Vitrek V4 - 8 Trouble Shooting & Maintenance; Fuse Rating and Type; Cleaning; Trouble Shooting

Vitrek V4 – Electrical Safety Tester USER MANUAL
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8. MAINTENANCE
Only a qualified person should use the following instructions in order to avoid electrical shock. Do not
perform any service other than contained in the operation instructions unless you are qualified to do so.
8-1. Fuse Rating and type
If the fuse blows, the FUNCTION GENERATOR will not operate. Try to determine and correct the
cause of the blown fuse, then replace the fuse with the correct rating and type shown as below:
Line
voltage
Range Fuse Line voltage Range Fuse
100V
120V
90-110V
108-132V
T 7.0A
250V
220V
230V
198-242V
207-250V
T4A
250V
WARNING: For continued fire protection, replace only with 250V fuse of the specified type and rating,
and disconnect the power cord before proceeding fuse replacement.
8-2. Cleaning
To keep the instrument clean, wipe the case with a damp cloth and detergent. Do not use abrasives or
solvents.
8-3. Trouble Shooting
Problem: Unit passes continuity test even when leads are disconnected.
Solution: Unit has improper test lead zeroing. Press “Utility” key use knob to select “Conti Calibration
Util” short Continuity and return test leads together and then press the “start” button.
Problem: QT-50 Interface or PLC start input does not work.
Solution: Unit has not been set to correct PLC mode. Press “Utility” key use knob to select “TEST
CONTOL MODE. Press the SAVE/EDIT key to edit the field and use the knob to select MODE 3: PLC
ENABLE, then press SAVE/EDIT to save the setting and press MENU to exit the utility mode. The unit
is now configured for remote operation.
Problem: Start button does not start test.
Solution: Unit is set to PLC mode 3. Press “Utility” key use knob to select “TEST CONTOL MODE.
Press the SAVE/EDIT key to edit the field and use the knob to select MODE 1: Normal, then press
SAVE/EDIT to save the setting and press MENU to exit the utility mode. The unit is now set for front
panel operation.
Problem: ACW or DCW test fails right away with DUT attached or even with no DUT.
Solution: Check the setting for minimum current. If it is set above zero, then set to 0.00mA and try
again. Any reading below the minimum current limit value will cause an immediate failure.