Table of Contents
Advertisement
Determine correct values for Display reading (Rd min and Rd max). In most cases, Rd min
and Rd max are equal to the minimum and maximum of the transducer output range.
Rd min = 0
Rd max = 100.0
We have to scale our meter to have an input 0 to 3000 (30 mV) displayed as 0 to 100.0 (lbs)
Assume that the shape of the transducer response characteristic is equal to the shape of the
parabola (Y=KX^2)
Output = K x Input^2, there K = Output / Input^2 = 100.0 / (3000^2) = 1 / (9 x 10^4)
Output = Input^2/(9 x 10^4)
Let's build the response characteristic of our transducer based on the seven inputs within the
range of the transducer (7 linearization points)
Input (X): In 1=0
--------------------------------------------------------------------------------------------------------------------------
Output (Y): Rd 1=0 Rd 2=2.8 Rd 3=11.0 Rd 4=25.0 Rd 5=44.4 Rd 6=69.4 Rd 7=100.0
120
100
80
60
40
20
0
0
The following commands need to send to the meter to create this response characteristic.
First make sure that Decimal Point on your device is set to the proper position.
Then, disregard the decimal point position through Scale and Offset calculation.
For instance: to display 0 to 100 set decimal point into position 1 (FFFF);
In 2=500 In 3=1000 In 4=1500 In 5=2000 In 6=2500 In 7=3000
1000
to display 0 to 100.0 set decimal point into position 2 (FFF.F)
then, perform Scale and Offset calculation to display 0 to 1000.
Output
2000
3000
Input
44
Output
4000
Hide quick links:
Advertisement
Table of Contents
