Dwyer DLI - Manual (Page 32)

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Definition Graphs
The Definition Graph compares Recorder Units and Scaled Engineering Units when data is input
for the engineering units.
Recorder Units
Select a Recorder Unit must be selected, then input the low/high reference values. When no specific
unit is displayed the Select a Recorder Unit dropdown list (Fig. 1) will contain all available units,
otherwise, it will only contain the unit that relates to the displayed unit (Fig. 2) as shown below.
Fig.1
Fig.2
Scaled Engineering Units
The Scaled Engineering Units, screen shot of Edit Engineering Units , requests the description,
label, and low/high unit values of the engineering unit. The description field allows the full name of
the parameter to be displayed in the software. Examples of this are Volts, Milliamps, pH, Gallons,
etc. This name is displayed on the graph and data table as the description of the data. The label field
allows the label of the parameter to be displayed in the software. Examples are V, mA, pH, G, etc.
The gain and offset fields are the equivalent of the "m" and the "b" respectively in the "Y = m * X +
b" equation. X is the raw data from the device and Y is the data displayed by the software. Choose
the Scaled Engineering Units dropdown list to select THE unit ID. If Use Next Available Unit ID
is set as the default, the software will assign the next available unit ID to the created unit.
If the checkbox Save these units when program closes, screen shot bottom of Edit Engineering
Units , , is checked when the program closes, the created unit will be saved in the software after the
software is closed. Otherwise, the created unit will be lost after the software closes.