Reference Manual Rev 1.13
Page 88
004R-646-113
13.3. Using Linearisation
Linearisation is used to approximate the weight output to a non-linear scale. The
chart below shows a non-linear characteristic for the load cell output. From the
chart, it can be seen that the trace with no linearisation applied is a poor
approximation to the real characteristic. By applying one or more linearisation
points, more accurate weight readings can be achieved.
Figure 12: Chart - Non-Linear Characteristic for Load Cell Output
To perform a linearisation, a calibration of the zero and full scale span points must
have been performed. Both the zero and full scale calibration points are used in the
linearisation of the scale base. These two points are assumed to be accurately set
and thus have no linearisation error.
A maximum of ten linearisation points can be set independently between zero and
full scale. Unused or unwanted points may also be cleared. The maximum
correction that can be applied using a linearisation point is + / - 2%.
0
500
1000
1500
2000
2500
3000
3500
0
2
4
6
8
10
Loa d Ce ll Output (m V )
We
ight
(
Kg)
Actua l Lo ad C ell C h aracte ris tic
N o Lin ea ris a tion
L ine a ris atio n App lied
S pan P oint
Zero P oint
Linearis ation P oint