TB 9-6625-2321-24
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 required for this calibration:
AN/PSM-95 or AN/PSM-95A and current shunt, National Instruments CSM-200ma (part of TI).
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
CALIBRATOR
Range: 0.200 V dc to 200 V dc
Fluke, Model 5720A (5720A)
Accuracy: 0.25%
(p/o MIS-35947); w/amplifier,
Fluke 5725A/AR (5725A/AR)
Range: 0.200 V ac to 200 V ac
Accuracy: 0.75%
Frequency: 1000 Hz
A
Range: 0 to 20 M
ccuracy: 0.25%
Range: 20 to 200 mA dc
Accuracy: 0.25%
Range: 20 to 200 mA ac
Accuracy: 0.75%
Frequency: 1000 Hz
CALIBRATION PROCESS
6. Preliminary Instructions
a. The instructions outlined in paragraph 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.