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General
If the controls do not operate properly after having been used according to the instructions, the following hints
may help.
•
Check main facility input power to the test set.
•
Check indicating lamps. (Spare lamps are available through Phenix Technologies.)
•
Check fuse-F1.
•
Check all external plug connections on the test set.
Specific Problems Refer to appropriate electrical diagrams.
1. High Voltage cannot be turned on?
•
Voltage Control dial is not in Zero Start position.
•
External interlock circuit open.
•
Current Trip setting too low or needs reset.
•
Current trip circuit damaged, won't reset, try replacing U13.
•
Faulty HV On switch, faulty HV Off switch.
•
Faulty relay contacts.
2. Voltage control inoperable?
•
Tripped or faulty Thermal Overload.
•
High voltage is not on (see number 1 above).
•
Faulty Variable transformer T1.
•
Faulty High Voltage tank assembly.
3. Over current inoperable?
•
Faulty U13.
•
Faulty DC Power Supply circuit.
•
Faulty relay contacts.
•
Faulty R7 over current trip potentiometer.
4. Currentmeter inoperable?
•
Improper connection of GUARD/GND/RETURN jumper (J1) for mode of operation.
•
Improper connection of test specimen.
•
Meter damaged.
•
Faulty currentmeter range switch SW5.
•
Faulty connection in currentmeter circuit.
•
Faulty DC Power Supply Circuit.
5. Voltmeter inoperable?
•
Meter damaged.
•
No high voltage present at output.
•
Faulty connection in voltmeter circuit.
6. No output voltage from high voltage section?
•
Defective metering circuit.
•
No input to voltage regulator section, possible problems with K8 relay or Thermal Overload.
•
High Voltage Cable shorted to shield of cable.
•
Faulty High Voltage Unit.
DCD 4120-10
SECTION 7: TROUBLESHOOTING
7-1
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