coatings inspection instrument calibration

Calibration, Verification of Accuracy and Adjustment… Synonyms or Differences in Terminology?

“Do I have to maintain inspection gage calibration and certification?  Why don’t they retain their calibration over time? Do I need to verify gage accuracy on a regular basis? How often? What is the difference between calibration and verification of accuracy?” These are common questions in the coatings industry.  A simple answer is that without routinely calibrating/certifying coating inspection gages using standards traceable to a national metrology institution and verifying the accuracy of your equipment prior to use, the gages only reveal...

psychrometer

The Psychrometer Duel: Old School vs. New School

Why do we need to measure ambient conditions? Ambient conditions are the prevailing conditions of air temperature, the moisture content of the air (relative humidity), and the temperature at which condensation will occur (dew point).  Most coating specifications have set requirements for monitoring and documenting results for surface and air temperature, relative humidity and dew point.  These conditions are to be measured and recorded in the specific areas where surface preparation and coating application will occur, then compared to the...