Mounting Alternatives, Calculating Force And Calculating Wrap Gain; Horizontal Mounting - ABB PFEA 111 User Manual

Tension Electronics PFEA111/112, User Manual
Appendix C PFTL 301E - Designing the Load Cell Installation
C.5 Mounting Alternatives, Calculating Force and Calculating Wrap Gain
C.5.1 Horizontal Mounting
PFTL 301E
No horizontal web tension force
applied to the load cell.
PFTL 301E
= T × (cos   cos )
F
R
F = 0 (Tare force is not measured)
RT
F = F
Rtot
T (Tension)
Wrap gain
Wrap gain
C-4
Tare
T
T
= Measurement direction

F
R
Tare
T
= Measurement direction
= T × (cos   cos )
+ F
R RT

Wrap gain F
=
R
T T
------- - ------------------------------------------
= =
   
F T cos – cos
R
1
= ---------------------------------
 
cos cos
–
In most cases, horizontal mounting is the most obvious
and simplest solution. The load cell should thus be
mounted horizontally when possible.
However, should the machine design require inclined
mounting of the load cell or should the web path not give
a sufficient horizontal force, see figure, the inclined
mounting is permitted and the calculations are somewhat
more complex, (see
The PFTL 301E load cell measures the horizontal forces
applied to its top surface. The load cell can measure in

both directions. The vertical applied forces are not
T
measured and do not influence the horizontal
measurement. There is one source of horizontal forces;
the force from the web tension (the tare weight has no
force component in measuring direction). See the force
calculations in the figure.
Divide the total horizontal force F
required capacity of each load cell.
Do not oversize an ABB load cell for overload purposes
as the load cell has sufficient overload capacity.
Section C.5.2, Inclined Mounting).
by two to get the
Rtot
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