ABB PFVL141V-2.0MN is an industrial-grade, rectangular roll force load cell

ABB PFVL141V-2.0MN  is an industrial-grade, rectangular roll force load cell

When loaded, the body is deformed as shown in the figure below. Note that the amount of defor

mation is considerably exaggerated

At the same time as the tube is compressed vertically (approx. 50 μm at rated load), the inner and

outer circumferences of the tube increase. When subject to a load, the transducer in the load cell

will be exposed to a compressive force in the vertical direction and a tensile force in the horizontal

direction. To eliminate this undesired tensile force, which is caused partly by the load and partly by

the disturbing forces in the core, each measuring zone has vertical slots on both sides. The meas

uring zones are not influenced by tensile forces caused by deformation, disturbing forces, non-uni

form application of forces, bending, torsion, etc., but sense only the vertical component of the

force.

Despite the vertical slots, at the radially located transducer elements in a measuring zone cooper

ate, as do the different measuring zones around the periphery of the load cell, to form a force inte

grating load cell due to the rigid mechanical joints between both the transducer elements and the

measuring zones.

Technical Data for Load Cell QGPR 102/104

The measuring range of QGPR 102/104 load cells is specified on the designation plate mounted

on the load cell, in the calibration certificate and in the order forms. In certain cases, the order

forms may specify the total measuring range of the two load cells used together. This applies espe

cially to rolling mill applications where a pair of load cells is included in a common measuring sys

tem.

Mechanical data, such as weight, width etc. and nominal load for the individual load cells are given

in the order documents Load Cell Signal Characteristics

Nominal load

Nominal load, Fnom, is the maximum load in the measurement direction for which the load cell is

dimensioned to measure within the specified accuracy class. The load cell is calibrated up to Fnom.

Sensitivity

Sensitivity is defined as the difference in output values between nominal load and zero load.

Accuracy and Accuracy Class

Sensitivity

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.

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.