Keysight Technologies 34959A Service Manual page 53

The 50 kHz ac voltage test points may fail performance verification if the DMM
NOTE
internal shields have been removed and reinstalled. See
page 57 for further information on how to recalibrate the ac voltage function.
AC CURRENT Gain Verification Test
Configuration: AC Current
1 Make sure you have read
2 Set the AC CURRENT function and the 3 Hz input filter. With the slow filter
3 Select each range in the order shown below. Provide the input current and
Input
Current Frequency
[1]
1 kHz
10 mA
[1]
1 kHz
100 mA
10 mA 1 kHz
[1]
1 kHz
1A
[1] Verify only, no adjustment.
Q: Quick performance verification test points.
Keysight 34980A Service Guide
CONFigure:CURRent:AC
LF 3 HZ:SLOW
[SENSe:]CURRent:AC:BANDwidth 3
selected, each measurement takes 7 seconds to complete.
frequency indicated. Compare measurement results to the appropriate test
limits shown in the table. (Be certain to allow for appropriate source settling.)
Range
10 mA
100 mA
1 A
1 A
"DMM Test Considerations"
Quick
Check
24 hour
± 14 µA
Q ± 600 µA
± 1.41 mA
± 1.4 mA
Calibration Procedures
"Gain Adjustment"
on page 48.
Error from Nominal
90 day
± 14 µA
± 600 µA
± 1.41 mA
± 1.4 mA
3
on
1 year
± 14 µA
± 600 µA
± 1.41 mA
± 1.4 mA
53