Accessories; Test Principle - Novatest ZBL-U5 Series Instruction Manual

Manual for ZBL-U5 series of Ultrasonic Detector

2.1.4 Accessories

2.1.4.1 Power adaptor
Connect input plug of power adaptor with 200-240V AC power
and its output plug with power plug of host for supplying power to the
instrument and charging the internal battery as well.
2.1.4.2 Other attachments
Refer to the packing list for more retail.

2.2 Test principle

2.2.1 Cross-hole sonic logging for testing pipe
integrity
The basic principle of ultrasonic transmission method for testing
pile integrity is: excite high frequency elastic pulse wave through
ultrasonic pulse emission source, use high precision receiving system
to record the fluctuant features of this pulse wave transmitting in
concrete; when concrete has discontinuous or damaged interface
inside, defect surface forms wave impedance interface, therefore,
when wave arrives to such this interface, caused transmission and
reflection of wave obviously decreases the received transmission
energy; when concrete has serious defects such as looseness,
honeycomb or cavitations, wave scattering and diffraction will be
caused; compactness parameters of concrete in test ranges will be
obtained based on the first arrival time of wave and features of energy
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