Code 549 - Environmental Test Engineering and Integration

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•	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 204 is a small temperature controlled chamber used for thermal conditioning of small components. The portable chamber loads through a front opening door that has a viewing window. The instrumented payload is installed in the chamber with no special handling or mounting fixtures, and is connected to the ground support equipment via a port.

Mode of Operation

The chamber is cooled with LN2 and heated with electrical resistance elements. Typical cycling times from hot to cold, and from cold to hot, are 45 minutes and 65 minutes, respectively.

Parameters

Temperature Range: -180°C to +200°C
Cryogenic Liquid: LN2 at 50 psig
Heating Capacity: 510 W
Cooling Capacity: 100 W at -150°C

Physical Characteristics

Test Volume: 20" x 12" x 16" (W x H x L)
Viewport Size: 8" x 8"
Power: 120 VAC, 1 Phase, 20 amperes
Controller: Watlow 920 Programmable Controller

Integral Instrumentation

Payload Temperature: 7 thermocouple channels

NASA Goddard Space Flight Center

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