Magnet-physik EF 14 User manual

BA - No.: 100514EBA02
Emil-Hoffmann-Strasse 3
50996 Cologne
Germany
Operating Instructions
Electronic Fluxmeter
EF 14
Preserve for future application!

Electronic Fluxmeter EF 14
BA
–
no.: 100514EBA02
December 9
th
, 2020
Page
2
Introduction
Dear customer,
You have decided on a high-quality product from MAGNET-PHYSIK. We are convinced that
our product will be a valuable help in your daily work. Condition is that the operating
instructions are read carefully and observed. We will not take over any warranty or liability in
case of deliberate faulty operation or disregard of our safety notes.
If you face any problems while working with the equipment or the operating instructions or if
you have any proposals for improvements please do not hesitate to contact us.
Purpose
The operating instructions provide an overview of applications and functions of the Electronic
Fluxmeter EF 14.
Target group
The operator and the owner of the device will find all the necessary information to operate this
device in the following pages.
Manufacturer
MAGNET-PHYSIK,
Dr. Steingroever GmbH
Emil-Hoffmann-Str. 3
50996 Cologne
Germany
Tel. 02236 / 3919-0
Fax. 02236 / 3919-19

Electronic Fluxmeter EF 14
BA
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no.: 100514EBA02
December 9
th
, 2020
Page
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Note
 These operating instructions do not include all detailed information on the product nor do
they consider every possible set-up, operation or installation as this would be too extensive.
 Should you require further information or if particular problems arise which have not been
dealt with comprehensively in the operating instructions then the required information will
be supplied by MAGNET-PHYSIK.
 We would also like to point out that the contents of these instructions are not part of a
previous or existing arrangement, agreement or legal relationship, nor are they a
modification of the same. All obligations on the part of MAGNET-PHYSIK are explicitly
stated in the sales contract which contains the complete and only valid warranty clauses.
These warranty clauses are neither extended nor limited by implementation of these
instructions.
 MAGNET-PHYSIK GmbH, Köln 100514EBA02/2020
Passing on and reproduction of these documents, and utilization
and disclosure of their contents is prohibited unless specifically
authorized. Violations shall be cause for damage liability.
All rights reserved.
Subject to alterations
Although the contents of this publication have been checked for
agreement with the hardware and software described, we do not
accept liability for total agreement since differences cannot be
completely excluded. The information in this publication is
checked at regular intervals and necessary corrections included in
the next release. Your suggestions for improving this publication
are welcome.

Electronic Fluxmeter EF 14
BA
–
no.: 100514EBA02
December 9
th
, 2020
Page
4
Table of Contents
1 General Information .................................................................................................... 6
1.1 Safety Instructions ............................................................................................... 6
1.1.1 Intended Purpose ............................................................................................. 7
1.1.2 Sources of Danger ........................................................................................... 7
1.1.3 Authorized Operator ........................................................................................ 8
1.1.4 Place of Installation ......................................................................................... 8
1.1.5 Safety Checks .................................................................................................. 9
1.1.6 Emergency Measures ....................................................................................... 10
1.2 Instrument Description ........................................................................................ 10
1.3 Specifications ....................................................................................................... 10
1.4 Ambient Conditions ............................................................................................. 12
2 Taking Into Operation ................................................................................................. 14
2.1 Unpacking and Checking ..................................................................................... 14
2.2 Packing for Dispatch ............................................................................................ 14
2.3 Plug Connections ................................................................................................. 14
2.4 Connecting and Start ............................................................................................ 15
3 Operation ....................................................................................................................... 18
3.1 Display ................................................................................................................. 18
3.2 Keypad ................................................................................................................. 19
4 Device Functions ........................................................................................................... 21
4.1 Reset ..................................................................................................................... 21
4.2 Max./Min. ............................................................................................................ 21
4.3 Peak ...................................................................................................................... 22
4.4 Drift ...................................................................................................................... 23
4.5 Unit ...................................................................................................................... 24
4.6 Limit ..................................................................................................................... 25
4.7 AC/DC ................................................................................................................. 26
4.8 Range ................................................................................................................... 26
4.9 Coil ....................................................................................................................... 26
4.10 Var. ...................................................................................................................... 29
4.11 Measuring Data Memory ..................................................................................... 30
4.12 Mode Menu .......................................................................................................... 31
4.12.1 Save Coil .......................................................................................................... 31
4.12.2 Load Coil ......................................................................................................... 31
4.12.3 Information ...................................................................................................... 32
4.12.4 Contrast ............................................................................................................ 32
4.12.5 RS 232 ............................................................................................................. 33
4.12.6 Send Data ......................................................................................................... 33
4.12.7 Set Local .......................................................................................................... 33

