Sutron Corporation Satlink Operations & Maintenance Manual, Rev 8.04.2 11/3/2016 pg. 129
You can download the whole log or only parts of it. You may specify the start date and optionally
the end date for the downloaded data. You may also ask for data from the last X days.
Downloading via the USB thumb drive will download all the new data since last download.
There are options to download only data from a specific measurement. Events can be excluded
from the log download.
Satlink remembers the last log download and will allow downloads since last download. This
means that the only parts of the log downloaded are those that have not been previously
downloaded.
13.2.
Log Events
Occasionally, Satlink will log events. Events are used to help troubleshoot the data.
The following actions will cause the Satlink to log an event:
Setup change (when any setting is changed)
Log download (when the log is downloaded)
Reset (log contains reset type and count)
Errors (such as low battery and sensor failure)
Before cal and after cal (logged when the user sets the sensor level to record the value
before and after the calibration)
Log in events (if password is enabled), including failure to log in.
Telemetry events (transmission made, message received, etc.)
Alarm events
The setting
Log Daily Values
) determines whether certain log events are logged
every day before midnight.
The setting Log Diagnostics (command line only) sets the software to log transmission diagnostic
information.
13.3.
Logged Time
Measurements are not instant. Once initiated, a measurement takes the user-defined averaging
time, plus some overhead, to complete.
For measurements without averaging, t
he timestamp of the logged measurement is the time
the measurement was started.
The same is true for transmissions. The timestamp of the
transmission is the time when the transmission process was started, not when it was completed.
This means that if a SDI-12 sensor takes 1 minute to provide a result, and the measurement is
setup to go every 15 minutes, the measurement will start at 00:15:00 and complete at 00:16:00.
The logged data will have the timestamp of 00:15:00.
Satlink handles averaged readings in such a way that the last sample is collected at
Meas Time +
Meas Interval.
Please see the averaging section
