Xylem WQ-FDO Sensor and GL500-7-2 Data Logger - Manual (Page 22)

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The calibration of channel one to the DO partial pressure output sensor is discussed
in the following example:
Enable: If the “Enable” box at the top of a column is checked,
data for that channel will be shown in the historical record and
be available for export to a spreadsheet. The data for all of the
analog channels is always being recorded whether the channel
is enabled or not. A channel can be re-enabled at any time to
view recorded data.
Units: This field shows the units that will
appear at the top of the data column for
that channel in the historical record as well
as the display of data in the main screen.
Click on the field to enter the unit or select
from a predefined list.
High EU: The High EU field is the engineering unit where the
highest output from the sensor is achieved during the calibration process, in this
case a oxygen partial pressure of 400mbar corresponding to a 20.00mA output.
Low EU: The Low EU field is the engineering unit where the lowest output from the
sensor is achieved during the calibration process, in this case zero mbar
corresponding to 4.00mA
High Raw: This is the raw data value as measured by the GL500 Data Logger that
corresponds to the High EU value and is automatically set by the calibration process.
In this case, the raw data value returned by the logger at a pressure of 400 mbar.
Low Raw: This is the raw data value as measured by the logger that corresponds to
the Low EU value and is automatically set by the calibration process. In this case,
the raw data value returned by the logger for a partial pressure of zero.
Disp High: This field sets the upper limit of the bar graph displayed in the main
screen and provides a way of scaling the graph beyond the upper limit used to
calibrate the logger. In this example, the upper display value is 400mbar.