USER MANUAL SAGA
Page 30 of 47
Measurement Configuration
Configure the ambulatory recording to your needs in the application software. It is
not possible to stream data during ambulatory measurements; all measurement data
is logged on the on-board memory of the Data Recorder.
Start/stop using the Recording button
The button on the Data Recorder marked with an SD Card icon can be used to start
and stop an ambulatory recording. Press and hold the button for 2 seconds to start
recording. Press and hold for 2 seconds again to stop the recording.
Start or Stop recording time
In some user scenarios, the recording should start and/or stop at a specific moment
in time. The start and stop recording times can be configured in
the application software. The time of the Data Recorder is
synchronized to time of the PC when the Data Recorder connects
to a Docking Station that is connected to a PC.
After saving the configuration on the device, the Card Recording
icon will light up green. You may now switch off the device. The
device will start automatically when the start recording time is
reached. When you switch on the Data Recorder before the start
recording time is reached, the start-up sequence will show, after
which the Card Recording icon lights up; after 1 minute the device
goes back to sleep mode until start recording time is reached.
You can always approach the configuration when you dock the Data Recorder on
the Docking Station.
Downloading measurement data from Data Recorder
When the ambulatory recording is finished, the data can be retrieved via the
application software. The recordings are downloaded and stored on the PC for
further analysis. Depending on the configuration and length of the ambulatory
recording, downloading all data may take a while (several minutes to hours). In the
meantime, the system cannot be used for other measurements.
Impedance Measurement
The Data Recorder can be switched to impedance mode. In impedance mode the
user can measure the electrode contact quality of all unipolar channels, including
that of the Patient Ground and Common Reference electrode.
The impedance mode is activated in the application software. The impedance value
ranges from 0 k
Ω
to 500 k
Ω
and is an indication of electrode contact quality, where
lower values indicate better electrode contact. If the impedance measurement
indicates 500 k
Ω as value, there is no contact between skin and the electrode.
If
electrodes do not make good contact effects that may appear are increase of noise,
mains interference (50/60 Hz) or in electrodes that toggle around the edge of
connection/disconnection.
