Fisher 1236-X2 用户手册
14
Figure 7. Keep the
search coil parallel
and as close to the
ground as possible.
search coil parallel
and as close to the
ground as possible.
Now comes the fun part if you follow a few simple rules. Good search
techniques are every bit as important as a good detector.
techniques are every bit as important as a good detector.
1. The 1236-X2 has two operating modes. The
“Search” mode is activated simply by turning the unit
on. This is a “VLF-Motion Discrimination” mode that
automatically ignores most ground minerals, rejects
junk and works only when the search coil is moving.
The “PINPOINT” mode is activated by depressing the
PINPOINT button and will be explained later.
2. Set the FREQUENCY control at zero.
3. Adjust your SENSITIVITY control. Only experience
will tell you how much sensitivity to use in any given
situation, but start out at 8.
NOTE: As a general rule, turn your sensitivity down
to reduce excessive false signals caused by highly
mineralized ground or interference caused by power
lines, radio stations, etc. Turn it up if you want those
deepest, smallest targets and you’re willing to put
up with a few more false signals.
4. Decide how much discrimination you want to use.
a. In relatively non-trashy soil use a low level of
discrimination (2 for example) with the SILENCER OFF.
In this manner the 1236-X2 will detect all metal targets
“Search” mode is activated simply by turning the unit
on. This is a “VLF-Motion Discrimination” mode that
automatically ignores most ground minerals, rejects
junk and works only when the search coil is moving.
The “PINPOINT” mode is activated by depressing the
PINPOINT button and will be explained later.
2. Set the FREQUENCY control at zero.
3. Adjust your SENSITIVITY control. Only experience
will tell you how much sensitivity to use in any given
situation, but start out at 8.
NOTE: As a general rule, turn your sensitivity down
to reduce excessive false signals caused by highly
mineralized ground or interference caused by power
lines, radio stations, etc. Turn it up if you want those
deepest, smallest targets and you’re willing to put
up with a few more false signals.
4. Decide how much discrimination you want to use.
a. In relatively non-trashy soil use a low level of
discrimination (2 for example) with the SILENCER OFF.
In this manner the 1236-X2 will detect all metal targets
SEARCHING
15
Figure 8. The 1236-X2 is
balanced for sweeping in
a tight semicircle. Always
overlap your sweeps by at
least 50% or you’ll miss a lot
of the deeper targets
balanced for sweeping in
a tight semicircle. Always
overlap your sweeps by at
least 50% or you’ll miss a lot
of the deeper targets
SEARCHING
within its range and you can instantly increase the
discrimination for further identification.
b. In trashy areas you’ll probably want to operate
at a higher level of discrimination (6 for example)
with the SILENCER switched ON to cut down on the
amount of time you spend digging bad targets.
5. Keep the search coil moving at a comfortable rate.
Remember that the 1236-X2 is a motion detector and
responds only when the search coil (or the target) is
moving while in the Search mode.
6. Keep the coil parallel to, and as close to the
ground as possible. Keep the search coil parallel to,
and as close to the ground as possible.
7. Overlap your sweeps approximately 50 percent.
8. Search in a methodical manner, sweeping in a
tight semicircle. Pay close attention to where you’re
going and where you’ve been.
9. TAKE YOUR TIME. Also very important. If you walk
too fast you can’t overlap your sweeps and you’ll
miss a lot of ground.
NOTE: If you sweep too fast, you’ll lose sensitivity and
miss the deep targets.
10. The figure below shows the search coil detection
pattern and how it is affected by sweep speed,
discrimination level and overlapping sweeps in the
Search mode.
discrimination for further identification.
b. In trashy areas you’ll probably want to operate
at a higher level of discrimination (6 for example)
with the SILENCER switched ON to cut down on the
amount of time you spend digging bad targets.
5. Keep the search coil moving at a comfortable rate.
Remember that the 1236-X2 is a motion detector and
responds only when the search coil (or the target) is
moving while in the Search mode.
6. Keep the coil parallel to, and as close to the
ground as possible. Keep the search coil parallel to,
and as close to the ground as possible.
7. Overlap your sweeps approximately 50 percent.
8. Search in a methodical manner, sweeping in a
tight semicircle. Pay close attention to where you’re
going and where you’ve been.
9. TAKE YOUR TIME. Also very important. If you walk
too fast you can’t overlap your sweeps and you’ll
miss a lot of ground.
NOTE: If you sweep too fast, you’ll lose sensitivity and
miss the deep targets.
10. The figure below shows the search coil detection
pattern and how it is affected by sweep speed,
discrimination level and overlapping sweeps in the
Search mode.
1236x2 manual-8704810.indd 14
6/9/06 10:09:00 AM