Rice Lake Z6 Single-Ended Beam, SS Welded-seal, IP67, OIML C3 - Manual (Page 35)

Weigh Modules: Double-Ended Beam 31
Allowable Movement
Figure 15-9.
Construction and Features
1. A bridge is welded to a base plate. The bridge can
accommodate a hardened convex or concave insert
on which the load cell sits. Two roll pins prevent the
cell from sliding sideways.
2. A forged link hangs from each end of the load cell,
and they support a heat-treated load bar which
passes under the bridge. The load bar has circular
grooves (corresponding to the loading grooves in the
load cell) in which the links sit, and the top chair sits
on each end of the load bar.
3. This arrangement allows movement in all horizontal
directions, as shown in Figure 15-9.
4. This module has a pendulous action which tends to
return the deck to its original position after it has been
disturbed longitudinally or laterally.
5. This module is ideally to suited vehicle scales or
high-capacity vessel scales.
6. This module requires the scale to be checked in the
horizontal plane. Stay rods may be used or, because
of the self-centering action, bumper bolts are also
sufficient. It does not provide lift-off protection which
must be provided externally if required on a vessel
scale.
7. The Translink module is available in mild steel for the
RL75040 or Sensortronics 65040 in capacities from
23,000 lb to 75,000 lb, and the RL75223 and RTI
5223 in capacities from 50,000 lb to 100,000 lb.
Typical Application
Figure 15-10.
15.6 MVS Truck Scale Modules
The MVS load cell module is used primarily for truck scales,
and in certain applications for vessel-weighing applications.
The modules are constructed of cast iron, and are available in
load cell capacities from 10,000 lb to 75,000 lb. The center-
link design provides freedom of movement in the longitudinal
direction while also self-centering, making this module ideal
for vehicle scales.
Unlike the double-ended beams used for the RL1600 or EZ
Mount 1, the MVS module should be mounted with the
greatest expected movement aligned with the longitudinal axis
of the load cell. In a truck scale, this is normally in the
direction of truck travel.
Construction and Features
1. The load cell ends are screwed to a rigid U-shaped
base plate.
2. A link sits over the center of the cell which has a
radiused groove at the center. The bottom of this
link has two saddle blocks which project outwards.
The top girder chair assembly sits on these ears.
3. The module is free to move.
4. Because the load is suspended by a link, the scale is
free to rock back and forth along the longitudinal axis
of the load cell. Because of the pendulous action of
the link, the scale will return to its original position
after being displaced along the longitudinal axis of
the cell.
5. When a number of modules are fastened to a deck,
the modules are restrained from rocking laterally.
6. A scale using this module must be checked along
the longitudinal axis of the load cell to prevent
over-travel. Stay rods or bumper bolts may be used.
7. The module does not provide lift-off protection
which, if required in a vessel weighing application,
must be provided externally.
8. The mild steel MVS modules use the RL75058
double-ended shear beam load cell, which is made of
high alloy steel.
Section A-A
A
A