TB 9-6625-1976-35
EQUIPMENT REQUIREMENTS
4. Equipment
Required. Table 2
identifies the
specific equipment to be
used in this
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-287, AN/GSM-705, and Secondary Reference Calibration
Standards Set NSN 4931-00-621-7878. Alternate items may be used by the calibrating
activity. The item 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 four-to-one
accuracy will be listed, and 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)
Fluke Model 5790A
Range: 1 to 1000V
AC MEASUREMENT STD
(13534003)
Accuracy: 0.0055% ( 0.01%)
(MEASUREMENT STD)
AUDIO ANALYZER
Range: 20 Hz to 50 kHz
Boonton, Model 1121 (1121)
Accuracy: Measure less than .041% distortion
CALIBRATOR 1
Ac voltage:
Fluke, Model 5720A (5700A/EP)
Range: 1.0 to 1000 V
(p/o MIS-35947);
w amplifier,
Frequency: 20 Hz to 1 MHz
Fluke 5725A/AR (5725A/AR)
Accuracy: .03 to .31%
Fluke, Model PM6681/656
FREQUENCY COUNTER
Range: 49.4 Hz to 1.033 MHz
(PM6681/656)
Accuracy: 0.25%
Ac voltage:
Hewlett-Packard, Model 3458A
Range: 100 V to 700 V ac
(3458A)
Accuracy: (Used as null meter)
Dc voltage:
Range: 0 to 200 V dc
Accuracy: 0.017%
ESI, Model DT72A (7915908)
Range: 0 to 1.000000
Frequency: 1 kHz
Accuracy: 0.0075%
Range: 20 Ω to 200 Ω
Biddle-Gray, Model 71-631
(7910328)
John Fluke, Model 8922A/AA
Range: 0.001 to 11 V
(8922A/AA)
Accuracy: 2.5%
1Transfer
level requirement only.