TB 9-4920-454-24
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)
AUDIO ANALYZER
Range: 1 V ac
Boonton, Model 1121 (1121)
Frequency: 63 to 77 Hz
Accuracy: 0.25%
CALIBRATOR
Range: 0 mV to 10 V dc
Fluke, Model 5720A (5720A) (p/o
Accuracy: 0.003%
MIS-35947)
Range: 20 mV, 70 Hz
Accuracy: 3.0%
FREQUENCY COUNTER
Range: 103 ms to 15.873 ms
Fluke, Model PM6681/656
Accuracy: 0.033%
(PM6681/656)
Range: 0 to 1000 V dc
Hewlett-Packard, Model 3458A
Accuracy: 0.07%
(3458A)
Range: 14 to 100 s
Agilent, OS303/G (OS303/G)
Accuracy: 3.0%
A
RESISTANCE STANDARD
Biddle Gray, Model 71-650
Range: 4.21 to 22
(71-650)
ccuracy: 0.03%
Aange: 10 k and 100 k
R
ccuracy: +2.5%
Range: 70 to 85 oF
THERMOMETER
Azonix, Model A1012 (MIS38958)
oF
Accuracy: 1.0
CALIBRATION PROCESS
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 bulletin before beginning the
calibration.
b. Items of equipment used in this procedure are referenced within the text by common
name as listed in table 2.
c. Unless otherwise specified, verify the results 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 and TM 55-4920-401-13&P
for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
