User's Manual
80
CHAPTer 7 o DATA COLLECTION
Data in the SRAM buer contains the most recent information and will be
downloaded rst. If there is any data in the ash buer, it will be downloaded
second. However, before the data is wrien to the log le it will be reordered, so
that the oldest data intervals will be near the top of the le.
If you want to cancel the download or if you only want to download a certain
number of intervals, click the Stop buon as soon as the desired number of
interval data records are downloaded. Once the download process has stopped,
a window is displayed that indicates number of interval data records that were
downloaded.
Note
If your sensor experienced power cycles during the study, it may have
been impossible for SmartSensor Manager to determine the timestamp of
some of your intervals. The timestamp entry for these intervals will appear
blank. If you have detailed knowledge about the length of the study and
when the power cycles occurred (and for how long), you may be able to
reconstruct the unknown timestamps. Periodic connection to the sensor is
recommended in order to resynchronize the sensor time in case of a power
cycle.
Interval Data Buffers
The second section of the download screen is Interval Data Buers. This section
has two options, View Data Buer Status and Erase Data Buers.
Selecting View Data Buer Status takes you to the Interval Data Buer
Status screen; see the Data Collection Setup section of this chapter for more
information.
Note
If you are not sure when your storage space will completely ll up with
data; you can click on the View Data Buer Status buon and monitor
its progress. You can also look at the Flash Storage Time entry on the Data
Collection Setup screen to see how long you have before the ash memory
lls up. Multiply the percentage of remaining storage space by the total
Flash Storage Time to approximate the remaining amount of time before
the storage space will completely ll up.
Selecting Erase Stored Data clears the sensor’s memory and starts fresh. If the
storage space is full, data must be downloaded or erased in order for the study to
continue.