Laboratory Equipment Calibration Guide
A metrological guide outlining standard calibration procedures to satisfy ISO/IEC 17025 laboratory quality audits.
What is it?
Equipment calibration is the process of comparing a testing instrument's read values against a certified master reference standard. It determines measurement error, provides correction coefficients, and certifies load cell, LVDT, and oven accuracy.
Why it is needed
Even the strongest mechanical frame is useless if its sensor reports incorrect load values. Regular calibration prevents testing errors, assures legal structural compliance, and satisfies NABL audit checklists.
How to Setup & Test: Step-by-Step Workflow
Master Instrument Alignment
Mount a certified proving ring or load cell in series with the compression or tensile frame.
Incremental Load Application
Apply forces in 5 to 10 ascending and descending intervals, noting values at each step.
Dial Gauge Micrometer Calibration
Use calibration benches to audit dial indicator accuracy over its complete stroke range.
Error Matrix Correction
Compute force/displacement error matrices, output calibration certificates, and apply adjustments to digital controllers.
