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DESCRIPTION OF FRONT AND REAR PANEL ITEMS
TOS8870A
[17] VOLTMETER
Indicates the output voltage for withstanding voltage test.
Directly measures the voltage of the high voltage HIGH VOLTAGE terminal.
The adjustor in the centre of the meter is used to adjust mechanical "0".
[18] TIMER
Presets the withstanding voltage test period. See " Selecting the timer range" on page 13.
[19] TEST VOLTAGE
The dial controls the output voltage for withstanding voltage test. The output voltage increases as
you turn this dial clockwise. Be sure to set the dial at the fully counterclockwise position (zero
position) whenever no test is being done.
[20] OHMMETER
Indicates the resistance measured in insulation resistance test.
The adjustor in the centre of the meter is used to adjust mechanical "0".
[21] TIMER
Presets the insulation resistance test period. See " Selecting the timer range" on page 18.
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