TB 9-6685-383-40
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Reference Calibration
Standards Set, NSN 4931-00-621-7878. 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 exceed the minimum use
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)
CALIBRATOR
DC volts:
Fluke, Model 5720A (5720A) (p/o
Range: 0 to 50 V
MIS-35947); w/ amplifier, Fluke
Accuracy: 7.5 ppm
5725A/AR (5725A/AR)
DC current:
Range: 0 to 55 mA
Accuracy: 37.5 ppm
Dc voltage:
Hewlett Packard, Model 3458A
Range: 0 to 10.0 V dc
(3458A)
Accuracy: 0.025%
Range: 0 to 24.0 V dc
Accuracy: 1.25%
DC current:
Range: 0 to 24 mA
Accuracy: 0.0125%
PISTON GAGE 1
Range:
0.02 kPa to 380 kPa
Fluke, Model PG7601-AMH-RPM4-
Accuracy: 0.2 Pa + 12 ppm
AD
PISTON GAGE 2
Range:
0.04 MPa to 20 MPa
Fluke, Model PG7202-AMH-515
Accuracy: 3 Pa + 20 ppm
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.
