Datasheet
9
U1451A/U1452A/U1452AT EN61557 specifications
The following specifications are a requirement for European labeling.
Intrinsic uncertainty
Measurement U1451A U1452A/U1452AT Operating uncertainty
1
Voltage ± (0.5% + 2) ± (0.2% + 2) 30%
Earth-bond resistance ± (1.5% + 3) ± (1.0% + 3) 30%
Insulation resistance Based on the test voltage and range. Refer to insulation resistance
specifications for U1451A/U1452A/U1452AT.
30%
1. The maximum resistance to meet the standard of EN61557-1, 5.2.4, which indicates the maximum amount allowed as less than 30%
Test voltage
1, 2, 3
IR < Intrinsic uncertainty (A) Temperature (E3) Operating uncertainty
50 V 12.85 GΩ 27.6% 2% 27.6% + 1.15 x E3
100 V 25.7 GΩ 27.6% 2% 27.6% + 1.15 x E3
250 V 65.5 GΩ 27.6% 2% 27.6% + 1.15 x E3
500 V 131 GΩ 27.6% 2% 27.6% + 1.15 x E3
1000 V 260 GΩ 27.4% 2% 27.4% + 1.15 x E3
1. Specification confidence level to 99.73% as coverage factor up to 3
2. Temperature range is from 0 to 35 °C
3. Test voltage/maximum range for different models:
Test voltage U1451A U1452A U1452AT
50 V – 60 GΩ 60 GΩ
100 V – 60 GΩ 60 GΩ
250 V 60 GΩ 200 GΩ –
500 V 60 GΩ 200 GΩ –
1000 V 60 GΩ 200 GΩ –
U1453A/U1461A EN61557 specifications
The following specifications are a requirement for European labeling.
Intrinsic uncertainty
Measurement U1461A U1453A Operating uncertainty
1
Voltage ± (0.09% + 1) ± (0.09% + 1) 30%
Earth-bond resistance ± (0.5% + 2) ± (0.5% + 2) 30%
± (0.5% + 20)
2
± (0.5% + 20)
2
30%
Insulation resistance Based on the test voltage and range. Refer to insulation resistance
specifications for U1453A/U1461A.
30%
1. The maximum resistance to meet the standard of EN61557-1, 5.2.4, which indicates the maximum amount allowed as less than 30%
2. For 6 Ω range only
Test voltage
1, 2,
IR < Intrinsic uncertainty (A) Temperature (E3) Operating uncertainty
50 V 25.7 GΩ 27.65% 2% 27.65% + 1.15 x E3
100 V 51.4 GΩ 27.65% 2% 27.65% + 1.15 x E3
250 V 131 GΩ 25.65% 2% 25.65% + 1.15 x E3
500 V 260 GΩ 27.45% 2% 27.45% + 1.15 x E3
1000 V 260 GΩ 14.45% 2% 14.45% + 1.15 x E3
1. Specification confidence level to 99.73% as coverage factor up to 3
2. Temperature range is from 0 to 35 °C