Lorenz PULSE 5 User manual

ORENZ
PULSE 5
23
The LORENZ PULSE 5 is one of the newest
developements in the field of Pulse-Induction Metal
Detectors. It is probably the most sensitive and
stayable metal detecting device of it's kind presently
available. The LORENZ PULSE 5 is the result of many
years of research and developement. A lot of efforts
have been put into making this new product and
especially in the new metal classification facility
offered with the LORENZ PULSE 5.
The Pulse - Induction principle is specially suitable
for searching at depth. The performance of this
electronic device is unaffected by salt water, most
types of soil or temperature changes. The LORENZ
PULSE 5 is therefore a reliable tool to locate metal
objects at great depths even under the worst
environmental conditions.
The LORENZ PULSE 5 is a high quality specialist
Detector and it is designed to be used with both,
small or large coils. Large coils offer extreme depth
capabilities for big metal objects because of the
strong and deep going magnetic field produced.
Small coils are preferably used while searching for
small objects like single coins or Gold nuggets.
This model offers a great range on non-ferrous
metal objects in general. A very simple operation
is guaranteed by four controls of which only one
reset button will be necessary to operate during
work. At the same time this detector model offers
a number of features which are new for a Pulse-
Induction Metal Detector. Quality electronics and
very special designed electronic - circuitry produce
benefits in terms of easy of use as well as sensitivity.
The LORENZ PULSE 5 gives a visual indication on
the meter for every metal being located. This
conductivity meter reading helps to classify metal
objects. The target classification circuitry is only
weakly affected by the size of a metal object and
therefore identifies small coins as well as large
pieces of metal. The Detector also emits an audible
sound by way of either a speaker or headphones.
Detection depths achieved (in air tests) are almost
the same in the ground and therefore considerably
higher than those possible with standard Pulse-
Induction or Sinewave VLF - TR Detectors.
The LORENZ PULSE 4 & 5 Metal Detectors are
recognised as representing the highest quality and
newest developements in professional metal
detecting equipment.
We as a manufacturing firm always try to keep the
highest standard on our products, therefore
alternations of the design, specifications as well as
the availability subject to change without notice.
1. Safety information
For reasons of safety it is advisible to read this
operating manual first before turning the Lorenz
Pulse 5 on. Special attention should be paid to the
following notes.
Check out, if the plug-in type recharger supplied
with the Lorenz Pulse 5 fits with the AC mains of
your country. The AC plug of the recharger is inter-
changeable and therefore can be used at any
countries mains. See chapter 7 for more detailed
information. The supplied recharger will work at
AC voltages of 90 V-264 V (see lable).
Damaged connecting cables or searchcoils should
no longer be used, because of possible electrical
shock.
To avoid short circuits, wrong polarity or electrical
shock only spareparts and accessories offered by the
manufacturer of the LORENZ PULSE 5 should be
used.
When digging for metal objects war material could
also be found. Precautions should be taken in advance
especially when big objects have been located.
Special kinds of mines could be triggered by the
strong magnetic field produced by the searchcoil.
Please understand that we as the manufacturer of
the LORENZ PULSE 5 can't be made liable for any
kind of damage caused by or in conjunction with our
products.
Design and specifications subject to change without
notice!

ORENZ
PULSE 5
24
The LORENZ PULSE 5 is based on the Pulse-Induction
principle. Short and intensive magnetic pulses are
emited by means of a searchcoil first. Those magnetic
pulses produce eddy currents in conducting materials
like metal objects for example. Said eddy currents
will be kept in a metal object and will die away after
the magnetic pulse emited by the said searchcoil has
turned off. This is the reason why it is possible to
detect those eddy currents during the time delayed
receiving phase by means of the same searchcoil
which now acts as a receiving coil. A rather compli-
cated electronic circuitry is necessary to detect those
tiny voltage changes and has to seperate that particular
signal from interferences also received. The signal
has to be amplified to drive a voltage controlled
oscillator (VCO), which emits an audible signal either
by headphones or built-in loudspeaker when a metal
is in the near of the field of the searchcoil.
Eddy currents produced in a metal object by means
of a pulsed primary field, will die away differently
depending on the conductivity of the metal object.
The classification circuit therefore gives a visual
conductivity meter reading for every metal being
detected. This gives further information on the pro-
bable kind of metal being located as well as the audio
sound emited, which makes it easy to predetermine
the exact place and the size of the buried metal object.
2.1. Advantages
The Pulse-Induction principle has got the advantage
of using large diameter coils and high transmitting
power. This is especially necessary when searching
at depth. Frame mounted cable coils of different
size and shape can be connected to the LORENZ
PULSE 5 without any adjustments.
A special adaption circuit has been added to the
Detector to suit with different coils automatically.
This ensures extreme depth capabilities with any
coil connected. When enlarging the searchcoil
diameter the sensitivity to bigger objects will also
rise. At the same time smaller objects will be
located less sensitive. This is particularly desirable
when locating large objects while ignoring small
bits. Large coils offer depth ranges of up to 8m
(26ft). Those depth capabilities for both ferrous
and non-ferrous metal objects can only be achieved
with the Pulse-Induction principle. Other systems
suffer from ground effects which reduce the depth
range in the ground. The LORENZ PULSE 5 will be
able to locate objects at same depths either in the
ground or in ”air tests”. The high sensitivity of the
LORENZ PULSE 5 to non-ferrous metal objects like
gold, silver and copper together with the new
target classification facility make this Detector an
outstandig device for many different locating pur-
poses.
The LORENZ PULSE 5 was developed to provide a
number of features including high sensitivity and
stability together with easy operation. The amount
of controls was therefore reduced and a calibration
of the Detector to our factory settings was also
made to guarantee best results in the field:
lhighly sensitive to all kinds of metal
lstayable operation on mineralized ground or salt water
lreliable / simple operation
lexact pinpointing with large coils
lvery easy and effective detection of large areas
lrugged mechanical construction
la variety of searchcoils are avaiable for different
detection purposes
lautomatic adaption of different coil sizes to the
electronics
lsmall unwanted metal objects can either be identified
or eliminated
lfast audio response speed with voltage controlled
oscillator (VCO)
llogarithmic audio response for easy pinpointing
lbattery check with meter and light
lcalibrated static ( non-motion ) target classification with
conductivity meter reading
lprecisely adjustable Audio-threshold
lstable static response (acoustical and visual)
lwaterproof searchcoils
linterchangeable built-in rechargeable NiMh-Battery pack
lFast charge electronics with interchangeable AC-plug
for worldwide operation
lfrequency control for interference elimination
lautomatic push-button retuning facility
ldifferent Delay settings to eliminate small objects or
for easy pinpointing
lpossible detection depths of up to 8m (26 ft)
loptimal performance for the detection of small objects
like coins or other non-ferrous objects as well as for
bigger objects buried deep.
lsingle or dual coil designs can be used
lAdditional rechargeable NiMh-Battery packs can be
connected
2. Function

