MIL-PRF-10304/14D
REQUIREMENTS:
(Readings expressed as a percent of full-scale value.)
Dimensions and configuration: See figure 1.
Full-scale ranges: See table I.
Scale:
Length: 2 inches minimum.
Pointer deflection: 90° minimum.
Position influence: ±2 percent change of 60° rotation from normal operating position.
Accuracy: ±2 percent.
Overshoot: 67 percent maximum .
Response time: 2.5 seconds maximum.
Power consumption (loss) (at end scale deflection):
Self-contained 60-Hz ammeters at 60 Hz: 1 VA maximum.
Self-contained 400-Hz ammeters at 400 Hz: 2 VA maximum.
Self-contained 800-Hz ammeters at 800 Hz: 3.5 VA maximum.
Frequency range (±2 percent change):
Nominal frequency
Extreme range
60-Hz voltmeters (AC)
25-125 Hz
400-Hz voltmeters (AF)
360-440 Hz
800-Hz voltmeters (AE)
720-880 Hz
High temperature cycling:
±2 percent.
±2 percent permanent change.
Temperature influence: ±0.5 percent change.
Exposure to extreme temperatures: ±3 percent permanent change.
Overload capacity:
Momentary overload: ±2 percent permanent change.
Sustained overload:
±1 percent temporary zero shift.
±1 percent permanent zero shift.
±2 percent permanent change.
Dielectric withstanding voltage: 3,000 volts rms.
TABLE I. Full-scale ranges.
Milliamperes (AC, AE, AF)
Amperes (AC, AE, AF)
10
100
1
10
300
20
200
2
20
1/ 500
30
300
5
30
1/ 800
50
500
50
1/ 1000
1/ Used with external transformer. Current through
meter at full-scale deflection shall be 5 amperes.
2