TOS93 Series User’s Manual 55
Withstanding Voltage and Insulation Resistance Tests | Setting Test Conditions
Upper limit
Set the reference current or resistance for upper limit judgment. If current greater than or equal to Upper is
measured, upper limit judgment (U-FAIL) results. In insulation resistance (IR) tests, you can set Upper to
off if upper limit judgment is not necessary.
In IR tests, the criteria can be set in terms of resistance or current (p.57).
1
On the Home menu screen, press Judgement > Upper.
In IR tests, Upper switches between on and off each time you press the Upper key.
2
Use the numeric keypad or the rotary knob to enter the current or resistance value.
ACW setting range: 0.01 mA to 110.00 mA
DCW setting range: 0.01 mA to 21.00 mA
IR setting range: 0.001 GΩ to 100.000 GΩ, 0.0001 mA to 1.0100 mA
This completes the setting.
Normally, even a good EUT will have a certain degree of leakage current. In IR tests, setting
UPPER slightly greater than the resistance of the EUT is useful in detecting EUT errors,
breaks in the test leads, and poor connections, enabling you to perform highly reliable test-
ing.
Example: Home menu screen of ACW
Switch between on and off.
Example: Home menu screen of IR
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