Performance Test 4
Keysight U3402A User’s and Service Guide 77
Recommended Test Equipment
The test equipments recommended for the performance verification procedures 
are listed below. If the exact instrument is not available, substitute calibration 
standards of equivalent accuracy.
A suggested alternate method would be to use the Keysight 3458A 8½ -digit 
digital multimeter to measure less accurate yet stable sources. The output value 
measured from the source can be entered into the instrument as the target 
calibration value.
Table 4-1 Recommended test equipments
Application Recommended equipment
Recommended accuracy 
requirements
Zero calibration
Shorting plug — Dual banana plug with copper wire short 
between the two terminals
—
DC voltage Fluke 5520A <1/5 instrument 1 year spec
DC current Fluke 5520A <1/5 instrument 1 year spec
Resistance Fluke 5520A <1/5 instrument 1 year spec
AC voltage Fluke 5520A <1/5 instrument 1 year spec
AC current Fluke 5520A <1/5 instrument 1 year spec
Frequency Fluke 5520A <1/5 instrument 1 year spec
Diode Fluke 5520A <1/5 instrument 1 year spec