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Note: At any time during the gauge calibration procedure (IN, MM, IN/µs, or M/s flashing in the display),
pressing the SCAN (PG70) or CLR (PG70DL) will restore the gauge to the factory default sound-velocity for
steel, 5918 m/s (0.233 in/µs).
Material composition (and thus, its sound-velocity) sometimes varies from batch to batch and from
manufacturer to manufacturer. Calibration to a sample of known thickness will ensure that the gauge is set
as closely as possible to the sound-velocity of the material to be measured.
6 MEASUREMENT MODES
The gauge has three measurement modes; echo-echo, interface-echo and automatic.
E
-
: The gauge has the ability to read thin metals from 0.15 mm to 10.14 mm (0.006" to 0.399").
CHO
ECHO
The echo-echo mode also allows the user to measure the thickness of metals that have been previously
coated or painted on the surface. This enables the user to determine the thickness of the metal without
having to remove the paint.
I
-
: The gauge has the ability to read thicker metals from 1.65 mm to 25.4 mm (0.065" to 1.0"),
NTERFACE
ECHO
plastics and other difficult materials.
A
: In Automatic, the gauge will automatically switch between modes according to the different
UTOMATIC
materials being measured.
P
: Plas mode can be used to measure thin plastics using a special graphite tip - see "Spares &
LAS
Accessories" on page 30.
The automatic (Auto) mode will generally be the mode of choice for the majority of common applications
with the following exceptions:
•
The gauge should be set to echo-echo mode when through-coating measurements are required.
•
The gauge should be set to interface-echo when plastics above 1.52 mm (0.060") are being
measured.
14
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