TB 9-6625-2190-24
Table 1. Calibration Description
Test instrument parameters
Performance specifications
Dc voltage
Range:
0 to 1000 V in 5 ranges (5000 V using high voltage probe)
(0.1% of reading + 1 digit)
Accuracy:
(1% of reading using high voltage probe)
Dc current
Range:
0 to 10 A in 5 ranges
(0.75% of reading + 2 digits)1
Accuracy:
Ac voltage
AN/PSM-45A (FLUKE 27/FM)
Range:
mV to 1000 V in 5 ranges
(1.5% of reading + 5 digits)
Accuracy: 20 Hz to 40 Hz;
(0.5% of reading + 5 digits)
40 Hz to 1 KHz;
(5% of reading + 5 digits)
1 KHz to 5 KHz;
27 and 27/AN
Range:
mV to 320 V
Accuracy: 40 Hz to 2 KHz
(0.5% of reading + 3 digits)
2 KHz to 10 KHz
(2% of reading + 3 digits)
10 KHz to 30KHz
(4% of reading + 10 digits)
Range:
1000 V
Accuracy:
40 Hz to 2 KHz
(1% of reading + 3 digits)
2 KHz to 10 KHz
(3% of reading + 3 digits)
Ac current2
Range:
0 to 10 A in 5 ranges
Accuracy:
AN/PSM-45A (FLUKE 27/FM)
(1.5% of reading + 5 digits)
0 - 320mA
40 Hz to 1 kHz
10A
40 Hz to 1 KHz
(2.5% of reading + 5 digits)
Accuracy:
27 & 27/AN
All ranges
40 Hz to 1 KHz
(1.5% of reading + 2 digits)
0 Ω to 32 MΩ in 6 ranges
Range:
Accuracy: 320 Ω range
(0.3% of reading + 2 digits)
AN/PSM-45A (FLUKE 27/FM)
3.2 KΩ to 3.2 MΩ ranges
(0.25% of reading + 1 digit)
32 MΩ range
(1% of reading + 1 digit)
Accuracy: 320 Ω range
27 & 27/AN
(0.3% of reading + 3 digits)
3.2 KΩ to 3.2 MΩ ranges
(0.2% of reading + 1 digit)
32 MΩ range
(1% of reading + 1 digit)
1
Specifications for AN/PSM-45A (FLUKE 27/FM) based on Army Specification procurement document.
2
Ac current verified by dc current check, current measurements of ac and dc are made using same internal shunt resistor.
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
CHANGE 1 3
