MIL-PRF-62413B(AT)
3.3.1 Envelope. Envelope dimensions for each type of pickup shall be in accordance
with the requirements of the applicable drawing (see 4.4.2):
Type
Drawing Number
I
12302067
II
12302350
3.3.2 Weight. The weight of the pickup shall be as follows (see 4.4.2):
Type
Size
I
0.15 kilograms (kg) (0.33 pounds (lb))
II
0.16 kg (0.35 lb)
3.4 Performance.
3.4.1 Insulation resistance. The minimum insulation resistance between the coil and case
shall be 1 megohm at 50 volts (V) root mean square (rms) (see 4.4.3).
3.4.2 Dielectric strength. Dielectric strength shall be sufficient for the pickup to sustain
100 V rms applied between the coil and case (see 4.4.4).
3.4.3 Output voltage. The output voltage shall be in accordance with table I for the
applicable type of pickup (see 4.4.5).
TABLE I. Output voltage.
Engine
Output
Surface
Coil
Test
Pickup
Load
Frequency
speed
voltage
speed
resistance
gap
type
(ohms)
(pps) 2/
(%)
(peak)
(mmps [ips]) 1/
(ohms)
mm (in)
Type I
5
0.3
4700
3352 (132)
66
2.54 (0.1)
85-115
100
5.0
4700
66700 (2626)
1313
2.54 (0.1)
85-115
Type II
5
0.4
4700
2261 (89)
45
2.54 (0.1)
80-460
54
4.0
4700
24562 (967)
483
2.54 (0.1)
80-460
108
7.0
4700
49124 (1934)
967
2.54 (0.1)
80-460
1/ (mmps [ips]) = millimeters per second (inches per second).
2/ pps = pulses per second.
3.4.4 Phasing. The pickup shall be wired so that pin A is positive with respect to pin B
when the pickup tip is approached by a magnetic object (see 4.4.6).
3.5 Environmental conditions.
3.5.1 Temperature. The pickup shall operate when exposed to temperatures of -54 to
204 degrees Celsius (°C) (-65 to 400 degrees Fahrenheit (°F)) as specified in 4.4.7.1.
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