Hioki ST5540, Instruction Manual, Page: 133 / 326

7.7 Power On Polarity Switching (to keep equipment under test on during polarity
127
8 9
7
Cha
pter 7
Instru
ment
Syste
m
Settings
1.
Check that the isolation transformer is correctly connected.
2.
On the initial screen, press to display the system screen.
Press and set power on polarity switching to On.
3.
To go directly to a leakage current test without performing relay check 2, press to continue
to tests.
To perform relay check 2, press .
"Relay check 2" (p. 128) checks relay operation by turning the LINE IN power supply line on and
off.
Setting Power On Polarity Switching
Power on polarity switching setting screen
System screen
2
When using power on polarity switching, a nointerrupted performance check
(power on polarity switching wiring check) is performed automatically at the fol-
lowing times:
• When a leakage current mode is selected (during manual measurement)
• When manual operation is selected on a leakage current mode screen
• When the polarity is changed on a leakage current mode screen
• When "START" is selected on a leakage current mode screen
• During panel load operation
If NG occurs, an error screen appears, check the isolation transformer and
instrument connections.
If OK, the leakage current measurement screen appears.
Start measurements.
See "6.3 Measurement examples" (p. 83)
If NG, press to return to the leakage current mode selection screen to
check connections again.
Error screen