Chapter 2
Mode l8500C/8500C+ Operators Manual
2-1
2.
Overview and Basic Theory
The Model8500C/C+ Balancer/Analyzer contains a number of different components. This chap te
gives you summaries of what they are and how they operat e. Chapter2 provides a general system
overview and the 8500C/C+’s basic theory, under the following topics:
Section 2.1 About the Mod el8500C/C+..............................................................................2-1
Section 2.2 Theory of Operation..........................................................................................2-2
Section 2.3 System Architecture...........................................................................................2-10
2.1 About the Model 8 5 00C/C+
The 8500C/C+ is a portable, microprocessor-based instrument specifically designed for the acquisition
and analysis of rotor system vibration data. It is intended for use with systems such as helicopters and
airplane propellers, where the identification and suppression of rotor vibrations are essential to correct
performance and maintenance. The unit incorporates state-of-the-art digital technology in its design.
The result is a family of instruments that achieves a high level of performance and is at the same time
both versatile and easy to use.
The 8500C/C+ supports a broad range of functions that provide for sophisticated and detailed analyses
of target rotor systems. For example, the 8500C/C+ may be used as an analyzer to
• Perform on-site maintenance through vibration trend analysis
• Generate documentation both before and after maintenance
• Display and record vibration profiles of new or overhauled aircraft
You may also use the 8500C/C+ as a balancer/tracker to
• Track and balance helicopter main and tail rotors
• Balance propellers
• Balance shafts and blowers
• Balance high-bypass jet fans
• Perform all balancing and tracking on the aircraft
In addition, the 8500C/C+ provides for
• Hard-copy reproductions of graphics, text, and dat
• Floppy disk storage for software balance charts, spectral setups, and data
For a detailed functional description of the 8500C/C+ system, see t he Model8500C/C+ System
Maintenance Manual.
NOTE: For part numbers of all 8500C/C+ parts and/or other order information, see the
Mode l8500C/C+ System Maintenance Manual.
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