Kistler-Morse KM LD360s - Manual (Page 7)

Chapter 1:
Description of the Load Disc
This chapter describes the Load Disc Compression Load Cell
and its installation options.
Introduction
General Description of Measurement System
The deflection of the Load Disc load cell by the vessel weight is measured by
the semiconductor sensor, which is entirely sealed within the watertight cavity
of the transducer. The sensor converts the deflection into an electrical signal
which is directly proportional to the increase or decrease of the vessel
contents. Material movement and changes in material repose will not affect
the accuracy of the system. Accurate weight information is then sent to a
signal processor for display, information transmission and storage (See Figure
1-2).
Figure 1-1:
Load Disc Compression Load
Cell with optional NEMA-6P
cable system
The Load Disc is a low profile load cell that is bolted to both the support
surface and the vessel supports, and is used to measure the weight of materials
in vessels and tanks. The sealed, stainless steel construction–NEMA-6P rated
unit with watertight cable system and cable entry–makes the Load Disc ideal
for use in high-pressure wash down and occasionally submerged environ-
ments.
The low-profile design for low clearance installations also keeps the vessel’s
center of gravity low and stable. Vessel tipping, walking or overturning while
agitating is eliminated. Installation and setup is simplified with less hardware.
No external vessel hold-downs are necessary, even in areas of high wind or
seismic activity. There are no moving parts that can wear out or require
replacement. The high output of the semiconductor sensor allows immunity to
industrial electrical noise and longer “load cell to signal processor” runs.
Applications Description
The watertight design of the Load Disc load cell makes it ideal for measuring
bulk material in the sanitary and clean-in-place environments. It is particu-
larly suitable for use on mixing and blending vessels, surge hoppers, and
agitated vessels. Rugged, solid, bolt-in-place mounting assures vessel
stability in outdoor storage vessels with gussets or legs used in all process
industries.
weight/4
weight/4
weight/4 weight/4
Load Disc
(x4)
signal
processor
junction box
Signal
transmission/
Serial Output
Setpoints for
signaling a change
in staus, such as
high and low
alarms
Figure 1-2:
General installation layout for Load Disc
using a junction box.
Chapter 1: Description of the Load Disc
1-1