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Safety Precautions for Testing
Precautions after Output Has Been Turned Off
Risk of electric shock.
• For a while after the output has been turned off, do not touch the items that have
• After the output has been turned off, the TOS93 series tester's internal discharge
During DC withstanding voltage tests and insulation resistance tests, the EUT, test leads, test probes, and
the area around the output terminals are all charged to a high voltage. After the output has been turned off,
be sure to check the following before you touch the items that have been charged to a high voltage.
• The tester's DANGER LED is off.
• "RISE," "TEST," or "FALL" is not shown on the display.
• The tester's voltmeter is indicating "0."
If you will not use the product for some time or if the operator will be away from the product, be sure to turn
the tester's POWER switch off.
TOS9320
been charged to a high voltage, such as the EUT, the test leads, the test probes, and
the areas near the output terminals.
circuit goes into operation and discharges the output voltage. During testing and
before this discharge completes, do not disconnect the tester from the EUT.
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User's Manual
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