TB 9-4920-359-24
Table 1. Calibration Description - Continued
Test instrument parameters
Performance specifications
Underfrequency circuit
Low frequency
Range:
1095 Hz
Accuracy:
r10 Hz
High frequency
Range:
1155 Hz
Accuracy:
r10 Hz
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Sets AN/GSM-286; AN/GSM-287; or 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
provide a four-to-one ratio between the standard and TI. Where the four-to-one ratio
cannot be met, the 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 Supply, Sorensen Model DCS 40-30; and Power Amplifier, CPD
Engineering Model 97717.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
CALIBRATOR
Range:
1 V ac at 396 to 1200 Hz
Fluke, Model 5720A (5700A) (p/o MIS-
30 V dc
35947); w amplifier, Fluke 5725A/AR
(5725A/AR)
Accuracy: ac r0.4%,
dc r1.0%
Freq Accuracy: r0.25%
Range:
0 to 5 A dc
Accuracy: r0.05 A dc
FREQUENCY
Range: 100 ms to 5.5 s;
Fluke, Model PM6681/656
COUNTER
(PM6681/656)
Accuracy: r0.02%
Range: 10 to 117 V ac
Hewlett-Packard, Model 3458A (3458A)
14 to 22 VRMS
8 mV to 28 V dc;
Accuracy: r0.33% ac
r1% dc
Frequency:400 to 1165 Hz
Accuracy: r0.23%
Range: 20 to 30 V P - P
Agilent, OS-303/G (OS-303/G)
Accuracy: r 3%
Frequency:1085 to 1165 Hz
Accuracy: r0.23%
Biddle-Gray, Model 71-631 (7910328)
Range: 1.1 to 3.3 k:
STANDARD
Accuracy: r0.75%