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Geokon 4200L Manuals
Manuals and User Guides for Geokon 4200L. We have
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Geokon 4200L manuals available for free PDF download: Instruction Manual
Geokon 4200L Instruction Manual (44 pages)
Vibrating Wire Strain Gauges
Brand:
Geokon
| Category:
Security Sensors
| Size: 2.65 MB
Table of Contents
Table of Contents
5
1 Introduction
11
Figure 1: On-Site Installation Photo
11
2 Models
12
Models 4200 and 4200L
12
Figure 2: Model 4200 Vibrating Wire Strain Gauge
12
Figure 3: Model 4200L Vibrating Wire Strain Gauge
12
Table 1: Heat Shrink Color Designations
12
Models 4200-6 and 4200-7
13
Model 4202
13
Figure 4: Model 4200-6 Vibrating Wire Strain Gauge
13
Figure 5: Model 4200-7 Vibrating Wire Strain Gauge
13
Figure 6: Model 4202 Vibrating Wire Strain Gauge
13
Model 4210
14
Figure 7: Model 4210 Vibrating Wire Strain Gauge
14
3 Prior to Installation
15
Adjusting Gauge to the Desired Range
15
Gauge and Cable Assembly
15
Preliminary Check
15
Figure 8: Adjusting the Range of the Strain Gauge
15
Figure 9: Assembled Strain Gauge and Coil Housing
15
4 Installing the Gauges in Concrete
17
Direct Attachment to Rebar
17
Suspension Method
17
Figure 10: Attaching Gauges to Rebar
17
Alternative Suspension Method
18
Figure 11: Suspending Strain Gauges between Rebar
18
Figure 12: Alternative Method for Attaching Gauges to Rebar
18
Using Pre-Cast Briquettes, Shotcrete, or Grouting
19
Cable Splicing and Termination
19
Lightning Protection
19
Figure 13: Lightning Protection Scheme
20
5 Taking Readings
21
Micro-6000 Datalogger
21
Embedment Strain Gauge Readout Positions
21
Gk-404 Readout Box
21
Table 2: Embedment Strain Gauge Datalogger Parameters
21
Table 3: Readout Positions
21
Operating the Gk-404
22
Gk-405 Readout Box
22
Figure 14: Gk-404 Readout
22
Figure 15: Lemo Connector to Gk-404
22
Connecting Sensors with 10-Pin Bulkhead Connectors
23
Attached
23
Connecting Sensors with Bare Leads
23
Figure 16: Gk-405 Readout
23
Operating the Gk-405
23
Gk-403 Readout Box (Obsolete Model)
24
Connecting Sensors with 10-Pin Bulkhead Connectors
24
Attached
24
Connecting Sensors with Bare Leads
24
Operating the Gk-403
24
Measuring Temperatures
24
6 Data Reduction
25
Readout Box Position a
25
Readout Box Position B
25
Readout Box Positions D & E
25
Table 4: Embedment Strain Gauge Factors
25
Equation 1: Period to Digits Conversion
25
Equation 2: Theoretical Strain
25
Equation 3: Apparent Strain
25
Table 5: Strain Resolution
26
Equation 4: Correction for Temperature Effects on the Gauge
26
Equation 5: True, Load-Related Strain Corrected for Temperature
26
Equation 6: Actual Strain
27
Model 4200-6 / 4200-7 Corrections
27
Table 6: Effective Modulus
28
Equation 7: Strain to Load Formula
28
Effect of Autogenous Growth
28
7 Troubleshooting
29
Table 7: Resistance Work Sheet
30
Table 8: Sample Resistance
30
Appendix A. Specifications
31
Figure 18: Model 4200Ht-T
31
Table 9: Strain Gauge Specifications
31
Appendix B. Theory of Operation
32
Table 10: Embedment Strain Gauge Theoretical Parameters
32
Table 11: Thermistor Resistance Versus Temperature
34
Equation 8: Resistance to Temperature
34
Appendix C. Thermistor Temperature Derivation
34
Appendix D. High-Temperature Thermistor Linearization
35
Table 12: Thermistor Resistance Versus Temperature for Model
35
Equation 9: High-Temperature Resistance to Temperature
35
Figure 17: no Stress Strain Enclosure
36
Gauge
38
Appendix E. no Stress Strain Enclosure
39
Appendix F. Model 4200Ht-T High-Temperature Strain
39
