ABB PFTL 101 User Manual page 12

12
Pressductor PillowBlock Load Cells, Horizontal Measuring PFTL 101, User Manual
Signal
Rated output value
at nominal load
Figure 5. Sensitivity
Accuracy and Accuracy Class
Accuracy class is defined as the maximum deviation, and is expressed as a percentage of the sen-
sitivity at nominal load. This includes linearity deviation, hysteresis and repeatability error.
Linearity Deviation
Linearity deviation is the maximum deviation from a straight line drawn between the output values
at zero load and nominal load. Linearity deviation is related to the sensitivity.
Signal
F
nom
Figure 6. Linearity Deviation
Hysteresis
Hysteresis is the maximum difference in the output signal at the same load during a cycle from zero
load to nominal load and back to zero load, related to the sensitivity at nominal load. The hysteresis
of a Pressductor transducer is proportional to the load cycle.
Signal
F
nom
Figure 7. Hysteresis
Sensitivity
Force
F
nom
Force
Force
2 Description
3BSE009965R0401 en Rev E