Equipment Required; Testrecord; Calibration Cycle; Accuracy Checks - HP 4262A Operating And Service Manual

Model 4262A
Section IV
Paragraphs 4-1 to 4-8
SECTION 1V
PERFORMANCE TESTS
4-1. INTRODUCTION.
4-2. This section provides the check procedures
to verify the 4262A specifications listed in
Table 1-1. All tests can be performed without ac-
cess to the interior of the instrument. A simpler
operational test is presented in Section III under
Self Test (paragraph 3-5). The performance
test procedures in this section can also be used to
do an incoming inspection of the instrument and
to verify whether the instrument meets its speci-
fied performance after troubleshooting or making
adjustments. If specifications are found to be out
of limits, check that controls are properly set, and
then proceed to adjustments or troubleshooting.
Note
Allow a 15-minute warm-up and
stabilization period before conduct-
ing any performance test.
4-3. EQUIPMENT REQUIRED.
4-4. Equipment required for the performance tests
is listed in Table 1-4 Recommended Test Equip-
ment in Section I. Any equipment whose
characteristics equal the critical specifications given
in the table may be substituted for the recom-
mended model(s).
Accuracy checks in this section use standard
LCR components as the samples to be connected
to the 4262A. Accessories 16361A and 16362A
can be utilized for this purpose. These accessory
models are DUT (device under test) boxes from
which the desired component can be selected and
connected to the 4262A through cables by use of a
rotary switch. If models 16361A/16362A are
unavailable, use the discrete components rec-
ommended in Table 4-1.
Note
All components used as standards
should be calibrated by an instru-
ment whose specifications are
traceable to NBS, PTB, LNE, NRC,
JEMIC, or equivalent standards
group; or all components should be
calibrated directly by an authorized
calibration organization such as
NBS. The calibration cycle should
be determined by the stability spec-
ification for each component.
45. TEST RECORD.
4-6. Results of the performance tests may be tabu-
lated on the Test Record at the end of these proce-
dures. The Test Record lists all the tested specifica-
tions and their acceptable limits. Test results re-
corded at incoming inspection can be used for
comparison in periodic maintenance and trouble-
shooting and after repairs or adjustments.
4-7. CALIBRATION CYCLE.
4-8. This instrument requires periodic verification
of performance. Depending on the use and envir-
onmental conditions, the instrument should be
checked with the following performance tests at
least once every year. To maximize the "up time"
of the instrument, the recommended preventive
maintenance frequency for the 4262A is twice a
year.
4-1