RPR-4000
Operations manual
REV 8-21 49
5 Appendices
A. Caution for Transducers
Exercise care when using the RPR-4000 with transducers, especially for the
first time.
The high voltage and high duty cycle available from the RPR-4000 may make it
necessary to use modified or custom transducers. Experience has shown that transducers
with built in resonating inductors are most prone to failure because of either overheating
of the inductor or voltage breakdown.
Special transducers with at least a voltage rating of 1000 volts peak for the 8kW version,
1300 volts peak for the 15kW version and 1500 volts peak for the 20kW version are
required if operation at full output power is desired. In addition, if impedance matching
techniques are employed then voltages present at the transducer may be even higher.
During the development and evaluation of tests and measurements with new transducers,
careful monitoring of the excitation signal at the transducer is required.
During use at higher duty cycles, a method of removing heat from the transducer body
may be necessary. For some transducers, excessive heat may cause the material to
permanently lose its ability to generate ultrasound.
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