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XVI. Analog Setup:
The Analog Setup screen sets the engineering units and calibration numbers for
each of the analog channels, the endpoints of the bar graphs in the main screen and
which of the analog channels are enabled. These channels are calibrated in the
same way so a single channel will be discussed. It is important to note here that the
information stored in the data logger's memory is just the sensors output level before
it is adjusted by the following calibration parameters. These parameters are used to
adjust the stored data for display and storage purposes only, at the time the data is
downloaded. If they are changed, the same stored data can be downloaded again
and the data will be scaled differently according to the new settings.
The calibration of channel one to a water level sensor is discussed in the following
example. The water level sensor shown is designed to measure over the range of
0-3 feet but a water column of 3 feet may not be available. The sensors can be
calibrated over any range such as 0 to 2 feet, even when it is desirable to measure
beyond these limits.
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