Specifications

31
Section C
Temperature
4.0 HEATING OPERATING SYSTEMS
4.1 Heating System
The Model 518 Chamber contains two (2) 250 Watt Electric Heaters (500 Watts total).
The heater is an integral part of the chamber, located inside the Chamber workspace.
Since the heater is already installed, there is no additional set-up required.
After turning “ON” the “TEMP” STANDBY switch, the microprocessor temperature
controller governs the operation of the Heating System.
1. The controller will determine the amount of heat needed to maintain the
desired set-point. Power will be applied to the heater as a series of time
proportioned pulses. See Section 4.2 – Microprocessor Temperature
Controller Operation for details.
2. The electric heating element and indicator light are located on the Fan Panel
(the heater is hidden from view). The Fan Panel is the white metal panel
inside the Chamber workspace, on the rear wall.
3. The heater indicator light will illuminate to indicate when power is being
applied to the heater. (The microprocessor LED’s will illuminate at the same
time.)
A thermal safety switch (also on the Fan Panel) is connected in series with the heater.
Power to the heater will be cut off if the temperature within the chamber exceeds 135
°F. (58°) (The Acrylic Chamber will begin to melt at 150 °F)
4.2 Cooling Systems
The Model 518 Chamber includes the ETS Model 563 Liquid Carbon Dioxide Cooling
System as a standard feature. Other cooling options include:
4.2.1 Model 563 Liquid CO
2
Cooling System
The Liquid CO
2
Cooling System is standard and is already installed onto the
Model 518 Chamber. The Solenoid Control Valve is wired into the ‘Relay PC
Board’, which is controlled by the microprocessor temperature controller. All the
user needs to do is connect the Transfer Hose to the appropriate liquid CO
2
cylinder with dip tube.(NOTE: CO
2
gas will not work)