B&K Precision 307A - Manual User Manual

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10.9 Insulation Resistance Measurement @ 1000Vdc

Always check for voltage before testing and
measuring on a circuit. This instrument is intended
for measuring Low W and Insulation resistance on
un-energized circuits only.
Use the procedure explained at points 7.2, 7.3, 7.4.

Check the test leads and fuse resistance byzeroing
the test leads and fuse as per the 7.6 procedure.
Connect the test leads to the circuit to be measured
and wait for a few seconds. The instrument will
automatically discharge any remaining energy
which could be present on the circuit, and will check
for voltage at the same time.

Once you are sure that the circuit to be tested is not
energized, then press the button for a short test
duration or press and turn the button for a long test.
Once you end the test, allow a few seconds for the
instrument to automatically discharge the circuit.

N-E

P-E

FOR CONTINUOUS

TESTING, PRESS AND TURN

LOCK

FOR Vac: DO NOT PRESS

PRESS TO TEST

Batt. Check

500W

250V/100MW

500V/200MW

1000V/400MW

INSULATION

CONTINUITY