Introduction; Verification Test Record - HP 75000 C Series Service Manual

Verification Tests
4-1.
Introduction
Three levels of test procedures are provided in this chapter, and are used
to verify that the HP E1426A Oscilloscope is:
fully functional (Functional Verification),
meeting critical specifications after a repair (Operation
Verification), or
meeting all published specifications (Performance
Verification).
Note
To consider the tests valid, the following conditions must be met:
The HP E1426A must have a 30 minute warm-up.
The line voltage must be 115/230 Vac *lo%.
For greatest accuracy, the temperature of the test area should
be between 18°C and 28°C and should be stable to within
f
1°C.
4-2.
Equipment
Required
4-3.
Test Record
4-4.
Calibration Cycle
Equipment required for the verification tests is listed in Table 1-1,
Recommended Test Equipment. Any equipment that satisfies the
critical specifications given in the table may be substituted.
Results of the verification tests may
be
tabulated in Table 4-1,
Verification Test Record. The Verification Test Record lists all of the
verification test specifications and the acceptable limits for each
specification. If verification test results are recorded during an
incoming inspection of the instrument, they can be used for comparison
during periodic maintenance or troubleshooting. The test results may
also prove useful in verifying operation after repairs are made.
This instrument requires periodic verification of performance to
ensure that it is operating within specified tolerances. The performance
verification tests described in this section should be performed a t least
once every six months
or
1,000 hours; under conditions of heavy usage
or severe operating environments, the tests should be more frequent.
Annual cleaning procedures are detailed in Chapter 3, Preventive
Maintenance.
Verification Tests 4-1