TB 9-6625-115-24
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 paragraph 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)
CALIBRATOR
Function: DCV
Fluke, Model 5720A (5720A)
Range:
10 V dc, 100 V dc, and 1000 V dc
(p/o MIS-35947)
1
Accuracy:
Function: DCV
Fluke, Model 8508A02
Range:
100 mV dc to 10 V dc
(8508A/02)
1
Accuracy:
Function: 4-wire resistance
1 MΩ
Range:
1
Accuracy:
1 MΩ
Range:
IET Labs, HARS-LX-9-0.001
STANDARD
Accuracy: See MULTIMETER
(HARS-LX-9-0.001)
RSS uncertainty of calibrator, multimeter measuring Ω and multimeter measuring VDC will not exceed 0.0025% for
1
1MΩ/step decade, 0.0075% for 10MΩ/step decade, 0.025% for 100MΩ/step decade and 0.05% for 1GΩ/step decade.
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 manufacturer's manual for this TI.
d. Unless otherwise specified, all controls and control settings refer to the TI.
