MIL-PRF-1/973E
TABLE I. Testing and inspection - Continued.
MIL-STD-
1311
Limits
Unit
Method
Notes
Conditions
Symbol
Inspection
Min
Max
Conformance inspection,
part 3
Life-test provisions
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17/
Group A; counting
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rate = 1,000 Nps
(min); t = 500 hrs
Life-test end points
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9/ 17/
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---
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Variable-frequency
1031
4/ 11/
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---
---
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vibration
16/
Temperature cycling
---
8/ 14/
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µA dc
Leakage current
6205
14/
Ebb = 500 V dc
Lib
---
0.5
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Shock
1041
4/ 13/
Hammer angle = 40°
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16/
1/
A minimum of 28 samples shall be submitted for qualification testing. The samples to be submitted for
qualification testing will be broken down into the following subgroups:
a.
Shelf life only
6
b.
Electrical, including life test
6
c.
Shock test only
10
d.
Variable-frequency vibration
6
2/
Each tube shall have an individual serial number permanently marked on the tube.
3/
The response characteristics, current, and count rate versus field intensity of a typical type 5980 or 5980A
radiation counter tube shall be shown on figure 3. In determining tube response, Ebb = 700 V dc and Rp = 1
Meg ± 10%. Tube current shown as measured by means of a microammeter in series with the tube cathode,
and the count rates as determined using a scaler having a resolving time of 0.8 microseconds and a
discrimination level of 0.25 volts.
3
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