Handleiding:
http://www.tesoro.com/info/manuals/current/tejon/Bij het afstellen van de grondbalans hoor je altijd een toon namelijk de treshold toon of basistoon.
Die toon moet er zijn anders kan je de grondbalans niet afstellen!
Verhoging of verlaging van deze toon bij het naderen van de grond betekend dat de grondbalans niet goed staat. De toon moet dus hetzelfde blijven dan staat ie goed.
Stukje uit de handleiding:Ground Balancing in the Field
Ground balancing is not a difficult procedure, but it is critical if you desire maximum depth and stability. It is especially important if you plan to find deep relics or prospect for gold nuggets.
To ground balance in the field, we will start by assuming your detector is turned off. This will be the normal condition of your detector when you start hunting. Ground balancing can be done at any time while you are using the detector. It is not necessary to turn the machine off each time that you ground balance.
Start with the controls in the following positions:
SENSITIVITY on OFF.
Mode in the ALL METAL position. Your Tejón can be set into ALL METAL by turning the DISC LEVEL knob counterclockwise until it clicks and leaving the TRIGGER SWITCH in the center position or by simply pulling the TRIGGER SWITCH back toward the handle and holding it in place.
All other controls will be set during the ground balancing procedure or are not applicable at this time.
Turn the detector on by rolling the SENSITIVITY knob clockwise to about 9 or 10 on the dial. You will hear the battery test to let you know the detector is operating. Next, adjust the THRESHOLD knob until a slight, steady hum is heard. The machine is now ready to be ground balanced. Next, find an area that has no metal targets in the ground, as this may give false readings while in the ground balancing procedure.
As shown in the photos, raise your searchcoil about 6 to 8 inches off the ground. This is high enough so that the detector will no longer read the minerals in the ground. While listening to the threshold sound, lower the searchcoil to about 1 inch off the ground. As the coil is dropped. This is the balanced response. When you get a balanced response, the detector is telling you that it is ready to hunt.
The positive and negative responses are easy to adjust. If you get a positive response, turn the GROUND ADJUST knob toward the minus sign on the face or in a counterclockwise direction. Getting a negative response means turning the GROUND ADJUST knob toward the plus sign on the faceplate or in a clockwise direction.
Here is an example of balancing: After setting up the detector, you raise the coil and then push it to the ground. As the coil drops, the threshold hum gets louder. You then turn the GROUND ADJUST knob counterclockwise toward the minus sign. You pick up the coil and push down again. This time you get a slightly negative response. Turn the GROUND ADJUST knob a little bit toward the positive or in a clockwise direction. When raising and lowering the coil, the threshold makes no change as the coil is dropped. At this point, the detector is balanced for the area and is ready to hunt.
Ground balancing is a learned skill, one that you should practice often. It is easy to practice almost anywhere— your front or backyard, a local park, or a fair-sized flower garden. When you are practicing, make sure that there are no pieces of metal underneath your coil that may cause a target sound.
NOTE: Please remember that the coil must be lifted straight off the ground. Swinging the coil in an arc, like a pendulum, will cause false readings and will result in an improper ground balance.