MIL-PRF-1/1657E
TABLE I. Testing and inspection - Continued.
Method
Limits
Inspection
MIL-STD-1311 Notes
Conditions
Symbol
Min
Max
Unit
Conformance inspection,
part 3 - Continued
2/ 18/ Ebb = 125 V dc;
1031
Variable-frequency
mV ac
Ep
---
150
vibration
R1 = 10,000 ohms;
Rk = 50 ohms
---
---
---
---
Shock
1041
16/ 18/ Hammer angle =
30; no voltages
applied
---
---
---
---
Vibration fatigue
1031
17/ 18/ 2.5 G; fixed
frequency;
F = 25 Hz (min),
60 Hz (max)
---
Shock and vibration
fatigue-test end points:
1031
---
Ep
---
200
mV ac
Sweep and variable-
frequency vibration
60
A dc
1336
---
Ihk
---
Heater-cathode
leakage
Seal fracture
---
6/ 7/
---
30
---
pounds
18/
Seal strain
---
7/ 18/
---
---
---
---
19/
Heater-cycling life
1506
9/ 12/ Group D;
---
---
---
---
14/ Ef = 6.3 V; Ehk = 0;
Eb = 0; Rk = 0;
Ec = 0
---
Heater-cycling life-test
end points:
A dc
+30
---
1336
---
Ehk = +60 V dc
Ihk
Heater-cathode
A dc
---
-30
Ihk
Ehk = -60 v dc
leakage
MegΩ
Insulation of electrodes
1211
---
E(g-all) = -100 V dc
R
50
---
---
---
---
---
1516
11/ 12/ Group D;
Stability life test
(2 hours)
Eb = 215 V dc;
Rk = 150 ohms;
TA = room temp,
25C 5C;
g1 grounded
See footnotes at end of table.
3
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