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D1763 – normal-beam dual-crystal ultrasonic transducer for high-temperature applications 5 MHz

D1763 – normal-beam dual-crystal ultrasonic transducer for high-temperature applications 5 MHz
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D1763 – normal-beam dual-crystal ultrasonic transducer for high-temperature applications 5 MHz - 1

Ultrasonic piezoelectric transducer D1763 DATA SHEET Main technical specifications Transducer type: Nominal frequency: Nominal echo pulse duration: Nominal relative band width: Nominal sensitivity: Piezoelement diameter: Nominal echo pulse delay in protector: Nominal piezoelement capacity: Connector type: Operation temperature range: Dimensions: Weight: Contact straight beam double 5 MHz 1.2 µs 65 % -70 dB 12 mm 0.15 µs 1500 ± 150 pF LEMO 00.250 from 0 to +350 ◦ C 23×44×15 mm 22 g Measurement conditions and used equipment Excitation: Rectangular pulse with amplitude 20 V and duration 100 ns, equal to half-period of nominal frequency oscillations. Amplifier with 0.01-15 MHz bandwidth and 400 Ω input impedance. Effective noise level, normalized to the amplifier input level, is less than 20 µV. Damping resistor: 100 Ω (connected in parallel to the transducer). Single LEMO-LEMO with wave resistance 50 Ω and 1.2 m length. Calbration blocks: Standard parallel-sided steel samples, ultrasonic longitudinal wave velocity 5910 m/s, with thickness 100 mm, 50 mm, 30 mm, 20 mm, 10 mm, 2.5 mm, 1.5 mm, 1 mm, 0.7 mm. Measurement results Spectral amplitude, rel. units Backwall echo pulse for 20 mm thickness and its spectrum

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D1763 – normal-beam dual-crystal ultrasonic transducer for high-temperature applications 5 MHz - 2

Reverberation noise characteristics (RNC) for the transducer without acoustic load and the curve of backwall echo signal level for steel samples of different thickness The level of 0 dB corresponds to the excitation pulse amplitude. Calculated parameters and acceptance results Parameter Work frequency (Mean of border spectrum frequencies) , MHz Relative spectrum bandwidth (at -6 dB level) , % Sensitivity (bottom echo pulse and excitation pulse amplitudes’ ratio), dB Echo pulse amplitude, mV Spectrum maximum frequency, MHz Lower spectrum frequency (at -6 dB level) , MHz Upper spectrum...

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