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Before the transducer is placed on the surface, put a small amount of couplant supplied with
the gauge on the surface of the material. Typically a single drop is sufficient.
2. Place transducer onto the surface of the material to be measured
Place transducer onto the surface of the material to be measured
Press the transducer wearface into the couplant. Only moderate pressure is 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:
•
adjust the gain, or
•
select a different transducer (size or frequency) for the material being measured.
The gauge will perform a number of 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. This phenomenon can be seen 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.
10 GATES
10.1 INTRODUCTION
Further information on gates may be found on the Elcometer NDT Knowledge Centre on
www.elcometerndt.com
10.2 ADJUSTING THE GATES
The quickest way to adjust the settings of the three gates is directly from the hot menu. Alternatively,
adjust the values using the menus:
1. Press MENU, GT1, GT2 or GT3 menu and then highlight the setting you wish to adjust.
2. Adjust to suit the measurement application.
3. Press OK to set the value and return to the menu screen, or ESC to cancel.
4. Press MEAS to return to the measurement screen.
11 THRUPAINT™ MEASUREMENT TECHNIQUE
Your gauge is equipped with a ThruPaint
technique to allow measurement of the material thickness beneath a coating. This is useful for
checking the material thickness of a painted object.
™
measurement mode that uses a multiple echo
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