NOTE: If you wish to use the detector with the factory presets, pull the trigger after the main
ground balance screen is displayed. This is very useful if you want to find a clean place quickly,
so that you can perform the ground balance process correctly using the „pumping” technique.
Correct ground balance is gained by „pumping”. The search coil should be slowly moved
up and down above the ground, each cycle taking about a second. The detector will display the
number of cycles remaining – decreasing from 5 to 1 and after the last movement up the
message « Detector ready, pull trigger » will be shown. After pulling the trigger, information
about the ground will be displayed on the screen, at the same time an audio signal will indicate
the probability of incorrect ground balance – for example due to metallic objects in the ground.
Signal
phase from
the ground
Message Description
-90 to -86 « OK », along with three
sounds of progressively
higher pitch
Correct ground balance
-86 to -83 « ? » and two sounds of
progressively lower tone
A possibility that ground balance has been
completed over a metal object or the ground has
other conductive properties (eg wet meadow) – the
user should, if in doubt, perform ground balance
elsewhere or use the factory preset to check with
the Pinpoint if there are any metal objects in the
ground.
-83 to -80 « ! » and one low beep An increasing probability of metal objects in the
ground or increasingly higher conductivity of the
ground because of the presence of water in it. We
strongly recommend checking that there are no
metal objects in the ground (on the factory preset)
and repeating ground balance.
-80 to -75 « !! » and two low beeps
-75 to -65 « !!! » and three low beeps
Above -65 « !!!! » and four low beeps
NOTE: On high conductivity soils, the detector may be unstable at the highest Sensitivity
settings. This is a not uncommon and it may be necessary to reduce the sensitivity of the
detector or work using the factory preset.
A single ground balance process does not guarantee stable operation across an entire
search area or for the whole of a day's searching. It is best to repeat a ground balance process
each time a new area is started or when the detector starts to give false readings. Examples of
new areas would be where field changes to forest, or when moving from a track to wetlands.
The detector will also require a ground balance check when either the program, the
Frequency or the Hot rock parameters are changed.
NOTE: While data is being prepared for work (« Preparing Data » screen) the search coil must
be raised a minimum of 0.5 m above the ground and away from metal objects. Ground balance
must be done at least 15 m away from other detectors. Not following these guidelines will not
damage the detector, but it will cause the detector to operate less accurately – a proper ground
balance procedure will fix this quickly.
RUTUS Alter71 ver. 2.0 5
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