DIGITAL CALIPER ZERO CHECK: KEEP RESOLUTION AND CALIBRATION SEPARATE Tool ID / model / instructions / units / display increment: Original zero check / origin action if required: Calibration record / measuring-mode scope: Part / feature location / measuring mode / preparation: Original readings / repeats / reasons: Applicable requirement / supported comparison / unresolved question: Documentation aid only. Follow applicable vehicle, product and instrument instructions. Not a calibration certificate, real measurement or service authorization.