The Forced Air Cooler is optional equipment for extending the range of experimentation when used with the Temperature Process Control Trainer (38-002) or between that unit and the Level & Flow Process Control Trainer in the 38-003 to maintain a constant fluid input temperature.
The Forced Air Cooler extends the operating temperature of the Temperature Control Rig and allows direct control of its operating characteristics. It consists of an electric pump, a fan and radiator unit to cool the circulating water. The unit may be initially charged through the header tank which should be maintained "topped-up" to avoid the ingress of air.
There are two signals which may be applied for controlling the degree of cooling. The speed of the fan may be controlled by submitting a 4-20 mA current into the top DIN socket of the control section. The speed of the pump may be similarly varied by inputting a 4-20 mA signal through the separate adjacent DIN socket. The speed of the pump and fan are then controlled via phase controlled circuitry taking as it's input the 4-20 mA signal. Alternatively, the fan and the pump may be set to continuous for full speed operation. The optional accessory is the 38-481 water pressure regulator.
Features
- Maintains constant temperature for fluid input
- Enables quick response times in temperature reduction
- Variable speed fan
- Variable speed pump
Curriculum Coverage
- Familiarisation of the equipment
- Use as a manually controlled cooler
- Temperature control by varying fan speed
- Temperature control by varying pump speed
- Temperture control by varying secondary flow
