1 Introduction EFA-200/-300
1-2
The MEM key allows you to record a timer-controlled set of measurements
or to save the measured values in a spatial matrix, and to recall the stored
results as required.
The CONF key enables access to additional functions such as activation of
an alarm, entry of date and time information or the selection of stored limit
value curves.
Function keys are used in all menus to enable access to further
measurement functions.
By default, the parameters set the last time the instrument was used are set
automatically when you switch on again. You can continue measuring
straight away. You can also save your own settings under any name and
recall these as required using the USER key.
1.1.3 Differing features
The main differences between the EFA-200 and EFA-300 result from the
different measurement objectives. They are readily apparent from the
different measurement setups that are used.
EFA-200 – magnetic field measurements
The EFA-200 is for measuring magnetic fields.
The measurement setup consists of the Basic Unit and a B-field probe. One
B-field probe is already built in to the Basic Unit. Two external B-field probes
of different designs are available for making more accurate measurements.
EFA-300 – electric and magnetic field measurements
The EFA-300 additionally measures electric fields.
The measurement setup also includes a Basic Unit, which is identical to the
B-field measuring instrument as regards function and operation. An internal
B-field probe is also fitted and the same external probes can also be used.
E-field measurements become possible when the cube-shaped E-Field Unit
– a precisely aligned plate condenser – is connected. The connection
between the Basic Unit and the E-Field Unit is a fiber optic cable. This
allows the highly-sensitive E-Field Unit to be operated from a distance to
ensure that the effects on the field caused by the operator do not influence
the measurement.
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