TOS93 Series User’s Manual 293
Specifications | Insulation resistance test section
Timer function
Other specifications
Item Specifications
Voltage rise time settings range 0.1 s to 200.0 s
Test time setting range 0.1 s to 1 000.0 s, OFF
Judgment delay (Judge Delay) setting range
1
0.1 s to 100.0 s, AUTO
2
Accuracy
3
±(100 ppm of setting + 20 ms)
1 Less than the sum of the rise time and fall time.
2 If Delay Auto is set to on, UPPER judgment is not made until the charge time ends.
3 This excludes fall time.
Item Specifications
Grounding mode
(GND)
Can be switched between Low and Guard.
Low GND is connected to the low terminal. Measures the current flowing across the low terminal
and chassis (normal applications).
Guard
1
GND is connected to Guard. Measures only the current flowing through the low terminal
(current flowing through the chassis is not measured) (high sensitivity, high accuracy
measurement applications).
Filter function
A low-pass filter can be inserted into the ammeter measurement circuit.
2
1 If there is a possibility that the EUT or tools and the like will be grounded or if you are uncertain, do not set GND to
Guard. Doing so is extremely dangerous because the ammeter will be shorted and will not be able to measure current.
For normal applications, set GND to Low.
2 When the low pass filter is on, a judgment delay of at least 5 seconds and a test time are required.
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