ORENZ
PULSE 5
2.2. Applications
The LORENZ PULSE 5 was developed for profess-
ional search and locating applications. A variety
of searchcoils can be connected to this metal
detector. Large areas can be detected effectively
especially with frame coils. Saltwater, most types
of ground or temperature changes don’t affect the
detection range of the LORENZ PULSE 5. It is
possible to eliminate unwanted objects like nails
and foils or to identify them as being small
unwanted objects while searching for bigger and
deeper objects. In conjunction with small coils the
LORENZ PULSE 5 is a great tool when searching
for small objekts like single coins buried up to 20''
inches deep in the ground.
25
Mode control
With this control the LORENZ PULSE 5 can be switched
on and off. At the same time the battery can be
checked and the target classification can be turned
on. It is also possible to choose between three different
sampling delay settings by means of the same control.
Position OFF
The detector is turned off in this position. When
planning to store the LORENZ PULSE 5 please make
sure that no connectors are connected to the rear
panel of the detector to avoid a very slow discharge
of the built-in batteries even when the detector has
been turned off.
Position BATT.
In this position the detector is turned on and the
condition of the built-in battery is displayed on the
meter. The meter should indicate 100 when the battery
is full. The LORENZ PULSE 5 can only be turned on
via the mode switch when a searchcoil is connected
to the coil-socket on the rear panel.
If the LORENZ PULSE 5 is powered by external power
supplies like an additional rechargeable battery con-
nected to the recharger/ext. power socket the meter
will display the condition of the more powerful battery
as both batteries, namely the built-in and the external
battery are discharged in parallel in this case.
Position DISC
In this position the target classification of the LORENZ
PULSE 5 is selected.
Any metal object detected will give a specific number
(0-100) on the meter in this mode. It is derived from
the conductivity of the same object. A certain intensity
of the target signal is necessary for a conductivity
meter reading. A blue discriminator light therefore
indicates that a signal was strong enough to make a
target classification possible. The light turnes on
simultaneously with the meter indication. The meter
indication will be stored as long as the searchcoil is
over the target and immediately turns down to zero
when the searchcoil passes the detected target.
Position 1
Position 1 offers no target classification but an intensity
meter reading which works in parallel with the audio.
The more the searchcoil approaches to the located
metal object the higher the indication on the meter
and the higher the frequency of the audio is.
3. Controls on the front panel

ORENZ
PULSE 5
26
Position 1 is an all metal mode which offers the
highest sensitivity for every kind of metal and all
object sizes. Position 1 and DISC are the same in
sensitivity. In position 1 however no target classification
is possible although the blue discriminator light will
turn on with any detected object.
Position 2
The LORENZ PULSE 5 offers in this position less
sensitivity than in position disc or position 1. Very
small pieces of foil or very small coins will be indicated
less sensitive and some very small objects can even
be eliminated. At the same time mineralized grounds
will be indicated less sensitive.
Iron, copper or silver objects will suffer from a small
loss in sensitivity especially when they are bigger
than a coin. This position is particularly useful when
searching for bigger objects while ignoring difficult
ground conditions or smaller pieces of metal. When
the universal cable coil has got more than three
windings the mode switch must be turned to position
2 or 3 to ensure best results.
Position 3
This position offers less sensitivity than position 2.
Many coins and some very small iron pieces will be
eliminated. Big objects will be indicated with a de-
creased sensitivity. The detector will work extremely
stayable on every ground in this position. This is
particularly useful while searching for large objects
made of copper, bronze or silver at medium depth
on badly mineralized ground or at very trashy areas.
Very strong signals can be located more precisely in
position 2 or 3 than in position 1 or disc.
Note: It is not possible to turn on the LORENZ PULSE
5 without having connected a search-coil to the
electronics controlbox.
AUDIO-threshold control
With the audio-control the tick-rate of the audio can
be changed. The zero-push-button can be hold simul-
taneously while turning the audio-control. The initial
tick-rate can be altered from silent to a low frequency
ticking tone. For most applications this control can be
left in mid-position. In this position the built-in
loudspeaker will give one tick every 1-2 seconds, after
the detector has been retuned with the zero-control.
Note: The audio-threshold control also acts as a
sensitivity control. When it is set to the left the detector
will respond up to 60% less sensitive than at the mid-
position. The detectors sensitivity may also be
increased when using a higher threshold-setting than
the mid-position.
ZERO-pushbutton
The zero-pushbutton is the most important control
as the whole electronics, including the discriminator
and the audio will be retuned when pressing this
control for about 1-3 seconds. During that time no
metal should be in the direct field of the searchcoil.
While turning the detector on, the zero-pushbutton
should be pressed down for at least three seconds
first. During that time the needle of the meter should
be at 0 and the previously tuned tick-rate should be
audible, or silent when the audio control was turned
to the left. With this control the present audio tick-
rate can always be recalled during operation while
pressing it for one second. When changing the se-
archcoil or when switching the mode-switch to diffe-
rent positions the zero-pushbutton has to be pushed
down for about 2-3 seconds to retune the electronics.
FREQ. - frequency control
With this control the preset operation frequency of
the LORENZ PULSE 5 can be altered. This is mainly
necessary when searching near powerlines, which
cause low frequency interferences. The performance
of the detector won’t be affected by changing the
position of this control, but the amount of inter-
ferences can be greatly reduced by doing this.
Meter with discriminator and battery-lights
The meter has got three different functions which
can be selected with the mode-switch.
1. Battery condition
The battery condition will be displayed on the meter
when turning the mode-switch to the batt.-position.
(100 = full, 70 = 1/2 full, 0-20 = battery discharged)
Note: The battery condition can only be checked
with a searchcoil connected.
2. Discriminator / conductivity meter reading
The conductivity of a detected metal object will be
displayed on the meter with a specific number
(0=coin or nugget, 10-20 can, 30-60 iron, 60-100
copper or silver), when the disc-position is selected
with the mode switch.
3. Intensity / signal strength
The signal strength will be displayed on the meter
when turning the mode switch to position 1, 2 or 3.
The signal strength will be indicated by the way of a
meter indication and an audio response from the
speaker or headphones.

