Rice Lake Z6 Single-Ended Beam, SS Welded-seal, IP67, OIML C3 - Manual (Page 30)

26 Load Cell and Weigh Module Handbook
Allowable Movement
Figure 14-13. The Three Module Designs of the
Paramounts System Include the (a) Fixed-Pin Module,
(b) Free-Sliding Module, and (c) Side-Stop Module
a . Fixed-Pin Module – With the fixed-pin module, the load is
transferred from the top plate to the load cell via a load pin
which enters a counterbore in the top plate and load cell. The
pin acts as a pivot point and only allows the top plate to rotate
while fixing the corner of the vessel.
b. Free-Sliding Module – With the free-sliding module, the
load pin has a flat top surface on which the top plate is free to
slide in all directions. To minimize friction, the top surface of
the pin is PTFE-coated and slides on a smooth stainless steel
slider plate. The cleanliness of these two surfaces is assured
by a neoprene suction seal.
c. Side-Stop Module – The side-stop module uses the same
PTFE-coated pin and stainless steel slider plate, but in
addition it has side bumpers. These bumpers check the top
plate movement laterally. The top plate is checked to move
only in the direction of the longitudinal axis of the load cell.
A three-cell system uses one of each style of module; all
additional modules are free-sliding.
Construction and Features
1. No Torsional Effects: All SB4, SB10 and SB5 load
cells incorporate a blind hole for load introduction.
The load is introduced via a convex loading pin. The
convex surface allows the module’s top plate to rock
without twisting the cell. The load pin is centered in
the load hole by a pliable polymer “O” ring. The
bottom of the blind hole is located on the neutral axis
of the Flintec sensing section. Therefore, torsional
effects are virtually eliminated.
2. Jacking Screw and Lift-Off Protection: Each
module consists of a base plate to which the load
cell is attached and a top plate through which the
load is introduced. A safety check screw is rigidly
fixed to the top plate and passes through a large
clearance hole in the washer plate attached to the
base plate. This screw prevents lift-off and also
may be used to jack up the empty vessel for load
cell replacement.
3. Allows Movement: There are three different styles of
modules resulting from differences in the top plate
and loading pin design. Each serves as part of a
complete system that allows free movement of the
attached vessel.
4. Matched Outputs: The SB4, SB10 and SB5 load
cells are matched output, stainless steel load cells.
All Paramounts load cell kits use SB, SB10 and SB5
load cells with outputs matched to ±.07%. This
eliminates corner trimming at initial installation or
recalibration when a load cell is replaced.
5. Withstands Hostile Environments: Paramounts HS
are available in mild steel or stainless steel with
hermetically sealed stainless steel load cells.
Paramounts EP models come standard with
stainless steel, environmentally protected load cells.
6. Available in capacities to 22,250 lb in either mild
steel or stainless steel.
Figure 14-14. Paramounts Mounting System on Cylindrical
Tank
a b c
FREE
FREE
SIDE FIXED
FREE FREE