Minelab Eureka Gold Manuel de service télécharger pdf (Page 11)

Page 18 The Minelab Eureka Gold

5.7.1 Discriminate Control

The Discriminate control sets the sensitivity to ferrous objects. At the

minimum setting small ferrous objects at shallow depths are less likely to

be discriminated, while at the maximum setting these objects are more

likely to be discriminated. Large ferrous objects should always be

discriminated unless they are too deep.

5.8 Tone

The Eureka Gold has a tone control which allows the

operator to adjust the “tone” or “pitch” of the audio threshold

signal to suit the individual. Generally, this should be set to

the pitch that you find the easiest to listen to.

We would recommend that you experiment by testing on various targets

buried at different depths to find the tone that best suits your hearing.

5.9 Headphones

The headphone socket is located at the bottom right

corner of the front panel. Headphones used should be

of low impedance, but no less than 8 ohms. The socket

will accept most mono and stereo headphones with a

¼" jack.

When the headphone plug is inserted, the loudspeaker is automatically

disconnected so that sound only comes through the headphones.

When using headphones, you can adjust the Threshold control to a lower

threshold level, and outside noises, such as wind, will be less distracting.

Using headphones also conserves battery life. If the headphones have a

“Stereo/Mono” switch, set it to “Stereo”.

Headphones can significantly increase your chances of hearing a small

signal, therefore we recommend their use.

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Page 19 The Minelab Eureka Gold

5.10 Coils

The Eureka Gold should only be used with coils that have been indicated

by Minelab Electronics as being suitable for use with this model.

The 10” (25 cm) coil supplied with the Eureka Gold is a Double ‘D’ coil, that

is, it contains two ‘D’ shaped windings which are partially overlapping. This

Double ‘D’ configuration is ideal for locating deep targets in variable

mineralised ground.

The Double ‘D’ detection pattern is “blade like” and is most sensitive from

its tip to its heal. This makes pinpointing targets easy, and allows more

ground to be searched with each sweep, as each sweep has to be

overlapped less.

In addition to the 10” (25cm) Elliptical Coil supplied with the Eureka Gold,

there are two other accessory coils available, the 11” Round and 15” Spider

Coils. Both coils will increase the depth of the Eureka Gold on larger

nuggets.

Lines indicate

areas of maximum

sensitivity

Double "D"

Profile of sensitivity

along Double coil

at various depths

"D"

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Figure 16 - Coil Search Pattern

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 23 24

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Minelab Eureka Gold Manuel de service Page 11

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