12
OPERATION PROCEDURE
TOS8870A
Chapter 3
OPERATION PROCEDURE
This Chapter describes operation procedures such as single test and automatic test.
3.1 Procedure Before Test
1) Check that the indicator
•
Check that the indicator after being off (
○
) with power switch.
Before turning on
(
︱
)
the POWER switch, check that the voltmeter is indicating the "0" scale
position and the ohmmeter is indicating the "
∞
" scale position. If the meters are not indicating
these positions, adjust them to these positions with their mechanical zero at their centers.
2) Con
fi
rmation of attention on the handling
Before turning on the POWER switch, thoroughly read and note the items of Chapter 2 "WARN-
INGS AND CAUTIONS FOR OPERATING THE TESTER"
3) Reset the Tester
When the PROTECTION indicator lamp is illuminating, test is disabled and cannot be started by
pressing the START switch. The conditions for illuminating of the lamp are given on "5.1 Descrip-
tion of Front Panel Items" on page 31. Eliminate the conditions and then press the STOP switch to
reset the Tester.
•
When the POWER switch is turned on or off, the ohmmeter pointer may de
fl
ect irregularly.
This is only transiential and is not an abnormal indication.
3.2 Single Withstanding Voltage Test
1)
Selecting the withstanding voltage test mode
1.
Select the MANUAL ACW test mode with the FUNCTION selector switches.
2.
The ACW TEST indicator lamp will illuminate. Letter "ACW" stand for withstanding
voltage test.
2)
Selecting a test voltage range
1.
Select the required test voltage range with the RANGE 2.5 kV/5 kV switches.
2.
The corresponding indicator lamp will illuminate.
3)
Setting the high limit reference value of leakage current
1.
With the CUTOFF CURRENT switch, set the high limit reference value (upper reference
value) of leakage current of the DUT as required of standards, and other.
If it is set to 108 mA or higher, PROTECTION results.
CAUTION
NOTE
