3.3 Operation Parameter Setting

The page 'Settings' provides a 2-column table which is used to operate the DEICE-Controller. The settings are in particular:

Operation Parameter

• Operation Mode Deice --- The operation mode of the deicing controller is set here. The following modes are possible:

  • OFF --- The deice function is off; all other operation states will be reseted to the start parameters.
  • MANUAL --- The deice will started manually by overwriting the deice sensor state.
  • AUTO --- The system operates in auto mode which is the normal operation mode. Snow on the deice sensor will trigger the deice procedure. A single trigger of the deice procedure can be done by set the mode to MANUAL and back to AUTO. One cycle will be started with 59 minutes delay timer.

• Operation Mode Rainblower --- The operation mode of the rain blower controller is set here. The following modes are possible:

  • OFF --- The rain blower function is off, all other operation states will be reseted to the start parameters.
  • MANUAL --- The deice will started manually by overwriting the rain and deice sensor state.
  • AUTO --- The system operates in auto mode which is the normal operation mode. Snow or rain on the deice sensor will trigger the rain blower procedure. A single trigger of the rain blower procedure can be done by set the mode to MANUAL and back to AUTO. One cycle will be started with 59 minutes delay timer.

Loop Parameter

• Internal Temperature Threshold --- Sets maximal reflector internal temperature for the control loop. Should be around 15 to 30°C.
• Ambient Temperature Threshold --- Sets Ambient Temperature Threshold, below this temperature a deice cycle is possible, over this temperature the heater/blowers are switched off, because deicing is not needed.
• Temperature Slope Threshold --- Sets the requested speed of reaching the internal temperature threshold. If the slope below this setting the next stages will be activated.
• Measurement Interval --- Sets the measurement interval in which the measurement slope will be checked against the above threshold. After the first switch on, the measurement interval will be 3 times this interval.
• Temperature Hysteresis --- This value defines the hysteresis of the internal temperature threshold before the first stage can be activated.
• Delay Deice Sensor --- Delay timer for the Deice Sensor after loss of the input signal.
• Delay Rain Sensor --- Delay timer for the Rain Sensor after loss of the input signal.