TB 9-4931-405-40
EQUIPMENT REQUIREMENTS
4. Equipment Required. Table 2 identifies the specific equipment to be used in this
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
specifications listed in table 2. The accuracies listed in table 2 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
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
Range: 10 A to 20 A dc
Fluke, Model 5720A (5720A) (p/o
CALIBRATOR
MIS-35947); w amplifier, Fluke
Accuracy: Nominal
5725A/AR (5725A/AR)
DC POWER SUPPLY
Range: 20 A dc
Elgar, Model DCS40-30EM1-2
Accuracy: Nominal
(13589313)
DC REFERENCE STANDARD
Range: 10 V dc
Fluke, Model 732A (732A)
Accuracy: Test report
Agilent, Model 3458A (3458A)
Range: 20 to 100 mV dc
1
Accuracy:
A
General Radio, Type 1444A
STANDARD RESISTOR NO. 1
Range: 10 k
(MIS-10400)
ccuracy: Test report
Aange: 1
STANDARD RESISTOR NO. 2
Leeds & Northrup, Model 4020B
R
ccuracy:1
(8616289)
Aange: 10
Leeds & Northrup, Model 4025B
STANDARD RESISTOR NO. 3
R
1
8616290)
ccuracy:
Aange: 100
STANDARD RESISTOR NO. 4
Leeds & Northrup, Model 4030B
R
ccuracy:1
8616291)
A
Leeds & Northrup, Model 4035B
STANDARD RESISTOR NO. 5
Range: 1000
1
(8616292)
ccuracy:
A
Leeds & Northrup, Model 4040B
STANDARD RESISTOR NO. 6
Range: 10000
ccuracy:1
(8616293)
Aange: 0.1
STANDARD RESISTOR NO. 7
Leads & Northrup, Model 4221B
R
1
(8616294)
ccuracy:
A
Biddle Grey, Model 601235
STANDARD RESISTOR NO. 8
Range: 0.01
ccuracy:1
7902994)
Aange: 0.001
Biddle Grey, Model 601240
STANDARD RESISTOR NO. 9
R
1
(7902993)
ccuracy:
accuracy of multimeter and standard resistors No. 2 through No. 9 is 0.0025%.
1Combined