TB 9-6625-1062-24
(3) To adjust the high range, adjust C2 HIGH RANGE (fig. 1) using method
provided in (1) and (2) above.
Figure 1. 1422D adjustments.
(4) Repeat 8 (a) (13) and (24) through (33) above until no adjustment is required.
NOTE
Adjustments of C1 or C2 cancels historical drift rate data and
tolerance criteria referenced in previous test report. After
adjustments, drift rate data and tolerance criteria will be
referred to the nominal value set above and a new test report
prepared. When a new test report is prepared, the date should
be noted.
9. Calibration Test Report. A calibration test report is required for the General Radio,
Types 1401 series, 1409 series, 722 series, 1422-D, 1422 CB, 1422CD, 1422CL and Arco,
Model SS-32 capacitors.
a. Instruments whose value has drifted outside manufacturer's specifications when
referenced to nominal values, yet the drift rate is sufficiently low to allow use within
manufacturer's specified accuracy of the previous test report value.
b. Instruments that have values and stability better than the manufacturer's
specifications may be utilized at greater accuracies when test report values are used.
The performance specifications will be ascertained by referencing present measured values
to previous measured values in lieu of present to nominal values. If present measured
values are not within manufacturer's accuracy specification of last measured value, the TI
must be red-tagged. Calibration activities will maintain a case history file of test reports
for the TI. The file will contain an accumulation of at least six of the most recent test
reports. If in four successive calibrations the measured value drifts from the nominal value
as much as three times the manufacturer's accuracy specification, the instrument must be
red-tagged. An example of calibration data to be annotated on the test report is shown on
the sample calibration test report (See appendix A).