-04-
-13-
5. Precautions for accuracy
5.1 For very thin material
Any ultrasonic thickness gauge, when the thickness of the mat-
-erial 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 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. Take care for measurement while measuring the
known rusting spot/suspicious area. Or using sound insulation
boardcelotex to locates the spot in different testing angles.
5.3 Identify different velocity with vary material
A fault reading would obtains, when measuring the hardware
with the velocity calibrated by prior material. So a correct
velocity should be adopted. The fault reading may also result
form the difference between the actual velocity with the calibr-
-ated value.
5.4 Abrasion fo the transducer
Because the transducer is made of propylene, long period use
will cause the surface of transducer became more rough which
will decline the sensitivity lead to the wrong reading. Please
polish the surface with sand paper or whetstone to assure the
smoothness and parallel. If the reading still unsteady, the tran-
sducer should be replaced with new one.
5.5 ZERO function
ZERO(calibration) is used to calibrate the unit with the standard
block on the panel, do press this key for calibration with other
materials or will the wrong measuring will take place.
4.11. Selection of transducer
ITEM
Characteristic
Range
Operation
temperature
4.10 The wear of the transducer will effect the measurement,
when below situation happen, please replace the transducer:
A
only display one reading when measured different thickness
B
reading display without take measurement
General-purpose
Thin workpeice
General-purpose
1.00mm to 300.0mm(steel)
1.00mm to 50.0mm(steel)
1.00mm to 300.0mm(steel)
-10 to 60
-10 to 60
-10 to 60
2. Specification
Measuring range: 1.00 to 300.0mm(steel)
Accuracy:
(1%H+0.1mm)
Resolution:0.01mm(1.00 to 99.99mm)
0.1mm(100 to 300mm)
Minimum limit for tube measuring
steel
:
15*2.0mm(
6 transducer)
20*3.0mm(
10 transducer)
Sound velocity:1000 to 9999m/s
Thickness
20mm, accuracy of velocity:
1mm/H
100%
Thickness
20mm
, accuracy of velocity:
5%
Operating environment :
Operation temperature: 0 to 40
Temperature of workpiece: < 6 0
Relative Humidity: <90%
Do not apply in violent vibration / erosive material
Avoid impact and humidity
Power supply:1.5V AAA * 3 PCS
Operation current:
35mA (with back light on)
1 0 m m
6 m m
1 0 m m
