probe by disconnecting the probe from the instrument and measure the resistance between grounded or ungrounded probe? The probe body and the red wire. Also measure between probe body and yellow wire. Ungrounded probes will show open circuit. Grounded will show 5 – 10 ohms.