TOS5400_Insulation Resistance Test Section-Measurement function

Digital voltmeter

ItemTOS5402TOS5403
Measurement range0V to -1200V
Display (v = measured voltage)v < 10V□ . □ V
10V ≦ v < 100V□□ . □ V
100V ≦ v < 1000V□□□ . □ V
1000V ≦ v□□□□ . □ V
Accuracy±(1% of reading + 1V)

Resistance meter

ItemTOS5402TOS5403
Measurement range / accuracy*1 (i: Measurement current) (R = measured insulation resistance)40nA ≦ i ≦ 100nA200.00MΩ≦R≦10.000GΩ:±(20% of reading)
100nA < i ≦ 200nA100.00MΩ≦R < 5.000GΩ:±(10% of reading)
5.000GΩ≦R≦10.000GΩ:±(20% of reading)
200nA < i ≦ 1000nA10.000MΩ≦R < 5.000GΩ:±(5% of reading)
1 μA < i ≦ 2mA0.001MΩ≦R < 10.000MΩ:±(2% of reading + 5digit)
10.000MΩ≦R < 2.000GΩ:±(2% of reading)
Display (R = measured insulation resistance)25kΩ ≦ R < 1.000MΩ□□□kΩ
1.000MΩ ≦ R < 20.0 GΩ□ . □□□MΩ
□□ . □□MΩ
□□□ . □MΩ
□ . □□□GΩ
□□ . □□GΩ
20.0GΩ ≦ ROVER
Hold featureThe resistance measurement after a test is finished is held while the pass judgment is displayed.
ResponseAverage response (averaged time: Fixed at 100ms)

*1 Humidity: 70%rh or less (no condensation), when there is no interference caused by wobbly test leads or other problems. For measurements of 200 nA or less, the humidity 50%Rh or less.