MD200
EN
OPERATING MANUAL
MAGNETOMETER
TRT-BA-MD200-HS-001-EN
Table of contents
01 Safety ..................................A-1
02 Intended use .............................A-1
03 Scope of delivery and overview ...............A-1
04 Introduction, theory of object detection .........A-2
05 Start-up and application ....................A-3
•The only party responsible for determining measured
results to be valid, drawing conclusions and deriving
actions is the user! The correctness of the results
presented is excluded from any liability or guarantee.
Liability for damages which have been caused by utilising the presented measured results is strictly excluded.
02 Intended use
06 Visual and acoustic object localization ..........A-5
07 Troubleshooting ...........................A-7
08 Cleaning, storage and transport ...............A-8
09 Technical data ............................A-8
The measuring device at hand was built according to
current state-of-the-art technology and fulfils valid
European and national directives. The conformity has been
demonstrated. The corresponding declarations and documents are kept on file by the manufacturer. To keep this
condition and ensure safe operation, as a user, you must
observe the following safety instructions!
01 Safety
We accept no liability for damages caused by nonobservance of this manual or unprofessional handling. Any
warranty claims are voided in such cases!
m Prior to using the MD200, this operating manual
is to be carefully read and observed in every
particular.
For reasons of safety and conformity (CE), any unauthorised
change made to the device construction or components
which are to be used with the measuring device are
prohibited!
The MD200 serves the purpose of detecting concealed
metal (ferromagnetic) objects. The device may only be used
for this intended use while complying with the specified
technical data! In addition the device detects live wires
with 50/60 Hz, visualized by the indication "50 Hz" on the
display. If a live wire is detected while searching an object,
the crossed lines will "disappear" from the "50 Hz" display.
This is to protect the user from health hazards. Moreover, no
live wire is to be damaged.
Attention! The device was not specifically designed for
locating live wires. Under certain conditions it may not be
able to detect these. The 50 Hz function is therefore only
intended for orientation and not the determination of valid
results!
03 Scope of delivery and overview
3.1 Scope of delivery
Consignment consisting of:
MD200 detector
•The MD200 is a solely ferromagnetic metal detector.
Objects made of other metals cannot be detected with
it. Note: You can use a magnet to check whether the
object is ferromagnetic! If the magnet attracts the
object, it is ferromagnetic. If the magnet does not
attract the object, then it is not ferromagnetic!
•Observe the storage and operating conditions!
•Never use the rod of the metal detector for digging!
•Remove all magnetic objects the device might react
to (e.g. steel-toed safety boots). These could affect the
measurement.
Devices with electromagnetic radiation, such as mobile
phones, might also influence a measurement.
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Operating manual – MD 200
EN
MD200 soft carrying case incl. 4 x AA batteries and
operating manual
3.2 Display and operating functions
MD200
MD200
1
2
3
4
5 11
99
CAL
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50 Hz
50 Hz
6
7
8
9
10
3.3 Battery compartment
The battery compartment can easily be opened by use of a
coin or another pointed tool (screw driver, knife).
MD200
99
50 Hz
50 Hz
CAL
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The holder for 4x AA batteries can completely be removed
from the compartment. Hence, the batteries can be changed
unproblematically.
04 Introduction, theory of object detection
The MD200 locates ferromagnetic objects by detecting
their influence on the Earth's magnetic field. The sensor
rod comprises two "Fluxgate" sensors 1 continuously
measuring the Earth's magnetic field at a certain distance
and exact angle to one another. If the Earth's magnetic
field is undisturbed, the flux lines are running parallel
and both sensors measure the same signal. If there is a
ferromagnetic object 2 buried in the ground, this object
influences the Earth's magnetic field and deflects the
flux lines 3. This deflection is more apparent in the lower
Fluxgate sensor than in the upper one, which leads to a
deviation of the electrical signal and can be measured.
12
1
1
sensitivity
2
volume
3
battery status
4
calibration
5
+ key (Up) and Erase function
6
numeric signal strength display
7
display illumination
8
"50 Hz" indication
9
graphic signal strength display
10
menu selection and confirmation key
11
- key (Down) and On/Off function
12
speaker
EN A - 2
Operating manual – MD200
The bigger the object and the closer you are to it, the more
noticeable the deflection.
3
2
3
05 Start-up and application
Menu selection
Described below are the keys and their function.
Switch-on
MD200
99
50 Hz
CAL
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50 Hz
briefly
To switch on the device, briefly press the Down key until the
display switches on.
Menu scrolling
MD200
99
50 Hz
CAL
50 Hz
MD200
99
50 Hz
CAL
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50 Hz
briefly
Actuation of the "confirmation key" activates the selected
submenu. It will be displayed in black inverted.
