AQUASCAN INTERNATIONAL DX-300 Manual de Instruções - Página 8

Procurar online ou descarregar pdf Manual de Instruções para Instrumentos de medição AQUASCAN INTERNATIONAL DX-300. AQUASCAN INTERNATIONAL DX-300 19 páginas. Diver held magnetometer

Imprimir página

DX-300 – DIVER HELD MAGNETOMETER

8. As you get closer and closer to the target, the DX-300 will begin to have constant

audio output pitch, so you will need to lower the sensitivity to be able to actually

pinpoint the target. Do this by changing the SENSITIVITY setting to HI, MED,

then; as you get even closer, change the setting to LO.

9. If possible, experiment with several different targets of different sizes to get an

idea of how the unit behaves under different circumstances. If you have access to

a buried target such as a Steel Pipe or Armoured Cable then carry out a series of

tests with the sensor held vertical. Having performed the above checks on land,

you are now ready to use the Aquascan DX-300 in the water.

Underwater Operation

NOTE:

As explained above in the Land Test, you must be free of objects

containing ferrous materials. Steel dive tanks are generally out of the question.

Most Stainless Steel has little or no magnetic properties, so it usually won't

interfere with the operation of the DX-300.

something as small as a set of keys can affect the operation of the unit and give you

false readings. Also, don't try to operate the unit in the vicinity of a large steel

vessel.

The control unit of the DX-300 can be worn or carried in a number of ways; the

choice will be influenced by the conditions and diver preference. The most

obvious choice is worn clipped to any suitable location on the diver with the D-

Ring mounting system provided with the unit. Other options include the quick

release belt harness; strapping it to the upper arm, or mounting it to the DX-300

Armsaver optional accessory - supplied with the Professional systems (see

section DX-300 Optional Accessories).

The Bonephone should be placed under the hood. If no hood is worn, it can be

placed under the strap of the facemask or under a suitable neoprene headband.

Position the Bonephone so that it is on a bony part of the head close to the ear.

N.B. NEVER PLACE THE PHONE DIRECTLY OVER THE EAR AS THIS

COULD

INTERFERE

EARDRUM.

3. Dive to the seabed area to be searched.

4. Switch the unit on and rotate the SENSITIVITY control to HI. Hold the Sensor

Probe at full arm's length in front of you and pointing vertically down. Rotate

the SET AUDIO control to achieve the audio threshold point. Using the Basic Kit

keep the Sensor Probe at arms length and vertical, or in the case of the

Professional Kit utilising the 45° or 90° optional assemblies - according to the

swim height off the bottom.

If you are trying to pinpoint a "response" from a towed magnetometer, the

optional procedures are to operate a circular search using a distance line from a

central marker. Alternatively, using the reference point as the "hub of a wheel"

WITH

PRESSURE

User Manual

But check yourself carefully;

EQUALISATION

THE