Geokon A9 Instruction Manual

Retrievable extensometer

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Instruction Manual
Model 1300
(Model A9)
Retrievable Extensometer
No part of this instruction manual may be reproduced, by any means, without the written consent of Geokon, Inc.
The information contained herein is believed to be accurate and reliable. However, Geokon, Inc. assumes no
responsibility for errors, omissions or misinterpretation. The information herein is subject to change without
notification.
Copyright © 1995-2016 by Geokon, Inc.
(Doc. REV H. 11/10/16)

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Summarization of Contents

1. INTRODUCTION
1.1. THEORY OF OPERATION
Explains the working principle of the extensometer system.
2. INSTALLATION
2.1. PRELIMINARY TESTS
Checks for transducer operation and electrical continuity before assembly.
2.2. EXTENSOMETER INSTALLATION
Details the steps for assembling and installing the extensometer in the borehole.
2.3. CABLE SPLICING
Instructions on how to splice and waterproof transducer cables.
2.4. INITIAL READINGS
Importance of taking accurate initial readings and noting conditions.
2.5. ELECTRICAL NOISE
Guidance on minimizing electrical interference during installation.
3. TAKING READINGS
3.1. OPERATION OF THE GK-401 READOUT BOX
How to use the GK-401 readout for measurements.
3.2. OPERATION OF THE GK-403 READOUT BOX
How to use the GK-403 readout for measurements and data storage.
3.3. OPERATION OF THE GK404 READOUT BOX
How to use the GK404 readout for measurements and temperature.
3.4. MEASURING TEMPERATURES
How to measure temperature using the thermistor.
4. DATA REDUCTION
4.1 DIGITS
Explanation of measurement units ("digits") and calculation.
4.2. TEMPERATURE CORRECTION
How to correct deformation measurements for temperature effects.
5. TROUBLESHOOTING
Symptom: Transducer Readings are Unstable
Solutions for unstable transducer readings.
Symptom: Transducer Fails to Read
Solutions when the transducer does not provide a reading.
Sympton: Transducer will not hold pressure
Troubleshooting steps for pressure holding issues.
APPENDIX A - SPECIFICATIONS
A.1. Model A-9 Retrievable Extensometer Transducer
Lists the technical specifications for the Model A-9 transducer.
A.2 Thermistor
Specifies the range and accuracy of the thermistor.
APPENDIX B - THERMISTOR TEMPERATURE DERIVATION
Resistance to Temperature Equation:
Provides the equation to convert thermistor resistance to temperature.
Table B-1 Thermistor Resistance versus Temperature
A table correlating thermistor resistance values with temperatures.
APPENDIX C - ANCHOR PULL OUT TEST RESULTS
Figure C-1 Anchor Pull Out Test Results
A chart showing anchor pull-out test results against applied pressure.
APPENDIX D - SWAGELOK FITTING ASSEMBLY INSTRUCTIONS
INSTALLATION INSTRUCTIONS
Step-by-step guide for assembling Swagelok tube fittings.
RE-TIGHTENING INSTRUCTIONS
Procedures for re-tightening Swagelok fittings.
GAP INSPECTION GAGES
How to use gap inspection gages for fitting verification.
PRE-SWAGING INSTRUCTIONS
Instructions for pre-swaging Swagelok ferrules onto tubing.
SWAGELOK Hydraulic Swaging Unit
Details about the hydraulic swaging unit for fittings.

Table of Contents