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3. Operation Instruction
3.1. Before measurement
(1). Connect the transducer with the unit, press to turn on,
LCD with full screen display with back light for 0.5 second, then
LCD display the last applied sound velocity, now the unit is ready
for use.
(2). Soun velocity selection
Press twice to entre sound velocity adjustment with
icon blinking, press and to select your desired
velocity, to finish the selection by press .
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Ready to use
Velocity selection
4.7 Influence of the material temperature
The size & sound velocity of material will change with the tem-
-perature, when the precision is critical, please make measur-
-ement in 2 samples of the material under the same temperat-
-ure to determine the proper reading resulting from the temp-
-erature. When taking measurement for steel parts in high
temperature, this method may be adopted to obtain the
correct reading.
4.8 High acoustic reduction material
For materials in fiber, poriferous or big granular, acoustic disp-
-ersion will cause the energy attenuation that may result in
abnormal readings(practically the reading less than the actual
thickness), in this case the material is not suitable for the unit.
4.9 Reference sample block
For calibration for the gauge, a given thickness or sound veloc-
-ity of the material is very import. Calibration needs at lest one
referring standard sample block. This gauge is provided with a
4.0mm sample block, please check for calibration operations.
In different material & situation, only one sample block may not
satisfy every calibration. The more similar sample block, the
more exact reading obtained. Ideally, referring block is a group
of different thickness and same material, by calibrating to the
referring block, the effect of variation of sound velocity will be
minimized. To get the most exact measure, a set of referring
block is very important.
When measuring thin material which thickness close to the
minimum limit range of this unit, please use a referring block to
define exact limit of this material. Do not measuring the
material that the thickness under the minimum limit.
VEL
DEL
ENTER
CAL
