Rice Lake Z6 Single-Ended Beam, SS Welded-seal, IP67, OIML C3 - Manual (Page 28)

24 Load Cell and Weigh Module Handbook
Figure 14-8. RL1800 and 1855 HE Modules on Horizontal
Cylindrical Tank
14.7 SURVIVOR
®
1855HE Modules
These modules use single-ended stainless steel welded beam
load cells in center-pivoted modules with capacities up to
10,000 lb per module. Load cells are NTEP-certified, 1:5000
divisions Class III load cells.
While these are compression-style modules, the cell is actually
mounted in tension since the load is introduced through a
center loading bolt in a hanging trunnion suspended beneath
the load cell. The trunnion can pivot in all directions on a set
of spherical washers, allowing the top plate (attached to the
v e s s e l ) t o ro c k w i t h o u t t w i s t i n g t h e l o a d c e l l . T h i s
arrangement makes the modules self-centering, and able to
accommodate movement in all directions. This module is
self-checking and provides lift-off protection.
The 1855HE modules allow the installer to adjust overall
height easily with the center loading bolt that is attached to
the hanging trunnion. This adjustment feature speeds the
process of equalizing the load between all modules. These
modules allow load cell removal and replacement without
raising the tank—an important consideration in some
installations. See Figure 14-8.
Allowable Movement
Figure 14-9 illustrates the 1855HE module with arrows
indication allowable movement.
Figure 14-9. SURVIVOR 1855HE
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 cell and is attached to the cell using a bolt in
tension which is screwed into a threaded load hole.
A spherical washer set is placed between the bolt
head and block.
3. A chair arrangement is attached to the trunnion
block through pivot screws, and the load is applied
to the top plate of this chair. This arrangement
allows the chair to move in the directions indicated
in Figure 14-9.
4. 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.
5. The module provides lift-off protection and lateral
restraint.
6. The module provides height adjustment.
7. Hermetically sealed stainless steel load cells are
guaranteed against moisture damage.
8. The 1855HE module is available in capacities from
1000 lb-10,000 lb in stainless steel.
9. A PTFE-jacketed cable and integral conduit adapter
heighten chemical and moisture resistance.

Loading
Bolt