TB 9-6625-1138-24
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 this
calibration procedure. The following peculiar accessory is also required for this calibration:
Voltage Divider, 600 , double banana plug to triple banana jack, Agilent, model 11047A
(7911560).
Table 2. Minimum Specifications of Equipment Required
Minimum use
Manufacturer and model
Common name
specifications
(part number)
AUTOTRANSFORMER Range: 105 to 125 V ac
Ridge, Model 9020A
Accuracy: 1%
(9020A)
CALIBRATOR
DC Range: 285 mV to 315 V
Fluke, Model 5720A (5720A) (p/o
Accuracy: 1%
MIS-35947); w amplifier, Fluke
5725A/AR (5725A/AR)
AC Range: 20 Hz to 50 KHz
Flatness: 1.25 %
Range: 14 to 51,000 Hz
Fluke, Model PM6681/656
Accuracy: 1%
COUNTER
(PM6681/656)
DC Range: -1 to -15.2 V
Fluke, Model 8840A/AF05
Accuracy: 0.33%
(AN/GSM-64D)
AC Range: 1 to 315 V
Accuracy: 1%
Range: 6.3 to 7.7 V p-p
Agilent, OS-303/G (OS-303/G)
Accuracy: 3%
RATIO
Range: 0.0001
ESI, Model DT72A
Accuracy: 0.1%
(7915908)
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.