Fields at Work GmbH, Sonneggstrasse 60, 8006 Zürich, Schweiz
2017 Fields at Work GmbH, Zurich
ExpoM - ELF manual rev. 1.1
Page 6/19
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3
Using ExpoM - ELF
3.1
Starting a Measurement
As soon as the device is turned on by means of the ON/OFF switch it starts to measure and log the
data using the last device settings. The device can be turned on and off at any time. When ExpoM -
ELF is powered on, the new measurements are appended to the existing log file preserving all
previously recorded data. The data internal memory can be deleted using the ExpoM - ELF Utility on
the PC (see chapter 5).
3.2
Setting a Marker
The Marker button on the top of the device can be used to flag single measurement samples. The
flagged samples are highlighted by means of an ascending marker number visible in the exported
data.
3.3
Personal Measurements
When using ExpoM - ELF for personal measurements the movement of the person will lead to
measurement artifacts due to the magnetic sensors that are moved through the static earth
magnetic fields. These artifacts can lead to a lower measurement sensitivity towards lower
frequencies and have therefore to be taken into account when interpreting the measured data. This
aspect is addressed in detail in our application note
“ExpoM
- ELF Measurement Procedures: Tips
and Recommendations”
which can be found on our homepage.
Important Notice:
A moving person carrying the device induces artifacts in the measurements. If
very low field strengths are to be measured it is recommended to move the ExpoM - ELF device as
little as possible during the measurements.
