Keysight Technologies 34959A Service Manual page 50

3 Calibration Procedures
Input
Function
Short
Short
Short
2-Wire
Short
Ohms
4-Wire Ohms
Short
Short
Short
[1] Select 6½ digit resolution.
[2] For 2-wire ohms using a multiplexer for the input connections, an additional 4 of error for the relay contacts must be added.
Q: Quick performance verification test points.
Zero offset calibration using a multifunction calibrator is NOT recommended.
NOTE
The calibrator and cabling offset can be large and unstable causing poor offset
calibration of the internal DMM.
Gain Verification
This procedure is used to check the "full scale" reading accuracy of the internal
DMM. Verification checks are performed only for those functions and ranges with
unique gain calibration constants.
DC VOLTS, Resistance, and DC CURRENT Gain Verification Test
1 Make sure you have read
2 Select each function and range in the order shown below. Provide the input
3 Make a measurement and return the result. Compare measurement results to
50
[1]
Range
100 
1 k
10 k
[2]
100 k
and
1 M
10 M
100 M
shown in the table below.
the appropriate test limits shown in the table. (Be certain to allow for
appropriate source settling when using the Fluke 5700A.)
Error from Nominal
Quick
Check
24 hour
± 3.5 m
± 6 m
Q ± 50 m
± 500 m
± 10 
± 100 
± 10 k
"DMM Test Considerations"
90 day
± 4 m
± 10 m
± 100 m
± 1 
± 10 
± 100 
± 10 k
on page 48.
Keysight 34980A Service Guide
1 year
± 4 m
± 10 m
± 100 m
± 1 
± 10 
± 100 
± 10 k