HP 11744195 - Manual (Page 15)

Chart Environmental Chambers Operation
Operation
Check system functions and your understanding of the system by following these steps
with an empty thermal enclosure before installing the product to be tested.
1. Verify that all utilities are on-line before operating equipment. Liquid nitrogen is
required for proper cooling. (Empty or low LN
2
tanks produce a mixture of liquid
and vapor which will not properly cool the chamber.) Proper voltage and phase
electrical supply are necessary for full heating capability. These requirements are
listed in the Specifications section.
2. With all function switches in OFF position, connect power to the chamber.
3. Be sure chamber enclosure door is closed securely.
4. Turn the Control Power switch to the ON position.
5. Press Reset push-button to enable control circuits.
6. Adjust temperature set points on the temperature controller to achieve desired internal
temperature.
Operator Control Switches
The control console has several selector switches and buttons. The switches/buttons are
identified on the following picture.
2 3
1
5
These switches/buttons provide the following control:
1. Watlow Controller
Controls the internal chamber heating, cooling, circulations fans, air purge and
window heaters.
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