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Guides in this topic
124 guides
pH Test Strips vs a Meter: Choose Enough Resolution for the Decision
Choose between pH strips and a meter according to the required decision, sample limitations and measurement resolution.
Measuring Hose Flow with a Collection Test: Litres per Minute in Practice
Estimate hose flow with a timed collection test, calculate litres per minute, and keep flow measurement separate from pressure.
Can Rinse-Water Conductivity Prove a Surface Is Detergent-Free?
Use rinse-water conductivity as a process observation while recognizing why it cannot prove that every detergent residue is absent.
Measurement Resolution vs Uncertainty: Why Extra Digits Do Not Prove a Coating Difference
Distinguish instrument resolution from measurement uncertainty and avoid ranking coatings by differences the test cannot reliably resolve.
Gloss Retention Calculations: Report the Baseline as Well as the Percentage
Calculate gloss retention, preserve the initial and final readings, and avoid hiding baseline differences behind a percentage.
Standard Deviation vs Standard Error in Coating Test Reports
Distinguish standard deviation from standard error and label coating-test error bars so process variation is not hidden.
Ceramic Coating Fill Checks: Verify the Scale at the Working Load
A scale can appear stable at zero while giving unsuitable results at the actual bottle load. Verification should cover the range used in the process.
Paint Thickness Readings Near an Edge: Check the Gauge’s Limits
Measurements near a panel edge may be affected by geometry. An unusual reading needs method verification before it becomes a polishing decision.
Curved Body Panels: Verify Paint Gauge Fit Before Comparing Readings
Curvature can affect probe seating and measurement response. A gauge approved on flat reference plates may need application-specific verification.
Coating Roughness Reports: Ra and Rz Describe Different Profile Features
Ra and Rz are different roughness parameters. Their values cannot be exchanged simply because both are reported in micrometres.
Coating Thickness on Plastic: Why a Metal-Substrate Gauge May Not Help
A gauge designed around a metal substrate cannot automatically measure a coating on plastic. The measurement principle must suit the entire material system.
Paint Gauge Reference Shims: Keep Damage Out of the Verification Process
A damaged or dirty reference shim can undermine an instrument check. Reference condition matters as much as entering its nominal thickness correctly.