HP 8924E, Assembly

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Chapter 1, Introduction
Calibration and Performance Verification
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Calibration and Performance Verification
The Test Set periodically requires some maintenance to verify that it meets its
published specifications. Periodic Adjustments (calibration) consists of running
several built-in calibration programs, and should be performed every year. An
external frequency counter and dc voltmeter are required. (See
chapter 4,
"Periodic Adjustments"
).
The Performance Verification tests in chapter 5 verify that the Test Set performs
as indicated in the Specifications. These tests should be performed if the Test
Set’s operation is suspect, even though it passes all internal diagnostic checks.
This identifies whether a problem actually exists in the Test Set, or if an
application problem exists outside of the Test Set.
Several assemblies, when replaced, require running specific periodic calibration
procedures to create calibration factors for that assembly. In other cases, the
calibration data will be included with the replacement assembly on a memory
card. Instructions that come with the replacement assembly explain how to
download the calibration data. (This is not considered part of periodic calibration.)
NOTE: When troubleshooting the Test Set, it is sometimes desirable to swap a known-good assembly
(perhaps from another Test Set) for a suspected-faulty assembly. If the swapped assembly
requires calibration data, most assemblies will operate well enough with the original
assembly’s calibration data to troubleshoot and run the diagnostics. However, do not expect
the Test Set to meet its specifications. Also, some assemblies may appear to fail because of the
incorrect calibration data.