Davis Weather Wizard III Technical Support |
| Below is help and answers to questions regarding Davis Weather Wizard III. If you have any other questions please email us by clicking on the link provided. |  |
Q: Sometimes I see my wind speed jump to an extremely high number, like 126 mph. This occurs most often when it’s raining. |
 | | | | |  | When this occurs, the first thing you should do is unplug the eight-foot WeatherLink cable from the serial port adapter at your PC or Macintosh. As you do this, observe the wind speed. The wind speed should immediately return to normal. If it does, the erroneous high wind speed was caused by a faulty or bad ground at the outlet your PC or Macintosh is plugged into. Consult your local electrical contractor on how to secure a better ground at this outlet.
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Q. How is the wind speed calculated? |
| | | | | | The wind speed is determined by counting pulses over a sample period. The sample period is 2.25 seconds. The number of pulses per sample period is equal the wind speed in MPH. If you are displaying the wind speed in other units, such as meters per second, kilometers per hour or knots, the derived MPH is multiplied by the appropriate conversion factor: 1 mph = 1.6093 kph = 0.44704 m/sec = 0.8690 knots.
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Q. Why is my daily rain total the same as my yearly rain total? |
| | | | | | The two rain totals are technically not "daily" and "yearly." They both will accumulate forever until the user specifically clears them from the weather station or software. How often the user clears them determines their interval. They can be daily, weekly, monthly, yearly, per storm, or virtually any span of rain total.
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Q. My readings aren't quite what I expected them to be. |
| | | | | | Be very careful. Comparing to readings obtained from the television, radio, newspaper, or a neighbour is not the most accurate method of verifying your readings because they are not located in your specific environment. Davis's weather stations are carefully tested at the factory and conform to the specifications listed in the back of your manual.
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