METREL CS 2890, Инструкция по эксплуатации

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CS 2890 Power Simulator / Calibrator Operating the instrument
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6.1.6 Calibration of current inputs for Class A PQA (MI 2892 example)
Reference

value from the CS 2890
UUC

indicated value on the calibration item (MI 2892)
Uncertainty

expanded measurement uncertainty (k=2)
Error

UUC
– Reference
Limit

limit of error (
±), for MI 2892 ±0.25%
UUC set-up: Voltage ratio 1:1, Connection: 4W, Synchronisation: I1, System frequency:
50 Hz, Primary current: 5A, Secondary current: 5A
Reference Frequency UUC Uncertainty Error Limit
Range=100A
Input mV Hz A A A A
I1 50 50 49.98 0.02 0.02 0.13

I2 50 50 50.01 0.02 -0.01 0.13

I3 50 50 50.02 0.02 -0.02 0.13

N 50 50 50.07 0.02 -0.07 0.13


I1 100 50 99.96 0.03 0.04 0.25

I2 100 50 99.95 0.03 0.05 0.25

I3 100 50 100.0 0.03 0 0.25

N 100 50 100.1 0.03 -0.1 0.25


I1 200 50 199.9 0.06 0.1 0.5

I2 200 50 199.9 0.06 0.1 0.5

I3 200 50 200.0 0.06 0 0.5

N 200 50 200.1 0.06 -0.1 0.5


Range=1000A
I1 50 50 49.99 0.03 0.01 0.13

I2 50 50 50.01 0.03 -0.01 0.13

I3 50 50 50.02 0.03 -0.02 0.13

N 50 50 50.06 0.03 -0.06 0.13


I1 1000 50 1000.0 0.14 0 2.5

I2 1000 50 999.9 0.14 0.1 2.5

I3 1000 50 1000.0 0.14 0 2.5

N 1000 50 1001.0 0.14 -1 2.5


I1 2000 50 2001 1 -1 5

I2 2000 50 2000 1 0 5

I3 2000 50 2000 1 0 5

N 2000 50 2001 1 -1 5

Table 41: MI 2892 current calibration performed with CS 2890 (Uncertainty based
on substandard Volt-meter Keysight 34461)