Calibration; Relative Barometric Pressure Calibration Example - Ambient Weather OBSERVERIP 2.0 User Manual

2.10 Calibration

Select the Calibration tab to view your calibration data from the weather station.
Calibration of most parameters is not required, except for Relative Pressure, which must be calibrated
to sea-level to account for altitude effects. For more information on sea-level pressure calibration,
please reference note (3) below.

2.10.1 Relative Barometric Pressure Calibration Example

The following is an example of calibrating the relative pressure. Your results will vary.
1. The local relative pressure from TV, the newspaper, or the internet for the official station in
your area is 30.12 inHg.
2. From the Live Data panel, your absolute pressure (measured, and not corrected to sea-level)
reads 28.90 inHg.
3. Reference Figure 7. Enter the following offset in the Calibration panel for Relative Pressure
Offset:
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Figure 6
Relative Pressure Offset = 30.12 – 28.90 = 1.22
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