Aquarian Audio Products UPA-1 Manual do utilizador - Página 3

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Care and Maintenance:

No special care is required for the UPA-1. It is designed to withstand corrosion and the impact of

accidental drops. But making an attempt to keep the output jack clean and dry and avoiding unnecessarily

rough handling will help to ensure the long-term stability of this product. Consider the following to protect your

investment in this device:

Review all of the notes and cautions elsewhere in this manual.

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It is best not to store this product in a waterproof enclosure. Doing so will trap moisture, salts and

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minerals that are left on the hydrophone and amplifier surfaces after deployment and increase

corrosion problems with the output plug.

The UPA-1 is designed to be highly weatherproof, but water can seep under the cover if flooded

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repeatedly or for an extended time. If using this product in heavy rain or where subject to splash, it is

best to hang it from a lanyard or mount it vertically so that water drains away from connections. If the

hydrophone is flooded, remove the front panel assembly from the cover and inspect for moisture.

Allow small amounts of moisture to evaporate with the system left open.

Avoid storing the UPA-1 in very hot environments such as that of an unventilated vehicle in a hot,

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sunny location.

Output Jack Replacement:

The UPA-1 is expected to be used within corrosive environments. Sea salts and chlorine will corrode

electrical connections. This is why we suggest that you leave your hydrophone connected to the UPA-1 so

that connector remains sealed. The output jack is a high-quality connector that is gold-plated for maximum

corrosion resistance. It will however need replacement over time if used in a corrosive environment. Output

jack corrosion is not covered under warranty. We have addressed this issue by making this jack easily user-

replaceable.

To replace the output jack, use a small phillips or flat-bladed screwdriver to disconnect the wires from

the output terminal. Note the position of these wires before removal. With these wires disconnected, pull the

amplifier board away from the rubber front panel and set it aside. The output jack will now push out of the

front panel with firm pressure. This is most easily done by pushing from the front (opposite the wires). Don't

attempt to pull on the wires as this may break them. Use any convenient tool to push the jack out (e.g. a

pen, the plug from your headphones or patch cable, etc...). Push the replacement jack into the front panel

and reconnect wires in the same way that you removed the old. The standard wiring configuration is

(reference figure 2) red and white to position "A" and black to position "B"

Headphones / Speakers:

When monitoring sounds directly from the UPA-1, please do not underestimate the importance of

good quality headphones. The difference between the free headset that you got from your last airplane ride

and a good-quality set can be remarkable—not only with respect to the quality of sound, but also the

amplitude, or relative "loudness". You will not damage the UPA-1 by using any convenient headset, but for

best results, look for stereo headphones with an impedance of 60 ohms or more with a sensitivity of

approximately 100dB SPL/1mW or better.

The UPA-1 does not have the power to directly drive loudspeakers. Many amplified speakers are

available for use with personal media players. Any speaker that takes batteries or a power supply of its own

can be used. Please note that, if using a single mono speaker, you may need to change the output plug

wiring. See notes above.

Securing your UPA-1 and Hydrophone:

The UPA-1 is shipped with a short lanyard and a safety line for securing the hydrophone or mic.

Please reference the photographs on the following page. Figure 3 shows a 2-loop prussic knot which, when

pulled tight, will grip the cable of your hydrophone. This is a very quick and simple knot to tie with any short

loop of cord. If it is not obvious how to tie this knot from this illustration, it is easy to find very good animated

and sectional tutorials by searching "prussic knot" on the Internet. After tying the line around the hydrophone

cable, place the lanyard through the safety loop, then though the center hole in the cover, and loop the

lanyard hook back through the lanyard and pull tight. When finished, you should have a small amount of

slack in the hydrophone cable between the prussic knot and the plug so that the safety line is carrying the

weight of the hydrophone. The lanyard can then be clipped to a lifejacket or other structure to securely hold

the system.