37
of targets it cannot readily identify. Therefore, if
po95 is ACCEPTed, questionable targets
may be dug that indicate this number and can
produce some interesting recoveries. A good tip
regarding po95: If a target indicates 95,
and the depth display indicates it as being fairly
deep; dig it. If the depth display indicates it as
being fairly shallow, it is more likely to be trash or
a hot rock. HOT ROCK REJECT in the Pro Options
has 20 levels available for the acceptance or rejec-
tion of +95. An operator can adjust HOT ROCK
REJECTION to suit personal preference and area
demands. (See page 42.)
The first 30 to 40 negative numbers below zero also
impact detection depth. Most iron indicates further
into the negative numbers. Thus the first 30 to 40
negative numbers can often be ACCEPTed without
digging much iron. ACCEPTing from the positive
numbers down as low as minus 30 to 40 has the
largest impact on the lower end of the positive
numbers. Sensitivity to small jewelry is increased.
However, sensitivity to foil is also increased. On a
beach or in a park that has lots of small foil,
ACCEPTing down to minus 30 to 40 may not be
practical. While ACCEPTing these minus numbers,
a reduced sensitivity setting may help eliminate
some of these small bits of unwanted foil.
ACCEPTing all V.D.I. numbers will produce the
best overall detection depth however, with the
amount of trash in most areas, searching with no
rejection is seldom practical. TONE I.D. is a more
practical choice. The idea of discrimination is to
ACCEPT V.D.I. numbers most likely to be valu-
ables and to REJECT the V.D.I. numbers most
likely to be trash. Digging ease, and acceptability in
an area will also decide the amount of ACCEPTed
V.D.I. numbers desired. No metal detector can
reject all trash while accepting all valuables. The
deeper you want to detect, the more trash you will
need to accept and dig.
The detector sees metals electronically; thus some
valuable and non-valuable targets may look identi-
cal to the detector. To select ACCEPT and RE-
JECT V.D.I. numbers is to gamble that the areas
you select for ACCEPT will be good targets, and
the area you select for REJECT will be trash
targets. A factory program which uses the law of
averages usually produces more good targets than
trash. The EDIT feature allows you to fine-tune the
ACCEPT and REJECT settings for your area and
types of desired targets, further improving these
odds.
Chapter 5 DFX
™
Pro Options
