56 User’s Manual TOS93 Series
Withstanding Voltage and Insulation Resistance Tests | Setting Test Conditions
Lower limit
Set the reference current or resistance for lower limit judgment. If current less than or equal to Lower is
measured after the voltage reaches the test voltage, lower limit judgment (L-FAIL) results. To disable lower
limit judgment, set Lower to off.
In insulation resistance (IR) tests, the criteria can be set in terms of resistance or current (p.57).
1
On the Home menu screen, press Judgement > Lower.
2
Press Lower to switch between on and off.
Lower switches between on and off each time you press the key.
3
If you select on, use the numeric keypad or the rotary knob to enter the current or
resistance value.
ACW setting range: 0.00 mA to 109.99 mA
DCW setting range: 0.00 mA to 20.99 mA
IR setting range: 0.000 GΩ to 99.999 GΩ, 0.0000 mA to 1.0099 mA
This completes the setting.
Normally, even a good EUT will have a certain degree of leakage current. In ACW or DCW
tests, setting the limit slightly less than the leakage current of the EUT is useful in detecting
EUT errors, breaks in the test leads, and poor connections, enabling you to perform highly
reliable testing.
Example: Home menu screen of ACW
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