TB 9-6625-2057-24
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set 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 the
calibration procedure. The following peculiar accessory is also required for this calibration:
Voltage Divider, 11047A (7911560).
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
Boonton, Model 1121
AUDIO ANALYZER
Range: 5 Hz to 600 kHz
(1121)
Accuracy: 0.25%
Distortion: <-60dB
AUTOTRANSFORMER
Range: 105 to 125 V ac
Ridge, Model 9020A
Accuracy: 1%
(9020A)
CALIBRATOR
Range: 0 to 2.625 V dc
Fluke, Model 5720A (5700A/EP)
(p/o MIS-35947)
Accuracy:
0.01%
FREQUENCY COUNTER
Range: 4.85 Hz to 1.236 MHz
Fluke, Model PM6681/656
Accuracy: 0.75%
(PM6681/656)
Range:
0 to 2.5 V ac
Fluke, Model 8840A/AF05
0 to 2 V dc
(AN/GSM-64D)
Accuracy: 1%
Ballantine, Model 1395-3
THERMAL CONVERTER
Range: 5 Hz to 1.2 MHz
(7913198-1)
at 0.97 to 1.05 V
Accuracy: 0.25% 5 to 100 Hz
0.125% (0.5%)
100 Hz to 300 kHz
0.25% (0.6%)
300 kHz to 1.2 MHz
