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3
Sound velocity adjustment
Press one time to entre velocity adjustment with
stored velocity unit blinking, press and to adjust
the velocity to obtain desired value then press
to finish the adjustment. The revised velocity will be saved
into the unit.
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3.2. Calibration
On normal status, press for 3 second CAL symbol
shows in LCD with 5900 m/s velocity and 4.00 mm display.
Use the standard sample block for calibration, until CAL
symbol disappeared, press or to entre
measurement mode.
Ready to calibration
Ready to use
After adjustment
Before adjustment
4.Measurement Tips
4.1 Cleaning surface
Before measuring, the dust, dirt, rusting and grease etc that
adheres on the hardware/workpiece must be removed off and
cleaned.
4.2 Decreasing the roughness of surface
Too rough surface may result in measure error/ fault reading.
Please try to make the surface smooth by milling, polishing,
filling or using high viscosity coupling agent.
4.3 Rough machining surface
The regular tiny texture/slots resulting form rough machining
process may cause error, and the compensation method is the
same as in 4.2, adjusting the angle between the crosstalk segr-
-egating board of the transducer a metal membrane crossing
the detector bottom centre and linear texture/slots (parallel or
vertically) may also get a better result.
4.4 Measuring pipe and tubing
When measuring cylindrical parts to determine the thickness
of the pipe wall, orientation of the transducers is important. If
the diameter of the pipe is large than approximately 4 inches,
measurements should be made with the transducer oriented so
that the gap in the wearface is perpendicular (at right angle) to
long axis of the pipe. For smaller pipe diameters, two measure-
-ments should be performed, one with the wearface gap perpe-
-ndicular, another with the gap parallel to the long axis of the
pipe. The smaller of the two displayed values should then be
taken as the thickness at that point.
4.5 Complex shape material
For complex shape material measurement, please refer to the
4.4, the smaller of the two reading should then be taken as the
thickness.
4.6 Non-parallel surface
To get a satisfying ultrasonic response, the surface must have
its one measuring side parallel with another, otherwise will
obtain wrong result.
VEL
DEL
ENTER
CAL
ENTER
CAL
