TB 9-6625-121-24
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286; AN/GSM-287; or AN/GSM-440. 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 parentheses.
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.
Manufacturer and model
Common name
Minimum use specifications
(part number)
Fluke, Model 5720A (5720A) (p/o
CALIBRATOR
DC voltage:
Range: 0 to 900 V
MIS-35947); w/ amplifier, Fluke
Accuracy: 0.025%
5725A/AR (5725A/AR)
AC voltage:
Range: 0 to 900 V
Frequency: 45 Hz to 500 Hz
Accuracy: 0.175%
DC Current: Range:0 to 0.9 A
Accuracy:0.0125%
AC Current: Range: 0 to 0.9 A
Frequency: 45 Hz to 2 kHz
Accuracy: 0.25%
Range: 0 to 19 MΩ
Accuracy: 0.05%
FUNCTION
Agilent, Model 33250A (33250A)
Range 10 Hz to 19 kHz
Accuracy: 0.0025%
Agilent, Model 3458A (3458A)
Range: 0 to 20 mA dc
Accuracy: 0.0125%
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.