Gain Verification; Gain Verification Procedure; Table 3-1 Table - Keysight Technologies 34420A Service Manual

3 Calibration Procedures

Gain Verification

This procedure is used to check the "full scale" reading calibration of the meter.
Verification checks are only performed for those functions, channels, and ranges
with unique gain calibration constants.

Gain Verification Procedure

1 Set the meter to the following configuration:
2 Read
3 Connect a multifunction calibrator to the meter's input terminals using the low
4 Allow 5 minutes for the input connections to temperature stabilize.
5 Select each function and range on the meter in the order shown in the table on
The 1 mV and 10 mV gain verification is an optional verification test (see
NOTE
page
and 1OV range calibrations.
Table 3-2 Gain Verification Procedure
Step# Calibrator Output
1
2
Q 3
84
7 ½ digits (100 PLC)
Filters OFF
"Test Considerations"
thermal input cable provided (Keysight PN 34102A). Ensure the connector
coupling nut is properly tightened.
the next page. At each function and range apply a full scale (input with the
multifunction calibrator. Compare each measurement result to the test limits
shown in the table.
86). These range gains are internally derived from the 1OOmV, 1V,
Function/Channel
100mV Voltage/ Channel 1
1 V Voltage/ Channel 1
10 V Voltage/ Channel 1
on page 78.
± Error From Full Scale
Range 24 hours
100 mV 1.8 µV
1 V 13 µV
10 V 30 µV
Keysight 34420A Service Guide
90day 1 year
3.4 µV 4.4 µV
29 µV 39 µV
240 µV 340 µV