Tools & Microfiber2 min read

A Check Standard for Detecting Drift in Routine Coating Measurements

Use a stable check standard and a recorded response rule to detect drift in routine coating measurements between formal calibrations.

Updated · NANOLAB Knowledge

Editorial illustration: Lighting for Paint Correction and Ceramic Coating Inspection
Editorial illustration

A check standard helps reveal whether a measurement process is behaving as expected over time. It complements calibration by providing routine evidence under the conditions in which the instrument is used.

Select a suitable reference

Choose a stable artefact or material appropriate to the measurement range and method. Store and handle it so its own condition does not change unnoticed. A coated sample that is actively ageing may be unsuitable as an assumed stable standard.

Measure it consistently

Record instrument, operator, date, environmental conditions and result. Use defined positions and orientation where relevant. If several critical measurement levels exist, one standard may not cover them all.

Establish a response rule

Observation Action
Within established behaviour Continue under the measurement procedure
Unexpected shift or spread Investigate standard, setup and instrument
Confirmed measurement problem Assess affected product results and corrective work

Do not adjust away every unusual reading

Automatic recalibration or deletion of a result can erase evidence of a real problem. Follow the documented investigation process and retain the original observation. NIST’s measurement-control guidance emphasises check-standard records as part of process control. The resulting history can support calibration planning and identify when recent coating measurements need review, but it does not make a check standard a substitute for traceable calibration.

Technical references

The sources below support the stated concepts or describe their own methods. The worked scenarios are editorial examples, not NANOLAB test results.

Ask NANOLAB about your surface and intended use. For application and care, use the current instructions for the exact product.