Power Meter Operation

Self Test

HP-IB Testing

To invoke the HP-IB self test, the IEEE 488.1 compliant standard command, *TST? is used. This command runs a full self test and returns one of the following codes:

•0 - no tests failed

•1 - one or more tests failed

The HP-IB self test consists of the following tests:

•ROM checksum

•RAM

•Battery

•Display Assembly

•Calibrator

•Measurement Assemblies

•Communications Assembly (Implicit)

The communications assembly is tested implicitly, in that the command will not be accepted or return a result unless the HP-IB interface is functioning correctly.

Refer to “Test Descriptions”, on page 2-54 if you require a description of each individual test.

When the *TST? command is executed, the screen is cleared. As each test takes place, the name of the test is listed on the screen. While a test is running, the message “Testing...” appears next to the name of the test. As each stage of the test is completed, the message “Testing...” is replaced by either the message “Passed” or “Failed”.

HP EPM-442A User’s Guide

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