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Control Unit (Cont'd)
11.
Reset. Reset lamp illuminates to show that current trip circuit has tripped. High voltage circuits are
deactivated. Momentary Reset switch must be pressed to extinguish Reset lamp to allow high voltage
to be reapplied after returning Voltage Control to zero.
12.
VOLTMETER RANGE SELECTOR. Rotate to appropriate setting for test voltage.
13.
MAIN POWER INDICATOR. Lights to indicate that power is available for testing.
14.
MAIN POWER CIRCUIT BREAKER. Press I to connect power, Press O to disconnect power.
15.
F1. Control Power Fuse
16.
THERMAL OVERLOAD. Circuit breaker protects primary of high voltage transformer. If circuit breaker
trips, turn High Voltage Off and return Voltage Control knob to zero before resetting.
17.
External Interlock. If desired, remove jumper from connector and replace with cable connected to
contact(s) that must be maintained closed during testing. Some examples include footswitch, dead man
switch, gate interlock, panic button, etc. Only non-energized contact devices may be used. This is a
series 120 VAC circuit that must be maintained closed for high voltage to be activated or maintained.
DCD 4120-10
CONTROLS AND INDICATORS
2-2
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