Specifications

This will not automatically apply power to the heaters. Turning on the “TEMP”

STANDBY switch only makes the heaters available to the microprocessor

controller.

When the microprocessor activates the heaters, the small green LED in the

upper left corner of the Temperature display will illuminate. The red neon

light on the ‘Fan Panel’ will also illuminate to indicate that the heaters are

receiving power.

3. The controller will determine the amount of heating needed to maintain the

desired set-point in the enclosure.

If less than the full output capacity of the heater is needed, the controller will

provide pulses of power to the unit to limit the output. The heater will be

turned on and off cyclically to obtain an average temperature output lower

than the full capacity of the heater, appropriate to maintain the desired set-

point in the chamber.

For best results, the Cycle Time (CyC.t) should be set as short as possible.

The minimum cycle time for the 500 Watt Heater in the Model 518 Chamber

is 1.0 second. Shorter times may damage the Controller.

5.2.3 Cooling System

The Model 563 Liquid Carbon Dioxide Cooling System may be disabled if it is not

needed or if not connected to a gas tank. In LEVEL 2 of the Programming Menu,

adjust SP1.P from ‘Cool’ to ‘nonE’. This will manually disable only the cooling

system and prevent the solenoid valve from ‘clicking’ on and off unnecessarily.

The Heating System will be unaffected.

To operate the Model 518 Cooling System:

1. Adjust the set-point to a value below the ambient temperature.

2. Turn on the “TEMP” STANDBY switch on the front of the Control Panel.

This will not automatically apply power to the cooling system. Turning on the

“TEMP” STANDBY switch only makes the cooling system the available to

microprocessor controller.

When the controller activates the cooling system, the small red LED in the

lower right corner of the Temperature display will illuminate.

3. The microprocessor will determine the amount of cooling needed to maintain

the desired set-point in the enclosure.