Menu sensitivity adjustment
MD200
99
50 Hz
CAL
50 Hz
briefly
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or
MD200
99
50 Hz
CAL
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50 Hz
briefly
By briefly pressing the Up or Down key you can
scroll through the menu (the respectively
selected submenu will be edged in bold black).
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Operating manual – MD 200
briefly
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If the menu item "sensitivity" is activated (Sen black
inverted), you can adjust the sensitivity by briefly pressing
the Up or Down key.
Menu sensitivity confirmation
MD200
99
50 Hz
CAL
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50 Hz
briefly
Pressing the "confirmation key" again confirms the
presently set sensitivity. The volume can be adjusted
analogous to the sensitivity!
EN
Menu switching on the illumination
MD200
99
50 Hz
CAL
50 Hz
crossed lines disappear from the "CAL" box in the display.
The present ferromagnetic basic signal is "cut" and the
measuring detectors only react to signals stronger than the
basic signal. With activated CAL menu you can carry out a
calibration any number of times.
Press and hold the "Up key" for approx. 7 s to exit "CAL"
mode again. Three acoustic signals can be perceived and
"CAL" is disabled again.
Switch-off
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briefly
If the menu item "illumination" is activated, you can
switch the illumination on or off by briefly pressing the
"confirmation key".
Menu display rotation
MD200
99
50 Hz
CAL
1. briefly
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press simultaneously
50 Hz
2. briefly
MD200
99
CAL
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50 Hz
50 Hz
3-4 seconds
Pressing the "Down key" for approx. 3-4 seconds switches
the device off.
If no submenu is selected, the display can be rotated by
180° by means of simultaneous actuation of the "Up" and
"Down" keys.
Menu calibration (Erase function)
MD200
99
50 Hz
CAL
3-4 seconds
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50 Hz
Press the "Up key" for approx. 3 to 4 seconds. Two acoustic
signals can be perceived and calibration is activated. The
EN A - 4
Operating manual – MD200
06. Visual and acoustic object localization
Preliminary observations
A successful detection of ferromagnetic metals much
depends on the surroundings and the material of the
object to be located. Accordingly please ensure that you
carry no magnetic objects on your body and that there
are no devices or appliances radiating within the electromagnetic wavelength spectrum in the immediate vicinity.
Safety boots or mobile phones, for instance, can have a
negative effect on the sensors of the MD200.
Also observe, that non-magnetic metal objects such
as beverage cans (aluminium) or crown caps cannot
be detected, for these are generally not made of
ferromagnetic metals.
Measuring procedure
Pick a starting point for the measurement, which preferably
does not feature any ferromagnetic parts in the immediate
vicinity (e.g. fence).
As part of the next working step switch on the MD200, hold
the metal detector in a comfortable position (approx. 20°
to 40° to the surface) and slowly oscillate the measuring
device from side to side (see fig.). If the sound is enabled
(Vol. display), a signal will be audible.
Note: If the maximum signal strength of 99 continues to be illuminated despite the changed
position or reduced sensitivity, you can also press
the CAL button at the MD200 for approx. 3 seconds.
The present ferromagnetic basic signal is "cut" and the
measuring detectors only react to signals stronger than the
basic signal.
In this basic mode you may now pace the test area, observe
the numeric signal strength and possibly the acoustic signal.
If the interval between the acoustic signals grows shorter and
the numeric signal strength increases, you are approaching
a ferromagnetic object.
Listed below are typical objects and their signal curves.
Manhole covers
The rim of the manhole cover causes the highest signal
deflection. The cover's centre can be located by swinging
the metal detector back and forth. The centre is the position
with the smallest deflection.
9999
Then, in the next step, check the sensitivity indication on
the display. Should it not set to maximum mode, adjust the
sensitivity accordingly. If then the numeric signal strength
lights up displaying number 99, the sensitivity is set too
high. Successful object detection cannot be effected, since
the signal of the object to be located is superimposed
by foreign object signals. It is also possible that you are
positioned directly above a ferromagnetic object.
Change the starting position or gradually down-regulate
the sensitivity (Sens. indication) until the numeric signal
strength is displayed with approx. 6 to 12.
47
Signalverlauf
Different object sizes and depths
Generally applicable: Larger objects cause a higher
signal deflection than smaller objects and the closer an
object is to the surface, the stronger will be the resulting
signal deflection.
99
55
Signalverlauf
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Operating manual – MD 200
EN
Point objects in upright position
If the sensitivity of the metal detector is set too high or the
object in the ground very large, the signal deflection will
be at a max over a larger
1 area. Gradually reduce the
sensitivity to detect the position with the absolute
maximum -> this is where the object is located 2
!
