Load Cell Orientation Depending On Measurement Direction - ABB PFEA 111 User Manual

Tension Electronics PFEA111/112, User Manual
Appendix D PFRL 101 - Designing the Load Cell Installation
D.5 Load Cell Orientation Depending on Measurement Direction
Positive
measurement
direction
+
–
Negative
measurement
direction
D-4
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
+
+
+
°
45
Tension
(Two load cells are assumed)
Tension
Horizontal
The load cells measure 2 × Tension, but do not
plane
measure the roll weight (Tare).
Tension
The load cells measure no Tension, but do
Tension
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
Tension
(Tare). Maximum tension signal will occur at
90° of rotation.
Tension
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.
Effects
3BSE029380R0101 Rev C