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Any marks on the surface, such as scratches, grease, dust or finger marks, will invalidate the calibration
value assigned to the standard.
It is important that the calibration tile has an up-to-date certificate and the normal renewal period is 12
months. However, it should be noted that if successive calibration certificates give the same value for the
tile, extension of the renewal period to 24 months is permitted. The tile must be calibrated at both angles
when it is to be used with dual angle gauges.
Standards can be re-calibrated by returning the standard to Elcometer, your local Elcometer supplier or to
a recognised gloss calibration facility such as BAM (Germany) or NRC (Canada).
10.2 Gauge
The Elcometer 402 should always be checked to ensure that the metal base is clean. Care must be taken
to ensure that the base remains free of any damage. The optical cavities and lenses must also be free of
dust or any other contamination.
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