Ctx 3030 Discrimination - Minelab CTX3030 Instruction Manual

Target Cursors
Accept Cursor
Reject Cursor
CTX 3030 Instruction Manual
Detect Screen

CTX 3030 Discrimination

Discrimination is the detector's ability to identify and classify signals from metallic
materials, then mask signals from undesired trash and highlight signals from
desirable targets. The CTX 3030's advanced signal processing simultaneously
analyses objects according to their conductive (CO) and ferrous (FE) properties.
The different FE-CO properties can be displayed numerically and graphically on
the Detect screen as well as being heard as distinctive audio tones based on these
properties. The CTX 3030 utilizes Minelab's unique scale of discrimination, which
numerically represents a target's ferrous and conductive properties on the same
display (Figure 8).
Figure 8 – Detect screen showing discrimination scale
The horizontal axis rates the target on its size/conductivity (CO), ranging from 1 to
50, left to right. A CO value of 1 represents low conductivity (small alloy coins, foil,
9 ct and fine jewelry) and 50 represents high conductivity (large silver coins, copper
items).
The vertical axis rates the extent of the target's ferrous characteristics (FE), ranging
from 1 to 35, top to bottom. An FE value of 1 represents low ferrous characteristics
and a value of 35 represents high ferrous characteristics.
As the coil passes over a target, the detector digitally processes the target signals.
At the end of detection the Detect screen will display a Target Cursor and a Target
ID Panel showing the target's FE and CO properties. The position of the cursor is
relative to the these properties.
The Discrimination pattern is shown on the Detect screen as white and shaded
regions of the discrimination area. White regions indicate accepted areas where
targets of interest will produce Target IDs and detector audio. Shaded regions
indicate rejected trash areas where targets will be ignored and do not produce
audio and Target IDs.
When an accepted target is detected, the Accept cursor will appear in the white
area and a target response will be heard. The Target ID Panel will be displayed at the
top of the screen.
When a rejected target is detected the Threshold will blank and the Reject cursor
will appear.
Ferrous targets (e.g. nails) contain a large amount of iron, or some magnetic material.
Because they are magnetic, ferrous targets generally display the Target cursor at the
bottom of the Detect screen.
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