TB 9-4931-393-24
5. Accessories Required. The accessories required for this calibration are common
usage accessories, issued as indicated in paragraph 4 above, and are not listed in this
calibration procedure.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
Range: 105 to 125 V ac
Ridge, Model 9020A
Accuracy: 1%
(9020A)
Range: 0.44699 to 30.05 V dc
Hewlett-Packard, Model
Accuracy: 0.0125%
3458A (3458A)
Range: 99.44 to 200.12 Ω
Accuracy: 0.015%
6. Preliminary Instructions
a. The instructions outlined in paragraphs 6 and 7 are preparatory to the calibration
process. Personnel should become familiar with the entire procedure before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within-the text by common
name and item identification number as listed in table 2.
c. Unless otherwise specified, verify the result of each test and, whenever the test
requirement is not met, take corrective action before continuing with the calibration.
Adjustments required to calibrate the TI are included in this procedure. Additional
maintenance information is contained in the manufacturer's manual for this TI.
d. When indications specified in paragraphs 8 and 9 are not within tolerance, perform
the power supply check prior to making adjustments. After adjustments are made, repeat
paragraphs 8 and 9. Do not perform power supply check if all other parameters are within
tolerance.
e. Unless otherwise specified, all controls and control settings refer to the TI.
HIGH VOLTAGE is used or exposed during the performance of
this calibration.
DEATH ON CONTACT may result if
personnel fail to observe safety precautions.
REDUCE
OUTPUT(S) to minimum after each step within the
performance check where applicable.
a. Set TI 115-230 V switch (rear panel) to 115 V.
b. Remove TI covers as required for access to connections and adjustments.