Whites TM 808 Manuel utilisateur
Instruction Manual
TM 808
(English Edition)
NOTE:
To locate large metal in normal conditions, set the controls as
shown above. Walk briskly, noting areas that produce an increase in
sound - beep. Cross these areas from at least two sides ( X ) to pinpoint
target location. When AUTOMATIC THRESHOLD is in AUTO, detector
must always be moving to respond to targets. NO-AUTO doesn't require
motion to respond to targets.
A Message from...
Kenneth R. White
Congratulations, and thank you for choosing the TM 808.
As an avid detectorist, I commend you for making an excellent choice
in deep seeking equipment. White's continually strives to achieve
performance and reliability above and beyond your expectations.
Your new TM 808 has been hand built and carefully tested. Properly
cared for, it will last years.
The following instructions are intended to familiarize you with this
fine detector, and give you a good understanding of the basics. Obvi-
ously, there is no substitute for field experience. Practice using your
detector in the field, and study this manual carefully. Before long
you may be able to teach the experts a thing or two!
People use White's metal detectors to find valuables every day.
Regardless of a metal detectors performance, it is the operator who
makes the critical decisions that result in great recoveries. A metal
detector is simply a tool which greatly increases the capabilities of
the user to find such valuables. Knowing your detector, and re-
searching good places to use it, are key elements to successful metal
detecting.
Another important factor today is obtaining permission prior to
searching private property, and the necessary permits prior to
searching publicly owned lands. These steps, as well as refilling dug
holes, and removing trash you discover, will go a long ways toward
protecting the hobby from future restrictive legislation.
We know in a very short time you will be using the TM 808 to help
you find valuables. We are proud to continue White's tradition of
high performance and reliability with your TM 808.
(3)
Table of Contents
Assembly .................................................................................................. 4
Batteries ................................................................................................5-6
Description of Controls
Threshold ..................................................................................7
Signal Balance ..........................................................................8
Ground Balance ........................................................................9
Automatic Threshold ................................................................ 10
Push-Button ............................................................................. 11
Headphone Jack ..................................................................... 11
Operation
Tuning (Ground Balancing) ................................................12-14
Locating Metal ......................................................................... 15
Determining Metal Depths.............................................. .........16
Caring For Your Instrument......................................................... ........... 17
Warranty Statement ................................................................................18
NOTES ................................................................................................19
Carton / Carry Case ..................................................................Back Cover
Manufacturers Information ........................................................Back Cover
Assembly Instructions
1) Remove all parts from the shipping carton, taking note of how the instrument
fits into the inserts. Save this carton (and inserts) for future storage or travel.
See back cover for further Carton / Carry case instructions.
2) Assemble the front loop or antenna as shown, by compressing the button on
the short rod protruding from the front of the control box, sliding the loop onto this
short rod, and aligning the button on the control box short rod with the hole on
the front antenna so that it locks into place. Use the thumbnut and bolt to further
sucure the antenna.
3) Assemble the rear loop or antennas as shown, by compressing the button on
the short rod protruding from the rear of the control box, sliding the loop onto this
short rod, and aligning the button on the control box short rod with the hole on
the rear antenna so that it locks into place. Use the thumbnut and bolt to further
sucure the antenna.
4) Continue by reviewing the next section on Batteries.
(4)
Front Loop (Antenna)
Short Rod
Front Of
Control Box Short
Rod Rear Of
Control Box
Meter
Rear Loop
(Antenna)
Battery
Pack
Control Box
Control
Panel
Handle
Thumbnut
&
Bolt
Thumbnut
&
Bolt
The standard battery holder supplied with your instrument holds four "C"
size batteries. Alkalines are recommended as they supply more consistent power
for longer time periods. Rechargeable "C" size batteries may also be used in this
holder, although they will need to be removed from the holder for recharging.
Using The Standard Battery Holder:
1) Remove the battery holder lid by applying gentle pressure down on the two
locking tab openings on one side (just enough so that they unlock), flip the pack
over and apply gentle pressure on the other two locking tab openings. The lid will
then slip off.
2) Insert the small foam squares inside the two springs on the lid, and
the two in the holder, to prevent loss of spring tension
3) Note the position of each cell. The flat side of each battery cell fits against one
of the four springs. There are two springs on the lid, and two in the case. The bat-
teries fit alternating +, -, +, -.
4) Install new "C" cells. Caution: If the cells are put in backwards the detector
may blow a fuse. Fuses can only be replaced by authorized service centers.
5) Line up the locking tabs on the lid with the locking tab openings on the battery
holder. Snap the lid and holder together.
6) Open the battery compartment door on the side of the control box nearest the
rear antenna, by pulling the battery door knob.
(5)
Batteries
“C” Cell HOLDER
FOAM
SPRING
PUSH FOAM
TO BASE
OF SPRING
7) Insert the battery holder into the detector so that the decal on the battery
holder is facing toward the control panel of the detector.
8) Close the battery compartment door by first pressing on the door itself to
close and hold it into position, then press the battery compartment knob in, until
it snaps locked.
Rechargeable Batteries
Although this instrument doesn't normally come with a recharge-
able battery system, high quality systems are available for this model. White's
rechargeable battery #802-5185 and charger #509-0020 are recommended,
for U.S.A. 110V use. These are sealed sets which offer the durability of spot
welded contacts, and the conveniences of automatic charge, trickle charge, and
maintainenance charge. Please contact your dealer.
