Searching with the PULSE STAR II is particularly easy when the 1m coil is
carried by two people. With the help of a special long shoulder strap, the
1m coil can be used by a single person: one hand directs the coil, leaving
the other free to operate the electronics unit. Before beginning to search,
select the desired switch position of SAMPLING DELAY with
NORMAL or SILENT mode (see chapter 2 and 3). Searching in
SILENT mode is recommended when maximum sensitivity is not really
required, i.e. for objects not buried very deep.
In areas where a lot of uneven ground has to be covered, it is advisable
to search systematically. You should grid large areas with poles and strings
(strips approximately 32 inches wide). If using a two meter by two meter
coil then grid off areas approximately 64 inches wide. It is also important
that the grid areas are overlapping while searching because the search coil
has its highest sensitivity in its centre.
Walk on the grid areas at a slow walking pace. Should the surface allow it,
hold the search coil at a constant height of about four to eight inches from
the ground. Should the tick-rate change due to magnetic soil (for example
caused by large concentrations of iron oxides), move the MODE
switch momentarily to RETUNE. You do not have to hold it for more
than a split second. Iron oxides can cause the tick-rate to increase (see
chapter 6).
| We would like to remind you (again) that both persons should have no
metal on their shoes or boots. The person carrying the PULSE STAR II should
place it on the side of the body away from the coil. |
When first receiving a signal, it is advisable to obtain more information
about the object detected. You can learn, with experience, if the buried
object is large and possibly how deep it may be buried.
The strength and duration of the signal will give you this information. For
example, a small object buried only a few inches deep, will give two signals
as each edge of the coil passes (see Fig. 9). By moving the search coil higher,
the small object will disappear.
With the help of the 10 inch coil you can also identify small objects shallowly
buried. An object of the size of a soft drink can (for example), buried
approximately 20 inches deep, will give a very clear signal (see Fig. 10).
On a large object buried deep, you will receive a longer signal indication
(see Fig. 11). To determine the exact location of a buried object, walk slowly
further in the direction of the strongest response. When you feel that the
exact spot has been reached, place a marker on the ground, then change
directions. Approach the buried object at right angles (90° to the right
and left) of the original path to obtain a further optimum signal.
If you receive a very strong signal, it is advisable to momentarily move
the MODE switch to RETUNE while over the object. The sensitivity
will be greatly reduced and you will receive a peak signal directly over
the object. Do not forget to RETUNE again to reset the sensitivity
before carrying on searching.
You can also determine the kind of metal (ferrous or non-ferrous) of any
object with 4 inch diameter or larger as long as it is within the metal
discrimination range (approximately 60 to 80% of the normal detection range).
See also chapter 1 (Function) for details about the discrimination feature.
In order to identify the object, motion of the seach coil is required. You
must walk steadily across the buried object and observe the LEDs on the meter
(or you may move the MODE switch to SILENT to obtain an additional
audible identification). If a weak signal is received, it is advisable to
repeat the measurements several times to obtain a clear indication (ferrous
or non-ferrous) of the object that has been located. |
 |
| Fig. 9: Small object not buried deep |
 |
| Fig. 10: Medium size object (approx. 20" deep) |
 |
| Fig. 11: Large object buried deep |
|
| IMPORTANT: Between each measurement a minimum pause of three seconds
is required. The LEDs have to be off and the meter needle has to come down
to zero. Only after this pause the next measurement can be made. This will
allow the PULSE STAR II to retune itself. |
The metal discrimination for the PULSE STAR II was developed with the 10
inch (25cm) round coil and the one meter coil. Using the large two meter
coil may cause some false identifications with metal discrimination.
| IMPORTANT: Do not forget to turn off the PULSE STAR II after each search!
Otherwise, the battery will be completely discharged and may lose some capacity
to recharge. Total damage may also occur (see chapter 7 and 10). |
A further note: If you should hear short continous beeps every seven seconds
then the battery is low. You will be able to search for approximately twenty
more minutes, nevertheless, you should recharge the battery as soon as possible.
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