7.7 Power On Polarity Switching (to keep equipment under test on during polarity
128
Relay check 2
Do not connect the power cord to the terminal block on the rear panel.
Since turning the relay On supplies power from front terminal block and
the outlet, a power cord connection to the rear terminal block can cause
electric shock.
• Perform a check without connecting equipment under test.
• When the impedance value is or OVER FLOW and the relay is Off, the fuse
in the instrument might have blown.
Performing a fuse check may lead to recovery. (p. 123)
1. Set the instrument circuit breaker to On.
2. Set the ON/OFF relay to .
3. Use a tester or other measuring instrument to
measure the impedance value between the T1
terminal and the L terminal on the terminal block
on the rear panel of this instrument.
4. Make sure that the impedance value is approxi-
mately 102 k.
5. Set the ON/OFF relay to .
6. Like step 2, use a tester or other measuring
instrument to measure the impedance value
between the T1 terminal and the L terminal on the
terminal block on the rear panel of this instru-
ment.
7. Make sure that the impedance value is or
OVER FLOW.
Required items : A device measuring impedance
(for example, a tester)
2
5
Relay check 2 ON/OFF setting screen.
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