Recently, such an activity as the search for antiquity in the ground has become widespread. Diggers are looking for everything - coins, medals, badges, ancient metal objects. To help such enthusiasts, special devices have been created - metal detectors. The X-Terra 705 Minelab is the best device in the Terra series of this brand. In the article, we consider its characteristics and features.
Instrument Features
The second-generation metal detectors, a continuation of the X-Terra series, use the long-proven VFLEX technology. When using it, two types of components are used - with mixed and with digital signals.
This innovation was introduced to improve single-frequency standard technology, which is implemented by replacing most of the analog circuits with digital signal processing. The rest of the analog circuits have been carefully redesigned to achieve highly sensitive characteristics, high performance in signal processing and stability in operation.
The radicalism of such a departure from the traditional design of metal detectors has become possible thanks to the latest advances in the electronics industry in the production of portable personal computers, mobile phones and compact high-quality audio equipment.
The X-Terra 705 metal detector, customer reviews confirm the convenience of this innovation, has two basic coil configurations:
- concentric - supplied, is universal;
- Double D - designed to work on mineralized soil and has a different type of signal.
Principle of operation
Metal detectors are designed to search for metal objects in the soil using an electromagnetic field penetrating the soil. Metals change this field due to current conductivity. When such a change is detected, the X-Terra 705 metal detector signals to the control unit, which in turn sends a signal to the operator.
The device can determine the shape, size and composition of metal objects that fall into the coil field. This device uses the main operating frequency of seven and a half Hertz - this number of signals the device transmits to the soil and receives back in a second. When connecting additional coils, the device can use two more frequencies.
Operating modes
The X-Terra 705 metal detector uses the following operating modes:
- search for coins and treasures;
- exploration in order to detect gold nuggets and ancient relics and metal jewelry.
The first mode is used when you need to find valuable objects in the form of coins of different years of circulation, jewelry and antiquities. The device gives excellent signals when it finds a target or something that needs to be ignored (for example, canned lids), so it will be easy for the operator to conduct a search.
In this mode, the device can conduct search operations in the area of parks, forest zone and beaches of the seas.
In the exploration mode, searches are carried out for objects such as gold nuggets and relics on complex soils with high mineralization. The device responds with a sound signal to find the target. This mode activates the sensitivity of the metal detector to small targets.
Work accuracy
The accuracy of the second-generation devices, including the X-Terra 705 Gold metal detector, is guaranteed by the manufacturer. This means that they are reliable in operation and perfectly adapted to adverse conditions, such as electromagnetic interference, soil mineralization, sudden changes in temperature and other climatic factors.
VFLEX technology involves the use of precisely designed and meticulously calibrated coils. Each launch of the device causes the microprocessors located in the control unit and the coil to establish a contact using the digital information transmission line. Data from the coil comes to the control unit, so the detector determines its type and sets the appropriate parameters for operation. This indicates that the detector can operate at a different frequency, which depends on the electronic characteristics of the connected coil. And this is the technology of the future.
What to look for
The manufacturer of X-Terra 705 detectors warns that the device must be turned on not in the room, but in the open. This is due to the fact that indoors there may be metal objects such as nails or fittings that are a source of electromagnetic interference and can lead to overloading of the metal detector electronics. Potential interference may also come from household appliances and televisions.
If such an interaction occurs, the probability of unstable operation of the detector will appear. In the event of an overload, the X-Terra 705 gives a sound signal and OL on the display - this means that there is a danger to the electronics and the detector needs to be moved to another location.
You also need to remember that the device saves the settings entered for each of the modes. When the operator changes the search mode, the adjusted settings are flashing for three seconds.
Do not forget that most screen images displaying the settings of both modes show only the first - the coin search mode.
Advantages and disadvantages
Like any device, it has its pros and cons and the Minelab X-Terra 705 metal detector.
Customer reviews note such positive qualities of the device:
- the availability of the ability to work in three frequencies;
- going fast;
- has a removable power supply;
- simple and intuitive to use;
- the presence of an informative screen, not overloaded with unnecessary information;
- fast signal analysis;
- perfectly separates metals;
- automatically sets the balance of the soil;
- good “visibility” of small objects at a high frequency;
- the coil is waterproof - can be deepened by half a meter.
Of the minuses, consumers note that the device has a weak mounting of the rod to the coil and the power supply is not protected from high humidity, although it is positioned as waterproof.
Detector Care
In order for a high-quality electronic instrument to meet its purpose well, it needs appropriate care. The X-Terra 705 also belongs to such devices. Reviews say that it is quite simple to maintain this detector:
- the device should work at temperatures from zero to plus forty-five degrees Celsius, and stored - from minus twenty to plus sixty five;
- Avoid contact of the device with petroleum fluids such as gasoline and others;
- keep the detector dry and clean, make sure that the hardware is not littered with sand;
- Do not use solvents for cleaning;
- the detector must be turned off before replacing the coil.
Subject to all the above rules, the manufacturer guarantees a long and flawless operation of the metal detector.