You set the WSO100 atmospheric pressure offset using Maretron's DSM150 or DSM250 display in the following way:
- Enter menu mode, scroll to "Configuration…" and press < Enter >
- Scroll to "Device Configuration…" and press < Enter >
- Scroll to the row containing the WSO100 and press < Enter >
- Scroll to "Barometric Pressure:" and press < Enter >
- Scroll up or down until you set the appropriate barometric pressure and press < Enter >