help with explorer II

[Anonymous]

Hey all I need some help with the Explorer II
Hope someone will be able to help me out! I bought md about 3 months ago I have got to take it out 3 times as of yesterday.
Here is a little bit about how it went and how the detector acted outside, inside
The area I was detecting should be littered with coins.

 

[Anonymous]

There are so many electromagnetic signals inside of a house, electrical wiring, TV set, lighting, that it is very difficult to do test inside the house unless we decrease the sensitivity to a very low setting and use Semi-auto Sensitivity. The tell us in the Owner's Manual that we cannot use it inside of a house.
Outside, you are describing what happens in a yard that is full of iron and other types of metals. If you go to IM-16 you will see and hear all that iron and other metal. The large pieces of aluminum sound with a high tone. We know that they are large pieces of metal because of their size. Digital reading will also indicate they are large pieces of iron. If you put a coin on the ground and cannot detect it then the detector coin is being masked by the other metal. One way this can happen is if the threshold is in null from rejecting a target while we sweep the coil over the coin. Also, if you are close to a wall where there is a TV on the other side it is not going to work or if under power lines or a transformer. It takes a distance of about 20 feet from those sources to operate properly.
Go to the menu then select and clear. Then select just coins. Don't put X by any icon as of now. Be sure you are in Semi-auto to start with. Set the sensivitiy to 28 and audio gain to 10. Find an area in the yard free of metal and noise cancel with the coil flat on the ground. You should be able to detect a coin dime at a good 8" with a good crisp sharp hit.
It is very important to read the manual and set the volume, variability, limits, threshold, and other setting as you learn the detector for your hearing. This will make the difference in ultra depth that you can hear a coin.
I would start by doing a reset by holding the power button down for about 15 seconds as the detector goes to the factory presets. If none of this help then we can go from there and check to make sure you don't have problems with the detector.
HH, Cody

 

[Anonymous]

You addressed a number of issues in your post. This response is directed at your inside the house test.
<STRONG>WHEN THE CURSORS MOVE</STRONG>
The detection of a target goes through the following sequence:
* The target is detected and the tone ID is generated immediately.
* After the tone ID is generated the detector will go into a very short null. That null is so short that it is almost undetectable.
* After the null is generated, then the detector will return to a threshold.
* Only after the threshold returns does the cursor change positions to indicate the target.
WHEN THERE ARE SEVERAL TARGETS IN CLOSE PROXIMITY
Consider the case where you place a number of coins in close proximity. As you sweep the coil over coins there will be a series of tone IDs in succession. The tone IDs can occur so rapidly that one tone runs immediately into the next. It is this feature that allows the detector to notify the hunter that there are multiple targets close together. In order to do this there is no time for the detector to go through the recovery null process and move the cursor. Even if the detector did move the cursor, it would be difficult for the eyes to "follow the bouncing cursor". But, your ears can clearly distinguish the series of tones to determine if there was something of interest detected. As a result the cursor will remain in a fixed position until a recovery null is generated. Only then will the cursor change position. This means that the cursor will only identify the last target detected in the series of targets very close together.
WHAT DOES ONE DO WHEN THE TARGETS ARE CLOSE TOGETHER
When targets are so close together that the cursor does not change position, then one can do two things.
#1 Learn the tones well enought that the hunter gains an understanding of what kinds of targets are down there without looking at the screen.
#2 Sweep the coil more slowly to separate the targets sufficiently to identify the individual targets.
As the targets get closer together, then it becomes increasingly difficult to even tell that there are multiple targets under the coil because of target averaging. Sweeping the coil slowly over the target from different directions will give additional information about the target(s).
<STRONG>HOW THE HEIGHT ABOVE THE COINS EFFECTS THE RESULTS</STRONG>
When the test was run with the coil slightly above the coins you will notice that the cursor did not move. This is because when the coil is close to the targets, then the tone ID will last much longer. This means that the targets tend to overlap one another. When the coil is higher above the coins, then the tone ID last for a much shorter time and gives the recover null a chance to take place.
I hope that this helps.
HH,
Glenn

 

[Anonymous]

Capt Kirk
I sent you a question on Sunday "Cherry Picking" on the Forum. If you get a chance, please respond to it .
Thanks Fred D. Upstate N.Y.