What is tiltmeter bias, and how do I remove it?
Tiltmeter bias (B) is the difference between the true angle and the angle reported by the tiltmeter. Think of a perfectly horizontal surface with an AGI tiltmeter sitting on it. If there were no bias, then the tiltmeter output would read 0 volts (assuming bipolar output). However, tiltmeters will read something different than the ideal 0 volts on a perfectly horizontal surface because of tolerances in the mechanical assembly (base plate, screws, standoffs, etc.) For detailed notes in Adobe Acrobat (.
