Reactivity is a vital setting that determines the detector's performance in terms of speed of analysis and selectivity. It regulates how quickly a device can be reactivated after passing over one target in order to be ready to distinguish the next one.
If a soil contains a great deal of iron, hot rocks or other mineralized debris, soil penetration is generally reduced, as is a detector's ability to identify targets similar to iron.
In these conditions, DEUS enables you to select a high degree of reactivity which will help you speed up the analysis of signals.
On the other hand, if the ground is 'clean', it is better to reduce the reactivity and sweep more slowly, in order to be more sensitive to deep masses and obtain more thorough penetration. By way of example, and to help you better understand the reactivity levels available, you should note that the reactivity of most detectors on the market is generally only equivalent to level 1 of the DEUS.
Most likely finds with the recommended settings are as follows:
0: Large objects and coins, in ground uncontaminated by iron.
1: Large objects and coins, in ground with little iron contamination, and general use.
2: General use, and mineralized soils contaminated with iron.
3: Difficult soils contaminated with iron, hot rocks, etc.
4/5: Very difficult soils, highly contaminated with iron and hot rocks, sensitivity to small targets.
Higher reactivity levels (3, 4, 5) enable the detector to tolerate fast sweeps better.
In terms of pure performance, the greatest detection ranges are obtained with low reactivity levels. However, you will find more targets on difficult ground with medium or high reactivity levels. So do not just rely on performance in optimal conditions.
Depending on the reactivity level, you will notice that the length of the audio signal varies when it passes over a target:
- Low reactivity (0, 1) = long sound
- High reactivity (3, 4, 5) = short sound
Evidently the length of any false signals—the crackling of iron for example—will vary proportionately as well. You are therefore advised not to constantly change the reactivity level, as this may interfere with your ability to distinguish good and bad sounds.
First of all, you can use this DEUS menu to choose between the 2, 3 or 4 tones modes. Then if you wish, you can precisely adjust the sound frequency of each tone (from low to high). DEUS can also determine which segment of the target conductivity scale each tone corresponds to.
The main advantage of this flexibility is convenience for any users with their own preferences or habits concerning sounds. It is also interesting for anyone who enjoys experimenting and structuring their search methods. And it is particularly useful for any users with partial hearing, for instance, who may be able to hear some sounds but not others. In any case, a detailed knowledge of these Expert modes is not at all necessary for successful detecting, as the basic functions and programs are already sufficient.
This enables experienced users to match the power of the electromagnetic field to the specific characteristics of their environment. In particular, they can reduce the power on difficult ground, where it might otherwise interfere with interpretation of the signals.
Power has a subtle effect on the device's pure performance, especially when compared with sensitivity. However, it also has a non-negligible impact on the device's power consumption, and can influence stability when used on difficult ground.
DEUS enables you to adjust the power according to 3 levels (1 to 3). On iron-infested, mineralized ground, there is no need to use a high power setting, level 1 will be sufficient as you cannot detect in this kind of ground as deeply as in neutral ground. It is therefore better to limit the saturation caused by iron and the ground by lowering the power setting. In this way you will improve analysis and will ultimately find as many, if not more, targets since you will be better able to perceive them. In most of the programs, the power is set to level 2 by default, which offers a very dependable performance level that is largely sufficient in most cases.
Note: the power cannot be adjusted when the frequency is set to 4 kHz, it is fixed at the maximum level. You do not have access to the EXPERT menu when you are on this frequency. It is mainly reserved for a forthcoming XP accessory, which will be particularly suited to searching for large, deep masses.
Yes. If you want to modify the existing programs or create new ones, you can save any changes you make. When you switch on DEUS, you begin by choosing one of the ten pre-configured programs. You can then change them according to your own personal preferences (frequency, discrimination, etc.). You can use one of the 8 customizeable program slots to save a custom program.
Because we thought the 4 kHz frequency seemed too low for simulating the G-Maxx effectively.
On these low frequencies, switching from 4.6 to 4 kHz is quite a significant change. On DEUS the performance of the G-Maxx can be better matched on the 8 kHz frequency (in fact between 7.6 and 7.8 kHz). DEUS and its 9" coil coil will give better performance with coins on the 8 kHz frequency, rather than on 4 kHz.
So why did you decide on this 4 kHz frequency as the fourth available frequency?
This frequency was chosen quite simply because it is good at searching for large, very deep objects.
I notice that some programs have the same name as other XP metal detectors: Gold Maxx Power and G-Maxx. Do these programs really correspond to the performance of these detectors?
DEUS has very powerful digital circuits which enable it to simulate a number of other detectors on the market. For example, with the GMPower program, frequency, reactivity, power and discrimination... are almost identical to the parameters of the Gold Maxx Power. If you begin with this program, you can of course personalize it by modifying all the settings available in DEUS, then saving it.
It is totally comparable. Like with the Gold Maxx Power's iron threshold, the iron discrimination range on DEUS is 'magnified' to offer the same precision in identifying targets, but with the refinement of additional settings made possible by digital signal processing. With DEUS, discrimination can be adjusted to the nearest point between 0 and 100 and to the nearest tenth of a point between 2.1 and 10 (iron zone), thereby giving you around 80 setting levels for iron!
