4.0 OPERATION
4.1 INTENDED USE
The furnace is a general purpose laboratory and heat treating of
material and should not be used for anything else other than its
intended purpose.
4.2 The instructions for operating the controller, over temperature
controller if fitted and timer if fitted are given in separate booklets.
4.3 PRINCIPLES OF OPERATION
The furnace is heated by a wire element wrapped around a ceramic
muffle which is cemented into place. The muffle is placed in a box
and insulated with a mixture of ceramic fibre and board for models
1 –4 and wire elements suspended on ceramic tubes for models 5 &
6. The temperature is controlled by a pid controller using a type r
thermocouple to control the temperature. A door safety switch is
fitted to remove the power to the heating element when the door
is opened. Mains on the green light will illuminate when power is
applied to the furnace. Instruments on / off switch and the
controller will illuminate when turned to the on position. Heater on
The amber light will illuminate whenever the elements are drawing
power. Over temperature optional extra. The door safety switch
disconnects the power from the elements when the door is
opened. The amber heater on light will go out while the door is
open if this does not happen consult the trouble shooting guide.
Summary of Contents for MRF Series
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