T-305E User Manual Version 3.5 | 23
10.
Shut-Down Procedure
The T-305E has an internal high voltage discharge device, which will directly short circuit the
cable, capacitor and ground terminals of the instrument when the power is off. If the power
is shut off directly, without following the procedure below, the residual electric energy
stored in the cable and the capacitor will discharge through this device. This will produce a
loud discharge sound and may reduce the lifespan of the T-305E.
Warning
: The T-305E MUST be shut down strictly according to the below procedures after
the test is finished.
1.
Turn the
ADJUST
knob to the zero position.
2.
Press down the
PULSE
button to release the power stored in the capacitor.
3.
Use the discharge rod in the right way to discharge the faulty cable, until the voltage is
lower than 5kV (watch the kV pointer).
4.
Press down the
STOP
button, the high voltage input will be cut off.
5.
Power off the T-305E.
6.
Further discharge the cable completely using the discharge rod.
Note:
Only after all the HV parts have been fully discharged, the lead wires and test wires can be
touched and removed. Remove the plug from the power socket first, and then remove the
plug on the back panel of the T-305E.
11.
Maintenance and troubleshooting
When the following conditions happen, it is mostly likely caused by an incorrect operation.
Please perform the following correct procedure.
•
The power light is not on when the mains is connected.
Reason: The power switch needs to be pressed to switch on the power. Check the power
cable connection and press the power switch.
•
Pressing the START button has no effect.
Reason: The voltage ADJUST knob is not in zero position. Turn the ADJUST knob to zero
position, then press the START button.
•
When increasing the voltage ADJUST knob after the instrument has started, the
voltmeter does
not react.
Reason: The T-305E is not properly grounded. Ensure that the working GND, the
protective GND and the Auxiliary GND are grounded at different positions.
•
When increasing the voltage, the voltmeter pointer is always at the lower voltage
position, and there is big buzzing noise in the T-305E.
Reason: The work mode is on DC position, and the fault is a low resistance fault. Adjust
the work mode to PULSE position.
This T-305E is a high voltage device, if problems other than the above are identified,
contact Kehui for repair or replacement ([email protected]). Do not try to fix it yourself, this
may cause further damage or injury to the operator.
