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Hydrophone Handbook

              9. Best Practices

 Some key items to keep in mind when setting up your
 measurement:

 9.1 Handling:
 1. The hydrophone sensing point is fragile. Avoid any physical

      contact, particularly near the sensing element. To remove
      trapped bubbles or particles at the tip, consider using a light
      jet of water from a squeeze bulb or a syringe for removal. In
      general, it is good practice to install the hydrophone as a last
      step, after completing all other setup items.
 2. It is best to use the supplied hydrophone mounts which are
      designed to minimize handling damage as well as acoustic
      reflections.
 3. When connecting the hydrophone with its accessories (e.g.,
      preamplifier, adapters, cables), it is only necessary to hand
      tighten. Over-tightening may result in damage to the
      housing.
 4. Make sure to connect the hydrophone with its preamp only
      when the power is disconnected.
 5. Connect the power supply into the DC block as the last step
      in any hydrophone connection sequence. If a connection is
      made under load, a high shorting current arises and can
      damage the preamplifier.
 6. A common failure is over-stretching the cable because it is
      too short to support the necessary setup. Inquire about
      longer hydrophone cables if needed.
 7. Limit the amount of time that the hydrophone is immersed
      in water. If the measurement session is over, it is best to
      remove the hydrophone from the water to help extend the
      hydrophone life.

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