Electronic Fluxmeter EF 14
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
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