TB 9-6625-2265-35
Table 1. Calibration Description - Continued
Test instrument
Performance specifications
parameters
(3 1/2 digit display)
Dc current
Range: 0 to 10 A (in 6 ranges)
Accuracy: (% of reading + digits)
Range:
200 A to 2A .................................................
.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
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-286. 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 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 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:
John Fluke, Model 5700A/CT
Range: -190 mV to 1000 V
(p/o MIS-35947) w/power
Accuracy: (%) 190 mV to 190 V .............. .039
amplifier, John Fluke, Model
1000 V ................................ .050
5725A (5725A) w'ac divider,
Ac voltage:
John Fluke, Model 7405A-2407
Range: 190 mV to 750 V
(7405A-4207)
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