Using the Elcometer 456 Zero Offset Calibration in accordance with ISO 19840 on Ferrous Substrates
The Elcometer 456 Coating Thickness Gauge sets new standards; providing reliable and accurate coating thickness measurements; helping you to become more efficient.
When using the Elcometer 456 Dry Film Thickness Gauge to measure the thickness of a coating on rough, blast coated surfaces; if you have access to a sample of the uncoated substrate you will be measuring, then you should undertake a rough surface (or 2-point) calibration.
However, if you don’t have access to the uncoated substrate, then you can use the Elcometer 456’s patented Zero Offset calibration method, which helps measure film thicknesses in accordance with ISO 19840.
ISO 19840 simply states that if a blast profile is unknown, you should calibrate on smooth steel and then subtract a predefined correction value from the measurement taken on the coated surface.