Zero Setting; Alarm Thresholds Setting - silicomp METALLA PRO Manuel D'instructions

METALLA PRO
ENGLISH
OPERATING INSTRUCTIONS Chap. 3

3.7.3 ZERO SETTING

The zero setting function is fundamental to optimise detection by METALLA PRO. This is a
necessary procedure since environmental conditions (presence of metal, electromagnetic
noises, etc.) vary even at short distances so that constant detection is impossible.
Thanks to zero setting, METALLA PRO can measure the background noise (unwanted
presence of metal or electric field), memorise it and take it as the zero reference for the
following measurements.
Once the zero setting has been performed, METALLA PRO shows the difference between the
value measured and the value of the background noise and therefore only the metal or electric
field actually present.
Perform the zero setting as follows:
1. When you are in the place to be examined, stay in an area which is far from metals of
electric fields.
2. Press the RESET key.
METALLA PRO shows the graduated bar of the Electric Cable Detection function increasing till
the higher segment and then decreasing till the shorter one once the zero setting is performed.
Said operation is automatically repeated for the Metal Detection function too.
From this moment the instrument is ready for the desired detection.
If a bar does not go back to the minimum point but starts flashing, it means that the instrument
is not able to perform the zero setting due to a strong disturbance.
In this case be sure that there are neither metal nor electric fields near you, and being this the
case withdraw from that point and repeat the zero setting.
Repeat the zero setting every time you change environment or conditions of measurement.
It is to be remembered that the repetition of the zero setting does not affect at all any previous
measurement and allows more accurate measurement.
3.7.4 ALARM THRESHOLD SETTING
Alarm thresholds are reference values that METALLA PRO uses to acoustically signal that the
values measured go beyond said thresholds. Threshold values are obviously helpful when it is
not possible or easy to look at the information shown on the display.
An acoustic signal informs that one set threshold has been surpassed (both thresholds can be
surpassed too) and therefore of the presence of metal and/or an electric field. METALLA PRO
provides this information also in a graphic form by turning on the acoustic indicator related to
the function that has surpassed the set threshold.
In order to perform the setting of the alarm thresholds press the keys "+" or "-".
The Display automatically passes to the function that regulates the threshold for Electric Cable
Detection and one of its segments shows the level of the threshold that has been set.
By acting on the two keys "+" and "-" it is possible to increase or decrease said value.
Once the desired value for the threshold is set, wait two seconds: METALLA PRO passes to the
function that regulates the threshold for Metal Detection and the operator can execute the same
kind of regulation for this function.
After the new level of threshold is set, wait two more seconds and METALLA PRO will go back
to the measurement mode based on the newly set threshold levels.
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