• If a safe operation can no longer be assumed, the device must be put out of op-
eration and secured against unintended operation. Safe operation can no longer
be assumed if:
- the device is visibly damaged,
- does not function any longer and
- the unit was stored under unfavourable conditions for a long period of time or
- it has been subjected to considerable stress in transit.
• Never switch the device on immediately after having taken it from a cold to a warm
environment. The condensation that forms might destroy your device. Allow the
device to reach room temperature before switching it on.
Do not disassemble the product!
• Do not leave the packaging material lying around carelessly, since it could become
a dangerous toy for children.
• On industrial sites, the accident prevention regulations of the association of the
industrial workers‘ society for electrical equipment and utilities must be followed.
• Measurement instruments used in schools, training facilities, do-it-yourself and
hobby workshops should not be handled unless supervised by trained, respon-
sible personnel.
If you have doubts about how the device should be operated or how to connect it
safely, consult a trained technician.
• Please handle the product with care. The product can be damaged if crushed,
struck or dropped, even from a low height.
Regularly check the technical safety of the device e.g., for damage to the
casing or pinching of the cables, etc. The device may in no case be opened
or used, if the covers have been removed.
!RISK OF FATAL INJURY!
If you are not sure about the correct operation or if questions arise which are not
covered by the operating instructions, please do not hesitate to contact our techni-
cal support or another specialist.
Operating controls
1 Test probes for voltage check
2 Torch
3 Display range
4 Handle
5 ON/OFF switch
6 Torch button
7 Battery lid
Operating instructions
MS-520 Voltage and magnetic field meter
Item no. 1601758
Intended use
The non-contact magnetic field and voltage tester is used to test magnetic fields and alternating
electric fields. The tester is ideal for testing the functioning of inductors carrying currents, such
as relays, magnetic valves, etc. In addition, voltage can be tested on insulated cables. The
tester works without contact and therefore no direct contact with the test object is necessary.
As a result, housings usually do not have to be opened. When a magnetic field is detected, the
test tiplights up solid yellow. If an alternating electric field is detected, the probe starts glowing
red and a sound alert can be heard. In case of simultaneous detection of electric and magnetic
fields, the yellow and the red LEDs will flash alternately.
Additionally, the tester has an integrated LED lamp.
The magnetic field and voltage tester is powered by two micro-batteries. Do not use any other
power source.
For safety and compliance reasons, the product must not be converted or modified in any way.
If you use the product for other purposes than those described above, the product may be dam-
aged. Furthermore, improper use may cause risks such as short-circuits, fire, electric shocks,
etc. Please read the operating instructions carefully and do not discard them. If you pass the
product on to a third party, please include these operating instructions.
Package contents
• Voltage and magnetic field meter
• 2 batteries, type Micro / AAA / LR03
• Quick guide
Up-to-date operating instructions
Download the latest operating instructions via the link www.conrad.com/downloads or scan the
QR code. Follow the instructions on the website.
Explanation of symbols
The lightening flash symbol in a triangle warns against the risk of an electric shock
or interference with the electrical safety of the device.
An exclamation mark inside a triangle indicates important notes in the operating
instructions.
The arrow symbol indicates special information and advice on operating the device.
Continuous double or reinforced insulation in accordance with category II
DIN EN 61140.
Safety instructions
Please read through the quick guide carefully before using the device. It con-
tains important information on its correct operation.
The warranty will be void in the event of damage caused by failure to observe
these safety instructions! We do not assume any liability for any resulting
damage!
We shall not accept liability for damage to property or personal injury caused
by incorrect handling or non-compliance with the safety instructions! The
warranty/guarantee will be void in such cases.
• Unauthorised conversion and/or modification of the product is not allowed for
safety and approval reasons. Do not disassemble the product.
• The product is not a toy. Therefore, be especially careful when children are around.
• The device may not be used for verification of voltage absence. Absence of volt-
age may only be verified by a bipolar voltage tester according to EN 61243-3.
• The audio signal heard, when voltage is checked, provides no reliable indications
as to type and level of the voltage.
Only touch the device by the handle areas provided for that purpose. Do not cover
indicator elements.
• Take particular care when dealing with voltages exceeding 30 V AC or 30 V DC!
Even at these voltages, there is a danger of fatal electric shock if you touch electric
conductors.
• Do not use the device in rooms or under unfavourable ambient conditions in which
there are or could be combustible gases, vapours or dust.
• Do not use in the immediate vicinity of:
- strong magnetic or electromagnetic fields
- transmitting aerials or HF generators.
These can affect the results of the measurement.
