Device Section

 

 

This Device section changes appearance according to the operational mode: MASTER or REMOTE.

 

REMOTE operational mode

 

Under REMOTE operational mode, the Device section allows the user to define:

      the Read Cycle;

      Timeout period corresponds to the maximum allowed data age (default value = 60 sec). If the data is older than this value the Alarm Comm is activated;

      Sky Temperature Correction Coefficients;

      Wind speed calculation as average of the last X readings where X is a value between 1 and 30 (default value 6);

 

The Device section has the appearance illustrated below. Note that when running, button Constants from Master button is displayed (RHS of figure below) which allows the Temperature Correction Coefficients to be copied from the MASTER.

 

 

 

Setup TAB - Device Section (for REMOTE mode)

 

 

 

 

 

Setup TAB - Device Section (for REMOTE mode) while running

 

 

 

MASTER operational mode

 

The Device section allows the user to define:

        the serial port to be used - COM1 up to COM32 (default=COM1);

        the device reading cycle in seconds from a minimum of 10 sec up to a maximum of 60 sec (default value 10 sec);

        the RS232 communications Timeout period in seconds from a minimum of 5 sec up to a maximum of 99 sec (default value 5 sec);

        Temperature units - C or F

        Speed units - km/h, mph, m/s or knot;

        Rain Sensor Heater Control Parameters;

        Sky Temperature Correction Factors;

        Switch Control flag;

        Wind speed calculation as average of the last X readings where X is a value between 1 and 30 (default value 6);

 

Under MASTER mode operation, the Device section has the appearance illustrated below and note there is a vertical scroll bar on the right hand side of the panel

 

 

 

After selecting a communication port, use the Test Port button to test the port. If the port is not available a message is displayed at the bottom of the window accompanied by a warning sound, as illustrated in figure above. If the port is OK, a message is displayed at the bottom of the window, as illustrated in figure below.

 

 

Setup Tab Device section (for MASTER mode)

 

Communication port Error message (for MASTER mode)

 

Communication port OK message (for MASTER mode)

 

 

 

 

 

The Timeout period corresponds to the maximum time period that the program waits for a response from the device through the RS232 port. Note that if this period is longer than the Read Cycle and, for any reason the program does not receive the information from the device, the program will skip read cycles until the timeout period expires.

 

 

 

 

 

The Rain Sensor Heater Parameters are used by the program to adjust the power to the rain sensor heating element in order to avoid the formation of condensation on the rain sensor surface.

 

The field TEMP of the LOW column corresponds to the ambient temperature (C), below which the rain sensor operational temperature is kept at the value defined in the DELTA field. For example, in the case illustrated in figure above, for ambient temperatures below 0C the rain sensor operational temperature will be kept at 6C.

 

The field TEMP of the HIGH column corresponds to the ambient temperature (C), above which the rain sensor operational temperature will be kept at the ambient temperature + the value defined in the DELTA field.  For example, in the case illustrated in figure above, for temperatures greater than 20C the rain sensor operational temperature will be adjusted to the ambient temperature + 4C.

 

For ambient temperatures comprised between LOW TEMP and HIGH TEMP values, the system will calculate an increment which is directly proportional to the ambient temperature and limited by the LOW DELTA and HIGH DELTA values. This increment is added to the ambient temperature to establish the rain sensor operational temperature.

 

The Min. parameter defines the minimum heating level. This parameter corresponds to minimum level of heating at which the rain sensor heater is kept and it may create a situation where the rain sensor temperature is above the value calculated by the previous parameters.

 

The Heat Impulse mechanism has the objective to dry the rain sensor surface if the rain sensor stays continuously WET/RAIN for the period of time defined by the CYCLE field (in seconds).

 

The duration of the pulse is given by the DURAT field (in seconds) and the pulse intensity is calculated in terms of the rain sensor temperature as the value of the ambient temperature (C) + the TEMP field (C).

 

Disabling Heat Impulse

Setting any of the fields DURAT, TEMP, CYCLE to zero disables this mechanism.

 

When the Heat Impulse is initiated the following message is displayed in the Sensor TAB:

Heat Impulse Warming up - The system will keep this message displayed until the rain sensor reaches the desired temperature, i.e. ambient temperature + value of field TEMP

 

 

Do NOT choose a too large value for field TEMP.

If a too large value is selected the heater may have not enough power to drive the rain sensor to temperature defined by field TEMP + ambient temperature. This will cause the heater to keep warming up the rain sensor indefinitely.            

 

Suggestion: Use values smaller than 15.

 

After reaching the desired temperature, the system will display the following message:

Heat Impulse - Holding for 60s - The system will keep this message displayed for 60s, i.e. the period of time defined in the field DURAT which corresponds to the pulse duration.

 

 

Message displayed at the beginning of Heat Impulse Cycle indicating that the rain sensor is being warmed up.

 

Message displayed when rain sensor temperature reaches the desired impulse temperature given by ambient temperature + Heat Impulse Temp.

 

End of heat impulse cycle.

  

The Sky Temperature Correction Coefficients refer to Sky Temperature Correction Coefficients.

 

 

The Switch Control can disable the control of the switch by the program allowing another external program to perform this task.

 

 

The Wind Speed is calculated as an average of the last X readings where X is a value between 1 and 30.  The default value is 6 which, in conjunction with the default reading cycle of 10 sec, corresponds to the average wind speed over the last minute.

 

 

 

 

The Safe condition delaycan be set to wait a few seconds before signalling SAFE , to avoid spurious conditions.

 

The Cloud alarm delay, in a similar fashion, can be used to avoid a stray cloud firing the alarms. The cloudy condition must persist through this period to be valid.

 

The Ambient temperature source, can be chosen as both the IR and RH sensors provide ambient temperature information. If present, the external RH sensor is the best source of ambient temperature. The IR sensor will provide a good value, but always a few degrees higher than real (not a real problem for cloud detection).

 

The Temperature offsets, can be set to fine - tune the temperature readings. Under normal conditions, the IR offset should be 0, and the ambient may have a value of a few degrees, depending on the sensor source of this data.

 

Last, the Anemometer model selection, allows to set the correct anemometer, grey/gray - older model, black, available since 2016.