Measurement Computing LogBook Series - Manual (Page 147)

Software Reference 989592 LogView LV-21
LogView automatically computes the Cal Offset factor (near 0) and Cal Scale factor (near 1).
From this point on, LogView automatically applies the y = mx + b equation to the incoming reading,
resulting in a calibrated reading.
Using Digital Outputs As Alarms
Using LogView's calculated channel capability (see page LV- 36), digital outputs can be stimulated by
events such as signal levels in analog inputs (e.g., to sound an alarm at a rising temperature before a test
system over heats).
1. Click the Analog <Input> button to activate the Analog Input Channel Configuration
window.
2. Turn on the analog input channel that you'd like to use to stimulate a digital output
channel.
3. Click the <Calc> (Calculated Channel) button to open the Calculated Channel
Configuration window.
4. Click the <Add New Channel> button (located just right of the F(x) button); or select
“Add New Channel” from the Edit pull-down menu to activate the first or next calculated channel.
5. In the Calculated Function column, type in the following equation "(P1_CH00 > 30.0) & 1". If
you're not using channel 0, replace P1_CH00 with your channel tag. This equation will yield a 1 in
its least significant bit when the value of channel 0 is above 30, and 0 when it is below 30.
Entering an Equation (Function Expression)
To verify accurate use of syntax, access the Equation Assistant (see following figure) via
the F(x) button and click the <Validate> button. Refer to page LV-37 for detailed
information regarding the Equation Assistant.