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7
Specifications
[2]
Input impedance: > 1 GΩ for 50 mV to 1000 mV. Input impedance is 1.1 MΩ (nominal) with < 100 pF for 5 V to 1000 V
ranges.
[3]
The input signal is lower than the product of 20000000V×Hz (product of voltage and frequency).
[4]
Input current > 35 μArms.
[5]
Current can be measured from 2.5 A up to 10 A continuously. An additional 0.5% needs to be added to the specified
accuracy if the signal measured is in the range of 10 A to 20 A for 30 seconds maximum. After measuring a current of > 10
A, leave the meter to cool down (in switched OFF state) for twice the measurement time used, before using it again to make
low-current measurement.
[6]
Input current < 3 Arms.
[7]
2% over-range on all ranges except AC 1000 V.
[8]
These specifications are defined for signal input > 5% of range.
[9]
For 5 A and 10 A ranges, the frequency is verified for less than 5 kHz.
174
U1253A User's and Service Guide
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