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Example 2:
A Personal Daq user knows that a linear relationship exists between the voltage output at "Point A" and the
voltage output at "Point B" in a certain electrical device. The linear relationship is constant. The user
wants to monitor the voltage at "Point B," however; it is inconvenient to connect signal lines in that section
of the apparatus.
The user realizes he can take the reading at "Point A" and use the
mx + b
equation to solve for
"Point B." In this example,
B
Volts
= 1.2x + 0.75 Volts
, where B
volts
is the voltage at "Point B" and
x is the voltage at "Point A."
After his acquisition was configured, the user performed the following steps to allow
Personal DaqView to calculate and display B
Volts
.
1.
Left-clicked/right-clicked
on the
units
cell for PD1_A01, typed in
B:Volts
, and hit the
keyboard’s Enter key.
2.
Left-clicked/right-clicked
on the
Scale
cell for PD1_A01, typed
1.2
for the
Scale
, and hit
the keyboard's Enter key.
3.
Left-clicked/right-clicked
on the
Offset
cell for PD1_A01, typed
0.75
for the
Offset
, and
hit the keyboard's Enter key.
4.
Used channel PD1_A01 to acquire voltage readings which represented the voltage at
"Point B" (B:Volts).
5.
Selected the Digital Meters button (14) on the
Main Control Window’s
toolbar and
configured the meter to display readings for PD1_A01 (B:Volts) and PD1_A02.
6.
Clicked the Update All Indicators
button (10) on the
Main Control Window’s
toolbar and
monitored the readings.
PD1_A01 B:Volts Readings resulting from use of the Scale/Offset Feature.
In this example B:Volts is being displayed on the Analog Input Spreadsheet and in a Digital Meter.
Personal Daq User’s Manual
989394
Personal DaqView 4-9
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