MIL-PRF-1/1325F
TABLE I. Testing and inspection - Continued.
Inspection
Method Notes
Conditions
Acceptance
Symbol
Limits
Unit
MIL-STD-
Level
20/
Min
Max
1311
Conformance inspection,
part 3 - Continued.
16/ 18/ Hammer angle = 30°
1041
---
Shock
---
---
---
---
No voltages applied.
---
---
---
---
---
17/ 18 2.5 G; fixed frequency;
Vibration fatigue
1031
F = 25 Hz (min), 60 Hz
(max)
Shock and vibration-
---
fatigue test end points:
mV ac
200
---
Ep
---
---
1031
Sweep and variable-
frequency vibration
---
Ihk
---
---
1336
Heater-cathode leakage
±60
µA dc
---
---
30
---
Lbs
6/ 7/
Seal fracture
---
18/
Seal strain
---
7/ 18/
---
---
---
---
---
19/
9/ 14/ Group D;
Heater-cycling life
1506
---
---
---
---
---
Ef = 6.3 V; Ehk = 0;
Eb = 0; Rk = 0;
Ec = 0
Heater-cycling life-test
---
end points:
---
---
---
---
Shorts or open heaters
---
---
---
Ehk = +60 V dc
---
1336
Heater-cathode leakage
---
+30
---
Ihk
µA dc
Ehk = -60 V dc
-30
---
Ihk
µA dc
MegΩ
---
1211
E(g-all) = -100 V dc
Insulation of electrodes
---
---
50
R
---
---
---
---
---`
11/ 12/ Group D;
1516
Stability life test
(2 hours)
Eb = 215 V dc;
Rk = 150 ohms;
TA = room,
25°C ± 5°C;
g1 grounded
---
Stability life-test end-point:
%
15
---
---
---
1306
Transconductance (1)
ĆSm
t
---
---
---
---
---
Survival-rate life test
1521
13/ 15/ Stability life test, or
equivalent conditions;
TA = room,
25°C ± 5°C;
t = 100 hours
See footnotes at end of table.
3
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