1
Calibration Procedures
30
Keysight U1241C/U1242C Service Guide
Table 1-7
AC current (A) true rms performance verification tests
Test function
Range
5520A/5522A
output
Error from nominal 1 year
U1241C
U1242C
AC current (A) true rms
Turn the rotary switch to the
position and press
.
1000
μ
A
1000
μ
A, 40 Hz
±10.3
μ
A
±10.3
μ
A
1000
μ
A, 1 kHz
±10.3
μ
A
±10.3
μ
A
10 mA
10 mA, 40 Hz
±0.103 mA
±0.103 mA
10 mA, 1 kHz
±0.103 mA
±0.103 mA
100 mA
100 mA, 40 Hz
±1.03 mA
±1.03 mA
100 mA, 1 kHz
±1.03 mA
±1.03 mA
440 mA
[a]
440 mA, 40 Hz
±4.7 mA
±4.7 mA
440 mA, 1 kHz
±4.7 mA
±4.7 mA
10 A
[b]
10 A, 45 Hz
±0.125 A
±0.125 A
10 A, 1 kHz
±0.125 A
±0.125 A
[a] 440 mA continuous, and the signal greater than 440 mA ~ 600 mA for 20 hours maximum. After measuring current of >440 mA, cool down the
multimeter for the same measuring time you applied before performing low current measurement.
[b] 10 A continuous, and the signal greater than 10 A ~ 19.999 A for 30 seconds maximum. After measuring current of >10 A, cool down the
multimeter for the same measuring time you applied before performing low current measurement.
A
Shift
Esc
View
CAUTION
Connect the calibrator outputs to the multimeter’s A and COM terminals
before applying 10 A.