30
Accuracy
Accuracy is specified as follows: ± (a percentage of the r a fixed amount)
at 20 °C to 26 °C (68 °F to 78.8 °F), 45% to 55% relative humidity.
Accuracy Table
Test Voltage (V
T
)
50 V – 100 V – 250 V – 500 V – 1000 V
Measurement
Range
10 to 999 kΩ
and 1.000 to
3.999 MΩ
4.00 to
39.99 MΩ
40.0 to
399.9 MΩ
400 to
3999 MΩ
4.00 to
39.99 MΩ
40.0 to
200.0 MΩ
Resolution
1 kΩ
10 kΩ
100 kΩ
1 MΩ
10 MΩ
100 MΩ
Accuracy
V
T
= 50 V: ± (3% R + 2 ct + 2% / GΩ)
V
T
= 100 V: ± (3% R + 2 ct + 1% / GΩ)
V
T
= 250 V: ± (3% R + 2 ct + 0.4% / GΩ)
V
T
= 500 V: ± (3% R + 2 ct + 0.2% / GΩ)
V
T
= 1000 V: ± (3% R + 2 ct + 0.1% / GΩ)
* For all test voltages, when the insulation resistance is ≤2 GΩ, the intrinsic uncertainty is
± (3% R + 2ct.)
Insulation Resistance Test
Test Voltage
Resistance
50 V
10 kΩ to 10 GΩ
100 V
20 kΩ to 20 GΩ
250 V
50 kΩ to 50 GΩ
500 V
100 kΩ to 100 GΩ
1000 V
200 kΩ to 200 GΩ
