Self-Test Verification - HP 54520 Series Service Manual

See Also
Testing Performance
The procedures in this section 'test the instrument's electrical performance using
Performance Specifications given in chapter 1 as performance standards.
Specifications applicable to individual tests are noted at the test for reference.
Testing Interval
The performance test procedures may be performed for incoming inspection of the
instrument and should be performed periodically thereafter to ensure and maintain
peak performance. The recommended test interval is yearly or every 2,000 hours of
operation. Amount of use, environmental conditions, and the user's experience
concerning need for testing will contribute to test requirements.
Chapter 4, "Calibrating and Adjusting," for information about the calibration cycle.
Equipment Required
A complete list of equipment required for the performance tests is in the
Recommended Test Equipment table in chapter 1. Equipment required for individual
tests is listed in the test. Any equipment satisfying the critical specifications listed
may be substituted for the recommended model. The procedures are based on the
model or part number recommended.
Self-Test Verification
To verify system operation with high confidence, without the test equipment and
time required for performance tests, perform the self-tests. These internal tests
verify many functions on the main assembly. The functions tested are the six
separate memories and six other system functions.
To start the self-tests, press Utility ,thenpress selftest menu. A message
is displayed with the instruction to remove all inputs to the instrument.
Press test all, which starts a loop which runs all the self-tests in succession.
During execution of the self-tests, the following messages are displayed as each
self-test is completed:
PASSED Display RAM PASSED Acquisition RAM
PASSED System RAM PASSED Logic Trigger
PASSED Non-Volatile RAM PASSED Analog Trigger
PASSED Protected Non-Volatile RAM PASSED Timebase
PASSED System ROM PASSED Time Tag
PASSED HP-IB PASSED D/A Converter
PASSED A/D Converter
If one of the self-tests fails, FAILED is displayed rather than PASSED, and a 16-bit
diagnostic code is displayed. This code is used by factory service personnel when
troubleshooting the main assembly. Failure of a self-test indicates a failure on the
main assembly which must be returned to the factory for service. For more
troubleshooting information, refer to chapter 5, "Troubleshooting."
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