9. Control, adjustment and indication appliances
The control, adjustment and indication appliances lie on the front panel, back panel and
bottom of the electronic block (Fig.3).
Description of the various appliances:
9.1. VOLUME potentiometer
The VOLUME potentiometer serves as the on/off the metal detector (level
"OFF POWER") and to regulate the audio volume (levels from "1" to "MAX").
The chosen position from the potentiometer scale (usually between levels
"3" and "6") should correspond to pleasant sounds made by the metal
detector, ie that are neither loud, nor quiet.
9.2. GROUND switch
The GROUND switch serves for switching between the two working modes of
the metal detector:
MANUAL: Manual ground balance
AUTO: Automatic ground balance
Those two working modes relate to the chosen technology for eliminating the ground (terrain)
interference on the metal detector’s work. This interference usually causes instability of the
device and false signal registration (during the course of the search while the search coil is
moving, the device is making sounds without necessarily detecting a real metal object).
When in a manual ground balance working mode (GROUND switch turned to the "MANUAL"
position), the ground interference is eliminated by manual adjustment of the metal detector by
the user, by following the procedure given in the description of the GROUND potentiometer
below. This working mode is appropriate for terrains with homogeneous soil, where the metal
detector would reach its full potential by a fine manual adjustment.
When in an automatic ground balance working mode (GROUND switch turned to the "AUTO"
position), the metal detector’s electronics automatically eliminates the ground interference and
there is no further need for manual balance adjusting by the GROUND potentiometer from the
user and no further relation with the chosen GROUND potentiometer level. This working mode
is appropriate for terrains with a heterogeneous soil. In order to optimize and achieve the best
possible balance, the automatic ground balance working mode is divided into 3 ground zones
with a small area of correlation. They are selected by a switch AUTO ZONES as described
below.
9.3. AUTO ZONES switch
The AUTO ZONES switch serves to set one of three available automatic
ground zones of work in automatic ground balance working mode.
The individual zones are numbered as zones "1", "2" and "3". This
numbering corresponds to: soils with black and/or negative mineralization
(„1“); not mineralized or weakly mineralized soils („2“); soils with a color
and/or positive mineralization („3“).
BLISSTOOL LTC48X -
User Guide (version EN201008241400)
Page 11 of 28