: Clean the beam with a lint-free cloth. Some users find that a light application of helps displace moisture and improves sliding. Isopropyl Alcohol (IPA)
Low voltage can cause the processor to "trip" and throw error codes. Check for a flashing "B" or low battery indicator.
In simpler terms: The caliper’s onboard chip cannot lock onto the absolute reference point on the stator (the glass/epoxy scale inside the beam). Without this reference, the caliper cannot calculate absolute position, forcing it into a permanent error state.