ORENZ
PULSE 5
27
Coil-jack
Searchcoils of different size and shape can be
connected to this jack. The searchcoils available
for the LORENZ PULSE 5 have got coded connectors
to adapt the electronics to the coil automatically.
With the same connector the power supply can be
interrupted when disconnecting the coil plug from
the coil-jack. The built-in rechargeable battery
therefore can't be discharged in this case even if
the LORENZ PULSE 5 is turned on. To connect a
coil plug to the electronics make sure that the plug
is fully pushed in the jack and that the sleeve is
fastened by roating it clockwise.
Note: Any connectors should be disconnected
from the rear-panel when planning to store the
LORENZ PULSE 5.
Headphone-jack
The supplied stereo headphones can be connected
to this jack. Any stereo headphones with
1/4 inch (6,35 mm) plugs can be connected to the
LORENZ PULSE 5 without any problems.
The built-in loudspeaker will be automatically
turned off when headphones are connected.
Note: Special Headphone-adaptor plugs have to
be disconnected when using the Loudspeaker.
Loudspeaker
The LORENZ PULSE 5 has got a built-in loudspeaker
on the rear-panel which gives an audible signal
when the searchcoil approaches to a metal object.
The audio frequency will change with the distance
between the searchcoil and target for better
pinpointing. Especially with two persons operation
and large diameter coils the signal from the
loudspeaker is of greater help for both persons.
Charger / Ext. power Jack
To this connector the supplied charger can be
connected in order to recharge the built-in Batteries.
It is also possible to connect additional battery packs
to increase the operation time of the detector to up
to 24 hours. To connect the recharger or an
additional Battery pack simply plug in the connector
and fasten the metal sleeve of the plug clockwise
(see chapter 7 for more detailed information.)
3.2. Connectors on the rear panel
Red battery-indicator-light
This light indicates that the battery is discharged.
During operation this light must be off. The LP 5
has to be turned off when this light comes on.
Blue discriminator-light
This light will always turn on when a conductivity
meter reading will be stored as long as the
searchcoil is in the near of the detected target.
Note: The discriminator-ligth will turn on even in
position 1, 2, 3 although no target classification
is possible in those mode-positions.

ORENZ
PULSE 5
28
Connect the searchcoil-connector to the coil-jack and
fasten the plastic sleeve of the connector by rotating
it clockwise. Set mode-switch at position batt. The
needle of the meter should rest near 100 and the red
battery indicator should be off. If the meter displays
a number lower than 50 or if the red light comes on,
the detector should be turned off and immediately
be recharged with the supplied recharger. The battery
condition should be checked via the meter during
operation in the batt.- mode (see chapter 7).
Now turn the mode-switch to the disc position. The
built-in discriminator is now selected. Set the audio
and freq. control to mid-position and retune the
detector with the zero-control. The searchcoil therefore
has to be hold constantly over the ground and the
zero-control must be pushed for about three seconds,
until the preselected audio ticking sound is audible.
Important note: With every retuning process one
should pay attention that no metal is in the near of
the searchcoil while pressing the zero-pushbutton.
It is therefore necessary to hold the searchcoil far
away from metal objects and the electronics control
box itself.
During operation no metal buckles or shoes should
be worn. The same with keys, coins, rings and
watches. Every metal carried by the operator can
cause false signals, especially when they are near
the searchcoil. Therefore the electronics control box
has to be carried far away from the searchcoil, this
is especially important while searching with the large
frame mounted coils. Never use any metal screws
when building frames for the universal cablecoils.
The loudspeaker will give one ”tick” every 1-2 seconds
after having retuned the detector correctly with the
zero-control. The ”ticking-rate” can be individually
tuned from silent to a low frequency threshold tone
with the audio-control. This preset audio tone will be
recalled every time the zero-push button is operated.
As the LORENZ PULSE 5 offers it's highest sensitivity
with correctly tuned electronics, one should check
the threshold tone from time to time during operation.
A threshold tone with a ”ticking-rate” will give the
operator the information that the detector works with
it's highest sensitivity.
Especially for target classification purposes the
electronics need to be tuned for best results (see
chapter 5).
The detector is now ready to use and will indicate a
metal object immediately with an audio sound emitted
by the way of loudspeaker or headphones. The audio
frequency will rapidly rise and attains it's highest
frequency when the searchcoil is directly over the
target. The center of the searchcoil is the part with
the highest sensitivity. Even in the direct near of the
target frequency changes make pinpointing possible.
The detector works with it's highest sensitivity in
position Disc and 1. when changing the searchcoil or
when selecting a different position with the mode
control, the electronics need always to be retuned
via the zero-control. When lowering the searchcoil
to the ground especially in position disc and 1 an
audio sound may appear, which can be cancelled by
pressing the zero-pushbutton again. The distance
between the searchcoil and the ground has to be
kept at a constant height when searching after having
done this.
Large diameter coils like the frame mounted cablecoils
should be hold at heights of 4”-24” inches
(10-60 cm) over the ground to ignore magnetic
mineralized ground. Those coils should be moved
slowly without any jerky movements, parallel to the
ground and at constant height.
When mineralized ground conditions or very strong
signals are expected it may be advisible to select a
higher delay setting with the mode control at position
2 or 3.
In position 3 and especially while using large Diameter
frame coils the sensitivity to very small objects
significantly decreases. This is in many cases
desireable. The simplest way to ignore small metal
objekts is to increase the distance between the
searchcoil and the ground. Simply raise the loop and
it will still be possible to locate those deeper bigger
targets. In position disc the target-conductivity can
be measured (see chapter 5).
Note: The LORENZ PULSE 5 metaldetector has to be
retuned with the zero control every time the mode
control has been switched to a different position, a
different coil has been connected or the detector has
been turned on again. Therefore the zero-control
has to be pushed for about three seconds. During
operation only very few threshold corrections are
necessary.
In position 2 and 3 the LORENZ PULSE 5 works with
less sensitivity. Position 1 and disc offer the greatest
sensitivity especially for very small non-ferrous metal
objects like coins and nuggets for example. In position
1, 2, 3 no target-classification is possible, but an
intensity meter indication which displays the signal
strength in parallel to the audio sound.
4. Operating procedures I

