Fields at Work GmbH, Sonneggstrasse 60, 8006 Zürich, Schweiz
2017 Fields at Work GmbH, Zurich
ExpoM - ELF manual rev. 1.1
Page 9/19
5.2.2
Measurement Data Section (2)
This section is used to manage the measurement data. It allows to download or clear the memory
content of a connected device. The currently displayed measurement can also be saved to a raw file
to be loaded and viewed later without a connected device.
5.2.3
Device and Application Settings (3)
Allows to change the settings of the connected ExpoM - ELF device as well as the settings for the
application (see 5.5 and 5.6, respectively).
5.2.4
Manual Data Acquisition (4)
When a device is connected to the computer, it is possible to manually trigger single measurements.
The device will take a measurement in the selected band and display it in the single measurement
analysis plot. Manually triggered measurements are also stored in the internal logger memory of
the device.
5.2.5
Time Line / Device Status - Plots (5)
The timeline plot shows the field strength of selected frequency components over time. A few
commonly used frequencies, i.e. 16.6 Hz and 50 Hz are set by default. Additional frequencies up to
can be added to the plot in the application settings (see chapter 5.5).
The timeline serves also as main navigation element. Clicking in the timeline plot selects a single
measurement sample from the measurement. The spectrum and the time domain signal from this
sample are automatically displayed in the single measurement analysis plots.
Note that for a frequency component to be displayed in the timeline, the corresponding
measurement samples must have been recorded with a suitable ExpoM - ELF band setting. For
example, it is not possible to display a 5-kHz frequency component from a sample that has been
taken in the
LF (DC
–
1kHz)
band.
The device status plot includes the temperature and battery power level over time within the time
range of the measurement data.
5.2.6
Spectrum / Time Domain - Single Measurement Analysis Plot (6)
This Plot allows to analyze the spectrum as well as the time domain signal of a single measurement
sample. Switching between the two representations is done by selecting the corresponding tab.
5.2.7
Time Line: Navigation and Export (7)
If a measurement contains a large number samples, it may be difficult to find a specific sample just
by clicking into the timeline plot. The navigation section allows to view the samples one by one by
clicking on the arrows of the horizontal scroll bar.
The timeline can be exported to an Excel or CSV file. This is done by clicking on
Export Timeline.
Please note that contents of the exported file correspond exactly to the values displayed in the
timeline. If other or additional frequencies are desired, they must first be selected in the application