Batteries continued ...
(6)
(7)
Description of Controls
The THRESHOLD control turns the TM 808 On and OFF and adjust
the volume of the background hum, or as it is commonly called, the "threshold".
Turning the THRESHOLD control clockwise the power is turned ON and the bat-
teries automatically check on the METER for a few moments. For the TM 808 to
operate properly, battery test must indicate in the upper yellow highlighted area
of the METER. In average temperatures, new batteries will provide
approximately 12 hours of continuous use. In cold climates, battery life
will be reduced. The THRESHOLD control must be adjusted for a slight
background sound or THRESHOLD that is heard continuously during searching.
The THRESHOLD control should be adjusted to give a barely audible
hum. A slightly lower setting is used with headphones, and slightly higher when
used without headphones, particularly when being used in a high noise environ-
ment. A setting in the NORMAL area will usually be appropriate. Generally,
the lower the THRESHOLD can be set while still hearing a slight hum, the
better. The THRESHOLD may fade over changing ground indicating the PUSH
BUTTON on the handle needs to be squeezed and released which will return or
reset the THRESHOLD hum. This resetting may be needed at regular intervals,
unless AUTOMATIC THRESHOLD is on AUTO which automatically maintains
THRESHOLD.
THRESHOLD
ZUMBIDO
( ) )
Description of Controls continued.....
The SIGNAL BALANCE control adjusts the receive signal of the detec-
tor. The NORMAL position works well for most searching situations. This setting
will provide more than adequate performance with little interference from electri-
cal sources. If interference from extreme ground minerals, or electrical sources
(radio, power lines, etc.) cause erratic behavior (extreme fluctuations in the
threshold hum), or produce difficulties in setting the GROUND BALANCE control,
the SIGNAL BALANCE control should be set further toward the (-) setting. If
little interference is experienced and ground balancing can easily be achieved,
the SIGNAL BALANCE control may be set slightly further clockwise toward (+).
However, great caution should be used when increasing beyond NORMAL. If
the detector operates erratically, due to the use of too (+) a setting, the response
from deeper targets will be obscured. Additionally, if the GROUND BALANCE
can not be set correctly, the SIGNAL BALANCE is overloading the detectors re-
ceive signal, and will reduce detection depth. The optimum setting is one which
gives smooth operation allowing deep targets to be heard clearly, and GROUND
BALANCE achieved with a reasonable degree of effort. If the instruments perfor-
mance seems temperamental or unstable, a SIGNAL BALANCE setting slightly
toward (-) should be selected.
(8)
SIGNAL BALANCE
BALANCIA DE SENAL
(9)
Description of Controls continued.....
For the best results, the GROUND BALANCE control needs to be ad-
justed each time the detector is used. The NORMAL setting works well for most
conditions. GROUND BALANCE is adjusted to cancel out or ignore common
mineralization in the ground thus, allowing the deepest available penetration.
A setting clockwise toward (+) is used for higher mineralization and a setting
counterclockwise toward the (-) would be sufficient for low mineralized soils.
The method for adjusting this control will be covered in the section on TUNING.
In a nut shell, when GROUND BALANCE is set properly little or no change in
THRESHOLD hum is noted as the detector is lifted slightly up or down in rela-
tionship to the ground. It should also be noted that the AUTOMATIC THRESH-
OLD control, which will be discussed in the next section, should be set in the
NO-AUTO position while the GROUND BALANCE control is being adjusted. The
GROUND BALANCE control and the SIGNAL BALANCE control work hand in
hand to tune out undesired responses, and provide the deepest possible pen-
etration (detection depth).
GROUND BALANCE
ELIMINADOR DE TIERRA
(10)
Description of Controls continued.....
The AUTOMATIC THRESHOLD control is used to activate (AUTO),
or disable (NO-AUTO), the automated threshold resetting feature. This feature
offers automatic threshold maintenance. When AUTO is used it allows the
threshold hum of the detector to remain smooth or constant regardless of small
changes in the ground mineralization, or upward / downward drift of the electron-
ic signal. When NO-AUTO is used changes in threshold which are normal for
such instruments, require manual resetting (squeezing and releasing the PUSH
BUTTON on the handle).
IMPORTANT: The detector must be kept in motion when using the
AUTO position. Standing still over the target will cause the target signal to fade
away.
In the NO-AUTO position, AUTOMATIC THRESHOLD is not functioning.
Use this position when adjusting the GROUND REJECT control to compensate
for the ground. It can be used as a searching mode if the ground mineralization
does not change rapidly, and there isn't external interference from radio signals
etc. In the NO-AUTO position the detector does not have to be kept in motion
when passing over the target. You can stand over the target without the target
signal fading away. It can be valuable to help pinpoint the center of a deep
target. When using this NO-AUTO position it will be necessary to press and
release the reset button on the end of the handle at regular intervals, to keep the
threshold hum constant and free from upward or downward drift. If the threshold
sound gradually increases or decreases while searching, press and release the
button to return the detector to the normal threshold hum. This requires skill and
experience, most users should operate in AUTO until some field experience is
gained.
AUTOMATIC THRESHOLD
AUTO
NO AUTO
ZUMBIDO DE AUTOAJUSTO
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