10
WARNINGS AND CAUTIONS FOR OPERATING THE TESTER
TOS8870A
2.4 Remote controls of the Tester
In the case of the Tester is to be remote controlled, the application of high voltage to the Tester will
be controlled by an external signal.Take the following safety precautions to prevent accident. Also,
shall be maintained the safety precaution under positive control.
•
NOT to permit unexpected output of high voltage from the Tester (that is, to prevent the
Tester from being put in TEST ON condition).
•
NOT to permit operator and any other come into contact with DUT test lead-wire,
probe, output terminal, etc. while the Tester is generating high test voltage.
2.5 Inhibitions
2.5.1 Inhibition of rapid ON/OFF repetitions
Once the Power switch of the Tester has been turned off, leave at least several seconds before it is
turned on again. Do not repeat ON-OFF switching of the Power switch particularly when the Tester
is generating the output voltage. In such a case, the safety protection of the Tester may not work
properly, and the operator is endangered.
The power switch shall not be turned off while the Tester is generating the output voltage except in
the case of emergency.
2.5.2 Inhibition of shorting to earth ground
Do not short-circuit the Tester output with the ground or a conveyer or any device connected to the
ground, or with the commercial power-line around Tester location. Such a short-circuit may cause
high-voltage charging on the Tester casing, which is very dangerous.
However, such a risky condition will not arise if only the casing has been grounded, in which case
the casing will not be electrically charged nor will cause the damage on the Tester even when the
LOW terminal has been short-circuited with the HIGH VOLTAGE terminal.
The protective conductor terminal shall be positively grounded using applicable tool.
2.6 Emergency handling
In the case of any accident such as an electric shock or burn-down of the DUT resulting from the
failure of the Tester or DUT, take the following actions promptly. It does not make any difference
whichever action of the above two is taken
fi
rst, but be sure to take the two actions.
•
Turn off (
○
) the POWER switch.
•
Pull out the plug of AC power cord from the socket of the power source.
2.7 Troubleshooting
2.7.1 In case of trouble
In the following cases of trouble, it is very hazardous that the output voltage of the Tester may not
be cut off while the Tester continues to generate high voltage: The immediate action to take, in the
next page cases, is to turn off the power switch and pull out the plug of AC power cord from the
socket of the power source, and suspend the operation of the Tester.
