Precision Acoustics UT Series Product Instructions
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Precision Acoustics UT Series Product Instructions

Membrane hydrophone
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UT-Series membrane hydrophone
Precision Acoustics Ltd manufactures a wide range of hydrophones the ultrasonic
frequency range.
hydrophone, ideally suited for measurements of broadband ultrasonic signals in the
300 kHz to 60 MHz range. The UT-Series membrane hydrophone is designed to be
used in conjunction with a dedicated power supply that powers the submersible
preamplifier. The three items are supplied as a complete system by Precision Acoustics
Ltd.
Wherever the properties of the hydrophone are stated, they relate to the
hydrophone/preamplifier/power-supply combination (a hydrophone system).
Precision Acoustics Ltd
Hampton Farm Business Park, Higher Bockhampton, Dorchester, Dorset DT2 8QH, UK
t.
+44 (0) 1305 264669
e.
office@acoustics.co.uk
The UT-Series membrane hydrophone is a gold-standard
Document version
2.9
w.
acoustics.co.uk
PRODUCT INSTRUCTIONS
Date of issue
16/08/2018

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Summary of Contents for Precision Acoustics UT Series

  • Page 1 300 kHz to 60 MHz range. The UT-Series membrane hydrophone is designed to be used in conjunction with a dedicated power supply that powers the submersible preamplifier. The three items are supplied as a complete system by Precision Acoustics Ltd.
  • Page 2 NPL, London over the frequency range 300 kHz to 60 MHz. Further information on making acoustic measurements with hydrophones can be found on our website (http://www.acoustics.co.uk). In addition, Precision Acoustics Ltd offers training courses covering many aspects of acoustic measurement techniques and practices.

  • Page 3: Preparing For Measurement

    This mount is available from Precision Acoustics Ltd as an optional extra upon request. It is recommended that all hydrophones receive 1h soaking before use. It is recommended that the hydrophone is placed in the water tank at this stage before completing the rest of the setup process.
  • Page 4 MEMBRANE HYDROPHONE DC COUPLER WITH POWER SUPPLY MATCHING AMPLIFIER 50 Ω BNC cable 50 Ω INPUT DATA ACQUISITION DEVICE © Keysight Technologies Image shown for illustrative purposes only Connecting the hydrophone system Once the connections above are made, mains power should then be applied to the DC Coupler with Power Supply and the data acquisition device.
  • Page 5 ORIENTATION AND ALIGNMENT All hydrophones exhibit a directional response and the maximum hydrophone signal will be received when the plane of the hydrophone active element is orthogonal to the acoustic axis of the transducer (as shown in the image below). If the membrane hydrophone is rotated about the X or Y axes, there may be a reduction in the amplitude of received signal, even if the active element remains on the acoustic axis of the source.
  • Page 6 transducer and locating signal there. Once signal is found, move gradually further away from transducer (aligning hydrophone as necessary on the way) until desired field position is achieved. Noise. Where there is poor signal to noise ratio (SNR), it can sometimes be difficult to locate ▪...
  • Page 7 • Find the pressure field maximum – centred on your current position, move the hydrophone along a line parallel with the X-axis. Move the hydrophone to the location of the field maximum along that line. Repeat this type of line scan alignment in the orthogonal direction of the Y- axis.

  • Page 8: Troubleshooting And Faq

    Precision Acoustics for inspection. It is unlikely that the membrane can be repaired but a generous discount will be offered against a new membrane.
  • Page 9 How do I clean the calcium carbonate deposits from the hydrophone? ▪ o Immerse the hydrophone in lemon juice and then rinse in distilled or running water. Never use a cloth/towel/abrasive cleaner on the membrane Do I have to terminate the hydrophone output in 50 Ω? ▪...

  • Page 10: Product Support

    All information is based on results gained from experience and tests, and is believed to be accurate but is given without acceptance of liability for loss or damage attributable to reliance thereon as conditions of use lie outside the control of Precision Acoustics Ltd. Warranty Warranty will be for 12 months against defect of hardware component or manufacture only.

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