Service manual

4
Verification Tests
Introduction The three levels of test procedures described in this chapter are used to
verify that the Agilent E1326B multimeter:
• is fully functional (Functional Verification)
• meets selected testable specifications (Operation Verification)
• meets all testable specifications (Performance Verification)
WARNING
Do not perform any of the following verification tests unless you
are a qualified, service-trained person and have read the
WARNINGS and CAUTIONS in Chapter 1.
Test Conditions/
Procedures
For valid tests, all test equipment and the multimeter must have a one
hour warmup, the line voltage must be 115/230 Vac ± 10%, and
multimeter Auto Zero must be set. See Table 1-1, Recommended Test
Equipment for test equipment requirements.
For best test accuracy, the ambient temperature of the test area should
be between 18
°C and 28°C and stable to within ± 1°C. You should
perform the Performance Verification tests at least once a year. For
heavy use or severe operating environments, perform the tests more
often.
The verification tests assume the person performing the tests
understands how to operate the mainframe, multimeter and specified
test equipment. The test procedures do not specify equipment settings
for test equipment, except in general terms. It is assumed a qualified,
service-trained person will select and connect the cables, adapters, and
probes required for the test.
Performance Test
Record
Table 4-1, Agilent E1326B Performance Test Record, at the end of this
chapter provides space to enter the results of each Performance
Verification test and to compare the results with the upper and lower
limits for the test. You can make a copy of this form, if desired.
Verification Tests 4-1