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Configuration
9. Enter the units of measurement (max 7 characters). This text is displayed on the LCD and included in iLink unloaded
data files.
10. The General Configuration should look like this:
11. Now select the “Logging” tab and set up the logging parameters. In this example, we are measuring averaged water
level in metres. The Normal log rate in this example is fixed at 15 minutes.
12. Our hypothetical sensor generates an error value of 999.99 if it develops a fault or is unable to take a measurement.
Rather than have this cause a spike in our data, we will choose to reject values above our expected maximum of 20
metres by setting the Reject Above (High) value appropriately.
13. We also want to capture the minimum or maximum values over the period, so we enable the logging of these
additional values as well.
14.
Delta Logging
: It is possible to over-ride the fixed rate logging to an “event” mode for non-pulse sensor types. This is
enabled by setting a non-zero delta value. In this mode the sensor measurements and processing (e.g. averaging) are
still done exactly as before. The only difference in this mode is when the sample is due to be logged, the variation of
the current value from the last logged value is checked. Only if the difference is more than the hysteresis value, the
sample is actually logged. A once per day “check” log is done at the start of the hour which is defined by the “First
Routine Log (Hour)” setting no matter what the difference is.
Note
: Do not set the Process Mode to “Event”. This is
reserved for use with pulse type sources.
15. The logging configuration should now look like this:
16. Next select the “Alarms” node. We are going to set a low level alarm at 3.5 metres and a high level alarm at 17 metres.
Both alarms will have a reset differential of 0.1 metres making the reset levels 3.6 metres and 16.9 metres
respectively. The alarms are set to be immediately acting, so no duration delay is required.
17. Click Add Alarm node to create the first alarm:
