User guide

Chapter 2. Pre-Installation
2-4
An independent, isolated vessel with no connection to any other vessel
or adjacent structure provides the most accurate results for a weight
measurement system. Examples of this type of application are floor scales
and truck scales. Connections to other vessels or structures affect
accuracy because the transducers interpret strain changes caused by the
connecting structures as being caused by changes in the material weight.
Factors that affect Performance
Some typical causes of error related to
connecting structures and, where applicable,
methods for reducing the errors follow:
• Catwalk
• Hidden load bearing members
• Vessel goes through roof
• Tripper conveyors or deck plating
• Rigid piping connection between vessel and
another adjacent structure
• Poor Foundation
• Flexible Structure
• Uneven Loading
Figure 2-1:
Examples of typical causes of error.
Horizontal run length is ok for
cross-sectional area of pipe
Flex coupling
No horizontal run
Flex
No horizontal run
Horizontal run too short for cross-
sectional area of pipe