LNU sensor : Installation & programming
Installation Guide
K0J00016-EN-A02
IJINUS – 25 ZA de Kervidanou 3 – 29300 MELLAC – FRANCE
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www.ijinus.com
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Change measure period on height threshold
For some sensors, you can have two different time of data acquisition depending on water height measures. For
example, you can measure every hour when the level is low and accelerate to every 2 minutes when level goes above a
threshold value. This measurement period acceleration can be set to some time slots, following an exceedance of level
(with or without hysteresis) and with the choice of a minimum time before deceleration.
The limit of this acceleration is it can only be done with a water height measurement. If you wish to accelerate the
measures as soon as the water go over one level between two measurements, you have to connect one of our overflow
detectors to the ultrasonic level sensor.
Define a threshold / software overflow detection (Two can be set)
After the programing of the first threshold, you can then define a second one. This second threshold makes it possible
to record a software overflow. This option creates a new file with a start time for change of state (measured height
higher than the indicated threshold) and a time to return to a "non-overflow" state. (Height measured lower than the
indicated threshold).
This threshold also makes it possible to anticipate the data sending (if the logger is equipped with a communication
card) on activation and/or deactivation of the threshold.
To go further and use the advanced parameters: Zoom on the debugging echoes (acoustic signature) and the
replacement values in case of loss of echoes.
All advanced parameters won’t be explained here, but two zooms
on very useful functionalities are proposed here:
Debugging echoes
The record of debugging echoes is very useful to log when there is a difference between two successive
measures (on
rise and or on lowering: here 75 for both), the acoustic signature of the measures, or the famous ultrasonic echo. A post
review allows you to evaluate the quality of level measurements and to correct them if needed.
