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101

Virtual Weather Station User's Guide

-11- 03/07/06

6 Virtual Weather Station Base

Edition Features

6.1 The Assistant

Menu Shortcut: Help uu Assistant

If you are a new user, it is advisable that you completely

run through the assistant to understand all of the features of

Virtual Weather Station.

When launching Virtual Weather Station for the first time,

the Assistant will automatically be displayed.

Figure 1 - The Assistant

6.2 Conversions

Menu Shortcut: Settings uu Conversions

You may select the units of measure in which the data is

displayed throughout the software. All program windows

and files will display these units.

Figure 2 - Unit Conversion Settings

6.3 Calibration

Menu Shortcut: Settings uu Calibration

Virtual Weather Station allows you to calibrate for

improved accuracy. In addition, if your wind speed sensor

is below the expected reading due to bearing life, or the

anemometer is obstructed by trees, these errors can be

adjusted to provide realistic values.

The calibration takes the form of the following equation:

Calibrated Value = Gain x Measured Value + Offset

Reference Table 2 - Examples of Calibration. The table

provides solutions for typical measurement problems.

NOTE - changing the calibration settings in Virtual

Weather Station will not adjust the parameters displayed

from the console.

Note – setting the gain to 0 will cause the value to always

read 0. Only set the gain to 0 if you do not have the sensor

in your system.

Problem Solution

The wind speed is reading

50% low because the sensor is

obstructed by trees. In other

words, when the wind speed

reads 3 mph, it is actually 6

mph.

Set the wind speed gain

to 2.00.

One of my temperature

sensors is off by 3 degrees

Set the temperature

offset to 3.00

I installed my anemometer

incorrectly, and when it points

north, it should measure south

Set the wind direction

offset to 180.00

Table 2 - Examples of Calibration

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 100 101

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Ambient Weather WS-091-C Guide de l'utilisateur Page 11

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