Appendix G. Measurement and Correction of Temperature Effects
39
Equation 10: Temperature-Induced Stress
39
Equation 11: Combined Temperature and Load-Related Stress
39
Equation 12: External Load Stress
39
Equation 13: Actual Strain
39
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Geokon 4200L Instruction Manual (37 pages)
Vibrating wire strain gages
Brand:
Geokon
| Category:
Measuring Instruments
| Size: 1.42 MB
Table of Contents
Table of Contents
5
Introduction
7
Figure 1 - O Nsite Installation Photo
7
Models
8
Models 4200 and 4200L
8
Figure 2 - Model 4200 and 4200L Vibrating Wire Strain Gage
8
Table 1 - Heat Shrink Color Designations
8
Model 4202
9
Model 4210
9
Figure 3 - Model 4202 Vibrating Wire Strain Gage
9
Figure 4 - Model 4210 Vibrating Wire Strain Gage
9
Prior to Installation
10
Adjusting Model 4200 to the Desired Range
10
Gage and Cable Assembly
10
Figure 5 - Adjusting Wire Tension
10
Figure 6 - Assembled Gage and Coil Housing
10
Preliminary Check
11
Installing the Gages in Concrete
11
Direct Attachment to Rebar
12
Figure 7 - Attaching Model 4200/4200L/4200Ht Strain Gages to Rebar
12
Suspension Method
13
Figure 8 - Suspending Model 4200/4200L/4 200Ht Strain Gages between Rebar
13
Alternative Suspension Method
14
Using Precast Briquettes, Shotcrete, or Grouting
14
Figure 9 - Alternative Method for Attaching Model 4200/4200Ht Strain Gages to Rebar
14
Cable Splicing and Termination
15
Lightning Protection
15
Figure 10 - Lightning Protection Scheme
16
Taking Readings
17
Gk-404 Readout Box
17
Operating the GK-404
17
Figure 11 - Lemo Connector to Gk-404
17
Gk-405 Readout Box
18
Connecting Sensors
18
Operating the GK-405
18
GK-403 Readout Box (Obsolete Model)
19
Connecting Sensors
19
Operating the GK-403
19
Embedment Strain Gage Readout Positions
19
Table 2 - Readout Positions
19
Measuring Temperatures
20
Data Reduction
21
Readout Box Positiona
21
Readout Box Positionb
21
Table 3 - Embedment Strain Gage Factors
21
Equation 1 - Period to Digits Conversion
21
Readout Box Positionsd & E
22
Strain Resolution
22
Temperature Corrections
22
Equation 2 - Theoretical Strain
22
Equation 3 - Apparent Strain
22
Equation 4 - Correction for Temperature Effects on the Gage
23
Equation 5 - True , Load Related Strain Corrected for Temperature
23
Shrinkage Effects
24
Equation 6 - Actual Strain
24
Creep Effects
25
Effect of Autogenous Growth
25
Converting Strain to Load
25
Effective Modulus
25
Table 4 - Effective Modulus
25
Equation 7 - Strain to Load Formula
25
Troubleshooting
26
Table 5 - Sample Resistance
27
Table 6 - Resistance Work Sheet
27
Appendix A. Specifications
28
Thermistor
28
Strain Gage
28
Table 7 - Strain Gage Specifications
28
Appendix B. Theory of Operation
29
Table 8 - Embedment Strain Gage Theoretical Parameters
29
Appendix C. Thermistor Temperature Derivation
32
Table 9 - Thermistor Resistance Versus Temperature
32
Equation 8 - Resistance to Temperature
32
Appendix D. High Temperature Thermistor Linearization
33
Table 10- Thermistor Resistance Versus Temperature for Model 4200Ht
33
Equation 9 - High Temperature Resistance to Temperature
33
Appendix E. no Stress-Strain Enclosure
34
Figure 12 - N Ostress Strain Enclosure
34
Appendix F. Model 4200Ht-T High Temperature Strain Gage
35
Figure 13 - Model 4200Ht-T
35
Appendix G. Measurement and Correction of Temperature Effects
36
Equation 10 - Temperature Induced Stress
36
Equation 11 - Combined Temperature and Load Related Stress
36
Equation 12 - External Load Stress
36
Equation 13 - Actual Strain
37
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