Realtime data
Fetching and streaming data
The speed at which a logger takes readings and what it does with those readings depend
on whether the schedule is enabled and whether streaming data is also enabled.
Enabled without streaming
You can enable a schedule without enabling streaming. The logger takes readings as
scheduled at the speed specified in the Sampling period box. This data is stored and can be
downloaded.
If you are still connected to the logger, you can click the start live plot button in the Plot
view. A graphical display appears of the samples fetched from the logger at the default
speed for the logger type rather than of the samples that are scheduled and being stored on
the logger.
Enabled with streaming
You can enable a schedule with streaming enabled. The logger takes samples as
scheduled at the speed specified in the Sampling period box. This data is stored and can be
downloaded only if you also enabled data storage.
The streaming option lets you connect another instrument to the deployed logger to “listen”
to the logger and take action under certain conditions. For example, when a temperature
reading exceeds 30 degrees Celsius, the connected instrument makes a call to you.
In the Plot view, if you are still connected to the logger, you can click the live plot mode
button and select Streaming, and then click the start live plot mode button. A graphical
display appears of the readings being taken at the speed specified in the Sampling period
box.
However, if any tab other than the Information tab is active, the flow of live data
pauses until you click the Information tab.
If you want to view a graphical display of the readings being taken at the default speed for
your logger type, select the Fetching mode instead of the Streaming mode.
Not enabled
When a schedule is not enabled, the logger does nothing by default. However, if you are
still connected to the logger, you can click the start live plot button in the Plot view. The
logger immediately begins fetching samples at the default speed for your logger type, and a
graphical display of the live data appears. The data is not saved on the logger and therefore
cannot be downloaded.
November 5, 2010
Rev1.4
18