ORENZ
PULSE 5
29
5. Operating Procedures II (Target Classification)
This chapter is a kind of summary how to proceed
with the LORENZ PULSE 5, when locating metal,
while using target classification, intensity meter
reading and the audio.
It is therefore possible to predertermine the exact
position, the detection depth as well as the kind
of metal located, without digging it out.
A specially developed electronic circuit makes
conductivity meter readings possible which are
directly displayed on a meterscale (0-100). Those
conductivity readings are only known from TR-
Machines but not from metal detectors based on
the pulse induction principle.
Please proceed as described in chapter 4 and
follow those additional instructions listed below.
Two person operation is necessary when using
frame mounted coils. The coil has to be hold with
two adjustable carrying straps at a constant height
of about 8” inches (20 cm) over the ground. The
search mode can now be selected with the mode-
control. The following described metal classification
facility can be selected in position disc. Before
starting to search it is advisible to adjust the
threshold of the audio.
For most detection purposes the audio and freq.
control can be put to the marked mid-position.
When having done this it is important to retune
the electronics with the zero-control. Proceed as
described in chapter 4 and hold the searchcoil or
frame over the ground while pressing the zero-
pushbutton for about 3 seconds.
When lowering the searchcoil to the ground an
increasing ticking-rate of the audio can be audible
in some cases.
This can either be generated by a metal object or
mineralized ground. When expecting mineralized
grounds the searchcoil can simply be raised again,
4-20” inches (10-50 cm) depending on the coil or
the LORENZ PULSE 5 can simply be tuned to the
ground conditions while holding the coil at a
constant height and pressing the zero-control for
a second. Pay special attention to metal objects in
the near of the searchcoil which may cause false
signals and therefore a false retuning process.
Note: It is always advisible to carry the detector
with the supplied leather bag as far away from
the searchcoil as possible. This is absolutely
necessary to avoid false signals caused by metal
parts of the electronics control-box.
The searchcoil should be held at a constant height
while searching. In many cases it is advisible to
search in a systematically manner with a certain
grid which can be marked on the ground for
example.
The small 10” inch (26 cm) diameter searchcoil
can be supplied with a telescopic pole which is
held at constant height in parallel to the ground.
It is moved from side to side with overlapping
tracks to detect even the smallest coins which can
sometimes only be detected in the center of the
searchcoil as this is the most sensitive part.
Although the response speed of the LORENZ PULSE
5 is very fast, the search speed should not exceed
80” inches (2 m) per second.
When a metal object is located try to find the place
with the strongest signal, that means highest
indication on the meter in position 1, 2, 3 and
highest audio frequency. Size, shape and depth
informations can be derived from the audio sound.
Small objects like single coins will be indicated
with a short and intensive signal when a 10” inches
(26 cm) coil is used.
Coins and nails and very small pieces of metal will
cause two indications when passing them with a
frame mounted searchcoil (1 m x 1m) for example.
This is mainly because those small objects are out
of the range of the large coils and therefore will
only be indicated at the edges of the frame
mounted cablecoils and only when they are very
closed to it. Large metal objects will give an
extensive signal, and therefore can easily be
identified.
Deeply buried metal objects will generate a weak
and slowly increasing audio sound and intensity
meter reading, objects which are closed to the
surface can be identified by the strong and fast
increasing signal.
Large objects will cause a signal with a long
duration especially when located with large frame
mounted cable coils. A metalbox can give a signal
up to 230” inches (6 m) of duration when using a
80” x 80” inches (2 m x 2 m) coil. It is therefore
necessary to find the exact location of a buried
object. This is achieved by moving the coil from
different directions slowly towards the strongest
indication. In many cases it is of great help to use
an additional smaller coil when pinpointing a
target. The center of the searchcoil is always the
most sensitive part.

ËË ËË ËË ËË ËË ËË
ORENZ
PULSE 5
30
5.1. Target classification
In order to get further information from the buried
metal object the target classification of the LORENZ
PULSE 5 can be used. This target classification
feature offered with the LORENZ PULSE 5 is based
on the pulse-induction principle. It is static,
therefore no motion is necessary for a meter
reading. This is especially of great advantage when
identifying deeply buried metal objects with the
highest sensitivity possible. The calibrated target
classification will directly display the conductivity
on the meter. Weak signals which are out of the
range of the target classification can't be identified.
The conductivity meter reading is very precise. It
will be stored as long as the coil is over the target
and will disappear when passing the target with
the coil.
When having located a target proceed as described
in the following steps:
lSwitch the mode-control to position disc.
lHold the searchcoil at constant height over the
ground beside the located target and retune
the electronics to the ground with the zero-
control. Be sure that there is no metal in the
ground or over the searchcoil while doing this.
lSlowly move the searchcoil from the side at
constant height towards the located target. Try
to find the center of the target with the audio.
As soon as a certain intensity of the audible sig-
nal is reached a conductivity meter reading will
be performed automatically by the LORENZ
PULSE 5 this will be indicated with the blue
discriminator light and an indication on the meter.
lCompare the number (0-100) displayed on the
meter with the following table. Therefore the
searchcoil must be held over the target on the
ground in order to store the conductivity value
on the meter. For better accuracy the
conductivity meter reading can be repeated.
Therefore the coil has to be raised in the air
until the blue light is off.
Afterwards the coil can be lowered to the ground
towards the target until another meter reading
is performed by the LORENZ PULSE 5.
Note: A conductivity meter reading can only be
performed when the mode-control is in disc-
position, when the blue discriminator light comes
on and an indication can be read on the meter.
The meter indication can also be locked near 0
when very small coins or gold nuggets are
indicated. In pos. batt, 1, 2, 3 however no target
classification via the meter is possible although
the discriminator light will always come on in
these position.
Signal intensity
small object at the surface large objekt buried deep medium size objekt

ORENZ
PULSE 5
31
Especially when expecting very strong signals and
mineralized grounds it is often advisible to retune
the detector in the ”air”. Afterwards the coil can
be lowered to the target from the top. This will
help to ignore magnetic soils, because the coil is
at least 8” inches (20cm) above the ground and
therefore out of the range of the ground.
This will increase the perfomance and accuracy of
the LORENZ PULSE 5 and makes it easier to locate
and identify those targets.
When expecting very deep targets it will sometimes
not be possible to perform a meter reading because
the meter indication is always about 30-50 % less
sensitive than the audio signal from the built-in
speaker or headphones.
Note: Some smaller pieces of bronze may be
indicate with a conductivity meter reading between
50-60 namely the same as some ferrous metal
objects. The LORENZ PULSE 5 does not suffer from
anomalous effects like VLF-TR-sinewave detectors
do. Therefore very big ferrous metal objects will
not cause a higher meter reading than 50-60 in
most cases. If ferrous and non-ferrous metal
objects are simultaneously located by the search-
coil the target classification circuitry will display
the conductivity of the larger metal object on the
meter. The conductivity meter reading may also
lay between the two different kinds of metal.
The target classification of the LORENZ PULSE 5
will work with all available searchcoils. The
universal-searchcoil-cable should not have more
than three windings (turns) for identification
purposes. It is often helpful to start with ”in-air”
tests in order to see how the LORENZ PULSE 5
responds to different metals.
In position disc the audio is necessary to find the
center of the target. The searchcoil therefore has
to be crossed directly over the target in order to
find the point with the strongest signal. Highly
mineralized grounds, electromagnetic interferences
from powerlines or transmitters can course
unaccurate conductivity meter readings (see
chapter 8).
The LORENZ PULSE 5 is able to identify deeply
buried big metal objects and small objects near
the surface with different kinds of searchcoils.
Note: When expecting heavily mineralized grounds
it is necessary to tune the detector with the zero-
button to the ground. Therefore the searchcoil
must be hold at constant height and at least
2” inches over the ground during the time the
zero-button is pressed down and when identifying
objects with the meter reading.
6. Searchcoils/Accessories
Different searchcoils can be connected to the LORENZ
PULSE 5 for special search and location purposes. In
general small searchcoils offer great detection depths
on small metal objects while large searchcoils offer
the highest possible detection depths on big objects.
The possible detection depths also depend on the
kind of metal, the shape of the metal object and
slightly on the type of ground below the searchcoil.
The low sensitivity for small metal pieces in
conjunction with the very high sensitivity for bigger
and deeper targets make the LORENZ PULSE 5
especially useful when using it with large frame
mounted searchcoils. The maximum detection depths
achievable with a 40'' x 40'' inches (1m x 1m) frame
mounted searchcoil are higher than 200'' inches (5m)
and can even be increased to 315'' inches (8M) when
enlarging the searchcoil to 80'' x 80'' inches (2m x
2m). Of course it will no longer be possible to detect
single coins or nails with those large frame mounted
searchcoils. In this chapter the different searchcoils
available with the LORENZ PULSE 5 are described.
(see chapter 11 for detection depths)
Conductivity Possible
meter-reading Metal object
0-10 coin, ring, ringpull, aluminium-
foil, gold-coin
10-20 bronze-coins, silver-coins, nickel
20-30 softdrink-can, small pieces of
iron
30-50 ferrous metal objects, nails
50-60 iron-box, weapons made of iron
60-80 medium sized bronze, copper,
silver-objects
80-100 big bronze, copper, silver,
gold-objects

