Dillon EDXtreme, User Instructions

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60 EDXtreme User Instructions
10 Weighing and Force Measurement Practices
The basis for all electronic force measurement or weighing is measurement of stress
in a loadcell body. To obtain optimal results it is necessary to establish a few basic rules,
otherwise the effect may be a nonlinear or non-repeatable response. Read and follow
these tips and see the illustrations on the next page.
10.1 Load Centering
For accurate performance the force acting on the unit
must be in line with the unit. Centering the load is
accomplished by using the shims on each side of the
load cell so that it is centered on the shackle pin. See
the illustration at right. The 50,000 lbf (20000 kgf) and
higher EDXtremes also include spacers supplied with
shackles.
10.2 Alignment
Insure shackles are oriented parallel with the
instrument. Apply load in the center of the shackle bow.
10.3 Proper Pin Fit
A proper fitting pin is important in order to generate an
even stress distribution and avoid yield stresses.
10.4 Torque and Bending
Torque and bending should be avoided. Use swivels on the lifting wire for anti-torque
and avoid side forces.
10.5 Certified Gear
Certified shackles and lifting gear should always be used in accordance to local laws
and federal legislation. Insure all hardware, fittings and line used to sustain the load are
properly sized and rated for the installation. Have the system evaluated by a qualified
engineer if any question or uncertainty exists.
To achieve published accuracy you must use the shackle pins and centering
spacers provided by Dillon.