La Crosse Technology WS-1510-IT Instruction Manual

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La Crosse Technology WS-1510-IT Instruction Manual Manual pdf 10 page image

10AIR PRESSURE HISTORY (ELECTRONIC BAROMETER WITH BAROMETRIC PRESSURE TREND)The bottom section of the LCD also shows the relative air pressure value and the air pressure history.Depending on programming conditions, display of the history of air pressure is in the form of a graph consisting of vertical bars.The bar graph of the electronic barometer shows the air pressure history of the past 12 hours in five 3-hour steps.The horizontal axis represents the last 12 hours air pressure recording (-12, -9, -6, -3 and 0 hour). The bars are plotted at each of the 5 steps and give the trend over therecorded period. The scale on the right compares the result. The "0" in the middle of this scale determines the current air pressure.The vertical axis represents the air pressure changes in inHg (+0.12, +0.06, 0, -0.06, -0.12. The “0” represents the current air pressure). The newly measured pressurewas compared to the previously recorded pressure reading. The pressure change is expressed by the difference between the current ("0h") and the past readings indivision of ±2 hPa or ±0.06 inHg. If the bars are rising, this indicates that the weather is getting better due to an increase in air pressure. If the bars go down it indicates adrop of the air pressure and the weather is expected to get worse from the present time "0".At every full hour, the current air pressure is used as a basis for the display of a new graph bar. The existing graph is then moved one column to the left.Note:For accurate barometric pressure trend, the Weather Center should operate at the same altitude. For example, it should not be moved. Should the unit be moved, forinstance from the ground to the second floor of the house, the readings for the next 48-60 hours shall be discarded.Note: The bar graph will scroll right to left regularly to prevent LCD burnout.WIND DIRECTION AND WIND SPEED MEASUREMENTIn normal display mode, the second section of the LCD shows the following wind data.• Wind direction (shown on the a compass scale of 16 divisions) and wind speed/ gust in Beaufort scale• Wind chill in °F or °C• Wind Speed in km/h, mph or m/s• Gust in km/h, mph or m/s (displayed when in Mode 2, by pressing the SET key shortly)RAINFALL MEASUREMENTThe total rainfall and 24 hour rainfall measurement is displayed in the fourth section of the LCD, in the unit of mm or inch.To View the 24-hour rainfall or the Total rainfall reading:1. In normal display, press SET key once and the display will shift to Mode 2.2. Press + key consecutively key to toggle between the 24-hour rainfall, Total rainfall and Rel. pressure reading.VIEWING THE HISTORY DATAThe weather station can store up to 140 sets of weather data which are recorded automatically at 3-hour intervals after the weather station is powered up, at the nearesttime of 0:00, 03:00, 06:00, 09:00, 12:00, 15:00, 18:00 and 21:00. For instance, if user has manually set the time as 14:52 after installing batteries, the first history recordwill be made at the coming 15:00 automatically. Then the second record will be on 18:00 and so on.Each weather record includes the Wind direction, Wind speed/ gust in Beaufort scale, Wind chill temperature, wind speed/gust, dew point, Outdoor temp and humidity,relative pressure, 24-hour rainfall and total rainfall, pressure history and weather tendency. Also, the time and date of recording will be displayed.Note:In order to acquire the correct time of recording of the history records, you shall manually set the current time as soon as installing batteries to the weather station.Afterwards, you should avoid changing the pre-set time as it will also alter the recorded "time of recording" of each history record, which may lead to confusion.24 hourrainfall iconTotalrainfallicon24 hour rainfallamountTotal rainfallamountAir pressurechanges in inHgAir pressurechanges in hPaPointer indicates thecurrently detected winddirectionText showing wind speedin Beaufort scaleWind speed or gust will be showThis alarm symbolindicates that the alarmis set OnWind chill