That's the part that's confusing because when e speak of Discrimination, we are addressing the ability to reject unwanted junk. However, when we are describing the range used fr the Disc. circuitry, such as ED-120 or ED-180, it is more directly describing the amount of
[acceptance[/u of the Disc. range above the rejection point. The terms ED-120 and ED-180 were put into active use by Tesoro's originator, Jack Gifford. An easy-to-explain or understand description of the terms was explained to m back in '87 by John Earle, the design engineer at Compass Electronics, where I worked at the time, who is now with White's.
Bobby s said:
So I saw a post on another forum where someone got a new tesoro catalog when they got their detector back. From what he was saying the cibola and vaquero are now listed as having ED 120. It doesn't bother me a whole lot because I've learned to deal with how my Vaquero discriminates, but it's kind of upsetting that they advertised it before as having ED 180 if it really doesn't. If what he's saying is true that is.
First, as others have explained, such events are often a misprint. This can happen with any manufacturer as they copy a catalog or Owner's Manual of on model in making another and it is over-looked, and/or not properly edited.
A Second thing that can happen is that whoever wrote the original copy to describe a model didn't know or confirm what they were writing for the person to do he final manual or flyer, so from the start the description can be incorrect. In this case, with the Vaquero and Cibola models, they were advertised as having an ED-180 range of acceptance, when adjusted to their minimum Disc. setting, bu they didn't, so that was a Tesoro error from the get-go. The do accept more lower-conductive targets than an ED-120 range model would accept, bu they do not adjust to a full-range of acceptance, better known as a true 'zero' rejection or an all metal accept setting.
Note that simple description of a TRUE ED-180 Disc. range detector. When set at the [i[]minimum[/i] Discrimination level, they are a true
All Metal Accept setting, or you could say a true
Zero Discriminate setting. That means the same thing, and any amount of rejection wen at the lowest Disc. setting to knock out ferrous targets or even lower-conductive non-ferrous targets is really describing a model that lacks a true all metal accept or zero rejection setting. The ED-120 range, for example explains that those models are supposed to be
accepting only the more non-ferrous targets that have conductive properties that fall above the typical iron nail range.
Now, I don't know where Sven got the needle gauge that he put in his post blow, but it obviously doesn't 'fit' the description Tesoro uses in their ED-120 Disc. explanation but it is close. Actually, it is close to a 'proper' description of what I have referred to s
A true Progressive Discrimination Range as we knew it with the good old traditional TR-Disc. models, but as most know, the blasted Bottle Caps don't follow the rule with our moder motion-based GB-Disc. type Discriminators. Too often Bottle Caps read higher, in he penny-to-quarter range, and some other ferrous-based targets also register higher than a true TR-Disc. would reject them.
Note, however, that his needle gauge shows smaller iron nails and larger iron nails in the '0' to '40' VDI range, and at a VDI numeric reference of about '60' it supposedly knocks out a Steel Bottle Cap. That makes it close because if you deduct '60' points of rejection from an ED-180 range of
acceptance you end up with 120
