Xylem PL200-H HYDRANT WATER PRESSURE LOGGERS - Manual (Page 21)

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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 PL200H Logger comes factory calibrated but you may want to re-calibrate on
occasion. The pressure sensor is designed to measure over the range of 0-200 psi
but it can be calibrated at lower pressures. The screen above shows channel one
calibrated at 100 psi but set to display up to 200 psi on the main screen.