Identify the error
An apparent offset may come from alignment, configuration, wiring or source selection. Compare the display with the sensor and record the conditions before changing settings.
Follow the equipment procedure
Calibration methods vary by model. Record the original settings and follow the manufacturer manual rather than masking another fault with an arbitrary correction.
Check several conditions
Verify coherent readings on both sides and confirm that data reaches the intended screens. True-wind calibration also depends on other sensors and their quality.
Before changing a setting
Check physical sensor position, selected source and units. Record the current calibration so it can be restored. If readings jump or stop updating, resolve power, wiring or communication first: an angular offset cannot fix those faults.
After calibration
Follow the manufacturer-specific method and compare response in different orientations and conditions. Record the setting and date. For true wind, also check heading and speed sources; a vane correction does not compensate for inaccurate data from other sensors.