Datasheet

6
Specifications
U1451A/U1452A/U1452AT insulation resistance specifications
Insulation resistance specifications with accuracy of ± (% of reading + number of least significant digit)
Test voltage Range Resolution Accuracy Test current
50 V 6 MΩ 0.001 MΩ 2% + 5 1 mA @ 50 kΩ
< 50 MΩ 0.01 MΩ 2% + 5
~60 GΩ ~0.01 GΩ 2% + 5
2
100 V 6 MΩ 0.001 MΩ 2% + 5 1 mA @ 100 kΩ
60 MΩ 0.01 MΩ 2% + 5
< 100 MΩ 0.1 MΩ 2% + 5
~60 GΩ ~0.01 GΩ 2% + 5
2
250 V 6 MΩ 0.001 MΩ 1.5% + 5 1 mA @ 250 kΩ
60 MΩ 0.01 MΩ 1.5% + 5
< 250 MΩ 0.1 MΩ 1.5% + 5
~200 GΩ ~0.1 GΩ 1.5% + 5
2
500 V 6 MΩ 0.001 MΩ 1.5% + 5 1 mA @ 500 kΩ
60 MΩ 0.01 MΩ 1.5% + 5
< 500 MΩ 0.1 MΩ 1.5% + 5
~200 GΩ ~0.1 GΩ 1.5% + 5
2
1000 V 6 MΩ 0.001 MΩ 1.5% + 5 1 mA @ 1 MΩ
60 MΩ 0.01 MΩ 1.5% + 5
600 MΩ 0.1 MΩ 1.5% + 5
< 1 GΩ 0.001 GΩ 1.5% + 5
~200 GΩ ~0.1 GΩ 1.5% + 5
2
1. The voltage indication on the display refers to the voltage at the DUT (device under test), and the accuracy is according to the DC voltage measurement. The default test voltage is shown in the
table below.
Ω
Mega
position (Mark) 1000 V 500 V 250 V 100 V 50 V
Test voltage 1000 V 500 V 250 V 100 V 50 V
Test accuracy 0% to +20 % 0% to +20 % 0% to +20 % 0% to +20 % 0% to +20 %
The test voltage across a resistor of a value of U
N
× (1000 Ω/V) shall not differ by more than 10% relative to noload (open) voltage, as a result of possibly present AC voltage components in the output
voltage, when a capacitor of 1 F is connected in parallel with the insulation resistance to be measured. U
N
represents the nominal output test voltage.
2. Additional accuracy is to be added to the basic accuracy as shown in the table below.
Voltage 1000 V 500 V 250 V 100 V 50 V
Above 1 GΩ 500 MΩ 250 MΩ 100 MΩ 50 MΩ
Basic accuracy 1.5% + 5 1.5% + 5 1.5% + 5 2.0% + 5 2.0% + 5
Additional accuracy 0.1%/GΩ 0.2%/GΩ 0.4%/GΩ 1.0%/GΩ 2.0%/GΩ