Application Examples - Brainchild VR18 User Manual

6. Application examples

Example 1: Flow measurement
A level has to be converted into a flow according to the following formula.
Q ( calculated flow speed in liter per minute ) = 0.0072*h *60
h ( level range in mbar per second ) = 0 – 30 mbar
In 4.1 Channel Mode of Configuration, set AI1 as follows,
Name: Level 1
Method: Instant
Offset: 0.00
Sensor: Current
Scale Unit: mbar
Press Math to get into Math Channel and set Math1 as follows,
Name: Flow 1
Type: Enable
Expression: 0.0072*AI1^2.5*60
Unit: l/min
Example 2: 8:00 am start logging, 17:00 pm stop logging Monday-Friday
Select Tools mode of Configuration, and define Timer 1 – 4 as follows,
Timer 1
Type: Daily
Time: 8 Hour 0 Min.
Job 1: Start logging
Timer 3
Type: Weekly
Time: Saturday
Job1: Stop logging
Desc: xxxxxx
Speed: 1 S ( 1 second / data )
Gain: 1.000
Range: 4.0 〜 20.0
Unit: mA
Low: 0.00
Desc: xxxxxx
Log Method: Instant
Low: 0.0
Action: Enable
Action: Enable
8 Hour 1 Min
High: 30.00
Speed: 1 S
High: 2200.0
Timer 2
Type: Daily
Time: 17 Hour 0 Min.
Job 1: Stop logging
Timer 4
Type: Weekly
Time: Sunday
Job1: Stop logging
78
Action: Enable
Action: Enable
8 Hour 1 Min