batteries
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page 10
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3 batteries
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GP 3500
page 10
Mains battery charger
The mains battery charger will charge the battery from local mains (AC) power outlets.
Step 1.
Connect the mains charger to a mains outlet.
Step 2.
Connect charger to the battery using the power cable.
Step 3.
Switch the mains outlet on.
The charger will recharge a completely flat battery in approximately 24 hours. Partially
discharged batteries will require a shorter period to recharge. Allow approximately 1.5 to
2 hours charging for each hour the battery was in use. The flashing rate of the charger
LED will decrease as the battery gains charge.
Vehicle battery charger
The vehicle battery charger will charge the battery from the cigarette lighter socket of most
motor vehicles.
Step 1.
Connect the charger to the cigarette lighter socket and turn the ignition switch
to Accessories.
Step 2.
Connect the detector battery to the charger using the power cable.
This supplies 12V power to the cigarette lighter socket. This voltage is converted by
the charger to charge the detector battery. A red LED indicator will flash while the
battery is charging. When the battery is flat the LED may flash fast enough so as to
appear constantly on. As the battery gains charge, the LED will flash at a slower rate.
Step 3.
Leave the battery to charge for approx. 10 hours using this charger.
If the battery voltage of your vehicle drops below 11V, the charger will stop operating.
Therefore the battery charger should not flatten the vehicle battery. Check that your
vehicle battery is in good condition before camping in remote areas and run your
engine above idle speed for at least 30 minutes each day to keep your vehicle battery
charged.
CAUTION –
The Vehicle Battery Charger is designed for use with vehicles, which
have a negative earth electrical system. Most cars manufactured after 1970 should have
negative earth electrical system. Connecting the charger to a vehicle with a positive earth
system will cause the fuse in the cigarette lighter plug to blow and the LED indicator will
not light. If you need to replace the fuse located in the cigarette lighter plug, you will need
to use a 3ag/10amp fuse.
detector sounds
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4 controls and operation
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page 11
GP 3500
GP 3500
www.minelab.com
page 11
easy reference
DETECTOR SOUNDS - Explanations
In the course of operating your detector, there will be various noises and sounds that you may
hear. Here is an explanation of some of these sounds.
Threshold and Tone
This is the background sound produced by the detector. The level is set using the Threshold
control. The tone of the threshold is set using the Tone control.
Target Signal
This is the abrupt change of the tone and volume of the threshold sound when a target is
detected.
• The maximum level is set by the Volume control.
• The amount of tone variation is set by the Signal control.
• If the tone falls first and then rises, as the coil is passed over a target, this generally
indicates a large target.
• If the tone rises first and then falls, as the coil is passed over a target, this generally
indicates a small target.
Ground Noise
Irregular noises that are difficult or impossible to pinpoint when moving the coil over the
ground. Ground noise is caused by the changing chemistry or 'mineralization' of the ground.
Maintaining an accurate ground balance will greatly reduce this effect.
Tune Indication
An initial beep sounds, then while the detector is testing the range of bands for the most
stable, the threshold may become more quiet or chattery. Once selection is complete, three
sharp ‘beeps’ are given.
Low Battery Indication
If the battery level drops below the desired power to give adequate function,
a series of alarm signal pulses are given at half second intervals.
