Setting Up The Gauge - Elcometer SG80BDL Operating Instructions Manual

6.1 Pulse-Echo Mode (P-E)
This mode measures from the initial pulse (sometimes referred to as an artificial zero) to the first
echo (reflection). This mode only requires one reflection and it is therefore the most sensitive mode
for measuring weak reflections (flaws) typically found when measuring heavily corroded metals. If
this mode is used to measure a coated sample, then the thickness of the substrate plus coating will
be measured.
Note: Rough surface conditions can have an effect on the overall accuracy in this mode. If the
surface condition is in question, the pulse-echo mode should be used in conjunction with performing
an off block automatic zero as the temperature gradient changes.
6.2 ECHO-ECHO MODE (E-E), THRUPAINT™
This mode measures between two reflections. This technique is commonly used to eliminate errors
from surface coatings and also to make measurements in multiple layered materials. The
disadvantage is that two echoes are needed which requires a much stronger echo (reflection).
ThruPaint™ mode cannot be used for flaw or pit detection. Therefore, inspectors may need to use
this mode in conjunction with the standard coating off (pulse-echo) flaw detection mode for some
applications. Chassis tubing inspectors and sanctioning bodies will typically use the echo-echo
mode for tubing with powder coatings, and pulse-echo mode for tubing without coating. This
combination of using both modes is ideal for very detailed inspections.

7 SETTING UP THE GAUGE

7.1 Transducer - Setting Type Of
The first step in using your gauge is to select the transducer type from the predefined transducer
list stored in the gauge by frequency and diameter. By selecting the transducer type from this
predefined list, your gauge will recall specific properties about the transducer.
Once the transducer has been selected, your gauge will recall this transducer type every time it is
switched on. The type will only change if you select another transducer type from the list, or if you
select a previously saved setup. However, your gauge will continue to take you through these steps
each time it is switched on. The transducer type previously selected will be highlighted every time
the transducer type screen is displayed.
Follow these steps to select your transducer type:
1. Press , scroll to the PROBE menu, scroll to the TYPE function
and then press
A list of transducers is displayed.
2. Use the and
appropriate type is highlighted and then press
Note: Ensure the transducer type you select is the same as the
transducer plugged into your gauge; failure to do this will result in
erroneous measurements.
3. When the CONFIRM screen displays 'APPLY NEW TRANSDUCER TYPE', press
overwrite the existing transducer type with the newly selected transducer type.
9
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arrows to scroll through the list until the
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TYPE
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