Kikusui TOS8870A, Operation Manuals

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18
OPERATION PROCEDURE
TOS8870A
When the low limit judgement is not required, turn the low limit reference value setting poten-
tiometer so that the ohmmeter pointer for the low limit reference value indicates a position
lower than the zero ohm scale position.
For some types of tests, it may be undesirable to perform high limit judgement. In such cases,
set the UPPER ON/OFF switch in the OFF state.
5) Setting the test time
To set the test time, set the TIMER ON/OFF switch to ON and then set the timer to 0.5 to 999
seconds according to the standard of the test to be performed for the DUT.
Selecting the timer range
The timer of the tester can be set to 0.5 to 99.9 seconds (in an insulation resistance test) and 1
to 999 seconds by operating the time setup switch and the range selector switch next to it.
When the range selector switch is protruding, the setting of the time setup switch equals the
timer setting. When the range selector switch is pressed, the timer setting equals the setting of
the time setup switch multiplied by 0.1.
The setting of the timer setup switch can be changed by pressing the switches above and
below the numbers.
Fig.3-3
• In a withstanding voltage test, be sure to set the timer to 0.2 seconds or longer period.
• In an insulation resistance test, be sure to set the timer to 0.5 seconds or longer period. Refer to
" Waiting-time for Judgement in Insulation Resistance Test" on page 19.
6) Connecting the DUT
1. Make sure that the DANGER lamp is not illuminating.
2. Connect the LOW test leadwire to the LOW terminal of the Tester.
3. Connect the high voltage test leadwire to the HIGH VOLTAGE terminal.
4. Short the high voltage test leadwire to the LOW test leadwire to make sure that no high
voltage is being delivered to the HIGH VOLTAGE terminal.
5. Connect the LOW leadwire to the DUT.
6. Connect the high voltage test leadwire to the DUT.
S
TIMER
x 0.1
x1
Range selector switch
Time setup switch
9 9 9
+
-
+
-
+
-
NOTE