ABB PFEA 113, User Manual

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Tension Electronics PFEA113, User Manual
Appendix D PFRL 101 - Designing the Load Cell Installation
D-4 3BSE029382R0101 Rev C
D.5 Load Cell Orientation Depending on Measurement Direction
The radial load cell will only measure forces along the axis as shown in the figure to the left.
Therefore the orientation of the measurement direction is important to the amount of signal
output. To help understand how the orientation of the measurement direction affects the output
see the figures below.
Orientation of
measurement direction
Effects
(Two load cells are assumed)
The load cells measure 2 × Tension, but do not
measure the roll weight (Tare).
The load cells measure no Tension, but do
measure the roll weight (Tare).
Rotating the load cells counterclockwise will
begin to gain in signal from the web tension
and will eliminate the output due to roll weight
(Tare). Maximum tension signal will occur at
90° of rotation.
The load cells measure 1 × Tension, but do not
measure the roll weight (Tare).
Rotate the load cells 45° clockwise and the
load cells sense 1.4 × Tension and 70% of the
roll weight.
Positive
Negative
+
measurement
direction
measurement
direction
–
Tension
Tension
+
Horizontal
plane
Tension
Tension
+
Tension
Tension
+
45
°