TB 9-6625-1356-24
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286; AN/GSM-287; or AN/GSM-440. 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 parentheses.
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)
ATTENUATOR
Range: 0 to 80 dB
Agilent, Model 355D
(355D)
Accuracy: 0.05 dB (See Test Report
Values)
Range: 10 Hz to 100 kHz1
Boonton, Model 1121
AUDIO ANALYZER
Accuracy: <0.25% distortion
(1121)
AUTOTRANSFORMER
Range: 105 to 125 V ac
Ridge, Model 9020A
Accuracy: 1%
(9020A)
CALIBRATOR
Range: 2.40 to 2.60 V dc
Fluke, Model 5720A (5700A/EP)
Accuracy: 2%
(p/o MIS 35947); w amplifier,
Fluke 5725A/AR (5725A/AR)
FREQUENCY COUNTER
Range: 9.7 Hz to 10.3 MHz
Fluke, PM6681/656
Accuracy: 0.5%
(PM6681/656)
Agilent, Model 3458A (3458A)
Range: 7 mV to 30.9 V dc
100 mV to 3.2232 V ac
Accuracy: 1.5% dc 0.5% ac
Ballantine, Model 1395-3
THERMAL CONVERTER
Range: 10 Hz to 10 MHz
(7913198-1)
Accuracy: 0.25% to 100 kHz
0.5% to 1 MHz
0.6% to 10 MHz
TRUE RMS VOLTMETER
Range: 1 mV
Rohde and Schwarz, Model URE 3
Resolution: At least 2 V
(URE 3)
1
When certified between 10 Hz and 100 kHz, there is a sufficient confidence factor that distortion will be within tolerance up
to 10 MHz.
Change 1
