Minelab Eureka Gold Manuel de service télécharger pdf (Page 17)

Page 30 The Minelab Eureka Gold

Figure 20 – Automatic Ground Balancing

Page 31 The Minelab Eureka Gold

A unique feature of the discriminator is its ability to read the degree of

ground interference during discrimination. The detector automatically

adjusts its discriminating power depending on the type of ground present,

thereby achieving the maximum reliable discrimination depth.

Therefore in ‘mild’ ground the detector will discriminate accurately at greater

depth, while in ‘hot’ ground, the discrimination depth is reduced to

maintain reliable discrimination. At all times, however, the depth and

sensitivity that the Eureka Gold picks up targets is not reduced.

Be aware that if the detector coil is held in the air or stationary over ground

for an extended period, the discrimination sensitivity increases to maximum.

If it is then used on ‘hot’ ground, false discrimination signals will appear.

It is important to keep the coil swinging in a smooth motion at all times.

After a short time, however, the detector will adjust to its new condition and

the sensitivity of discrimination will automatically be set correctly.

To obtain the best performance out of your discriminator we suggest you

take advantage of the multiple frequency features of the Eureka Gold. The

best frequency for discrimination is 6.4kHz, followed by 20kHz and then

60kHz. It is best to:

• Search for gold at 20kHz or 60kHz in Fast Track or Slow Track mode.

• Check the ferrous nature of a located target in Fixed mode at 6.4kHz.

10. Discrimination

10.1 Discrimination of Iron Targets

When the Discriminate switch is set in the Discriminate position, the Eureka

Gold is able to discriminate between ferrous (iron) and

non-ferrous targets (valuables).

10.2 Discriminating in ‘Hot’ Ground

If detecting in Fast Track or Slow Track and the detector is in

Discriminate mode, there are several techniques that must be followed for

accurate discrimination. As mentioned earlier, the Eureka Gold

incorporates a unique feature that adjusts the sensitivity of the

discrimination, depending on the ground conditions.

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Minelab Eureka Gold Manuel de service Page 17