ORENZ
PULSE 5
32
This searchcoil was mainly developed for the
location of very small metal objects which are
closed to the surface of the ground like coin sized
metal objects for example. The LORENZ PULSE 5
offers it's highest sensitivity in position 1or disc.
Especially when locating very thin foils, nuggets
or other, non ferrous metal objects. The maximum
detection depth is limited at 3 Meters on very large
metal objects.
This searchcoil can be useful while pinpointing
large metal objects which have been located with
a frame mounted searchcoil before. Deeply buried
metal objects can be out of the range of the small
10” inch (26 cm) searchcoil and therefore can only
be detected with frame mounted searchcoils.
The 10” inch (26 cm) searchcoil is waterproof and
therefore can be used in saltwater for example.
Single coins can be detected at 30-50 cm even in
different types of ground or conducting saltwater.
This searchcoil can be operate by a single person
with the S-rod-handle. It offers extreme depths
ranges on both single coins or bigger objects
buried up to 150” inches (3,8 m) deep in the
ground. Depth ranges of more than 40” inches
(1 m) for a metal object of the size of a soft drink
can (0,33 l) or up to 20” inches (50 cm) on a
single coin with less than 1” inch (2,5 cm) diameter
make this coil interesting for a lot of different
search and locating purposes. Those extreme depth
ranges on medium sized and bigger metal objects
make frame mounted searchcoils unnecessary in
some cases. Small items can be eliminated by
increasing the distance between the coil and the
ground or while selecting a different Delay Mode.
This 45cm coil covers more ground than a 10”
inches coil does and therefore makes very effective
searching possible.
Those small objects can be easily identified by
the way of the target classification. Coins with
a diameter of less than 0,4” inch (10 mm) should
rather be detected with the smaller 10” inches
searchcoil.
10” inches (26 cm) searchcoil with
telescopic pole
14” inches (35 cm) searchcoil with
telescopic pole
This highly sensitive searchcoil has extreme depth
capabilities on single coins and medium sized
objects.
A telescopic pole with armrest (accessory) is
necessary for the small searchcoils (10”,14”,18”).
14”inches (35 cm) double d-
searchcoil with telescopic pole
Separate transmitting and receiving windings
offer more stayable operation on soils with high
contents of ironoxides (minerals). Pinpointing small
metal pieces is very easy with the double d-
searchcoil, which can be used for most search
applications.
18”inches (45 cm) Deep Scan
Searchcoil with telescopic pole

ORENZ
PULSE 5
This extremely lightweight and easy to transport
universal cable coil offers a variety of different
searchcoils for different search applications. The
cable coil has to be fixed with tape on a frame
which can be made of inexpensive PVC-tubes for
example. The following searchcoil configurations
are mainly useful for the location of metal objects
with a surface of at least 6 cm2or fist sized metal
objects for example. Small metal pieces like single
coins or nails will be indicated with very poor
sensitivity or will even be eliminated in some cases
because they are out of the range of those frame
coils. It is very easy to cover a large area with
frame coils in a short time. This is especially useful
when looking for bigger deeply buried metal objects
while ignoring those smaller metal pieces at the
surface of the ground.
The following frame mounted searchcoils must be
carried by two persons with adjustable carrying-
straps. The searchcoil must be hold in parallel to
the ground at a distance of 10-60 cm. The
electronics control box should always be carried
far away from the field of the searchcoil. It is also
necessary not to wear any clothes with metal when
operating the LORENZ PULSE 5 with large frame
coils to avoid false signals.
33
The universal cable coil has to be arranged to a 2
winding searchcoil and has to be fixed on a 1m x
1m PVC-frame for example.
Searching with the 1m x 1m frame coil is mainly
advisible when looking for fist sized or bigger metal
objects buried deep while ignoring small coins,
nails and pieces of foil at the surface of the ground.
The possible detection depths (see chapter 11)
with this particular frame coil are very high
compared with standard sinewave VLF-TR-
detectors. This is one of the reasons why this
particular searchcoil is used for most professional
applications.
The detection depths are even higher than those
achievable with magnetometers which are more
expensive and can only detect ferrous metal
objects.
The maximum detection depth is limited at 5,50m
with this particular searchcoil.
Because of the size of the coil, small metal
fragments will be ignored. Bigger nails can be
identified with the target-ID. Most of the nails and
other metal fragments can be easily eliminated by
increasing the distance between the searchcoil and
the ground. Even at distances of 50 cm there will
only be neglectable detection depth losses when
locating large metal objects. This frame coil has
to be carried by two persons with the supplied
carrying straps.
The high depth range of the 1m x 1m frame coil
is achieved with it's intense and therefore deep
going magnetic field transmitted. The detection
depths listed in chapter 11 have been recorded
with different delay settings namely mode-switch
at position DISC, 1, 2, 3 and preset audio mid-
position with zero retuned electronics. In many
cases detection depths in wet, conducting ground
are even higher than listed in chapter 11.
Universal cable coil
0,7m x 0,7m universal cable coils
3 windings
The universal cable coil has to be arranged to a 3
winding searchcoil and has to be fixed on a 0,7m
x 0,7m frame made of PVC-tubes for example.
Never use any metal screws for the construction
of a frame! This is the smallest frame mounted
searchcoil which offers extreme detection depths
for smaller and medium sized objects.
Metal fragments and some coins will still be indi-
cated. The maximum detection depth is limited at
4,50m. This 0,7m x 0,7m coil receives less interfe-
rences from powerlines or transmitters than larger
1m x 1m or 2m x 2m coils do. (see chapter 8).
1m x 1m universal cable coil
2 windings
This is a very user friendly 1m x 1m frame coil
with the same electrical properties as the universal
cable coil with two windings as described before.
The main advantage of this particular searchcoil
is it's simple assembly, which can be performed
in a few steps. The disassembled coil is easy to
transport and will always be ready for use.
1m x 1m PVC-frame searchcoil

