Calibration Adjustment - Elcometer Elcomotor 312 Operating Instructions Manual

4 CALIBRATION ADJUSTMENT

Calibration adjustment is the process of setting the gauge to known values of thickness.
Although your gauge was calibrated at the factory, periodic calibration by the user is a requirement of quality
management procedures such as ISO 9000 and other standards.
Note: FNF gauges must be calibrated in both the ferrous mode and in the non-ferrous mode to ensure
accuracy of reading.
4.1 EQUIPMENT REQUIRED
To ensure accurate calibration you will need access to an uncoated sample of the automotive body to be
measured and the foil set supplied with your gauge.
If you do not have access to an uncoated sample, ferrous (steel) and non-ferrous (aluminium) substrates
(checkpieces) are available as accessories from Elcometer. See "Spares and accessories" on page 11 for
ordering details.
The measured foil set supplied with your gauge consists of the following nominal thickness values:
• 125 µm (5 mil)
• 250 µm (10 mil)
• 1000 µm (20 mil)
When adjusting the calibration, choose a foil or combination of foils to give a thickness value above the
thickness to be measured. For instance, for measurements up to 100 µm (4 mil), choose the 125 µm (5 mil)
foil. For measurements up to 1000 µm (40 mil), use the 1000 µm (40 mil) foil.
Note: Ensure that the foils are clean and that there is no dirt or dust between the foils, as this will cause
errors.
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