MIL-PRF-1/1204H
TABLE I. Testing and inspection - Continued.
MIL-STD-
Limits
1311
Inspection
Method
Notes
Conditions
Symbol
Min
Max
Unit
Conformance inspection,
part 3
Life test
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Group C; Eb2 = 800 V dc;
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t = 500 hours minimum;
light = 5 fL
Life test end points:
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Grid No. 1 leakage
5251
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5
µA dc
current
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15
Anode No. 2 leakage
5251
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µA dc
current
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Stray light emission
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5216
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(conventional types)
5226
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0.50
Line width A
W idth
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mm
5226
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0.75
Line width B
W idth
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mm
5223
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50
Modulation
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ĆEc
V dc
2/
5221
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Light output
4
Light
fL
Cathode illumination
5216
3/
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Barometric pressure,
1002
3/
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54 ± 5 mmHg
reduced
Pressure
1141
3/
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Direct-interelectrode
1331
3/
k to all
Ck
---
2.5
pF
g1 to all
capacitance
Cg1
---
5
pF
D1 to D2
C1D2
---
1.25
pF
D3 to D4
C3D4
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1
pF
D1 to all
CD1
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3
pF
D2 to all
CD2
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4
pF
D3 to all
CD3
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3
pF
D4 to all
CD4
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3
pF
Vibration
5111
3/
W idth
---
1.0
mm
Shock
5115
3/
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Base strain
1121
3/
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1/ This test is to be performed at the conclusion of the holding period.
2/ The light output shall be taken using a .500 by .500 inch (12.7 by 12.7 mm) raster of 35 to 105 lines and 60 frames per second. Ik =
500 µA dc.
3/ This test shall be performed during the initial production and once each succeeding 12-calendar months in which there is
production. An accept on zero defect sampling plan shall be used, with sample of three tubes with an acceptance number of zero.
In the event of failure, the test will be made as a part of conformance inspection, part 2, with an acceptance level of 6.5 (see 5/).
The regular "12-calendar month" sampling plan shall be reinstated after three consecutive samples have been accepted.
4/ First article inspection shall consist of performing all tests listed in this tube specification sheet. The sample size and allowable
defects shall be in accordance with MIL-PRF-1, qualification, samples, and acceptance criteria. Three copies of the test report
(see MIL-HDBK-831) shall be forwarded to the purchasing activity for evaluation by the preparing activity. Invitation for bids should
provide that the preparing activity reserves the right to waive the requirements for first article samples as to those bidders offering a
product which has been previously acquired or tested by the Government, and that bidders offering such products who wish to rely
on such production or test, must furnish evidence with the bid that prior Government approval is presently appropriate for the
pending acquisition.
5/ This specifiction sheet uses accept on zero defect sampling in accordance with MIL-PRF-1, table III.
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