Use a lint-free cloth with isopropyl alcohol (>90%). Gently wipe the beam (scale) surface and the underside of the slider. Do not use compressed air – it can drive debris deeper.
Ensure the battery contacts are clean and free of corrosion. Perform a Hard Reset mitutoyo caliper error code e--05
E--05 is not a battery or low-voltage error (though a dying battery can trigger it). It is a communication breakdown between the moving slider’s sensor array and the fixed scale. Use a lint-free cloth with isopropyl alcohol (>90%)
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