ORENZ
PULSE 5
34
In order to construct a compensated coil the coil
cable has to be laid to the figure of the shape of
an eight (8) first. The coil cable has to be fixed on
a 1m x 2m frame with a centre part which devides
the frame into two 1m x 1m frames. The cable has
to be laid and fixed twice on the center part as
this is the midle of the eight (8). This type of frame
mounted searchcoil is about 30% less sensitive
than a 1m x 1m searchcoil. This is because of the
opposite directions of the transmitted magnetic
pulses. During the receiving phase the two coils
of the eight do also work in opposite. Therefore
magnetic interferences and most ground indications
are substracted from each other and therefore
eliminated.
Interferences from radio transmitters or powerlines
will be absolutely cancelled. Highly mineralized
grounds will be indicated less sensitive than with
a 1m x 1m searchcoil. This compensated 1m x 2m
frame mounted searchcoil is of great advantage
when locating metal objects in urban areas where
interferences are often expected. This type of coil
has a very poor sensitivity for very small metal
objects. Therefore fist sized or bigger objects should
only be located. The minimum surface of a metal
plate should be 10cm x 10cm to ensure best results
when working with this coil.
Although being less sensitive, the compensated
1m x 2m coil offers very good detection depths on
any kind of ground. The maximum detection depth
is limited at 4 m.
Further informations concerning the detection
depths with different coils and mode positions
selected are recorded in chapter 11.
The coil cable is protected inside the tubes and
therefore can be used even under the worst
environmental conditions. Two adjustable carrying
straps are supplied with every frame coil.
1m x 2m universal cable coin
(compensated)
2m x 2m universal cable coil
1 winding (turn)
This is the largest frame mounted searchcoil
available with the LORENZ PULSE 5. The universal
cable coil has to be laid to a single turn on a metal
free PVC-frame and has to be fixed with tape for
example.
This particular searchcoil covers four times as
much ground as a 1m x 1m frame coil does. It
should only be used when searching for metal
objects with a surface of at least 20 cm x 20 cm
pointing towards the coil. Smaller targets will be
located less effectively than with a 1m x 1m frame
for example. This is mainly because it will become
more difficult to pinpoint those smaller objects
with the large coil. The maximum detection depth
is limited at 8 m. This can be achieved when
locating large objects like lost aircrafts or drums
for example. The 2 m x 2 m frame coil can be
carried by two persons without any carrying straps.
This is particularly useful when trying to ignore
medium sized metal objects which are smaller
than a horseshoe for example. Coins and nails will
no longer be detected when doing this. Although
being more sensitive than the 1m x 1m coil, the
2m x 2m coil should only be used when expecting
targets with a minimum surface of 20cm x 20 cm.
The large 2m x 2m coil acts as a large antenna for
mediumwave transmitters. Therefore smaller
frames like the 1m x 1m coil for example will be
of better choice when working in urban areas.
The next coil described will be less sensitive in
general but won't suffer from electromagnetic
interferences of transmitters, powerlines or the
ground itself.

ORENZ
PULSE 5
35
The LORENZ PULSE 5 metal detector is supplied with
a built-in NiMh-rechargeable battery which will power
the electronics 8-12 hours depending on the coil
connected and the environmental temperature con-
ditions. The usage time will be 10 hours under average
conditions.
A discharged battery should be recharged with the
supplied charger. Therefore the plug of the recharger
has to be connected to the charger/ext. power socket
on the rear panel of the LORENZ PULSE 5 and the
AC-plug of the charger into mains. The fast charge
electronics will automatically change to a trickel
charge mode when the battery is full. The built-in
battery is therefore protected and can't be overchar-
ged. The different charge modes are indicated via
the red light on the recharger. A permanent red light
indicates the standard state - rapid charge. A slowly
flashing red light indicates charging finished - trickel
charge. A fast flashing red light will only come on
when the temperature of the battery is out of range
or in any other fault condition.
The maximum recharge time is limited at 2,5 hours
on an empty battery. NiMh-batteries suffer from a
slow self discharge at higher temperatures. During
one month time the capacity of a battery can decrease
to 80% for example. The battery power can be simply
doubled by connecting an additional rechargeable
battery pack to the recharger/ext. power socket on
the rear panel. The usage time can be extended to
up to 24 hours. Both batteries, namely the built-in
and the external one work in parallel, therefore even
if one of the two batteries is empty it is still possible
to operate the detector.
Note: Never forget to turn off the detector immediately
after the red battery light on the meter comes on.
When disconnecting the recharger from the mains
it is important to disconnect the plug from the rear
panel of the LORENZ PULSE 5 (recharger/ext.
power) as well as avoiding a slow discharge of the
batteries. The supplied recharger has got a wide
range of input voltages in order to fit with any
country mains. In conjunction with the
interchangeable AC-plugs it is designed for
worldwide operation.
Four different detachable AC-plugs are available
at the manufacturer of the LORENZ PULSE 5:
USA, UK, Europe, Australia.
Note: Only spare parts and accessories available
from the manufacturer of the LORENZ PULSE 5
should be used.
To guarantee a long lifetime of the encased NiMh
battery pack it should never be completely
discharged, as this can result in a loss of capacity
or complete damage of the battery.
Note: Do never forget to turn off the LORENZ
PULSE 5 when it is not in use or when planing to
store it. Disconnect all plugs from the rear panel
when transporting it as it can’t be turned on
inadvertently when the coil connector is left open.
The LORENZ PULSE 5 has to be turned off when
the red battery light comes on!
The capacity of the built-in battery can always be
checked when turning the mode-switch to the batt
position. It will be displayed on the meter. If it is
lower than 20 the battery is nearly empty and less
than 1 hour usage time can be expected. When
disregarding the red battery light the battery can
be completely discharged. Resulting damages of
the battery can not be covered by warranty.
The battery can only be checked via the meter or
light when a coil is connected to the coil-socket of
the LORENZ PULSE 5. The encased battery pack
can be recharged at any time no matter if the
battery pack is already full or empty. It is important
to discharge the battery until the red light comes
on every fifth time the LP5 has been in use before
the detector is recharged again.
7. Battery / Recharger
The following safety information must be read
before using the rapid-charger supplied with every
LORENZ PULSE 5 detector:
lplease read the user instructions before using
the charger
lfor indoor use only (protect against moisture)
lnever try to charge ordinary non-rechargeable
batteries!
ldo only use to recharge 12V/3 Ah battery-packs
l(available from manufacturer of the LP 5 only)
lrechargeable batteries supplied with the
LORENZ PULSE 5 contain chemical substances
they are subject to special waste disposal.
Rapid-charger for LP5 in general
operating temperature: 0°C - +40°C
storage temperature: - 40°C - +70°C
input data: UE = 100-240V ±10%, 50-60Hz, 700mA

