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Bendix put these timers through a true torture test !

Test parameters as follows......

1. Install the two timers in vacuum chamber.

2. Wire circuitry for each timer as shown in figure 1.

3. Close switch S4.

4. Start timer as follows:
a. Adjust 360 Hertz Sine gen. output to 0. 5 v RMS.
b. Close switch Sl.
c. Close switch S2.
d. Open switch S1.
e. Verify timer operation in "Start mode" by observing
timer current & 1 minute switch closures.
(S 3 closed)
f. Record timer current (12 u amp max. in "Start mode").
g. Open switch S4.
h. Verify timer operation in "Stop mode" by observing
timer current.
i. Record timer current {7 u amp max in "Stop mode").

5. Record battery voltage {1. 2 to 1. 5 VDC).

6. Evacuate chamber to 10-5 Torr or better.

7. Stabilize timer temperature at 5 0°F.

8. Switch timer to "Start mode II by closing switch s4.

9. Verify that the timer is in the "Start mode" by observing
timer current (12 u amp max.) and 1 minute switch
closures.

10. Cool timer to -1 0°F and maintain at -1 0°F for a :geriod
of 2 hours. {Temperature shall not go below -10 F)

11. Raise chamber temperature to +15 0°F (min. )

12. Maintain chamber at +150°F (min.) for a period of
2 1 /2 hours.

13. Repeat steps 10 through 12 for a minimum of 36 complete
thermal cycles.

14. Return chamber to room temperature.

Here's the original Bendix documents.......

















 
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