TABLE of CONTENTS
Extended Range
......................................................................................................1
Vibrating Wire Strain Gage
...............................................................................1
1. INTRODUCTION ......................................................................................................1
2. GAGE INSTALLATION ...........................................................................................2
2.1. Adjusting the Desired Range .......................................................................2
2.2. Placing the Gage in Concrete .......................................................................3
2.3. Using Pre-cast Briquettes or Grouting .........................................................5
2.4. Cable Protection and Termination ...............................................................5
2.5. Lightning Protection ....................................................................................5
3. TAKING READINGS ................................................................................................7
3.1. Operation of the GK-403 Readout Box .......................................................7
3.2. Operation of the GK-404 Readout Box .......................................................7
3.3. Operation of the GK-405 Readout Box .......................................................8
3.4. MICRO-6000 Datalogger ............................................................................9
3.5. Measuring Temperatures ............................................................................9
4.DATA REDUCTION FOR THE GK-403, GK-404 or GK-405 in POSITION D ......10
4.1. Conversion of Readings to Strain Changes .................................................10
4.2. Temperature Corrections .............................................................................11
4.3. Shrinkage Effects .........................................................................................12
4.4. Creep Effects ................................................................................................12
4.5. Effect of Autogenous Growth ......................................................................12
5. TROUBLESHOOTING ..............................................................................................13
APPENDIX A - SPECIFICATIONS ...............................................................................14
A.1 4200ER Strain Gage......................................................................................14
A.2 Thermistor (see Appendix C also) ................................................................14
APPENDIX B - THERMISTOR TEMPERATURE DERIVATION .............................15
APPENDIX C - HIGH-TEMPERATURE THERMISTOR LINEARIZATION ............16
