Gold metal detector - GPX4500

Gold detecting is a fascinating and rewarding activity enjoyed by people all over the world. By getting to know your GPX-4500 you can become one of the many who find gold and valuable treasure.
The GPX-4500 is Minelab's most advanced gold detector. It is a high precision instrument incorporating Multi-Period Sensing (MPS), Dual Voltage Technology (DVT), Smart Electronic Timing Alignment (SETA), and the latest in high-tech analogue components combined with advanced digital processing.
The GPX-4500 will locate gold in all types of ground, especially highly mineralised ground conditions, with greater efficiency than any previous detector.
This manual is designed to help both the beginner and expert prospector get the best performance out of the GPX-4500.
Minelab wishes you every success in your quest for gold and treasure!

The GPX-4500 utilises Minelab’s proven 'Dual Voltage Technology' (DVT). This ensures an accurate Ground Balance to provide maximum sensitivity and depth in all ground types.
The GPX-4500 offers a total of six Timing options, each incorporating the all-new SETA technology. Smart Electronic Timing Alignment (SETA) ensures the detector is precisely aligned for each individual Timing option. This improvement in calibration reduces the susceptibility to certain types of interference, and significantly improves
the detector’s immunity to highly magnetic
rocks and soils.
Through a process of dynamic noise compensation, SETA ensures that the threshold stability is improved and maintained, allowing you to operate the GPX-4500 with maximum efficiency under all conditions.
The GPX-4500 now offers six preprogrammed
Search Modes, set up for the most common
search techniques.
All modes can be fine tuned by simply scrolling through the various functions of the detector and adjusting the settings.
With improved fuctionality and new timings the GPX-4500 is capable of finding nuggets in a diverse range of ground conditions with greater ease than previous detectors.

Rx Gain
The Rx Gain function sets the overall sensitivity level of your detector. In areas where soil conditions are mild you can increase the Rx Gain. In areas that are more difficult Rx Gain can
be reduced.
Timings
The GPX-4500 features a number of new timings, increasing performance in different conditions.
Ground Balance (GB) Type
Ground Balance Type now has three settings: Normal, Specific, and GB Off. Normal is the preferred setting for most soil types. Specific Ground Balance is designed to be used in very hot ground, and is especially useful with Monoloop coils. GB Off switches the ground balance circuit off for maximum depth in very mild soils, sand etc.
Response
The Response function allows you to invert the target response. Deep targets can now sound like the more familiar 'rising and falling' pitch of a shallow target signal.

Motion
The speed at which you sweep the coil has an effect on target response time and Ground Balance adjustment. Matching your preferred coil sweep speed with the corresponding Motion setting can reduce noise and improve your ability to pick up targets at depth.
Custom Search Mode
With Custom selected, a range of new custom search mode positions become available from the LCD menu. A new mode name picker is also included. Create your own modes for different locations and use them for future visits.
Stabilizer
This is a new feature which allows you to fine tune your audio, to obtain the best compromise between smooth operation and clear target signals.
Target Volume
Used to control the built-in amplifier which affects the volume of target signals. It is active with both headphones and an external speaker. Target Volume can also be used to reduce the severity of ground signals.

Battery LED Patterns
Brief cycling red-orange-green:
Occurs when the charger is turned on or when a new battery is connected
Solid orange:
First phase of charge
Orange with green blink:
Last phase of charge
Solid green:
Battery is charged
Slow red blinking:
Continuous orange blinking:
The first phase of charging has timed out. If this continues to occur each time the battery is charged the battery is no longer functioning correctly. Contact your dealer.
Solid red:
There is a fault with the battery.
Disconnect and reconnect the battery.
If the LED is still red contact your dealer.

The Lithium Ion battery is specifically designed
for the GPX-4500.
The Lithium Ion battery is not compatible with
non GPX detectors. The GPX-4500 is supplied with a
power lead which has been specifically designed to fit
GPX detectors only. Attempting to use the Lithium Ion battery
pack with other detectors may damage the detector or the battery pack.
Do not try to adapt this battery to other models as it will very likely
cause damage.
• Do not charge the battery at temperatures above 45°C (113°F).
• Do not charge the battery at temperatures below 0°C (32°F).
• Do not leave the battery in hot conditions (e.g. on the dashboard
of your car or rear parcel shelf).
• Do not immerse the battery in any liquid or allow water ingress.
• Do not throw the battery or impact it in any way.
• Do not short-circuit the battery.
• Do not use the battery if it is damaged or deformed.
• Do not disassemble or reconstruct the battery.
• Do not incinerate the battery.
In the event of a fault, you should return the battery to a Minelab
authorised service centre for repair.
The use of non-approved components will VOID YOUR WARRANTY.
There are no user serviceable parts within this battery pack.