Garrett Metallsuchgerät AT Pro International Metal Detector 99630 AT Pro International 99630 Data Sheet

Product codes
99630
Page of 53
AT Pro International™  29
iron object like a bottle cap or steel washer will produce a very 
distinctive Low-High-Low response.
  Tip for using Iron Audio: In areas with high concentrations 
of iron, it is recommended to switch off Iron Audio. Otherwise, 
it may produce far too many signals. Then, if a target is 
detected that has a questionable or inconsistent response, 
switch on Iron Audio to check if it is iron.
  To fully appreciate the additional information offered by 
the Iron Audio feature, conduct the following experiment. 
Start with the AT Pro in Standard (STD) Zero Mode and pass 
the searchcoil over a bottle cap which is lying flat on the 
ground. Note that the target response is consistent with the 
audio of a good target. 
  Then, switch the detector into PRO Zero Mode and pass 
the searchcoil over the bottle cap again. Note the subtle 
low tones at the beginning and end of the target response, 
indicating a questionable target that might be made of 
iron. Finally, set IRON DISC to 35, switch on Iron Audio 
and pass the coil completely over this target again. The 
distinctive Low-High-Low response now indicates a target that 
is unmistakably iron.