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2. Operation instruction
2.1 Operation area condition: this unit can measure hardware all that
areas is equal to or bigger than the transducer’s area. To measure the
slim parts axially that is not vertical to the surface, the area shall not be
too small, otherwise the error measure may happen.
2.2 Curved surface condition: When the material is curved surface like
boiler wall or tubing, the curvature radius must be more than or equal to
10 mm, and the wall thickness must be more than or equal to 3 mm. This
requirements is referring in steel material, as for the curve surface of
other materials measuring requirements we still can not provide exact
data, we highly appreciate if you feedback us and share with your prec-
ious experience.
2.3 Roughness condition: This gauge wildly applies upon the rough
hardware/material, for most cases, our provided transducer can make
exact measurement. However, if the roughness is too big due to the rust
etc. the error measure may happen, in such case, please try to minimize
the roughness or select the 2.5MHz transducer. If the transducer is worn
out, please re-purchase on the local distributor.
In most situations, using one referring block will get a satisfying
measurement. This referring block must be the same material with
same thickness as the parts to be tested. The referring block should
be read out the thickness by micrometer.
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( 1.2mm for steel material). Do not measuring the
material that the thickness under the minimum limit.
When material is a complex alloy in a large size. A block that has a
similar thickness with the material should be selected for calibration.
For most hardware by forging / casting, they have different inner
structure, so that the sound velocity slight different. To reach the exact
reading, the referring block has similar structure as the hardware.
In comment measurement, you check the sound velocity on the table
stated on this manual instead of taking calibration for the referring
block. However, this table just for reference, sometimes the sound vel-
ocity will be different cause by different physical / chemical factors. The
sound velocity of mild steel is adopted on the reference table.
This gauge with the function to measure the sound velocity, so the
velocity can be obtained before thickness measurement, and then pro-
ceed with measurement of thickness.
5. Precautions for accuracy
5.1 For very thin material
Any ultrasonic thickness gauge, when the thickness of the material to
be measured is less than the minimum limit the fault reading will occurs.
Using sample block compare method to get a minimum limit of this ma-
terial.
In measuring the thin material, an error may happen that the reading
is two times as the actual dimension. Another error which display the
reading much more bigger than the actual. To prevent the wrong reading
by double check out the minimum limit in the thin material.
5.2 For stained, rusting surface
The stained/rusting surface on the contra side will occurs the ruleless
wrong readings. Sometimes a small stained spot is hard to find out.
Use and keys to make a quick adjustment for the sound velocity
/thickness,and a quick recall to the stored data.
Coupling status indication: Observing the coupling icon to learn if
the coupling is accomplished or not.
10 thickness measurement storage and recall function is available,
which facilitates the height work or working in wild area.
Sound velocity measurement: With a given thickness by a sample
hardware to measure the sound velocity, which avoid the further
conversion or consultation of the table.
12 sound velocity for different material
Low battery indication
Auto power off mode designed to conserve battery power.
More than 10000 times long lift keys.
Manual power off: Press the “ ” button to turn it off
