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Micro-Measurements Hands-on Workshop covering Strain Gage Applications on Printed Circuit Boards (2 day)

In this comprehensive, hands-on Workshop, participants make several complete strain gage (strain gauge) installations, including electrical connections, check-out, and environmental protection; and use appropriate readout instrumentation to verify results of their own installations. In addition to these fundamentals, one of the hands-on installations will involve correct installation of a strain gage rosette on a printed circuit board per IPC/JDEC 9704A specifications. Data acquisition and analysis topics will also be covered.

Topics include:

Strain Gage (Strain Gauge) Characteristics

  • Gage Factor
  • Temperature Compensation
  • Sensing Alloys
  • Transverse Sensitivity
  • Strain Limits
  • Fatigue Endurance
Installation Techniques
  • Surface Preparation
  • Adhesive Selection
  • Gage Installation Procedures and Check-Out
  • Leadwire Attachment and Soldering Techniques
  • Protective Coatings
Gage Installations with Epoxy, Epoxy-Phenolic, and Cyanoacrylate Adhesives
  • Room-Temperature Installation of CEA gage on Aluminum
  • Room-Temperature Installation of C2A stacked rosette on PCB material
  • Clamping Techniques
  • Leadwire Attachment
  • Protective Coatings
  • Measuring Strain Level
Discussion of Special Gage Installation Techniques for Measurement Over Wide Temperature Ranges
  • Gage Selection
  • Gage Performance Characteristics
  • Temperature Effects
  • Leadwire Selection and Attachment
  • Protective Coating Systems
Strain Gage (Strain Gauge) Circuitry
  • Quarter, Half and Full Bridges
  • Leadwire Compensation
Bridge Excitation
  • Power Levels
  • Self-Heating
Rosette Data Reduction
  • Measurement and data analysis of stacked rosette on PCB including:
    • Maximum Principal Strain
    • Minimum Principal Strain
    • Direction
    • Strain Rate
  • High Speed Data Acquisition — Pacific Instruments