Calibration Procedures
1
Keysight U1281A/U1282A Service Guide
33
Table 1-10
AC current (
μ
A.mA) performance verification tests
Test function
Range
5520A/5522A
output
Error from nominal 1 year
U1281A
U1282A
AC current (
μ
A.mA)
Turn the rotary switch to the
position and press
.
600
μ
A
600
μ
A, 20 Hz
±6.40
μ
A
±6.40
μ
A
600
μ
A, 45 Hz
±3.85
μ
A
±3.85
μ
A
600
μ
A, 1 kHz
±3.85
μ
A
±3.85
μ
A
6 mA
6 mA, 20 Hz
±0.0640 mA ±0.0640 mA
6 mA, 45 Hz
±0.0385 mA ±0.0385 mA
6 mA, 1 kHz
±0.0385 mA ±0.0385 mA
60 mA
60 mA, 20 Hz
±0.640 mA
±0.640 mA
60 mA, 45 Hz
±0.385 mA
±0.385 mA
60 mA, 1 kHz
±0.385 mA
±0.385 mA
600 mA
[a]
440 mA, 20 Hz
±4.80 mA
±4.80 mA
440 mA, 45 Hz
±2.89 mA
±2.89 mA
440 mA, 1 kHz
±2.89 mA
±2.89 mA
[a] Current can be measured from 30 mA to 440 mA continuously, and > 440 mA to 600 mA for 20 hours maximum. DC ranging from 60 mA to
440 mA have a thermal effect of 0.35 µA/mA. Cool down the multimeter for 6 seconds if 100 mA is applied and at least 3 minutes if
600 mA is applied. Alternatively, use the Null (
) function to zero the thermal effect before proceeding with a low current measurement or
checking the current offset.
Table 1-11
Diode performance verification test
Test function
Range
5520A/5522A
output
Error from nominal 1 year
U1281A
U1282A
Diode
Turn the rotary switch to the
position.
3 V
1 V
±0.006 V
±0.006 V
mA
Esc
Shift
MHz