Hioki 3155-01, Instruction Manual

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7.3 Enclosure Leakage Current Measurement Mode (Universal)
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7.3.4 Zero Adjustment (Universal - Enclosure Leakage Current)
Red 9170 TEST LEAD
Equipment to
be measured
Table tap
Zero adjustment is effective only for measurements between the enclosure and
the power line. After performing zero adjustment, the value remains in
memory even if the measuring mode is changed. When the power is turned
off, zero adjustment is ineffective. If the voltage of the power line changes,
perform zero adjustment again.
Zero adjustment is possible in a range from 0 to 500
μ A.
Zero adjustment
1. On the enclosure leakage current measurement screen, set the contact
condition to "between the enclosure and the power line."
2. Plug the power cord of the equipment to be measured into a table tap.
3. Plug the table tap into an outlet.
4. Connect the red 9170 TEST LEAD to the leakage current measurement
terminal T2.
5. Plug the red 9170 TEST LEAD into the table tap.
In this case, do not connect the black 9170 TEST LEAD to the leakage
current measurement terminal T1 and the enclosure of the equipment to be
measured.
6. Press the key on the screen to perform zero adjustment. When zero
adjustment is finished, is displayed on the measuring mode screen, and
indicates that zero adjustment is effective. Press the key again, and
zero adjustment is cancelled, the normal measured value returns and
disappears.
7. Unplug the red 9170 TEST LEAD from the table tap.