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14 
AUDIOTEL INTERNATIONAL MN400872 Issue 1 (08/04) 
D
ETECT
IV User Manual
AUDIOTEL INTERNATIONAL MN400872 Issue 1 (08/04) 
15
Device Detectors
On the right of the screen these two detectors respond to electronic devices whether they are 
active or inactive.
 
Metal detector   will respond to inactive well screened metal targets with a reasonable cross 
sectional area (6cm x 6cm) at a range of approx. 10cm through brick and 
CELCON block.
 
NLJD  will respond to electronic targets (active / inactive) provided they are not 
well screened against the NLJD signals. The Bar graph display shows both 
2nd (
red
) and 3rd (
green
) harmonic return signals
Selecting a Detector
To select a detector, either
       Touch the relevant detector icon on the screen 
or 
       use the Left and Right controls on the keypad to highlight the relevant detector icon.
The currently selected detector is identified in the upper part of the DETECT screen and 
highlighted by a RED box around the detector icon.