MIL-PRF-10304/19E
Position influence: Not greater than ± 2 percent of full scale length for 60 degrees rotation from normal operating
position.
Initial Accuracy: Not to exceed the values shown in table I.
Overshoot: 10 percent maximum.
Response time: 0.5 second maximum at 1,000 Hz at the 0-dB scale position.
Effective resistance: 5,000 ohms minimum.
Frequency range: 25 to 10,000 Hz (the change in indication at scale points - 8, 0, + 8, + 12, and + 22 dB shall not
exceed the values shown in table II).
Special meter: Serial number 100.
Heat effect: At + 65 degrees C, to be not greater than shown in table III.
Temperature influence: Not greater than shown in table IV.
Exposure to extreme temperatures: Change in indication not to exceed the values shown in table V.
Sustained overload: Not to exceed the values shown in table VI.
╗
Vibration:
Random drop: ╠═ Permanent change in indication after each test shall not exceed the values shown in table VII.
╝
Shock:
Dielectric withstanding voltage: 1,500 volts rms, without damage or flashover.
TABLE I. Initial accuracies.
Equivalent voltage
with 1,000 Hz sine
Scale
Error
1/
wave
1/
1/
tolerance
Min-max point
position
Equivalent voltage
dB
Volts
dB
dB
Volts
-8
0.308
±7
- 15 to - 1
0.137 to 0.690
-2
0.615
±5
- 7 to + 3
0.346 to 1.094
0
0.775
±1
- 1 to + 1
0.690 to 0.869
+4
1.228
±2
+ 2 to + 6
0.975 to 1.542
+8
1.947
±2
+ 6 to + 10
1.543 to 2.449
+ 12
3.084
±2
+ 10 to + 14
2.449 to 3.885
+ 18
6.153
± 0.75
+ 17.25 to + 18.75
5.653 to 6.700
+ 22
9.751
± 0.50
+ 21.50 to + 22.50
9.210 to 10.320
1/ The above values are based upon the expression: dB = 20 log10 {Equiv. Voltage / .775}.
TABLE II. Frequency range.
From
To
Change in
(Hz)
indication (dB)
(Hz)
25
1,000
± 0.5
1,000
5,000
± 1.0
5,000
10,000
± 3.5
3
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