TB 9-6625-1961-24
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Sets, AN/GSM-286, AN/GSM-287 and AN/GSM-705. Alternate items may be
used by the calibrating activity. The items selected must be verified to perform
satisfactorily prior to use and must bear evidence of current calibration. The equipment
must meet or exceed the minimum use specifications listed in table 2. The accuracies listed
in table 2 provide a four-to-one ratio between the standard and TI. Where the four-to-one
ratio cannot be met, actual accuracy of the equipment selected is shown in parenthesis.
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. The following peculiar accessories are also required for this
calibration: Power Module, Tektronix, model TM 503 (supplied with TI), and Precision
Cable, Tektronix, model 012-0482-00 (supplied with TI).
Table 2. Minimum Specifications of Equipment required
Manufacturer, model,
Common name
Minimum use specifications
and part number
AUTOTRANSFORMER
Range: 105 to 125 V ac
Ridge, Model 9020A
(9020A)
CALIBRATOR
Range: 0 to 2 V dc
Fluke, Model 5720A (5720A) (p/o MIS-
35947)
DC CURRENT SHUNT
Range: 0.1 A
Guildline, Model 9711 (7912323)
Accuracy: 0.1%
FREQUENCY COUNTER
Range: 952.38 to 1052.6 Hz
Fluke, Model PM6681/656
(PM6681/656)
Accuracy: 1.25%
Range: 20 mv; 108.7 V
Agilent, Model 3458A (3458A)
Range: 10 mV to 60 V p-p
Agilent, OS-303/G (OS-303/G)
Accuracy: 3%
Risetime: 1 ns
A
Biddle-Gray, Model 71-631
RESISTANCE STANDARD
Range: 1 M
(7910328)
ccuracy: 0.1%
CALIBRATION PROCESS
6. Preliminary Instructions
a. The instructions outlined in paragraphs 6 and 7 preparatory to the calibration
process. Personnel should become familiar with the entire bulletin 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.