TB 9-6625-2232-24
Table 1. Calibration Description - Continued
Test instrument
Performance specifications
parameters
Ac voltage
Range: 0 to 700 V rms (in 4 ranges)
Accuracy: (% of reading + number of counts)3
Frequencies
20
to
30
Hz
0.402
+
656
30
Hz
to
20
kHz
0.122
+
856
20
to
50
kHz
0.222
+
1856
50
to
100
kHz
0.602
+
3056
100
to
250
kHz
5.052
+
6656
1AUTO
ZERO pushbutton on, FILTER off, and 10 PLC.
2AUTO
ZERO pushbutton on, FILTER off, 10 PLC, and 4 WR (add 0.2 offset for 2 WR measurements).
3AUTO ZERO pushbutton on, FILTER on, 10 PLC, >1% of FS, and dc component <10% of ac (for inputs
>500 V rms add 0.07% of reading). Frequencies >100 kHz are specified for 1 V and 10 V ranges only.
EQUIPMENT REQUIREMENTS
calibration procedure. This equipment is issued with Secondary Transfer Calibration
Standards Sets 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
exceed the minimum use specifications listed in table 2.
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)
Accuracy: ( %)
CALIBRATOR
Fluke, Model 5720A (5720A)
Dc voltage:
(p/o MIS-35947); w amplifier,
100 mV
0.0034
Fluke 5725A/AR (5725A/AR)
1
V
0.00265
10
V
0.002575
100 V
0.002675
1000 V
0.0056
Ac voltage range: 1 to 700 V
Frequency: 25 Hz to 250 kHz
Accuracy: ( %)
Frequency (kHz)
Ac voltage
0.025
1
45
95
250
1V
0.1169
0.0519
0.1019
0.2269
1.4294
10 V
0.1169
0.0519
0.1019
0.2269
1.4294
100 V
0.1169
0.0519
0.1019
0.2269
---
700 V
---
0.0786
0.1393
0.2771
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