Familiarity with the device
Bringing home the metal detector, first carefully read the attached guide. If the instrument is simple and has one, two or three adjustment knobs, with it, you will understand quickly. In the case when you have bought a computerized device, then it is better not to rush and make the leadership and by the instrument itself.
The most important controls at the metal detectors are the following three:
1. Configure threshold background.
2. Ground balancing (balance-pound).
3. Discrimination.
Simple metal detectors usually have automatic settings and the balance of the pound". You just turn the unit on and select the desired level of discrimination. Computerized devices typically have several factory search, as well as several programs that you can create for yourself, and remember them. In any case, you must first familiarize yourself with the device and explore all its function. To do this, the assembled device is put on the table or chair, not having the metal parts. Install the coil perpendicular to the rod. Turn on the device, adjust, if necessary, set the discrimination to zero, and sensitivity conferring 3-5.
Pick up to test a variety of metal objects, It may be 2-3 type iron nails, pieces of foil, the tab from the can, tube (iron and aluminum), gold and silver rings, any jewelry and different coins. Then in turn spend these objects in front of the coil a distance of 8-10 cm from it. The device will give a positive or a negative signal. Typically, this procedure is described in the attached guide and you need to follow this description.
During these tests you will find that at a certain level of discrimination the unit does not respond to iron nails and tubes by increasing the level discrimination device does not react on the foil (it's a candy and cigarette wrapper). However, with further increase in the level of discrimination when you you want to discriminate out aluminum tubes and tabs from cans, you angrily detects that the appliance ceases to respond and thin gold rings and chain. Therefore, discrimination must be used with caution.
First steps outdoors
So you met with the operation of the device, learned what it sound like, reacting to different objects at different levels of discrimination. You are now ready to test the detector in nature. It can be a small lawn about home.
You may have to adjust the rod length and angle of the coil in relation to your growth.
Rod length should be such that even after prolonged use you are not felt fatigue. The handle of the unit must be freely elongated hand.
In the process of finding you have to move a coil from side to side in an arc or in a straight line, using t o this movement of the shoulder. Coil with this should be parallel to the ground at a distance of 2-3 cm from it. This movement the coil is called a scan.
Instrument setup in the nature practically does not differ from its setting at home, at with the exception of the need to perform ground balance (ground balance" - Ground Balance) if your device has this pen. This is a very important point settings, which largely determines the practical the sensitivity of the device. The fact is that during the configuration process, you must enter in the measurement device of the degree of mineralization of the soil, i.e. a kind of zero point countdown. If this is not done or done poorly, the device will either spontaneously excited in response to irregularities in the ground, or when it stable operation will significantly decrease the sensitivity. Need gold the mean, in which the device is stable and the maximum sensitivity possible. Procedure ground balancing is described in detail in the instructions to device. From experience one can say that you need to carefully choose the site for this adjustment. Check that the plot was smooth, keep the coil on a distance of 5-7 cm from the ground. After detuning it is necessary to check whether in this phase of the metal. If the unit caught any signal from the black or color metal, the detuning from the pound should be repeated on a "clean site".
Fig.24. Move the search coil from side-to-side (scan) the search process
Most simple devices have automatic averaged ground balanced soil. Manual ground balance more accurate and increases the depth of detection. So, you set up the device and ready to search. The first few days, it is recommended to look at the mode "All metals", i.e. the handle of discrimination put on zero. You will be to dig a lot of trash, but it is useful for practice.
In order to better learn how the instrument will behave in the field, useful choose an area free from metal, and bury it at different depths some coins and items from the category of waste, and then to see how the device responds to them in "All metal" and "Discrimination". Objects bury at a depth of from 5 to 15 cm and at a distance of at least 30 cm from each other. Draw the layout of your objects, in order to be sure what and where buried and at what depth. Practice on these sites, getting used to the signals device. It will also allow you to choose the optimal scanning speed. Such test site - the best tool to hone your skill on search in earth objects by means of the metal detector.
The detector is most effective when in the process of scanning coil held close to the ground. This increases the depth of object detection and response to small objects. It is very important to learn correctly scan the surface of the ground coil. The reel should hold all the time at a constant height from the ground.
