Weather Center Terms
COMPONENTS
ICONS
WEATHER DATA
Base Station Receiver
Thermometer-Hygrometer Transmitter

Wind Sensor

Rain Sensor
Heavy Weather PC Software
Dew Point
Indoor & Outdoor Temp/Humidity
Rainfall
Relative/Absolute Pressure
Wind Chill
Wind Speed and Direction
Weather History
COMPONENTS -
Base Station Receiver The base station displays the indoor and outdoor weather the data from the thermometer-hygrometer, wind and rain sensors. Together with the radio controlled time, all the data is displayed on the large LCD with LED back-light.
Thermometer-Hygrometer Transmitter The thermometer-hygrometer sensor measures the temperature and the humidity of it’s surrounding outdoor environment and at the same time, collects the data from the rain and wind sensors before transmitting all the weather data to the base station by wireless 433MHz or by a cable connection.
Wind Sensor The wind sensor collects both the wind speed and wind direction data at the point of mounting and sends this to the thermometer-hygrometer sensor for transmitting to the base station.
Rain Sensor The rain sensor collects rainfall data at the point of mounting and sends this to the thermometer-hygrometer sensor for transmitting to the base station.
Heavy Weather PC Software Displays all the weather data from the base station received from the three external sensors onto your PC. Allows you to adjust all of the Base Receiver settings with ease. Simply use the PC cable supplied and connect the base station to the PC using the desired COM port on your PC.
ICONS -
Weather Icons The three weather icons can appear in the following combinations, provide a weather forecast upon reading of any significant changes in air pressure:
 
Sunny Icon
Cloudy w/ Sunny Intervals Icon
Rainy Icon

Sunny

Cloudy w/ Sunny Intervals

Rainy

  For every sudden or significant change in air pressure, the weather icons will update accordingly to represent the change in weather. If the icons do not change, then it means either the air pressure has not changed or the change has been too slow for to register a reading. However, if the icon displayed is a sun or raining cloud, there will be no change of icon if the weather gets any better (with sunny icon) or worse (with rainy icon) since the icons are already at their extreme points.

The icons displayed forecasts the weather in to terms of getting better or worse and not necessarily sunny or rainy as each icon may indicate. For example, if the current weather is cloudy and the rainy icon is displayed, it does not mean that forecast is not accurate because it is not raining, it means that the air pressure has dropped and the weather is expected to get worse but not necessarily rain.

Storm Warning The “lightening” icon next to the weather icon will appear when the storm alarm has been reached to indicate a possible storm according to the user settable air pressure values set in the base station (see storm warning alarm setting below). For storm warning air pressure sensitivity setting on the base, please refer the main instruction manual.
 
Storm Warning Icon
Storm Warning
Weather Tendency Indicator The weather tendency indicator arrow is located below the weather symbols. It indicates the air pressure development and provides a forecast of the weather to be expected by the decreasing or increasing air pressure. With the tendency arrow pointing upwards, it means that the air pressure is increasing and the weather is expected to improve but if the tendency arrow is pointing downwards, the air pressure is decreasing and the weather is expected to become worse.
 WEATHER DATA -
Dew Point Dew point occurs when the temperature and humidity is at such level that the humidity becomes a liquid on a surface. The dew point data is displayed with current, minimum and maximum information.

The recorded minimum and maximum dew point values within a period are also displayed along with the corresponding dates and times and are automatically updated when a new minimum or maximum values are reached.

Indoor and Outdoor Temperature/Humidity The weather data recorded by the thermometer-hygrometer sensor (for outdoor data transmission) and base station (for indoor data) is displayed accordingly to the temperature, humidity section on the screen numerically and graphically (for temperature data only)

The recorded minimum and maximum temperature and humidity values within a period are also displayed along with the corresponding dates and times and are automatically updated when a new minimum or maximum values are reached.

Rainfall  Three sets of rain data are recorded by base station and displayed on the on the base station and heavy weather program as total rain, rain in the last 24 hours and rain in the last 1 hour. The information is displayed numerically and graphically for easy reference. The scale in the total rainfall column will automatically increase should the rainfall surpass the initial scale maximum displayed.

The recorded maximum rainfall value for 24 hour and 1 hour within a period is also displayed along with the corresponding date and time and is automatically updated when a new maximum value is reached.

Relative/Absolute Pressure Relative air pressure is calculated at sea level from the local absolute air pressure and is thus valid as a reference for weather conditions and weather developments. For example an absolute air pressure of 28.40 inHg in a city at an approximate altitude of 1500ft above sea level corresponds to a relative air pressure of 29.91 inHg at sea level. The relative unit pressure can be displayed in inHg or hPa

The recorded minimum and maximum pressure values within a period are also displayed along with the corresponding dates and times and are automatically updated when a new minimum or maximum values are reached.

Wind Chill The wind chill data recorded by the wind sensor is displayed with current temperature, minimum and maximum temperature recording.

The recorded minimum and maximum wind chill values within a period are also displayed along with the corresponding dates and times and are automatically updated when a new minimum or maximum values are reached.

Wind Speed and Direction The wind data recorded by the wind sensor are received and displayed on the base station and heavy weather program. The wind direction data is simply indicated by letters (for example N=North, NE=North East, E, SE and etc.) or in degrees.
The wind speed unit is user selectable to display the wind speed in km/h, mph, meters-per-second and knots. The bft (Beaufort scale) at the top of the wind section displays the velocity of each wind measurement in the form of a bar for easy reference.

The recorded minimum and maximum wind speed values within a period are also displayed along with the corresponding dates and times and are automatically updated when a new minimum or maximum values are reached.

Weather History - Heavy Weather PC Software The Heavy Weather program automatically records all the weather data from the current period onwards to form a history of the weather events. The recording interval can be set from 1 minute to up to 60 hours in the history section. (default setting 1 hour) together with the option of recording a next set of data. The next set of data option can be used for example if the user set the initial recording interval to every 1 hour and required the next set of data for in 5 minutes time, the program would then initiate recording of the weather data in 5 minutes before reverting to the previous setting of 1 hour. However based on the previously given example, due to the mass communication of weather data and high frequency transmission from the sensors to the base station to the PC and back again, it is possible that the next set of data recording i.e. 5 minute interval will be missed and will not in fact be executed in exactly 5 minutes time as will be seen from the history file.

From the main Heavy Weather window, the history section will show the file name used to save the weather data together with the date and time and the total number of sets of data recorded. Each set of data consists of pressure, indoor temperature, indoor humidity, outdoor temperature, outdoor humidity, dew point, wind chill, wind speed, wind direction, total rain, time and date. The user can also select to record a new history file at anytime by changing the history file or revert to any saved history file that had been previously saved. The initial history file name is history.dat. If a previously saved history file is used again, the current recording interval will be regarded as the latest setting and all new data will be recorded into that file (see 8.0 Settings below for working detail). The history file can be displayed in a window parallel in running to the Heavy Weather program. If desired the saved files can be saved as text files and opened in other formats.

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