MTS Series 651 Environmental Chambers - Manual (Page 24)

Series 651 Environmental Chamber 24
2. Connect a coolant gas exhaust line to the vent on the rear of the chamber to
carry exhausted cooling gases away from the test site. The exhaust line must
have an inside diameter at least as great as the diameter of the vent, and
should be as short as possible, with as few bends as possible to prevent back
pressure in the chamber.
3. Turn the liquid withdrawal valve on the supply tank on before beginning a
test.
Note When cooling is not being used, the liquid withdrawal valve on the supply
tank should be kept closed to prevent leakage of the coolant.
Check the operating temperature range of each component in the
environmental chamber. All components must be able to operate at the
temperature of the test.
Damage to equipment can occur.
Do not set a testing temperature that is higher or lower than the temperature
rating of any component (grips, fixtures, and so forth.) inside the chamber.
Setting the testing
temperature
Set the desired chamber temperature or temperature range with the temperature
controller. See the temperature controller manual.
Note Do not set a testing temperature colder than -129°C (-200°F). Loss of
temperature control to the chamber will cause nitrogen “snow” to fill the
chamber, invalidating test results.
Do not set a testing temperature higher than the design operating range
(see specifications). If the temperature in the chamber exceeds the
design operating range by approximately 28°C (50°F), the high
temperature limit switch will disconnect power from the heater elements.
WARNING