A typical beginner mistake is lifting the collar of the coil above the ground at the ends of the strokes 15-20 cm it a Habit not to do it, because losing the depth of search. Better reduce the width of the stroke or sweep the coil in front of us in an arc, and a straight line. This method allows to treat a large area and to control the height of the coil above the ground. The speed of movement of the coil when scanning is 50-70 cm/sec. However, if in a land of many objects for example coins, the speed can be reduced up to 10-15 cm/sec. Given that the detection area of the object under the coil has the shape of a cone, then for completeness of the treatment area each stroke should overlap at least 50%.
Every time the device makes a beep, try before digging guess what this discovery, the size and shape and depth of what is. Analyze the audio signal and the information on the display (if any). If you guessed right, fine. If not, try to determine why. Than the more you do it the better you get, the faster you learn how to work with a metal detector and to understand all of what he informs you.
When you dug up the find, check the hole with a meter to ensure that it nothing more. Always bury fossa. Collect the trash that you are dig to get him in a secluded place away from processed plot.
Having received the signal, it is necessary to determine the exact location of Some object the devices have a special PINPOINT button, when clicked, the device switches to static mode and the positioning of the object can to occur at a stationary coil. With a small movement of the coil the maximum volume of the signal will be when the object is just below the center of the coil.
For a more precise definition place the coil on the ground directly above object. Stir the coil along the ground from side to side and front to back. Find a place where there is maximum volume when both movements. In this place under the center of the coil and the location of the object
If the device does not have the PINPOINT button, the position of the object is also easy to learn, and it can be done in several ways.
It is best to define the position of the object by Phillips move on it coils, working in the mode "All metals". Remember that the signal is always the most loud when the object is directly under the center of the coil Spend coil above the first object from side to side, then back and forth until long as you don't define the center of the cross - the place on earth where the signal is most loud.
The positioning of the object in the "Discrimination" is also done with Phillips moving coil. Remember that the unit gives a short beep, when the object is near the center of the coil. Lowering the velocity of the coil makes it easy to locate the center of the cross, because the response of the device to the object decreases at low speeds, making it easier to correlate the sound with the center coil.
The metal detector stopped working
Usually, with proper handling metal detectors are long. Thus, the firm "Tesoro" gives warranty on their appliances for 25 years (assuming a single user). Author successfully use the device Coinmaster 6000 firm White's, purchased back in 1980
However, minor repairs from time to time happen, and you have to be to it is ready and not to be afraid when the device suddenly stopped working. Before start looking for the cause malfunction of the device, check the batteries. Maybe the whole thing in them. If the battery is normal, please note the following points. Cable, connecting the coil with the electronic block contains 4-5 wires. With frequent disconnecting the cable is able to break one of the wires from the connector pins. Sliding protective cover connector, you can get access to the wires, test them and to correct the defect.
Sometimes at the device the sound disappears. This happens in case of breakage of wires to the speaker, or by ingestion of foreign objects into the headphone Jack. If the nest clean and the unit works with headphones, it's all in the dynamics.
Need or to solder the broken wire, or replace the speaker.
A number of faults can be linked to the coils. Generally, the coil is sealed, but sometimes when used carelessly they can cause cracks through which allow the flow of water and removes the device from breaking.
Bumps hollow coil of trees and stones may break off wire, suitable for screen coil, whereby the unit stops to work. In recent times firms have switched to celenrity coil, which, although slightly heavier, but more reliable.
Finally, the device may refuse if water enters the electronic unit. When in some cases, you can burn the chip, in other cases after drying the device begins to function normally again.
When working in the rain, it is recommended to put on protective electronic component case, and the device try not to drop into the water. Most metal detectors controls (switches, switches, potentiometers, etc.) are not protected against ingress of fine sand and dirt that eventually can lead to the failure. To avoid this, it is recommended to wear on the handle switch the rubber band from the pipette and thread to fix it on the thread switch.
When you hit the mud in rotary controls there is a jamming or shortness of handle rotation. If you install under the rubber grip ring, it will prevent a possible defect.
Author: L. V. Bulgak