Electronic Fluxmeter EF 14
BA
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no.: 100514EBA02
December 9
th
, 2020
Page
5
5 Operating Information ................................................................................................. 34
5.1 Input Resistance and Coil Resistance .................................................................. 34
5.2 Measurement of the Maxima of Magnetizing Impulses ...................................... 35
5.3 AC Measuring Operation ..................................................................................... 36
5.4 Measuring Rate .................................................................................................... 37
6 Remote Control ............................................................................................................. 39
6.1 Serial Interface ..................................................................................................... 39
6.2 Basic Commands ................................................................................................. 40
6.3 Read and Write Commands ................................................................................. 40
6.3.1 Measuring Commands ..................................................................................... 40
6.3.2 Measuring Modes ............................................................................................ 42
6.3.3 Instrument Functions ....................................................................................... 43
6.3.4 Limit Commands ............................................................................................. 44
6.3.5 Coil Data Commands ....................................................................................... 45
6.3.6 Interface Commands ........................................................................................ 47
7 Pin Assignments of Plugs and Sockets ........................................................................ 49
7.1 Measuring Coil Connections ............................................................................... 49
7.1.1 Input Socket on the Front Panel ...................................................................... 49
7.1.2 Pole Clamps on the Rear Panel ........................................................................ 50
7.2 RS 232 Interface .................................................................................................. 50
7.3 Multi-functional Socket ....................................................................................... 51
7.3.1 Limit Relays .................................................................................................... 52
7.3.2 Digital Control Lines ....................................................................................... 52
7.3.3 Analog Outputs ................................................................................................ 52
8 Maintenance .................................................................................................................. 54
8.1 Maintenance Plan ................................................................................................. 54
8.2 Checking for Damage .......................................................................................... 54
8.3 Calibration ........................................................................................................... 54
8.4 Troubleshooting ................................................................................................... 54
8.5 Taking Out of Operation ...................................................................................... 55

Electronic Fluxmeter EF 14
BA
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no.: 100514EBA02
December 9
th
, 2020
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1 General Information
This chapter gives an introduction to the fluxmeter EF 14. The EF 14 is a multi-purpose, fully
equipped electronic fluxmeter. Depending on the measuring coil attached, various
measurements can be carried out.
If you have just received your EF 14, make sure you familiarize yourself with the safety
instruction in this chapter and the instructions for taking the EF 14 into operation in chapter 2.
The complete and detailed user information on the instrument and the measuring modes can be
found in chapters 3, 4 and 5. Chapter 6 deals in detail with the remote control of the EF 14 by
means of the serial interface. The connectors of the EF 14 are described in chapter 7.
1.1 Safety Instructions
The following general safety measures must be adhered to at all times when the device is in use,
being serviced or being repaired. Failure to observe these measures, or warnings given in other
parts of these instructions, may influence the safety standards of the construction. MAGNET-
PHYSIK Dr. Steingroever GmbH, Cologne, will accept no responsibility should the customer
neglect the prescribed safety instructions.
Special safety instructions, whose non-observance may lead to injuries and/or property damage,
as well as important hints, are marked within these operating instructions as follows:
Danger!
Means that serious bodily injury resulting in death or considerable material
damage may occur if the appropriate safety measures are not taken.
Warning!
Means that serious bodily injury or considerable material damage may occur
if the appropriate safety measures are not taken.
Caution!
Means that light bodily injury or material damage may occur if the
appropriate safety measures are not taken.
Important!
Indicates important information which is to be paid particular attention.

Electronic Fluxmeter EF 14
BA
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no.: 100514EBA02
December 9
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, 2020
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1.1.1 Intended Purpose
Important!
It must be explicitly stated that the Electronic Fluxmeter EF 14 is to be used
only for its intended purpose.
The intended purpose of the EF 14 is the measurement of magnetic flux
and quantities that can be derived from this, by means of measuring
coils.
Every application not in accordance with this intended purpose is prohibited
and implies the deliberate dealing with non-calculable risks for both the
operator as well as the equipment.
Unauthorized reconstruction of and/or alterations to the equipment are
forbidden for safety reasons!
The instructions as stipulated in this operating manual for operation and installation are to be
strictly observed!
1.1.2 Sources of Danger
Danger!
To minimize the danger of electric shock the device casing must always be
grounded. The device must be connected to an approved 3-pole socket using
a 3-wire power cord. Care must be taken that the grounding wire is securely
connected to an electrical ground (PE).
Danger!
Under no circumstances the instrument must come into contact with liquid
mediums, such as water, oil, etc. If in spite of all precautions taken, such a
medium comes into contact with the electronics of the EF 14, there is
considerable danger for the operation of the device. In this case the device
must be shut down immediately.
The equipment must always be switched off when being cleaned.
Never clean with water! Use dry cloths only for cleaning!
Danger!
The measuring coil must never be brought into contact with an electrical
voltage conductor. The sleeve or paint on the coil surface is not an electrical
insulation. Disregard of this warning can cause danger to life of the user.
Additionally the device and the coil can be damaged.

