Calibrating Your Gauge - Elcometer 500 User Manual

9 CALIBRATION METHODS (continued)
TABLE 2: CALIBRATION METHODS (continued)
Calibration
Method
Velocity Entry

10 CALIBRATING YOUR GAUGE

The gauge should be calibrated each time a different probe is used or a
different type of coating is measured.
10.1 BEFORE YOU START
1 Switch the gauge on - see Section 4.3 on page 5.
2 Connect a probe - see Section 4.4 on page en-6.
3 Oil the sensor plate or replace the probe tip if required - see
Sections 4.5 and 4.6 on pages en-6 and en-7.
The gauge will inform the user when oil is required and when the probe tip is

worn or damaged and should be replaced.
10.2 USING 1 POINT CALIBRATION
This procedure requires a sample of the coating with a known thickness,
measured by some other means such as a dry film thickness gauge.
If a sample is not readily available, one can be created using the
Elcometer 500 Coating Calibration Mould (CCM), see Section 11 on
page en-22.
1 Press Menu/Calibration/Cal Method and select '1 Point'. If '1 Point' is
already selected, simply press Menu/Calibration/Calibrate.
The calibration method currently selected is indicated by the icon to the right

of the display.
2 To ensure accurate and repeatable readings and to check for probe
wear, the user will be prompted to zero the probe; clean the probe
surface, hold the probe in free air and press 'Zero'.
The 'Zero Probe' procedure is not only part of the calibration process, it can

also be performed at any time to check that there is sufficient probe tip oil on
the sensor plate and the condition of the probe tip. See Section 12 ' Zeroing
the Probe' on page en-24 for further information.
3 When prompted, apply couplant to the coated sample.
If a sample with a coating of known thickness is not readily available, one can

be created using the Elcometer 500 Coating Calibration Mould (CCM), see
Section 11 on page en-22.
www.elcometer.com
Icon Description
If the sound-velocity of the coating is known,
simply enter the value. See Section 10.3 'Using
Velocity Entry' on page en-18 and Section 11
'Using the Coating Calibration Mould' on
page en-22.
R
en-16