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Geokon 4050 Manuals
Manuals and User Guides for Geokon 4050. We have
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Geokon 4050 manuals available for free PDF download: Instruction Manual
Geokon 4050 Instruction Manual (46 pages)
Vibrating Wire Strain Gauges
Brand:
Geokon
| Category:
Accessories
| Size: 2.09 MB
Table of Contents
Table of Contents
5
1 Introduction
11
Figure 1: Model 4000 Vibrating Wire Strain Gauge
11
2 Preliminary Checks
12
3 Gauge Installation
13
Connecting the Mounting Blocks
13
Installation on Steel Surfaces
13
Welding
13
Figure 2: Spacing Jig
13
Figure 3: Welding Sequence for the Mounting Blocks
13
Installation on Driven Steel Piles
14
Figure 4: Protection on Driven Piles
14
Installation Using Epoxy Cements
15
Concrete Surfaces
15
Figure 5: Installation Using Epoxy
15
Steel Surfaces
16
Installing on Concrete Surfaces Using Anchor Studs
16
Figure 6: Installation on Concrete Using Groutable Anchors
16
Setting the Strain Gauge
17
4 Gauge Protection
18
Protection from Mechanical Damage Using Geokon Model 4000-6
18
Figure 7: Cover Plate Installation, Top View
18
Figure 8: Cover Plate Installation, Side View
18
Protection from Direct Sunlight and Rapid Changes in Ambient Temperature
19
Cable and Connector Protection
19
Cable Splicing and Termination
19
Protection from Corrosion
19
Lightning Protection
19
Figure 9: Lightning Protection Scheme
20
5 Gauge Location
21
End Effects
21
Welding Effects
21
Bending Moments
21
Figure 10: Strain Gauges Mounted on Central Web
21
Equation 1: Axial Stress Calculation
22
Equation 2: Stress Due to Bending on Axis Yy
22
Equation 3: Stress Due to Bending on Axis XX
22
Equation 4: Maximum Stress
22
Figure 11: Strain Gauges Mounted on Flanges
23
Figure 12: Axial Strain Measurement/Bending Moment about Yy Axis
23
Figure 13: Axial Strain and Bending Moments about XX Axis
24
Figure 14: Axial Strain and Bending Moment about Axis
24
6 Taking Readings
25
Strain Gauge Readout Positions
25
Gk-404 Readout Box
25
Operating the Gk-404
25
Figure 15: Gk-404 Readout
25
Figure 16: Lemo Connector to Gk-404
25
Table 1: Strain Gauge Readout Positions
25
Gk-405 Readout Box
26
Connecting Sensors with 10-Pin Bulkhead Connectors Attached
26
Connecting Sensors with 10-Pin Bulkhead Connectors
26
Figure 17: Gk-405 Readout
26
Connecting Sensors with Bare Leads
27
Operating the Gk-405
27
Gk-403 Readout Box (Obsolete Model)
27
Attached
27
Operating the Gk-403
27
Measuring Temperatures
27
7 Data Reduction
29
Conversion of the Readings to Strain Changes
29
Converting Strains to Stresses
29
Equation 5: Theoretical Microstrain
29
Equation 6: Strain Calculation
29
8 Troubleshooting
30
Table 2: Sample Resistance
31
Table 3: Resistance Work Sheet
31
Appendix A. Specifications
33
Vibrating Wire Strain Gauge
33
Thermistor
33
4000-4 Mounting Blocks
33
Table 4: Specifications
33
Appendix B. Theory of Operation
34
Appendix C. Thermistor Temperature Derivation
36
Table 5: Thermistor Resistance Versus Temperature
36
Equation 7: Resistance to Temperature
36
Appendix D. Model 4050 Special Instructions
37
Figure 18: Model 4050 Vibrating Wire Strain Gauge
37
Equation 8: Reading to Microstrain
37
Equation 9: Gauge-Only Temperature Effects
37
Appendix E. Temperature Effects
38
Equation 10: Temperature-Induced Stress
38
Equation 11: Apparent Stress
38
Equation 12: Load-Related Stress
38
Equation 13: Actual Strain
38
Appendix F. Temperature Correction When Used on Concrete
39
Equation 14: Thermal Concrete Strains
39
Equation 15: Actual Strain
39
Equation 16: Strain Due to Load Changes Only
39
Appendix G. Calculations from Three Strain Gauges, at 60 Degrees, on a Circular Pipe
40
Figure 19: Three Strain Gauges Mounted on a Circular Pipe Diagram
40
Equation 17: Average Axial Strain
40
Equation 18: Maximum Bending Strain Around the Yy Axis
40
Equation 19: Maximum Bending Strain Around the XX Axis
40
Equation 20: Maximum Strain
40
Appendix H. Two Strain Gauges Mounted One above the Other
41
Figure 20: Two Strain Gauges Mounted One above the Other
41
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Geokon 4050 Instruction Manual (32 pages)
vibrating wire strain gage
Brand:
Geokon
| Category:
Measuring Instruments
| Size: 0.4 MB
Table of Contents
Table of Contents
5
1 Introduction
7
2 Gage Installation -General
8
Preliminary Tests
8
Arc Welding the Mounting Blocks to Steel Surfaces - Using the Spacer Bar
8
Arc Welding Sequence
9
Setting the Strain Gage
9
Initial Readings
10
3 Gage Protection
10
Protection from Corrosion
10
Protection from Direct Sunlight and Rapid Changes in Ambient Temperature
10
Protection from Mechanical Damage
10
Cable and Connector Protection
11
Lightning Protection
12
4 Gage Location
13
End Effects
13
Welding Effects
13
Bending Moments
13
5 Special Applications
17
Installation on Driven Steel Piles
17
Installation on Steel or Concrete Surfaces Using Epoxy Cements
18
Concrete Surfaces
18
Steel Surfaces
18
Installation on Concrete Surfaces Using Anchor Studs
19
6 Taking Readings
19
Operation of the Gk-403 Readout Box
20
Operation of the Gk-404 Readout Box
20
Operation of the Gk-405 Readout Box
21
Measuring Temperatures
21
7 Data Interpretation
22
Conversion of the Readings to Strain Changes
22
Converting Strains to Stresses
22
8 Troubleshooting
23
Appendix A - Specifications
24
Thermistor ( See Appendix Calso )
24
Appendix B - Theory of Operation
25
Appendix C - Thermistor Temperature Derivation
27
Appendix D - Model 4050 Special Instructions (12" Gage Length)
28
Appendix E - Measurement Of, and Correction For, Temperature Effects
29
Appendix F - Temperature Correction When Used on Concrete
30
Appendix G - Calculation of Axial Loads and Bending Strains from Three Strain Gages, at 60 Degrees, on a Circular Pipe
31
Appendix H - Two Strain Gages Mounted One above the Other
32
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