If you are an experienced detectorist you may wish to optimize your searches to achieve better penetration in mineralized soils. In magnetic ground with relatively uniform mineralization, a setting which is adjusted according to the ground effect will improve penetration by reducing the amplitude of the ground signals sent back by the receiver circuits. This 'adapted setting' involves adjusting your ground balance value to the mean value of the ground being prospected, while adding 1 or point so as not to hear the ground signals as much. The Tracking and Pumping modes do this automatically if the ground conditions allow it.
By default, remain in the manual mode at level 90 on inland ground and on dry beach sand. If the ground is not mineralized there is no need to adjust your ground balance to a level other than 90: since the ground does not send back any significant spurious echo the performance will be optimal even at level 90 and you will reduce interference resulting from knocks to the coil.
4 Ground Balance modes are available, MANUAL/PUMPING/TRACKING/BEACH:
- MANUAL mode:
You can manually adjust the ground rejection levels from 60 to 95 or from 0 to 30 (Beach On mode)
90 is the default level, it is the most common level which enables you to reject all magnetic minerals found in the ground.
By reducing this figure towards 87 you will begin detecting hot rocks, and knocks to the coil may result in false signals. Even lower, between 75/85, pottery and the ground itself will begin interfering with your device.
- PUMPING mode:
Pumping is a semi-automatic process which allows you to adjust the ground balance in a zone that you have determined as being representative of the mean level of the ground being prospected.
Henceforth, the measured value of the ground is entered in memory and used as the new active ground balance value.
If this value is unsuitable, or if it generates too much instability, you can repeat the process in a different zone or switch to manual mode in order to modify it by, for instance, adding several extra rejection points.
Note: If a metal target is detected while you are pumping, DEUS will recognize this and display the message "Metal! Invalid Measurement." It will then retain the previous ground balance value.
This problem is generally caused by iron being omnipresent. If this is the case then move to another location and restart the pumping mode.
Note: Similarly, if the ground you are on is not sufficiently mineralized to allow DEUS to extract an adequate value, DEUS will display "Non-mineralized, Measurement impossible."
In low- or non-mineralized ground, there is no need to adjust the ground balance and you are advised to remain on 90 for greater stability.
- TRACKING mode
Tracking mode is used to automatically correct the ground balance.
In this mode, DEUS repeatedly scans the ground and digitally filters the extracted signals to determine the mean value on a continual basis.
This mode may be useful in soils with relatively uniform mineralization, and where the mineralization varies gradually from zone to zone, which is often the case in naturally mineralized ground. In this case, DEUS automatically readjusts the ground balance according to the most recent value measured.
However, in ground where mineralization has resulted from human presence (ancient settlements, for example) this mode may be unsuitable due to the disparity in the ground events.
Indeed, within the same sweep of just one meter, a considerable variety of ground events may be encountered, ranging from one extreme to the other (values between 70 and 90): hot rocks, brick, slag, pottery interspersed with soil that is neutral or characterized by diverse mineralization. This may be to such an extent that any mean value would be meaningless. You must then determine an acceptable level of rejection for the ground based on your own experience of the site, your detection methods and the interference that you are prepared to tolerate.
Note: Always return to manual mode at level 90 in the event of interference, or use the pumping mode to adjust the settings over the ground zone that seems the most heavily mineralized.
- BEACH ON/OFF
ON: Activates calculation of the ground balance on the zone corresponding to highly saline wet ground, so as to reduce interference caused by conducting salt water. After selecting Beach ON, you need to adjust the ground balance manually, or by pumping on the wet zone concerned, in order to cancel out the ground signal.
Note: In wet zones (salt water), it is important to sweep while keeping the coil parallel to the ground, yet not touching it. Note: In wet zones select the Wet Beach factory program, and start your detection by pumping over the zone concerned.
The TRACKING mode is not available in BEACH ON mode because the PUMPING mode is much more effective and gives a more rational setting value. On the beach, pumping (moving the coil up and down above the ground) gives a more precise measurement value than sweeping.
Hot rocks do not register, as they have been somewhat 'notched' or inhibited. This trick gives you good stability regardless of the ground rejection level, however it also deprives you of the benefits of a well-adjusted ground balance, and worse, gives you the impression that your settings are well configured. Very often the deepest targets in magnetic soil are identified with a signature similar to that of hot rocks, and are therefore detected poorly with this kind of device (as they are 'notched').
DEUS on the contrary gives you full control over the ground settings. When you lower the ground balance (87-85-82 etc.) you fully accept hot rocks, which is the only way to obtain real gains in terms of penetration on certain magnetic soils.
Pitch mode is completely different from the others multi-tone mode. It does not take into account the target's conductivity. The strength of the signal generates an audio signal that varies both in amplitude and height (the audio frequency).
This means that a more distant target will generate a low-pitched, weak sound whereas a closer target will generate a high-pitched, strong sound. Pitch mode gives signals particular dynamism and can be useful for locating targets. It also makes the detector seem more reactive. However, it does not fundamentally affect reactivity, just the audio.
Not this one. Although the screen is perfectly readable in most lighting conditions, you can, if you wish, program the backlight to be on permanently, without this significantly reducing the remote control's battery life.
The Audio Response enables you to amplify the sound volume of distant targets and therefore to be more alert to them. It gives the sensation of greater power, however it does not provide any additional depth as this setting only affects the sound curve (the dynamic range of sounds).
Note: By amplifying small signals you will also be amplifying small spurious false signals.
Note: By increasing the sound response you will compress the dynamic range and thus reduce the appreciation of a target's distance.