ORENZ
PULSE 5
NiMh batteries have got very good discharge
characteristics in conjunction with high capacity
and low weight. The lifetime of the encased battery
pack is limited to five years. After this period of
time the capacity of the battery will constantly
decrease, which makes an exchange necessary.
In order to exchange the encased battery pack the
electronics control box has to be opened first. This
can be simply performed with an ordinary
screwdriver by removing the four grey plastic parts
of the top of the control housing and the screws
below. Gently remove the top of the control box
afterwards. Simply disconnect the battery connector
36
How to exchange the built-in
battery-pack
from the printed circuit board, by pulling it gently.
When exchanging the battery make sure that only
the original 12V / 3 Ah battery pack available as
spare part only from the manufacturing firm of
the LORENZ PULSE 5 is connected to the
electronics. Please make sure that the connector
can only be pushed into the socket in one direction.
Note: Please make sure that the connector of the
battery pack is always kept clean and that no
conducting material is in the near of the connector
when storing it. In the case of a short circuit the
built-in fuse will protect the battery from heating
up or coming on fire. It is always necessary to
take special precautious of avoiding short circuits
when handling with battery-packs.
The LORENZ PULSE 5 was developed to ignore
most magnetic interferences received by the
searchcoil. In some cases however there are very
strong interferences produced by powerlines,
railroad tracks or transmitters which are very
difficult to suppress with electronic circuits as they
are many times more intense than a signal received
from a metal object for example. Several filter
circuits have been added to the LORENZ PULSE 5
to suppress most low frequency inductions.
Especially in the near of powerlines interferences
can be noticed with false signals or rhythmic signals
which cause indications on the meter, the disc-
light or an audio response.
In urban areas, near transmitters or when other
metal detectors are working close to the LORENZ
PULSE 5, those kind of interferences could also be
expected. In general interferences will increase
with the size of the searchcoil. Interferences
received with large coils are often accepted in
respect of the high sensitivity still offered with
those particular coils. In some cases interferences
can be so intensive that it is simply impossible to
work with the LORENZ PULSE5. Therefore it will
sometimes be necessary to change the frequency
with the freq.-control on the front-panel of the
LORENZ PULSE 5 to suppress some interferences.
The freq.-control can therefore be turned to the
left or right, until the audio sound is clear and
without any rhythmic pulses. The sensitivity or the
target classification won't be affected when doing
this.
If it is not possible to reduce or eliminate
interferences by changing the frequency of the
8. Interference
LORENZ PULSE 5 it is either possible to put the
audio-control to a lower setting until the ”noise”
disappears or to change the size or kind of the
searchcoil. When setting the audio-control to the
left the sensitivity of the LORENZ PULSE 5 will be
reduced, but the amount of false signals will also
be greatly reduced. When connecting a smaller
searchcoil the amount of interferences can also
be reduced. The compensated 1m x 2m frame
mounted searchcoil does not suffer from any kind
of interferences, even the intensity of ground
indications is greatly reduced at the expense of
poor sensitivity for smaller metal objects. Therefore
the compensated 1m x 2m coil should only be
used while searching for metal objects which have
a surface bigger than
10cm x 10 cm. The 1m x 2m coil will always
guarantee a very stayable operation of the LORENZ
PULSE 5 even under the worst environmental
conditions like temperature changes, mineralized
grounds or magnetic disturbances.
Interferences caused by transmitters and
powerlines can't be reduced by changing the search
mode with the mode-switch.
It is only possible to reduce the amount of ground
indications and the sensitivity to small metal objects
when turning the mode-control to position 2 or 3
(see chapter 3).
Note: Low interferences with clear audio response
and correctly tuned (zeroed) electronics is
absolutely necessary to make exact target classi-
fications possible. The LORENZ PULSE 5 therefore
has to be tuned and the right coil has to be chosen
first before starting to identify metal objects.
l

ORENZ
PULSE 5
The electronic unit of the LORENZ PULSE 5 does
not suffer from any drift in general. That means
only in case of extreme temperature changes the
electronics have to be retuned with the zero-
control. The same should be done after very first
five minutes of operation since many components
inside the LORENZ PULSE 5 control box need to
warm up to their working temperature.
Ground signals which are mainly derived from
magnetic iron oxides will be indicated with an
increasing audio response when lowering the
searchcoil to the ground although no metal is
37
below the searchcoil. This kind of ground indication
can be simply eliminated by simultaneously holding
the searchcoil at constant height over the ground
and pressing the zero-push button for a second.
(see chapter 4, 5 for further details)
As long as the coil is hold at the same height during
searching there will be no loss in sensitivity after
having retuned the detector to the ground. When
expecting highly mineralized ground it is always
advisible to hold the searchcoil at a distance of at
least 10-30 cm from the ground depending on the
size of searchcoil connected.
The LP 5 is practically service free. The electronics control
box and the other components should always be kept
clean and dry. This is particularly important for the plugs
and sockets, which should never be stored when being
wet. The electronics control box is not waterproof and
should therefore not be exposed to rain or extreme
temperature changes. All searchcoils available for the
LP 5 are waterproof. When extension cables are in use
please make sure that the connectors are securely
fastened so that no water runs into the plugs.
All of the components can be cleaned from dust with
a soft cloth if necessary. In case of false signals or
any kind of unstable operation please check the
capacity of the battery first. Do switch off the LP 5
when the red battery light comes on. Disregarding
this can damage the built-in battery. Damages causes
by deep discharged batteries are not covered by
warranty!
10. maintenance/service
Service
The LORENZ PULSE 5 is ruggedly designed. All
necessary electronic components are placed on two
printed circuit boards. The main circuit board is
covered with a special plastic to protect it from
temperature changes and humidity.
Different components like the front or rear panel,
circuit boards, battery, connectors can be easily
exchanged if necessary.
In case of any false functions or problems occurring
with your LORENZ PULSE 5 detector do contact your
dealer where you purchased your detector or directly
contact us at:
(Adress see last page)
9. LORENZ PULSE 5 standard equipment
The LORENZ PULSE 5 detecting system is supplied with the following standard kit:
lPlastic carrying case with foam padding
lLORENZ PULSE 5 electronics control box
lLeatherbag with adjustable shoulder and belt strap
for LORENZ PULSE 5
lRapid charger with wide range AC-input (90-240 V)
lDetachable AC-plug for rapid charger (Euro,
UK, USA, Australia available)
lOperating manual (English and German Version)
lStereo headphones with 6,35 mm plug.

