Elcometer 500 User Manual page 18

10 CALIBRATING YOUR GAUGE (continued)
4 Place the probe on to the coated
sample, ensuring that it is flat against
the surface (Figure 12). The display will
show a thickness value which is
constantly updating.
The stability of the reading is indicated on the

signal strength indicator to the right of the
display. If the signal strength indicator is
green, it is a valid and stable reading. If not
green, ensure there is an adequate film of
couplant beneath the probe and that the
probe is seated flat against the surface.
Alternatively, position the probe nearby on a
different area of the test surface until a strong
signal is received.
5 Remove the probe from the surface.
The last reading is held on screen
(Figure 13). If not representative,
repeat Steps 3-4.
Excessive use of couplant can result in a

distorted reading when the probe is removed
from the surface. If this occurs, clean the
probe tip and coated surface, then repeat
Steps 3-4.
6 Press 'Adjust' and using the
softkeys, adjust the reading to the
known thickness value, then press 'Set'
to set the value (Figure 14).
At the end of the calibration procedure, the user is given the option to
save the coating calibration in the gauge memory for future use, see
Section 10.4 'Saving the Coating Calibration' on page en-19 for further
information.
The gauge is calibrated using the coating
thickness value entered and the derived
sound-velocity is displayed to the right of the
measurement screen, below the calibration
method icon (Figure 15).
Pressing 'Escape' at any time will exit the
calibration procedure without calibrating the
gauge.
en-17
R


Figure 12
Figure 13
Figure 14
Figure 15
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