TB 9-6625-2253-24
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer calibration
Standards Set AN/GSM-286, AN/GSM-287 and 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.
5. Accessories Required. The accessories required for this calibration are common
usage accessories issued as indicated in 4 above, and are not listed in this calibration
procedure.
Table 2. Minimum Specifications of Equipment Required
Minimum use
Manufacturer and model
Common name
specifications
(part number)
CALIBRATOR
Dc voltage:
Fluke, Model 5720A (5720A) (p/o
Range: 190 mV to 1000 V
MIS-35947); w amplifier, Fluke
5725A/AR (5725A/AR)
Accuracy: r0.039%
Dc current:
Range: 1.9 mA to 1.9 A
Accuracy: r.2%
Ac voltage
Range: 190 mV to 750V
Frequency: 45 Hz to 5 kHz
Accuracy: r0.214%
Range: 190: to 10 M:
Accuracy: r0.039%
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 result 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 manufacturers' manuals for this TI.
