6
TD_US-BA-e-2020
6.
Measuring procedure
1. The power button 3-4 is pressed to switch on the unit.
2. The mm/inch button 3-3 is pressed to select the correct measuring unit.
3. The sensor 3-7 is placed on the material surface to be measured, provided that
the material code has been selected correctly. Make sure that the "Measuring
process in progress" indicator is visible and the character
((-))
3-11 appears.
The display shows the measurement result.
4. The measurement result is retained until a new measured value is measured.
The last value remains on the display until the instrument is switched off.
5. The device can be switched off either by pressing the on/off key or by the auto
power off function, which becomes active one minute after the last key is
pressed.
7.
Measurement with adjustment of the ultrasonic speed
1. When the VEL- key 3-13 is pressed, the display shows the last stored ultrasonic
speed.
2. Coating thickness & material thickness measurement at known ultrasonic
speed:
The speed of sound can be adjusted by pressing the plus or minus key. This
changes the value shown on the display up or down. The increase is initially
10m/s. If the Plus or Minus key is pressed down for more than 4 seconds, the
increase is 100m/sec each time.
3. A little contact gel is applied to the material to be measured. Now the sensor 3-
7 is pressed onto the surface to be measured. On the display the coating
thickness can now be read, provided that the coupling symbol appears on the
display. If the ultrasonic velocity of a certain material is known, it is easy to
measure the coating thickness by using step 7b).
4. Layer thickness & material thickness measurement at unknown ultrasonic
speed:
Take a material sample with known layer thickness or material thickness.
Repeat the 1st step (setting the ultrasonic speed) and 7c) until the measured
value corresponds exactly to the known layer thickness. In this case, the set
value is the ultrasonic velocity of the material to be measured. Now any
unknown layer thickness of the same material can be measured.
5. To change the ultrasonic speed, press the VEL button 3-13. To enter the
measuring mode, press this key again or wait until the instrument automatically
displays '0'.
