TB 9-6625-2265-24
Table 1. Calibration Description - Continued
Test instrument
parameters
Performance specifications (3 1/2 digit display)
Dc current
Range: 0 to 10 A (in 6 ranges)
Accuracy: (% of reading + digits)
Range:
200 A to 2A............................................
0.75 +
1
10 A .........................................................
1.5
+
1
Ac current 1
Range: 0 to 10 A (in 6 ranges)
Accuracy: (% of reading + digits)
Range
45 to 450 Hz
450 Hz to 1 kHz
200 A through 2 A
1.5 + 2
1.5 + 2
10 A
3.0 + 2
5.0 + 3
1Ac
current verified during dc current check since same shunt resistors are utilized for both functions.
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
Dc voltage:
Fluke, Model 5720A (p/o MIS-
Range: -190 mV to 1000 V
35947) w/power amplifier,
Fluke, Model 5725A (5725A)
Accuracy: (%) 190 mV to 190 V ............ 0.039
w/ac divider, Fluke, Model
1000 V ............................ 0.050
7405A-4207 (7405A-4207)
Ac voltage:
Range: 190 mV to 750 V
Frequency: 40 Hz to 5 kHz
Accuracy: (%)
Voltage
40 Hz and 1.0 kHz
190 mV through 190 V...... 0.211
2.0 kHz
190 mV through 190 V...... 0.421
5.0 kHz
190 mV through 19 V........ 1.316
50 Hz and 1.0 kHz
750 V.................................. 0.333
