Leo, Camilla

Leo noticed when comparing the data we took in July 85917 to last years OMC scans with different ZM curvature settings 80010, that the minimum value ZM4 can reach has changed. Over ~ an hour or so, the strain gauge can drift around 0.1V, their total ranges are 7.7V so maybe these changes of 0.2/7.7=2.5% are not too surprising.

• In September 2024, 0V on ZM4 was a strain gauge of 2.1V. Drifted to 2.05V after 2 hours.
• In December 2024, 0V on ZM4 was 2.15V and 0V on ZM5 was -5.40V. 185V was 9.25 on ZM4 and 1.95 on ZM5.
• In July 2025, 0V on ZM4 was 2.3V and 0V on ZM5 was -5.45V. 195V was 10 on ZM4 and 2.35 on ZM5