TRENDnet 18-1106-33 Detailed Description, General operating principle 7.2 Front and rear panels

7. Detailed Description

7. Detailed Description

7.1General operating principle

7.2Front and rear panels

7.3Control panel

MultiTemp III regulates temperature by balancing the effects of constant cooling and controlled pulses of heating.

Constant cooling is provided by a built-in unit that includes a compressor, an air cooled liquifier and an evaporator (a coo- ling coil as heat exchanger) located in the chamber. This coo- ling unit operates at temperatures up to 68.0 °C. Beyond this temperature, the compressor automatically switches off.

Heating is provided by pulses of power at a frequency esta- blished by the set working temperature.

This type of control achieves an optimal balance between cooling and heating and maintains the liquid temperature constant at any pre-set level.

See Figure 1 for a description of the front and rear panels with connection points for cooling liquid and power.

The five digit numeric display shows either the actual opera- ting temperature, error messages or the set temperature. After selecting mode or setting temperature, the display automati- cally switches back to the actual temperature after approxi- mately 10 seconds.

In the “actual temperature” mode, a constantly lit dot in the left digit position indicates that the heater is working to reach the set temperature. A flashing dot indicates that the liquid in the bath has reached this working temperature.

The control light is lit only when the compressor is in operation.

16