HIGH TEMPERATURE
FURNACE HANDBOOK
ISSUE 8 - 05/05
Page 9 of 37
THE HIGH-TEMPERATURE FURNACE
The high-temperature furnace for realisation of metal freezing points is based on the heat-
pipe. It is furnished with two independent control systems, one for temperature control and
the other for over-temperature protection.
Proportional, integral and derivative adjustments for the controller Eurotherm 2604 and the
means for obtaining optimum settings, are described in the manufacturer's manual, which is
included as part of this manual. These parameters are initially adjusted to optimal conditions
for the Isotech Laboratory environment (ambient temperature of 20 ±2°C) in which the
furnace was tested prior to shipment.
The furnace has an over-temperature cut-off controller. Its purpose is to establish an upper
temperature limit after which all systems power will be shut down to protect the system from
the effects of possible operating controller failure.
In use:
a. The over-temperature controller should be set at a temperature approximately 50°C
higher than the operating controller setting.
b. To turn on system power at start up (or as required), it is necessary to actuate the
front panel off/on switch and also to depress the red reset button.
To adjust the over temperature trip point press the UP and Down keys to modify the SP
value to the desired temperature.
On furnaces with the 2216 controller fitted, the model type is shown on the controller at
power up, it is necessary to use the UP and DOWN keys to modify the value.