Electronic Fluxmeter EF 14
BA
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no.: 100514EBA02
December 9
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, 2020
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Danger!
Do Not Operate In An Explosive Atmosphere
Do not operate the instrument in the presence of flammable gases or fumes.
Operation of any electrical instrument in such an environment constitutes a
definite safety hazard.
Caution!
Keep Away From Live Circuits
Operating personnel must not remove instrument covers. Component
replacement and internal adjustments must be made by qualified
maintenance personnel. Do not replace components with power cable
connected. To avoid injuries, always disconnect power and discharge
circuits before touching them.
Caution!
Do Not Substitute Parts Or Modify Instrument
Due to the risk of electrostatic discharge and because of the danger of
introducing additional hazards, do not install substitute parts or perform any
unauthorized modification to the instrument. Return the instrument to
MAGNET-PHYSIK Dr. Steingroever GmbH, Cologne, Germany or an
authorized representative for service and repair to ensure that safety features
are maintained.
1.1.3 Authorized Operator
The EF 14 may only be used and connected by personnel authorized by owner.
The owner must in this case:
 place operating instructions at the operator's disposal at all times and
 make sure the operator has read and understood them.
1.1.4 Place of Installation
No special safety measures are necessary at the place of installation.
Important!
The EF 14 must always be placed on a solid base, e.g. a table.
Never operate the equipment in places where one or more of the limiting
values for t
he ambient conditions are exceeded.

Electronic Fluxmeter EF 14
BA
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no.: 100514EBA02
December 9
th
, 2020
Page
9
1.1.5 Safety Checks
All safety checks as described here must be carried out regularly and carefully. Please use the
checklist “General Check” for safety checks
Check Intervals:
 Once a year and
 after every repair
Contents of check:
 specified condition  specified function
Table 1: Checklist for safety check
General Check and Functional Tests
General Check:
Switch off the device and disconnect it from mains power supply.
Visual control check of instrument casing
undamaged
Visual control check of connection cables
undamaged
Functional test:
Before functional test the device must be connected to mains power supply.
EF 14
switch on
with power switch
Display
Display lights up
EF 14
switch off
with "Power Off"
-
key
Display
extinguishes
Check Date:________________ Operator (Signature): ________________________
Important!
We recommend having the instrument and, if appropriate, the measuring
coils periodically recalibrated to ensure traceability of the measuring results.
The suitable recalibration interval depends on the operating conditions and of the quality
management stipulations of the owner. Intervals of one to two years are usual, depending
whether the instrument is continuously used in rough production environment or from time to
time under laboratory conditions.

Electronic Fluxmeter EF 14
BA
–
no.: 100514EBA02
December 9
th
, 2020
Page
10
1.1.6 Emergency Measures
In the case of emergency, when all safety instructions fail, disconnect the device from the
power supply and proceed as follows:
Important!
Take emergency measures, such as “First-aid“, securing the device and
work place against further use and finally write the case report.
1.2 Instrument Description
The EF 14 is easy to operate via the front panel keys and has an easily readable LC display. The
alphanumerical display allows user control supported by help texts.
To use the EF 14, a suitable measuring coil must be connected to the input. The following coil
types are most frequently used:
 Field measuring coils, often also called search coils, are used for the measurement of the
magnetic field strength or flux density at the pole faces or in air gaps of magnet systems.
They have defined area turns, usually given in cm². Field measuring coils with particularly
small dimensions are also referred to as point coils. To measure the flux density in the air
gap of loudspeaker systems, stray field compensated coils are used.
 Potential measuring coils are required to measure magnetic potentials on magnets or
magnet systems. The measuring results can be used to determine where losses occur in a
magnet system. Furthermore the inner field strength of a magnet can be determined with a
potential measuring coil.
 Moment measuring coils, particularly Helmholtz coils, allow the determination of the
magnetic moment, dipole moment and polarization of two-pole magnetized components of
hard magnetic materials. Measurement with a moment coil is a particularly fast method
which is frequently employed in quality control. The combination of a moment measuring
coil with a field generating system is referred to as a saturation coil. It can be used to
determine the saturation polarization of soft magnetic materials.
 Surrounding coils are used to measure the magnetic polarization of permanent magnets or
soft magnetic magnetized parts. They are mostly used in measuring systems like the
PERMAGRAPH® or the REMAGRAPH® to record the magnetization curve.
The EF 14 is a highly sensitive electronic measuring instrument for the measurement of
magnetic flux. For this reason the measuring results may be influenced by electromagne-
tic stray fields.
1.3 Specifications
Measuring input: 15 pole Sub-D socket on the front panel, pole clamps on the rear
panel (alternately usable)
Input resistance: 100 k