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3
3.1
3.2
3.3
18
Installation
General
The equipment is a precision instrument which, although intended for severe operating conditions,
must be handled with care. The load cells should not be unpacked until it is time for installation.
To achieve the specified accuracy, the best possible reliability and long-term stability, the load cells
must be installed in accordance with the instructions below. See also
Mechanical
Installation.
•
The foundation for the load cell must be made as stable as possible. A resilient stand lowers
the critical frequency of the measuring roll and bearing arrangement.
•
The surfaces closest to the load cell, and other surfaces that affect the fit, must be machined
flat to within 0.05 mm.
•
There must not be any shims immediately above or below the load cell, as this may
adversely affect the flatness. Instead, shims may be placed between the adapter plate and
the foundation or between the adapter plate and the bearing housing.
•
The screws that secure the load cell must be tightened with a torque wrench.
•
The bearing arrangement for the measuring roll must be designed to allow axial expansion of
the roll with changes in temperature.
•
Any drive to the roll must be applied in such a way that interfering forces from the drive are
kept to a minimum.
•
The measuring roll must be dynamically balanced.
•
The mounting surfaces of the load cells must be on the same height and parallel with the
measuring roll.
•
In a corrosive environment, galvanic corrosion may occur between the load cell,
galvanized screws and adapter plates. This makes it necessary to use stainless steel screws
and adapter plates of stainless steel or equivalent. See adapter plates in
A
Drawings.
Unpacking
When the equipment arrives, check against the delivery document. Inform ABB of any complaint,
so that errors can be corrected immediately and delays avoided.
Preparations
Prepare the installation in good time by checking that the necessary documents and material are
available, as follows:
•
Installation drawings and this manual.
•
Standard tools, torque wrench and instruments.
•
Rust protection, if additional protection is to be given to machined surfaces. Choose TEC-
TYL 511 (Valvoline) or FERRYL (104), for example.
•
Load cells, adapter plates, bearing housings, etc.
Pressductor PillowBlock Load Cells, Vertical Measuring PFCL 201, User Manual
3 Installation
6.4 Fault Tracing in the
3BSE023881R0101 en Rev H
- Quick Links:
- Load Cells Pfcl 201
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