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PET
– piezoelectric transducer;
SPG
– sound pulse generator;
K
– keypad;
LCD
– liquid crystal display;
A
– amplifier;
TIM
– time interval meter;
PS
– power supply.
Fig. 3 - Schematic structure of UTG-8 thickness gauge
3.7
The thickness gauge can be operated in the following modes:
− "Measurement" – basic operation mode of the gauge. The product thickness is
measured in this mode;
− "0 calibration" – this mode is designed to compensate the time of ultrasound
propagation in the transducer wedge during thickness measurement;
− "V calibration" – this mode is intended for setting up the velocity (V) of
ultrasound propagation in the material of test product;
− "T calibration" – this mode is used to determine the velocity of ultrasound
propagation in the material of test product at a known thickness (T);
− "Two point calibration" – this mode is designed to compensate the time of
ultrasound propagation in the transducer wedge (estimating the delay in the
transducer wedge) and to determine the velocity of ultrasound propagation in the
material of test product by two thickness calibration gages.
Electronic unit
SPG
PET
A
12
K
LCD
Microprocessor
TIM
PS
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