Metal pipes
The joints, elbows, sleeves and end fittings will cause the
strongest signal deflection.
99 99
99
1
Signalverlauf
Signalverlauf 30
Live wires
The device recognizes live wires of a certain radiated
field strength. By means of a defined measuring rate the
device during measuring checks, whether the object is a live
wire. This results in a response time of up to one second.
99
This is to prevent permanent 50 Hz alarms under specific
measuring conditions. An insufficient field strength or
2
Signalverlauf
excessive insulation of the live wire may lead to the line not
being detected!
EN A - 6
Operating manual – MD200
07 Troubleshooting
Fault description Potential causes Proposed solution
Device is always at maximum
deflection (99).
Device does not respond to metal
objects.
Device continuously displays "21" as
signal strength.
Sensitivity set too high and/or there is too
much ferromagnetic material nearby.
Strong magnet nearby. Move away from the magnetic source.
Sensors in the device were not activated
correctly during switch-on.
Sensor connectors have come off (device,
even after observing the above points, is still
at maximum deflection and/or loose parts
can be heard when shaking).
Sensors inside the sensor rod are broken /
sensor rod is visibly kinked or broken up.
Other causes than described above.
Metal object is not ferromagnetic.
Sensitivity set too low. Increase the sensitivity.
Other causes than described above. Please contact the manufacturer.
Sensor board is broken. Please contact the manufacturer.
Reduce the sensitivity.
Switch the device off and back on.
If required, carefully remove the upper
half of the housing and check the plug
connections (visual inspection).
Reconnect! If in doubt, please contact the
manufacturer.
Please contact the manufacturer.
The device ONLY reacts to ferromagnetic
objects!
Device does not switch on.
Speaker is not working.
Display remains dark, speaker is
working.
50 / 60 Hz indication does not
respond to live wire.
Battery holder within the battery
compartment has come off and/or battery
charge is too low.
Open the battery compartment and check
the connections. Change the batteries, if
required.
Minimum requirement to activate the
Speaker setting I
speaker is the setting II in the "Vol"
menu.
Speaker defective. Please contact the manufacturer.
Remove the upper half of the housing
Loose plug connection inside the device.
and check the plug connections (visual
inspection). Reconnect.
Display is visibly broken (crack).
Other cause than described above.
Please contact the manufacturer.
Wire is currently not live.
The radiated field of the line is insufficient for
activating the 50 / 60 Hz display.
Test the indication by use of another live
wire / device.
Software bug
Defective sensors (see point Device is always
at maximum deflection (99)).
Please contact the manufacturer.
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Operating manual – MD 200
EN
08 Cleaning, storage and transport
09 Technical data
m The following is to be observed for cleaning,
storage and transport of the device.
Cleaning
•Do not use any sharp objects or aggressive chemicals to
clean the MD200!
•Please note, that neither the battery compartment nor
the speakers are water-proof and have to be protected
accordingly for cleaning.
Storage
•Protect the MD200 from direct sunlight.
•Please note, that in case of prolonged operation in damp
surroundings water may penetrate the battery
compartment. Following such an application, make
sure that no water has accumulated within the battery
compartment!
•For longer storage disconnect the battery in the battery
compartment.
•Store in dry and dust-free surroundings.
•Do not expose to aggressive media.
Power supply: 4x AA 1.5 V batteries
Operating hours: approx. 50 hours under normal
operating conditions (Alkaline
batteries)
Speaker: Piezo
LCD display: b/w, graphic and numeric
display, battery status
and 50 / 60 Hz indication,
background illumination for
operation in dark surroundings
Control: 3 membrane keys
Weight: 850 g incl. batteries
Length: approx. 113 cm
Sensors: dual Fluxgate sensors
Sensor rod: carbon tube
Protection type
sensor rod: IP68 (until below the
housing edge)
Housing: injection-moulded ABS housing
Protection type housing: IP64 (excluding the
battery compartment)
Operating temperature: -20 °C to 50 °C
•Storage temperature -20 to 50 °C
•Relative humidity 80 %, non-condensing
Transport
•Make sure that the device does not suffer any major
impacts during transport.
•For transport in a vehicle observe the road traffic
regulations on securing cargo.
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Operating manual – MD200
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Operating manual – MD 200
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Operating manual – MD200
Trotec GmbH & Co. KG
Grebbener Str. 7
52525 Heinsberg
Deutschland
+49 2452 962-0
+49 2452 962-200
info@trotec.com
www.trotec.com
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