User`s manual

NexSens Technology, Inc.
iSIC User‟s Manual 63
3.2.5 Step 5 – Log
Select each data logger from the site list and enter the desired Log Interval and Sample
Interval for the data logger in the Interval section. In the Log Value section, select how the
data logger should log data points.
Log Mode
The Log Mode controls when data is logged by an iSIC. In Time-base (the default and most
common), data is logged at a specified interval, controlled in the Time-base section. In
Event-base log mode, data is only logged when a ground pulse is sent to the Rain input pin
on the iSIC digital terminal strip (such as from the contact closure of a tipping bucket rain
gauge).
Log Value
By default, the Sample Interval and Log Interval are equal. When a sampling interval is
different than the log interval, all the sampled measurements for the iSIC are used to
calculate the average, minimum, or maximum of that logging interval (based on the log
type selected, only one can be selected at a time). The individual data points that comprise
the samples are not saved; only the final, average, minimum or maximum data point is
saved at the specified log interval.
Log Memory Mode
The default memory mode is Roll over, and is the recommended operating mode. In this mode,
the last ~150K readings (when using 512K flash) will be stored in iSIC memory. When the iSIC
memory has filled with readings it will “roll over” the original readings and keep logging. This is
ideal for real time applications, where data is being uploaded to a PC as
In Stop memory mode, the first ~150K readings (when using 512K flash) will be stored in the
iSIC memory. When the iSIC memory has filled with readings, it will stop logging until memory is
cleared. When operating in this mode, it is recommended that memory is cleared every time
data is uploaded.