TB 9-6625-2193-24
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286, AN/GSM-287; or AN/GSM-705. 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 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
calibration procedure.
Table 2. Minimum Specifications of Equipment Required
Manufacturer and model
Common name
Minimum use specifications
(part number)
CALIBRATOR
Ac voltage:
Fluke, Model 5720A (5700A/EP)
Range: 3.16 mV to 300 V
(p/o MIS-35947); w/amplifier
Frequency: 20 Hz to 1 MHz
Fluke, 5725A/AR (5725A/AR)
(%)
Accuracy:
Frequency:
20 Hz, 100 kHz & 500 kHz...1.25
1 and 50 kHz......................0.75
1 MHz...............................2.50
Wideband voltage:
Voltage: 316 V to 3.0 V
Frequency: 500 kHz to 20 MHz
(1 kHz reference)
(%)
Amplitude flatness:
Frequency: 500 kHz ............1.25
5 MHz................2.50
20 MHz............... 3.75
Range: 4.9 to 15 V dc
Fluke, Model 8840A/AF05
Accuracy: 3.3 %
(AN/GSM-64D)
RATIO TRANSFORMER
ESI DT72A
Range: 0.001
(7915908)
Frequency:50 Hz, 1 kHz
Accuracy:1
Combined accuracy of calibrator and ratio transformer for 100 V and 316.2 V at 50 Hz and 1 kHz output is
0.75%.
1