Minelab E-Trac User Manual

58
59
4 Press either the Left or Right Navigation
Button to change the Threshold Level
5 Press the ‘Detect’ button to exit the Menu
and resume detecting
Audio Menu
Adjusting Threshold Level:
1 Press the ‘Menu’ button
2 Scroll across to ‘Audio’ (using the Right or
Left Navigation Button)
3 Scroll down to ‘Threshold Level’ (using the
Down Navigation Button)
If the Threshold Level is too low, the slight
variation caused by a small or deep target
may not be sufficient to hear. Adjusting the
level to below an audible level will ensure
silent operation but could mask the audio
response from small targets.
Too High
Audio range
that you are able
to hear.
Small signal
masked
Loud signal
just audible
Threshold Level
Threshold Level
Range: 1–50
Factory Preset: 30
The constant background ‘hum’ produced by
the detector is called the Threshold. Variations
in the Threshold help you to hear very small
and deep targets. When a rejected target
is detected, the Threshold sound ‘blanks’
(becomes silent) indicating that an undesired
target is underneath the coil.
The Threshold is controlled by Threshold
Level and Threshold Pitch (p. 69). The
correct setting of both Threshold settings will
depend on your hearing and environmental
noise such as wind, waves and machinery.
The Factory Preset for Threshold Level is set
at an appropriate level for E-Trac’s built-in
speaker. If the Threshold is too loud whilst
using headphones, use the Threshold Level
setting to reduce the volume.
Too Low
Small signal
now inaudible
Loud signal
Audio range
that you are able
to hear.
Threshold Level
Just Right
Small signal Very loud
signal
Audio range
that you are able
to hear.
Threshold Level
If the Threshold Level is too high, accepted
targets will be harder to hear above the
Threshold ‘hum’. Small target responses will
become difficult to hear as the Threshold
nears a maximum setting of 50 when there
will be a persistently loud Threshold ‘hum’.
Adjust the Threshold Level to a faint, audible
hum. This will highlight variations in signal
response which may indicate the presence
of a target. If the soil conditions change the
Threshold Level may need adjustment.

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