Hioki ST5540, Instruction Manual, Page: 134 / 326

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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