Main Functions; Measuring Principle - sauter TU 80-0.01US Instruction Manual

1.2 Main functions

- Capable of performing measurements on a wide range of materials including met-
als, plastic, ceramics, epoxies, glass and other ultrasonic wave well- conductive
materials.
- Four transducer models are available for special applications included coarse
grain material and high temperature applications.
- Zero adjustment function
- Sound velocity calibration function
- Two- point calibration function
- Two measurement modes: Single point mode
- Coupling status indicator showing the coupling status
- Battery indication indicates the rest capacity of the battery
"Auto sleep" and "Auto power off" function to conserve battery's life
-

1.3 Measuring principle

The digital ultrasonic thickness gauge determines the thickness of a part or a structure
by accurately measuring
The time required for a short ultrasonic pulse generated by a transducer to travel
through the thickness of the material, to reflect from the back or inside surface and be
returned to the transducer. The measured two-way transit time is divided by two to
account for the down-and-back travel path, and then multiplied by the velocity of sound
in the material. The result is expressed in following relationship:
thickness of the test piece
Where: H ----˃
sound velocity in the material
v ----˃
the measured round-trip transit time
t ----˃
TU_US-BA-e-1714
Scan mode

v t

H
2
5