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4200-7
Geokon 4200-7 Manuals
Manuals and User Guides for Geokon 4200-7. We have
1
Geokon 4200-7 manual available for free PDF download: Instruction Manual
Geokon 4200-7 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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