10”in 18”in 27”in coil 40”in coil 80”in coil 40” x 80”in coil
coil coil 3 turns 2 turns 1 turn compensated 8
Goldnugget
Diameter: 5mm 7,8”in 9”in X X X X
Goldcoin
Diameter: 20 mm 15”in 18”in 17”in X X X
Silvercoin
Diameter: 13 mm 11”in 12”in X X X X
Silvercoin
Diameter: 25 mm 17”in 21”in 22”in X X X
German coin 1DM
Diameter: 24 mm 16”in 20”in 18”in X X X
Brass sheet
4” x 4”inches 30”in 37”in 49”in 55”in 59”in 40”in
Brass sheet
8” x 8”inches 35”in 47”in 65”in 71”in 90”in 51”in
Softdrink can
0,33 l 35”in 50”in 55”in 60”in 67”in 45”in
Iron box
12”x7”x6”inches 51”in 71”in 87”in 102”in 122”in 70”in
Fuel tank
20 l 59”in 94”in 106”in 122”in 145”in 78”in
Iron plate
20” x 20”inches 63”in 86”in 98”in 114”in 142”in 79”in
max. range 118”in 150”in 177”in 217”in 315”in 157”in
Detection depths recorded in medium air; mode-switch at position 1or disc
Used Searchcoil
Metal object
ORENZ
PULSE 5
38
11. Detection depths I

ORENZ
PULSE 5
39
detection depths II
10”in 27”in coil 40”in coil 80”in coil 40”x80”in coil
coil 3 turns 2 turns 1 turn compensated 8
Goldnugget
Diameter: 5mm X X X X X
Goldcoin
Diameter: 20 mm 9”in X X X X
Silvercoin
Diameter: 13 mm 6.7”in X X X X
Silvercoin
Diameter: 25 mm 12”in 12”in X X X
German coin 1DM
Diameter: 24 mm 8”in X X X X
Brass sheet
4” x 4”inches 28”in 43”in 53”in 51”in 35”in
Brass sheet
8” x 8”inches 35”in 57”in 67”in 79”in 47”in
Softdrink can
0,33 l 27”in 43”in 45”in 47”in 33”in
Iron box
12”x7”x6”inches 50”in 86”in 102”in 106”in 63”in
Fuel tank
20 l 53”in 98”in 106”in 122”in 75”in
Iron plate
20” x 20”inches 57”in 94”in 114”in 118”in 75”in
max. range 98”in 157”in 188”in 275”in 141”in
Detection depths recorded in medium air; mode-switch at position 2
Used Searchcoil
Metal object

ORENZ
PULSE 5
40
detection depths III
11. Specifications LORENZ PULSE 5
dimensions
electronic control box in leather case:
9” x 67” x 27,5” (230 x 170 x 70 mm)
carrying case with standard kit and LP 5 inside:
15,7” x 12 ” x 6,5” (400 x 300 x 165 mm)
1m x 1m pvc-frame coil (collapsed):
433” x 59” x 59” (1100 x 150 x 150 mm)
10” in (26 cm) searchcoil with extended S-rod:
length 53” inches (1350 mm)
10” in (26 cm) searchcoil with collapsed S-rod:
length 41” inches (1050 mm)
weight
LP 5 electronic control box in leather case:
2300 g
carrying case with LP 5 and standard kit:
5200 g
universal coil cable:
380 g
1m x 1m pvc-frame coil:
2300 g
10”in 27”in coil 40”in coil 80”in coil 40”x80”in coil
coil 3 turns 2 turns 1 turn compensated 8
Goldnugget
Diameter: 5mm X X X X X
Goldcoin
Diameter: 20 mm X X X X X
Silvercoin
Diameter: 13 mm X X X X X
Silvercoin
Diameter: 25 mm 7”in X X X X
German coin 1DM
Diameter: 24 mm X X X X X
Brass sheet
4” x 4”inches 24”in 40”in 47”in 43”in 31”in
Brass sheet
8” x 8”inches 31”in 51”in 59”in 67”in 43”in
Softdrink can
0,33 l 14”in 24”in 20”in X 24”in
Iron box
12”x7”x6”inches 41”in 75”in 90”in 98”in 59”in
Fuel tank
20 l 45”in 87”in 98”in 114”in 69”in
Iron plate
20” x 20”inches 47”in 87”in 102”in 114”in 67”in
max. range 63”in 118”in 150”in 197”in 102”in
Detection depths recorded in medium air; mode-switch at position 3
Used Searchcoil
Metal object

ORENZ
PULSE 5
41
LORENZ DETECTING SYSTEMS
Rupsteinstraße 2
30625 Hannover
Germany
Phone: [phone]
Fax: [phone]
eMail: [e-mail]
Internet: www.metaldetectors.de
electrical data:
search-frequency with large / small searchcoils
connected:
700 / 1300 Hz
audio target response freq. voltage controlled
oscillator:
0 - 13000 Hz
power source:
built-in 12V / 3 Ah NiMh battery
usage time:
approx. 8-12 hours depending on temperature and
coil connected
batt.charger:
rapid charger with interchangeable ac-plug
96 - 264 V for worldwide operation
recharge time:
max. 2,5 hours on empty battery
operating temperature:
-5°- +55°C
detection depths:
see chapter 11
Searchcoils (interchangeable)
electrostatic insulated (shielded); waterproof
l10” inches (26 cm) searchcoil with S-rod shaft
and armrest
l14” inches (35 cm) searchcoil with S-rod shaft
and armrest
l14” inches (26 cm) double D-searchcoil (for the
detection on mineralized soils)
l18” inches (45 cm) searchcoil with S-rod shaft
and armrest
l1m x 1m pvc-frame searchcoil (Accessory)
luniversal coil cable 8m perimeter (can be used
as 0,7m x 0,7m; 1m x 1m; 2m x 2m;
compensated 1m x 2m frame mounted
searchcoil)
controls
mode-switch:
off; batt-test; discriminator; 1; 2; 3 - delay settings
zero-push button:
automatically retunes the electronics
audio-control:
changes the audio threshold (tick-rate) from silent
to a low frequency audio sound.
freq.-control:
sets the operating frequency of the
LORENZ PULSE 5
connectors
coil- socket:
different searchcoils can be connected to this
connector
charger / ext. power:
the supplied charger or external battery packs can
be connected to this jack.
headphone-jack:
the supplied stereo headphones can be connected
to this jack.
optional accessories
different kinds of searchcoils, extension cables and
additional battery packs are available on
request.The encased rechargeable battery is also
avaiable as sparepart for the LORENZ PULSE 5.
Design and specifications subject to change
without notice!