MIL-PRF-1/262H
TABLE I. Requirements and tests.
Limits
MIL-STD-1311
Requirement or test
Notes
Conditions
Symbol
Unit
Method
Min
Max
Conformance
inspection, part 1
1231
3
Eb = 50 V dc
Is
165
---
mA dc
Emission (1)
1301
If
830
970
mA
Heater current
4, 5
Ehk = Eo
1353
Io
70
---
mA dc
Operation of rectifiers
µA dc
Ehk = - 450 V dc
1336
Ihk
---
75
Heater-cathode leakage
1201
---
---
---
Short and discontinuity
---
detection
Conformance
inspection, part 2
MegΩ
1211
3
E(a-all) = -500 V dc
R
10
---
Insulation of electrodes
Pressure = 55 ± 5
1002
6
---
---
---
Barometric pressure,
---
reduced
mmHg;
voltage = 980 V ac
1031
---
---
---
High-frequency vibration
No voltages
---
1231
3
Is
150
---
Emission (2)
Ef = 5.5 V;
mA dc
Eb = 50 V dc
1121
---
---
---
Base strain
---
2126
---
---
---
Envelope strain
---
1041
---
---
---
6
Shock
450 G; Epp/a = 0
---
1031
---
---
---
6
Vibration-fatigue
---
---
Shock and vibration -
fatigue test end points:
µA dc
1336
Ihk
---
150
Heater-cathode
leakage
1353
Io
65
---
Operation of rectifiers
mA dc
1105
---
---
---
Permanence of marking
---
See notes at end of table.
2
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