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Engineering Toolbox/Five-Point Calibration Check

Instrumentation & Calibration

Five-Point Calibration Check

Check the instrument indication at 0, 25, 50, 75 and 100% of calibrated span and assess every point against the specified tolerance.

Calibration setup

Enter the calibrated range, permitted error and the observed indication at each applied point.

% span

Calculation basis

Expected = LRV + (% point / 100) × (URV − LRV)
Error = Observed − Expected
% span error = Error / |URV − LRV| × 100

Scope

This release evaluates one ascending five-point set. It does not yet calculate hysteresis, repeatability, as-found/as-left comparison or uncertainty. Those belong in the full calibration worksheet, not in a hidden assumption.

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