Minelab E-Trac User Manual

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31
The Target Response is the sound produced
by the detector when a target is detected
and not ‘rejected’. A highly conductive target
(e.g. a large silver coin) will generally produce
a high-pitched tone and a low conductive
target (e.g. foil) will generally produce a low-
pitched tone. Large targets or targets close to
the ground surface emit louder signals (p. 57).
When a ‘rejected’ target is detected, the
Threshold ‘blanks’ (becomes silent), indicating
that a target is located underneath the coil,
but has been rejected by the Discrimination
Pattern (p. 20). Blanking is a useful way
of distinguishing between desired and
undesired targets.
Note: As the coil passes over the nail, the
Threshold ‘hum’ momentarily
disappears (blanks).
Large objects close to the coil may Overload
the detectors electronics. When this happens,
E-Trac displays an Overload message and
emits a fading Overload sound which repeats
until the coil is moved away from the source
of the overload.
A Simple Detecting Exercise Noise Cancel
‘Blanking’ (No Sound)
Threshold
Threshold
Target Response
Detector Sounds (cont)
The E-Trac may become noisy due to
electrical interference from power lines,
electrical equipment or other detectors
operating close by. The detector interprets
this interference as inconsistent, short beeps
and erratic movement of the Target Crosshair
in the Smartfind window, or erratic changing
of FE-CO numbers in the Digital display.
Noise Cancel is used to minimise interference
in the current environment. The channel can
be changed automatically by pressing the
Noise Cancel button or manually in the Noise
Cancel setting via the Expert Menu (p. 75).
Automatic Noise Cancel
The Noise Cancel button instructs the
detector to automatically listen to every
channel and select the channel with the
least interference. Automatic Noise Cancel
may take up to 30 seconds. The detector
will display the progress on the LCD display
and a tune will sound at the end of this
period. After the Noise Cancel is complete
the chosen channel will be displayed
momentarily and then the detector will
resume normal operation.
To initiate an Automatic Noise Cancel:
1 Hold the detector 30cm (12”) above the
ground and make sure there are no large
targets or obvious sources of EMI close by.
2 Press the Noise Cancel button. Keep
the detector 30cm (12”) above the
ground and completely still during the
automatic channel selection.
Note: This may take up to 30 seconds.
Overloading is not harmful to the electronics
of the detector.
It is important to understand the sounds
produced when you make a valid or invalid
button press. You will usually encounter these
sounds while adjusting settings via the Main
Menu. A valid button press makes a “bip”
sound, an invalid button press makes a
“ba-dump” sound.
30cm
(12”)

Minelab E-Trac Specifications

General

Transmission Technology	Full Band Spectrum (FBS) Multifrequency Technology
Microprocessor	32bit, 48MHz microprocessor – fast and powerful
Coil	Ultra-lightweight 11” Double D (DD) waterproof coil
Connectivity	USB connector for communication with Personal Computer
Software	Intuitive User Interface; Fast Target processing; Multi-language functionality
QuickMask™	Fast and Easy adjustment of Ferrous and Conductivity Discrimination
User Modes	4 Minelab Modes and 4 My Modes
Depth Gauge	Accurate Gauge active in Normal detecting and Pinpoint mode
Pinpoint	Non-motion with modulated audio and visual Crosshair on LCD, 2 Modes – Normal and Sizing
Discrimination	2 Dimensional Smartfind™ Discrimination
Target Identification	2 Dimensional Smartfind™ Size / Conductivity and Ferrous characteristics Conductivity 1-50, Ferrous 1-35
Sensitivity Adjustment	Fully Automatic; adjustable to be more aggressive or conservative, Manual Setting 1-30
Sensitivity Gauge	Auto Level, Manual Level, Suggested Level
Threshold	Fine adjustment level from 1-50
Recovery Speed	Selectable Fast & Deep
Trash Density	Low for areas with isolated targets or High, for areas with more trash
Noise Cancel	Automatic & Manual selection of 11 channels
Audio Response	4 Settings: Normal, Long, Smooth, Pitch Hold
Tone ID Number of Tones	1, 2, 4 and Multi-tone; customizable for Conductivity or Ferrous response
Tone ID Variability	30 adjustable steps for better Target Identification
Headphone	Input ¼” 100Ω Stereo Jack
Ground Balance Modes	Auto Ground Compensation - Advanced Digital Filtering
Ground Settings	Neutral for most ground conditions, Difficult for more mineralized soils
Batteries	1600 mAh NiMH or Alkaline batteries
Low Battery Audio Alarm	Audio and visual indication
Visual Display	Large 3.4” (8.65cm) greyscale LCD panel with Contrast adjustment and Backlight
Patents	US 4890064; US 5537041; US 5506506