Rice Lake Weigh Modules/Mount Assemblies - Manual (Page 36)

2-7
WEIGH MODULES Single-Ended Beams
RL1900 Modules
The RL1900 module is similar in design to the RL1800, but
accommodates slightly more lateral movement than the RL1800.
Allowable Movement
Figure 2-11: RL1900 Module
Construction and Features
1) A base plate and spacer support the load cell.
2) A trunnion block is suspended below the free end of the load
cell. It is attached to the load cell using a bolt which passes
through the clearance load hole and is retained by a nut at the
top of the cell. Two spherical washer sets are used; one sits
between the bolt head and trunnion block, the other sits
between the nut and the top of the load cell (which is
counterbored to accept the washer set).
3) A chair arrangement is attached to the trunnion block through
pivot screws; the load is applied to the top plate of this chair.
This arrangement allows the chair to move in the directions
indicated in Figure 2-11.
4) This module allows greater lateral movement than the RL1800
by virtue of the fact that the suspension bolt passes through
a clearance load hole in the cell and has spherical washer sets
at the top and bottom.
5) Because the load is suspended from the underside of the cell,
the module is self-centering; that is, after a disturbance
temporarily moves the top plate laterally, it will tend to return
to its original position under the influence of gravity.
6) The module provides lift-off protection and lateral restraint.
7) The module provides height adjustment.
8) The RL1900 module is available in capacities from 1,000 lb to
10,000 lb in 304 stainless steel.
9) This module can accommodate both environmentally-pro-
tected and hermetically-sealed load cells—the HBM SB3 and
the RTI SSB, respectively.
Typical Installation
Figure 2-12: RL1900 modules on hopper scale