Measurement Options - Elcometer CG30 Operating Instructions Manual

2. Place transducer onto surface of material to be measured
Press the transducer wearface into the couplant. Moderate pressure on the top of the
transducer using the thumb or index finger is sufficient; it is only necessary to keep the
transducer stationary and the wearface seated flat against the surface of the material.
3. Read display
If six or seven bars of the stability indicator are showing, the display will be reading the correct
thickness of the material directly beneath the transducer.
If the stability indicator has fewer than five bars showing, or the numbers on the display seem
erratic, check to make sure that there is an adequate film of couplant beneath the transducer,
and that the transducer is seated flat against the material. If the condition persists, it may be
necessary to select a different transducer (size or frequency) for the material being measured.
The gauge will perform four measurements every second when the transducer is in contact
with the surface of the material. The display is updated as each reading is taken.
4. Remove transducer from surface
The display will show the last measurement made.
Note: Occasionally, a small film of couplant will be drawn out between the transducer and the
surface as the transducer is removed. When this happens, the gauge may perform a measurement
through this couplant film, resulting in a measurement that is larger or smaller than it should be. This
phenomenon is obvious when one thickness value is observed while the transducer is in place, and
another value is observed after the transducer is removed. If this happens, take the reading again
using less couplant.

7 MEASUREMENT OPTIONS

7.1 SCAN MODE
Although your gauge excels at making single point measurement, it is sometimes desirable to
examine a larger area, searching for the thinnest point. The gauge includes a feature called Scan
Mode which allows it to undertake that function.
The mode increases the overall repetition rate from 4 readings per second to 8 readings a second.
This feature enables you to make scanned passes over an arbitrary length of test material while still
maintaining a reasonable representation of thickness over the scanned area/region. This feature
can be used in conjuction with the alarm limit feature.
To switch scan mode on/off:
Model CG30/CG50
1. Switch on the gauge.
2. Press UP/SCAN key to toggle the status of
the Scan mode.
The gauge will display SCAn
On
depending on which mode the gauge is
in.
3. Repeat step 2 to switch scan mode on or off.
1. Switch on the gauge.
2. Press MODE key to activate features and
settings.
OFF
or SCAn
3. Press UP and DOWN arrow keys to scroll to
SCAn symbol.
The gauge will display SCAn
On
in.
4. Press SEND key to switch scan mode on or
off.
5. Press MODE key when finished.
Model CG50DL
depending on which mode the gauge is
OFF
or SCAn
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