User manual LA CROSSE TECHNOLOGY WS1700

[. . . ] 868MHz WEATHER STATION Instruction Manual INTRODUCTION: Congratulations on purchasing this state-of-the-art weather station as an example of excellent design and innovative measuring technique. Featuring time, date, calendar, weather forecast, wind direction, wind gust and wind speed, rainfall, indoor/outdoor temperature and outdoor humidity, air pressure and various alarm settings for different weather conditions, this weather station will provide you with various weather information and weather forecast. Pages after pages, you will discover that the operation of your weather station is really simple !« Instant Transmission+» is the up and coming state-of-the-art new wireless transmission technology, exclusively designed and developed by LA CROSSE TECHNOLOGY. [. . . ] User may press any key to stop the sound. HYSTERESIS To compensate for fluctuation of the measured data, which may cause the weather alarm to sound constantly if the measured reading is close to your set level, a hysteresis function has been implemented for each weather alarm. For example, if the high temperature alarm is set to +25°C and the current value moves to +25°C, the alarm will be activated (if it has been enabled). Now when the temperature drops to +24. 9°C or below and thereafter again increases to beyond +25°C, the data will be blinking, but no alarm will be activated. It has to drop to below +24°C (with a pre-set hysteresis of 1°C) so that the alarm can be produced again. Hysteresis values for the various weather data types are given in the following table: Weather data Temperature Humidity Wind speed Hysteresis 1°C 3% RH 5 km/h Note: The temperature or humidity data will keep on flashing even after a key has been 102 pressed to stop the alarm or buzzer has been switched off, to indicate that the current weather condition is out of the pre-set limit(s) WEATHER FORECAST AND WEATHER TENDENCY: The weather forecast icons (Weather girl): One of the 15 different weather icons (featured by Weather girl with different clothing) is displayed in the centre of LCD, which indicate the different forecast weather condition due to air pressure level (Sunny, Sunny + Cloudy or Cloudy + Rainy) and the current outdoor temperature (Temperature value detected by Transmitter channel 1) : 78. 8°F ( 26°C) 66. 2 to 78. 6°F (19 to 25. 9°C) 50 to 66°F (10 to 18. 9°C) 32 to 49. 8°F (0 to 9. 9°C) < 32°F (< 0°C) Sunny 103 78. 8°F ( 26°C) 66. 2 to 78. 6°F (19 to 25. 9°C) 50 to 66°F (10 to 18. 9°C) 32 to 49. 8°F (0 to 9. 9°C) < 32°F (< 0°C) Sunny + Cloudy 78. 8°F ( 26°C) 66. 2 to 78. 6°F (19 to 25. 9°C) 50 to 66°F (10 to 18. 9°C) 32 to 49. 8°F (0 to 9. 9°C) < 32°F (< 0°C) Cloudy + Rainy 104 For every sudden or significant change in the 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 the Weather Projection Station to register. 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 extremes. The icons displayed forecasts the weather in terms of getting better or worse and not necessarily sunny or rainy as each icon indicates. For example, if the current weather is cloudy and the rainy icon is displayed, it does not mean that the product is faulty because it is not raining. It simply means that the air pressure has dropped and the weather is expected to get worse but not necessarily rainy. Note : After setting up, readings for weather forecasts should be disregarded for the next 1224 hours. This will allow sufficient time for the Weather Station to collect air pressure data at a constant altitude and therefore result in a more accurate forecast. Common to weather forecasting, absolute accuracy cannot be guaranteed. The weather forecasting feature is estimated to have an accuracy level of about 75% due to the varying areas the Weather Station has been designed for use in. In areas that experience sudden changes in weather (for example from sunny to rain), the Weather Station will be more accurate compared to use in areas where the weather is stagnant most of the time (for example mostly sunny). If the Weather Station is moved to another location significantly higher or lower than its initial standing point (for example from the ground floor to the upper floors of a 105 house), remove the batteries and re-insert them after about 30 seconds. By doing this, the Weather Station will not mistake the new location as being a possible change in air-pressure when really it is due to the slight change of altitude. Again, disregard weather forecasts for the next 12 to 24 hours as this will allow time for operation at a constant altitude. THE WEATHER TENDENCY INDICATOR Working together with the weather icons are the weather tendency indicators (the upward and downward arrows located on the right hand side of the weather girl icon). When the indicator points upwards, it means that the air-pressure is increasing and the weather is expected to improve, but when indicator points downwards, the airpressure is dropping and the weather is expected to become worse. Therefore, user may see how the weather has changed and is expected to change. For example, if the indicator is pointing downwards together with cloudy icons, it means that the last noticeable change in the weather was when it was sunny (the sunny icon only). [. . . ] Once the wind sensor is fixed onto the mast, connect the cable to the corresponding thermo-hygro sensor socket so that operating power supply can be received and data can be transmitted to the base station. 127 The Rain Sensor Horizontal panel For best results, the rain sensor should be securely mounted onto a horizontal surface about 1 meter above the ground and in an open area away from trees or other coverings where rainfall may be reduced causing inaccurate readings. When securing into place, check that rain excess will not collect and store at the base of the unit but can flow out between the base and the mounting surface (test by pouring clean water). After mounting the rain sensor and placing battery, the rain sensor is now operable. For testing purposes, very slowly pour a small amount of clean water into the rain sensor funnel. [. . . ]