TB 55-4920-346-34
SECTION II
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. Alternate items may be used by
the calibrating activity when the equipment listed in table 2 is not available. 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.
5. Accessories Required. The accessories listed in table 3 are issued as indicated in paragraph 4 above and are used
in this calibration procedure. When necessary, these items may be substituted by equivalent items, unless specifically
prohibited.
Table 2. Minimum Specifications of Equipment Required
Minimum Use
Manufacturer and Model
Item
Common Name
Specifications
(Part Number)
A1
Signal
Range: 0-115 vac
Krohn Hite, Model 4100R
0-400 Hz
W/7500 Amplifier
A2
Range: 0-115 vac
Hewlett-Packard, Model 3490A
Accuracy: + 0.2%
Range: 0-90 Kohms
Accuracy: + 0.5%
A3
Electronic
Range: 0-1 KHz
Hewlett-Packard, Model 5345A
Counter
Accuracy: 0.25%
A4
Meter
Range: 0-600
John Fluke, Model 760
Calibrator
ma ac/dc
Accuracy: 0.5%
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