5.0 Operation
5.4
Atmospheres
When an optional gas inlet is fitted, there is a label near the inlet saying "INERT GAS
ONLY". In practice, inert or oxidising gases may be used, but not combustible or toxic
gases.
5.5
Solenoid Valve with Manual Switch (if fitted)
If ordered the solenoid valve is operated using the panel mounted
switch. When the switch is in the 'ON' position the solenoid valve will
allow gas to
flow. Ensure the installation and use of the product does not create a hazardous
atmosphere. The workspace must have sufficient ventilation.
5.6
Variable Speed Fan (if fitted)
If fitted, the variable speed control is fitted in the air circulation fan circuit. A
panel mounted rotary dial is used to control the speed.
Please note that there is a minimum setting at which the fan motor starts up when the
product is switched on. It is recommended that the speed of the fan is not set below
50%, as there would be very little air flow around the chamber and also risk overheating
the fan motor.
5.7
Exhaust Fan (if fitted)
To operate the exhaust fan use the fan switch on the control panel; this is only
functional when the instrument switch is on.
The level of air exhaust can be controlled by adjusting the slider under the
exhaust box.
When the exhaust fan is turned on, there may be a drop in internal temperature before
the product recovers to the setpoint value.
The airflow should be adjusted to the minimum required by the process to reduce the
amount of energy wasted in heating air.
14
