Instruction manual

4
GETTING STARTED
WITH YOUR
PROMET 3
CONTROLS AND
WHAT THEY DO
On/Off Tune
Sensitivity
After assembly and ballery insertion the PROMET 3 is now ready for
operation. The PROMET 3
is extremely simple to operate, and is
programmed and designed in such a way that the operator is not required to
adjust discriminate or ground exclude levels.
All that
is required is to turn the detector ON at the ON/OFF TUNE control
and tune the detector
to threshold, as described below, and then programme
the mode of operations. Here's how:-
Tuning
Turn the detector ON at the ON/OFF TUNE control which works in conjunction
with the RETUNE bullon on the meter console. Hold the RETUNE
STATUS button down, and rotate the Tune control clockwise until the meter
reaches the central
Tune position, and the sound is just beginning to break
through. Set this carefully and precisely and then release the memory
RETUNE
STATUS push bullon. If the Tuning level alters or wanders off tune,
do not adjust the TUNE control. Simply operate the RETUNE STATUS push
bullon which will automatically re-tune the detector
to the original selected level.
Programme Set
To begin detecting, first tune, then set the controls as follows:
Sensitivity - 0
Ground Exclude -
G2 or Beach
Auto
Tune - ON
Audio Discrim. - ON
Meter Discrim. -
ON
Even greater depth will be achieved by leaving the Audio Discriminate off as this
control tends
to draw extra current when a good object is located, as
explained on page 2.
The RETUNE STATUS bullon will indicate which modes are engaged and
operational. The AUTO TUNE button can
be turned off once the machine has
been operated for
30 minutes (except on the beach).
The detector is now excluding the ground
at a pre-set level on one channel
and discriminating
at a programmed level on the other channel.
All metal objects will
be indicated by an increase in loudness but rejected
objects will cause the meter
to fall to the left and the tone frequency to
decrease. Accepted targets will conversely cause the meter to rise to the right
or remain stationary and the tone frequency
to increase.
Simply sweep the detector
in an arc, ensuring the head is level and as close
to the ground as possible. Advance half a head length at a time, and ensure
the tuning level is correctly
set by raising the head an inch or two, depressing
the RETUNE
STATUS push bUllon, and then lower the head and continue.
For a more detailed description of the CONTROLS AND WHAT THEY DO,
read on, but if you follow the programmed method, outlined above, you
cannot go far wrong.
The controls are divided into two areas. Those on the Main Control
Box of
which there are three controls and those
on the Meter Console where there
are five function switches (four with associated lights) located below the
meter.
Meter Console Functions AUTO TUNE, METER DISCRIMINATE and AUDIO
DISCRIMINATE are pressed
to engage function, press again to disengage.
RETUNE
STATUS and BATIERY CHECK are momentary switches. Hold
down
to engage function, release to disengage.
See
Tuning above.
The SENSITIVITY CONTROL regulates the sensitivity of the detector
to drift,
instability etc., as well
as to metal objects. The recommended starting point is
oand highlighted in red.
Increasing the Sensitivity
by tuning this control into the + sector the detector
will be more prone
to drift, erratic signals, ground interfaces, etc. Where there
is no ground effect or outside interference the SENSITIVITY control can
be
operated at higher levels.
But when the signal becomes unsteady or erratic, the Sensitivity level should
be
reduced to obtain a clear, steady tuning threshold. Only when the tuning is constant
and steady will the detector operate
at the best optimum depth penetration.