Specifications

Furnace

The furnace chamber is heated by four electric resistance

heaters which are embedded in a refractory material. The

chamber is insulated with a ceramic fiber insulation. The

control is located under the furnace chamber and is well

insulated from the heat generated in the furnace chamber.

A door safety switch removes power to the heating ele-

ments whenever the furnace door is opened. The choices

of temperature controllers are as follows:

Temperature Controller: “Basic

Automatic”

The basic automatic control provides simple automatic

control to one set point temperature. A single digital dis-

play will indicate either furnace chamber temperature or

set point temperature. This controller does not provide

over temperature protection.

Temperature Controller:

“Automatic”

This furnace controller consists of a microprocessor

based three mode temperature controller having adjust-

able over temperature protection and appropriate output

switching devices to control the furnace.

Temperature Controller:

“Programmable”

This furnace controller consists of a microprocessor

based three mode temperature controller/programmer

with adjustable over temperature protection and appropri-

ate output switching devices to control the furnace.

Principles of Operation

Note

When in the program RUN mode, the

programmer/controller serves to pro-

vide a programmed temperature pro-

file as described earlier. When in the

AUTOMATIC mode, the unit serves

as a single set point automatic tem-

perature controller.