Minelab GPX-4000 Wartungshandbuch Seite 19
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Tuning should be done
initially with the Coil
switch in Double-D
or in Monoloop (M). If
the interference is still
severe after completing
the tuning operation,
change the Coil switch to
Cancel and only re-tune
the detector again if
necessary.
Tune
Reducing Electrical Interference
To Perform an Automatic Tune:
1 Hold the detector at waist height and the coil
vertical and slowly rotate through a half-circle,
making sure there are no large targets or obvious
electrical interference sources close by. Listen for
any increase in interference as you move.
Note: If you have difficulty holding the detector very
still for 60 seconds, you can place the detector on the
ground with the coil vertical.
2 Press the Auto Tune button. Keep the detector
completely still during the automatic channel
selection.
A single beep indicates the beginning of the Auto
Tune. The detector will begin to scan each channel
for the least interference. This may take up to 60
seconds.
The detector will then select the quietest
operating channel that was identified. The end
of the Tuning process will be indicated by three
sharp ‘beeps’.
When tuning the detector in close proximity to other
detectors, each operator needs to take turns tuning.
Do not try to tune two detectors at the same time.
The detector may become noisy due to electrical
interference from powerlines, radio transmitters
electrical equipment or other detectors operating
close by. The detector interprets this interference by
the Threshold becoming erratic.
So that the detector experiences the least
interference for the current environment, the search
channel can be changed automatically by the Auto
Tune button on the control panel, or manually in the
Manual Tune setting via the menu. (pg. 63)
Auto Tune instructs the detector to automatically
listen to every channel and select the quietest
channel. Automatic tuning may take up to 60
seconds.
The Manual Tune setting, via the main menu, allows
you to manually select and listen to every channel
for the least interference.
The best channel to select will be the one where the
audio response to electromagnetic disturbances
(e.g. powerlines) is the most reduced.
It is best to select a channel with the coil away from
the ground and as still as possible. This gives the
detector the best chance of hearing all surrounding
interference (not from the ground or targets) and
selecting the quietest channel.
Interference in some locations can change during the
course of the day so you may need to re-tune from time
to time to maintain a smooth Threshold as you move
around the area.
Note: There is only one Tune setting. Any changes
made manually will override the Auto selection.
Auto Tune
Auto Tune
If you would like to know
what channel has been
chosen after an automatic
Tune, access the Manual
Tune screen and check the
channel displayed.
If Auto Tune is not working
well in Slow or Very Slow
Motion, try selecting Medium
setting. Perform another
Auto Tune and then return to
the original setting.
500mm (20")
- Quick Start 1
- WWW.MINELAB.COM 2
- Congratulations on 3
- Purchasing the Minelab 3
- GPX-4000 3
- 2 3Contents 4
- 4 5Introducing 5
- New Functions 5
- List of Parts 6
- Assembly 7
- 10 11Assembly 8
- 14 15Assembly 10
- Adjusting the Detector 11
- Charging the Battery 12
- Battery LED Patterns 13
- Taking Care 13
- 22 23Detector Sounds 14
- Detecting Basics 14
- Function 15
- 26 27Turning the Detector On 16
- LCD Menu Structure 16
- 28 29Search Mode 17
- Factory Presets 18
- Auto Tune 19
- Threshold 20
- Adjusting the Background 20
- Audio Level 20
- Soil/Timings 21
- Optimising the Detector 21
- Ground Balance 22
- Reducing Ground Noise 22
- Ground Balance Procedure 23
- 100mm (4") 24
- Changing the Sensitivity and 25
- Functions Settings 26
- Accessing Functions 27
- Accessing Settings 27
- Volume Limit 28
- Setting the Maximum 28
- Volume of all Sounds 28
- 55Tracking Speed 30
- Sensitive 30
- 56 57Ground Balance Type 31
- Iron Reject Off (All Metal) 32
- Accepting all Targets Types 32
- Iron Reject 33
- Rejecting Iron Targets 33
- Manual Tune 34
- Battery Test 34
- Viewing the Battery Voltage 34
- 66 67Motion 36
- Adjusting Sweep Speed 36
- 68 69Response 37
- Inverting the Pitch 37
- 70 71Pinpointing 38
- Locating the Target 38
- 72 73Recovering the Target 39
- Detecting Tips 40
- Commander Coils 41
- 78 79Choosing the Right 42
- Coil for the Job 42
- 80 81Troubleshooting 43
- User Preferences 43
- Glossary of Terms 44
- (Continued) 45
- 86 87Warranty 46
- Technical Specifications 46
- Service Repair Form 47
- Description of Fault 47
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