: Take the battery out for 30 seconds to fully discharge the unit, then re-insert it. Re-zero (Origin) : Close the jaws completely, then press and hold the button until the display reads 2. Check the Battery Low or unstable voltage often triggers false error codes. Replace with a Silver Oxide battery : Mitutoyo recommends using

Place a fresh CR2032 battery in. Low voltage is a frequent accomplice to E--05. Even if your old battery reads 3V, try a new one.

Before you panic and buy a new $200 caliper, understand why this happens. There are four main culprits:

: Press the ON/ZERO or ORIGIN button once the scale is clean to see if the error clears.

: Dropping the tool or severe impact can shift the internal encoder disc away from the sensor ring. Hardware Wear