Operation - Techne IFB-121 Operator's Manual

To set the temperature controller to the required operating temperature, switch on the electrical supply
which will illuminate the power and cut-out indicators. Then set the required temperature by using the
up and down arrows. Depress the reset switch to initiate the system and extinguish the cut-out indicator.
Your unit is fitted with a Eurotherm 2208L controller and the parameters are factory set and should not
be changed.
As the fluidised bath heats up the fluidisation will become more vigourous, due to the expansion of the
fluidising air. Units fitted with the automatic fluidising air control system will automatically reduce the air
input so as to keep a constant level of fluidisation. Manually operated units must the fluidising air flow,
reduced unit the level of fluidisation returns to its origional state. The following table indicates the flow
rates that are factory set on an auto-air unit.
Ambient to 200°C
200°C to 400°C
400°C to 600°C
The fluidised bath should be operated with the bath lid fitted to reduce heat loss during the heat up
period, and to increase the efficiency of the fume extraction system. As the temperature of the fluidised
bath approaches the set point, the heater indicator, situated in the temperature controller fascia, will
cycle on and off, until the actual temperature reaches the set point temperature.
It may be desirable, depending on the process being carried out in the fluidised bath, to check the actual
bath temperature with an independent temperature sensor. Any offset in the temperature may be
corrected by adjustment of the temperature controller (an instruction manual for the temperature
controller is included with this manual). Further temperature checks may be made at various points
within the fluidised bath to ensure good temperature uniformity is being achieved throughout the bed.
Slight adjustment of the fluidising air flow rates will reduce any excessive temperature gradients.
CAUTION: Care should be taken when handling hot parts which have been removed from a fluidised
bath. We recommend that protective clothing (gloves, aprons, and visors, etc) be worn at all times when
working with fluidised baths and that the installation and maintenance procedures outlined in this
booklet be followed explicate.

OPERATION

320 l/min
260 l/min
180 l/min
25