Calibration Procedures 3
Keysight 34420A Service Guide 79
Performance Verification Tests
The performance verification tests use the meter's specifications listed in
datasheet.
You can perform four different levels of performance verification tests:
– Self-Test A series of internal verification tests that give a high confidence that
the meter is operational.
– Quick Verification A combination of the internal self-tests and selected
verification tests.
– Performance Verification Tests An extensive set of tests that are
recommended as an acceptance test when you first receive the meter or aft.er
performing adjustments.
– Optional Verification Tests Tests not performed with every calibration.
Perform these tests to verify additional specifications or functions of the meter.
Self-Test
A brief power-on self-test occurs automatically whenever you turn on the meter.
This limited test assures that the meter is capable of operation.
To perform a complete self-test hold down the key as you press the Power
switch to turn on the meter; hold down the key for more than 5 seconds (a
complete description of these tests can be found in chapter 6). The meter will
automatically perform the complete self-test procedure when you release the key.
The self-test will complete in approximately 10 seconds.
You can perform many tests individually (or all tests at once) using the TEST
command in the SYS MENU. You can also perform a self-test from the remote
interface. See Chapter 4 in the Keysight 34420A User's Guide.
– If the self-test is successful, “PASS” is displayed on the front panel.
– If the self-test fails, “FAIL” is displayed and the ERROR annunciator turns on. If
repair is required, see Chapter 5, "Service" for further details.
– If all tests pass, you have a high confidence (90%) that the meter is
operational.
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