PCB Load & Torque, Inc.
Toll-Free in USA 866-684-7107
716-684-0001
www.pcbloadtorque.com
GENERAL PURPOSE LOW PROFILE LOAD CELL OPERATION MANUAL
3
3.2 Standard Components
The following figure describes the standard components of the
general purpose low profile load cells.
3.3 Optional Components
The following figure describes the optional components of the
general purpose low profile load cells.
NOTE: Connector protectors are standard on 8” and 11”
models.
Table 3 describes the available optional components
NOTE: Pre-tension studs include the threaded stud and the
jam nut.
NOTE: The use of the tension base greatly increases the
performance of the low profile load cell.
4.0 MECHANICAL INSTALLATION
The following mechanical installation instructions should be
observed if optional components are to be used.
4.1 Mounting Bases
All low-profile load cells are calibrated with a factory
installed standard mounting base. An optional custom
(customer supplied) mounting base can, with special
arrangements, be installed and used for calibration.
However, there will be an extra charge for the installation of
the load cell on the customer’s base / fixture.
NOTE: To insure catalog performance specifications are met
the customer’s supplied fixture or base must be flat to
within 0.0002 inch and provide similar stiffness and
hardness to a factory base.
Unless otherwise specified/requested, the load cell is
calibrated with a factory installed mounting base. It is
important to note that the performance of the load cell may
be affected if the mounting base is not used or modified.
4.2 Mounting Load Cell to a Standard Base or
Custom Fixture
If the load cell is to be mounted to a custom base or fixture, it
is necessary to consider the following:
1.
The thickness of the new base or fixture must not be
any thinner than the original base supplied with the
load cell. Materials used must have the same
temperature coefficient of expansion (for example,
4140 Steel).
2.
The mounting surface must be flat (within 0.0002
inches), and steel fixtures must have a hardness of
Rockwell C 38 to 42.
3.
The threaded holes and under-head of the fasteners
must be lightly lubricated with 30 weight oil or
equivalent prior to tightening the mounting bolts.
4.
Refer to Table 4 for the final tightening torque
required for each bolt size.
5.
Tighten the bolts in an incremental cross pattern with
the following sequence: start with all bolts finger
tight followed by 25%, 50% and finally 100% of the
required torque being applied.
Tension
Base
Connector
Protector
Pre-Tension
Stud
Pre-Tension
Stud
Jam Nut
Jam Nut
Load Cell
Connector
Figure 2
– Standard Components
Figure 3
– Optional Components
Item Number
Item Description
084A40
Lifting Rings (side), 1211/1411 Series
084A41
Lifting Plug (top), 1211/1411 Series
084A55
Pre-Tension Stud (5/8”-18 Thread), 1203/1403 Series
084A56
Pre-Tension Stud (1 ¼”-12 Thread), 1204/1404 Series
084A57
Pre-Tension Stud (1 ¾”-12 Thread), 1208/1408 Series
084A58
Pre-Tension Stud (2 ¾”-8 Thread), 1211/1411 Series
084A59
Pre-Tension Stud (2 ¾”-8 to 1 ¾”-12 Thread) 1211/1411 Series
084A90
Connector Protector, 1403 and 1404 Series
084A100
Tension Base (5/8”-18 Thread) 1203/1403 Series
084A101
Tension Base (1 ¼”-12 Thread) 1204/1404 Series
084A103
Tension Base (1 ¾” -12 Thread) 1208/1408 Series
084A104
Tension Base (2 ¾” -8 Thread) 1211/1411 Series
Table 3
– Optional Components