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Environmental Test Engineering and Integration
Code 549
Environmental Project
Structural Dynamics
Electromagnetic
Space Simulation
•
 Facilities
- T/V Facility 225 (9'x14')
- T/V Facility 237 (7' x 8')
- T/V Facility 238 (12' x 14')
- T/V Facility 239 (7' x 8')
- T/V Facility 240 (3' x 3')
- T/V Facility 241 (3' x 4')
- T/V Facility 245 (2' x 3')
- T/V Facility 246 (3.5' x 5.5')
- T/V Facility 281 (3' x 4')
- T/V Facility 290 (27' x 40')
- T/H Facility 204 (2.2 ft³)
- T/H Facility 232 (64 ft³)
- T/H Facility 233 (64 ft³)
•
 Personnel
 
Facility 241 is a horizontal, cylindrical, medium-sized, thermal vacuum test chamber used for thermal vacuum testing and baking out test articles. The chamber is equipped with a viewport for optical testing. The payload table has a grid-patterned mounting holes to secure the hardware.
 Facility 241

Mode of Operation

After the test article is instrumented with thermocouples and installed in the chamber, it is connected to the ground support equipment and data acquisition system via electrical feedthroughs. After roughing down the chamber with the mechanical pump, ultimate pressure is achieved with the cryopump. A main valve allows test set up while the pumping system is being established.


Parameters
Test Pressure: <13.3µPa (10-6 torr)
Shroud Temperature: -150°C to +150°C
Chamber Pumping Speed: 1,500 lit/sec @ 133 µPa
Evacuation Time : Atm to 200 Torr in 20 min.


Physical Characteristics

Test Volume: 3' x 4'
Payload Support: Actively cooled platen on support rails
Std. electrical feedthroughs: 61-pin, 37-pin, 7-pin, 4-pin, RF


Integral Instrumentation

Pressure: T/C gauge - atm to 0.13 Pa, Capacitance manometer - Atm to 10-3 mmHg
Ion Gauge: 10-3 mmHg to ultimate
Payload Temperature: 36 thermocouple channels
Contamination Monitor: TQCM, coldfinger, cryocoil, residual gas analyzer

 

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NASA - National Aeronautics and Space Administration
Editor: J. Killam
NASA Official: D. Robinson
Last Updated: March 25, 2024
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