TB 9-6625-2304-35
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Set AN/GSM-286, 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 exceed the
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.
usage accessories, issued as indicated in paragraph 4 above and are not listed in this
calibration procedure. The following peculiar accessories are also required for this
calibration: 6 each, banana-to-pin adapters; Dc power supply, model LR-10 (LR-10).
Manufacturer and model
Common name
Minimum use specifications
(part number)
CALIBRATOR
Dc voltage output: 1.0 V
Fluke, Model 5720A (p/o MIS-
Accuracy:
35947)
1
Dc current output: 1.0 A
Accuracy:2
Ac voltage capability:
Output: 1.0 V
Frequency: 25 Hz to 750 kHz
Hewlett-Packard, Model 3458A
MULTIMETER
Dc voltage:
(3458A)
Range: 6.0 mV to 18 V
Accuracy: (%)
Input:
6.0 mV1
10 to 60 mV2
90 mV to 9.0 V: .016
18 V: .0056
Ac voltage:
Range: 1.0 V and 10 V
Frequency: 20 kHz
Accuracy: 0.03%.
Range: 100 Ω to 1.0 MΩ
Accuracy: 0.0025%
Frequency measurement:
Range: 20 kHz
Accuracy: 0.25%
1Combined
accuracy of calibrator (1.0 V dc) and multimeter (6.0 mV dc, nominal) is +.025%.
2Combined
accuracy of calibrator (dc current) and multimeter (10 to 60 mV dc) is 0.125%.
