4.0
Operation
4.1
Operating Cycle
This product is fitted with an instrument switch which cuts off power to the control
circuit.
Connect the product to the electrical supply.
This product has fan-assisted circulation; the fan is on when the instrument switch is on.
Turn on the instrument switch to activate the temperature controllers. The controllers
illuminate and go through a short test cycle.
If a process timer is not fitted, the controller becomes illuminated and goes through a
short test cycle according to the controller setpoint or program. If a timer is fitted, the
controller may not become illuminated when the unit is switched on – to start the
controller, press the U button on the timer once (see section 3.4).
Over-Temperature option only
. If the digital over-temperature option has not yet
been set as required, set and activate it according to the over-temperature controller
instructions.
Unless a process timer is fitted and is off, the product starts to heat up according to the
controller set point.
The product will heat up according to the controller setpoint or program, unless a time
switch is fitted and switched off.
To turn the product off, set the instrument switch to its off position. The controller
display will go blank. If the product is to be left unattended, isolate it from the electrical
supply.
4.2
The Oven Door and Chamber
It is recommended that the instrument switch is turned off if the oven door is to be
opened when the temperature is below 120 °C. If the door is opened when on and the
set temperature is below approximately 120 °C, then the controller will attempt to
compensate for the drop in temperature and the actual temperature may exceed the
set temperature when the door is closed again.
Please note that the fan is on when the instrument switch is on. Opening the door does
not switch off the fan.
The tip of the temperature sensor is visible on the right of the chamber, below the fan.
It is not electrically live, but it is delicate and should not be touched.
4.3
Loading and Unloading the Chamber
Where accurate temperature control of the load is important, use the central part of the
chamber and distribute the load to allow free air circulation. Do not place loads on the
chamber floor; use the bottom shelf.
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4.0 Operation
