Battery Test; Practicing Outside - First Texas Products VLF 2.1 User Manual

Battery Test

Click the right knob fully counterclockwise (all the way to the left), in order to test
the batteries.
If the batteries are good, the needle will move to the right and enter the green
zone on the indicator label.
If the needle does not enter the green zone, replace the batteries.

Practicing Outside

1. Turn the detector on
a. Rotate left knob clockwise to a high sensitivity setting.
b. Click right knob on to exit the "battery test" mode.
c. Maintain right knob in counterclockwise position, but do
not click into the "battery test" mode.
2. Find a clear area in the grass
Sweep the searchcoil around the grass to find an area where the
detector does not beep. In order to test your detector, you must
first find an area free of metal objects.
3. Toss these metal objects on the ground
a. A nail or other iron object like a small screwdriver
b. A zinc penny (dated after 1982)
c. A quarter
4. Keep the objects spaced apart on the ground
5. Sweep the searchcoil over each of the objects
a. You must keep the searchcoil moving.
b. Notice that the sound is loudest when the metal object is
under the center of the searchcoil.
c. While sweeping back and forth, slowly raise the searchcoil
several inches off the ground.
Notice that the sound is louder when the searchcoil is closer
to the objects.
6. Turn the right knob progressively to the right while passing the
searchcoil over each of the objects
The nail (or small iron object) is eliminated from detection
with the right knob in approximately the 3:00 position.
The zinc penny (pre-1982) is eliminated from detection with
the right knob in approximately the 6:00 position.
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