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AQ1B Underwater Metal Detector User Manual
5.
A fully charged new battery pack should read approximately 9.8 volts. This
might decrease slightly as the pack gets older. As the detector is used, the
voltage will drop gradually, but performance is not affected until the voltage
drops below 8.4 volts. Once the voltage drops below 8.4 volts, it will drop at
an accelerated rate. The detector will not function correctly if it gets down
around 7 volts or lower. If you measure the voltage and it is near or below 8.4
volts, it's time to re-charge the battery pack.
Checking Battery Pack Performance
Note: For routine maintenance this should be carried out every three months.
The recommended procedure is as follows: -
1.0
Connect an AQ1B Loop or Probe to your AQ1B module.
1.1
Power on your AQ1B and leave it on overnight to fully discharge the battery.
1.2
Disconnect the loop and power the AQ1B off.
1.3
Charge the AQ1B for at least 14 hours using the provided AQ1B charger.
1.4
Once the AQ1B is fully charged, disconnect the charger.
1.5
Connect an AQ1B sensing loop and Bonephone/Headphone to the unit and
switch it on. Place the loop away from any metal and adjust the SET AUDIO
control to get a steady slow clicking sound.
1.6
Make a note of the detection range on a suitable test object.
Battery Test Points
10