Geokon 4410 Instruction Manual Download Page 11 | Manualshive

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Geokon 4410 Instruction Manual Download Page 11

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Plasma surge arrestors can be epoxy potted into the gage cable close to the sensor. A ground
strap would connect the surge arrestor to earth ground, either a grounding stake or other
suitable earth ground such as perhaps the strand to which the transducer is attached.

Figure 4 - Lightning Protection Scheme

Terminal Box/Multiplexer

Instrument Cable

LAB-3 Enclosure LAB-3 Board

Model 4410 Strandmeter

Strand

Ground Connections

Surface

(usually buried)

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Summary of Contents for 4410

Page 1: ...ns 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 1994 2017 by Geokon Inc Doc Rev N 11 27 17 ...

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Page 3: ...re are no warranties except as stated herein There are no other warranties expressed or implied including but not limited to the implied warranties of merchantability and of fitness for a particular purpose Geokon Inc is not responsible for any damages or losses caused to other equipment whether direct indirect incidental special or consequential which the purchaser may experience as a result of t...

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Page 5: ...Sensors with Bare Leads 7 3 2 3 Operating the GK 405 7 3 3 GK 403 READOUT BOX OBSOLETE MODEL 8 3 3 1 Connecting Sensors with 10 pin Bulkhead Connectors Attached 8 3 3 2 Connecting Sensors with Bare Leads 8 3 3 3 Operating the GK 403 8 3 4 MEASURING TEMPERATURES 8 4 DATA REDUCTION 9 4 1 DEFORMATION CALCULATION 9 4 2 STRAIN CALCULATION 11 4 3 TEMPERATURE CORRECTION 11 4 4 ENVIRONMENTAL FACTORS 12 5 ...

Page 6: ...GINEERING UNITS CONVERSION MULTIPLIERS 9 TABLE 2 SAMPLE RESISTANCE 14 TABLE 3 RESISTANCE WORK SHEET 14 TABLE 4 MODEL 4410 STRANDMETER SPECIFICATIONS 15 TABLE 5 THERMISTOR RESISTANCE VERSUS TEMPERATURE 16 EQUATIONS EQUATION 1 DIGITS CALCULATION 9 EQUATION 2 DEFORMATION CALCULATION 9 EQUATION 3 STRAND CALCULATION IN MILLIMETERS 11 EQUATION 4 STRAND CALCULATION IN INCHES 11 EQUATION 5 THERMALLY CORRE...

Page 7: ...nected to the wire at one end and a connecting rod at the other The unit is fully sealed and operates at pressures of up to 250 psi As the connecting rod is pulled out from the gage body the spring is elongated causing an increase in tension which is sensed by the vibrating wire element The tension in the wire is directly proportional to the extension hence the change in deformation can be determi...

Page 8: ...etween the green and white should be approximately 3000 ohms at 25 C see Appendix B and between any conductor and the shield should exceed two megohms 2 2 Strandmeter Installation Figure 2 Model 4410 Strandmeter Installation Note References to the PVC grease tube in the following instructions are for strandmeters used on strands that are to be embedded in concrete For strands out in the open the g...

Page 9: ...ith grease A 1 4 28 threaded hole Figure 1 is provided which will accept a standard grease fitting Screw the fitting into the hole fill with grease and then remove the fitting 11 For embedded strandmeters it is necessary to provide the clamps with a bond breaker Using the Aqua Seal provided place a layer over the clamp areas on both ends followed by an overall layer of electrical tape The purpose ...

Page 10: ...n for splicing materials and additional cable splicing instructions Cables may be terminated by stripping and tinning the individual conductors and then connecting them to the patch cord of a readout box Alternatively a connector may be used which will plug directly into the readout box or to a receptacle on a special patch cord 2 5 Lightning Protection The Model 4410 Vibrating Wire Strandmeter un...

Page 11: ...e arrestor to earth ground either a grounding stake or other suitable earth ground such as perhaps the strand to which the transducer is attached Figure 4 Lightning Protection Scheme Terminal Box Multiplexer Instrument Cable LAB 3 Enclosure LAB 3 Board Model 4410 Strandmeter Strand Ground Connections Surface usually buried ...

Page 12: ...ith blue representing the shield bare To turn the GK 404 on press the ON OFF button on the front panel of the unit The initial startup screen will display Geokon Inc GK 404 verX XX After approximately one second the GK 404 will start taking readings and display them based on the settings of the POS and MODE buttons The unit display from left to right is as follows The current Position Set by the P...

Page 13: ...le connector until it locks into place 3 2 2 Connecting Sensors with Bare Leads Attach the GK 403 2 flying leads to the bare leads of a Geokon vibrating wire sensor by connecting each of the clips on the leads to the matching colors of the sensor conductors with blue representing the shield bare 3 2 3 Operating the GK 405 Press the button labeled POWER ON BLUETOOTH A blue light will begin blinking...

Page 14: ... may change one or two digits while reading 4 The thermistor reading will be displayed above the gage reading in degrees centigrade 5 Press the Store button to record the value displayed If the no reading displays or the reading is unstable see Section 5 for troubleshooting suggestions The unit will automatically turn off after approximately two minutes to conserve power 3 4 Measuring Temperatures...

Page 15: ...he Initial Reading usually obtained at installation G is the Calibration Factor usually in terms of millimeters or inches per digit F is an engineering units conversion factor optional see Table 1 From To Inches Feet Millimeters Centimeter s Meters Inches 1 12 0 03937 0 3937 39 37 Feet 0 0833 1 0 003281 0 03281 3 281 Millimeters 25 4 304 8 1 10 1000 Centimeters 2 54 30 48 0 10 1 100 Meters 0 0254 ...

Page 16: ...10 Figure 7 Typical Strandmeter Calibration Report ...

Page 17: ...emperature coefficient of the strand to which the Strandmeter is attached should also be taken into account By correcting the transducer readings for temperature changes the temperature effect on the strand can be isolated and quantified The following equation applies Dcorrected R1 R0 G T1 T0 K Equation 5 Thermally Corrected Deformation Calculation Where R1 is the Current Reading R0 is the Initial...

Page 18: ... 15 8 0 00389 Dcorrected 445 0 0006194 0 04435 Dcorrected 0 2756 0 04435 Dcorrected 0 3199 mm 4 4 Environmental Factors Since the purpose of the strandmeter installation is to monitor site conditions factors that may affect these conditions should always be observed and recorded Seemingly minor effects may have a real influence on the behavior of the structure being monitored and may give an early...

Page 19: ...t is fully retracted with the alignment pin inside the alignment slot as shown in Figure 1 the readings will likely be unstable because the vibrating wire is out of its specified range Is there a source of electrical noise nearby Likely candidates are generators motors arc welding equipment high voltage lines etc If possible move the instrument cable away from power lines and electrical equipment ...

Page 20: ... infinite infinite infinite White infinite infinite N A 3000Ω at 25 C infinite Green infinite infinite 3000Ω at 25 C N A infinite Shield infinite infinite infinite infinite N A Table 2 Sample Resistance Vibrating Wire Sensor Lead Grid SENSOR NAME Red Black White Green Shield Red Black White Green Shield Table 3 Resistance Work Sheet ...

Page 21: ...0 Hz Coil Resistance 150 Ω 10 Ω Cable Type 4 Two twisted pair four conductor 22 AWG Foil shield PVC jacket nominal OD 6 3 mm 0 250 Length x Width 203 x 45 mm clamp width Weight with gage clamps 0 5 kg 1 1 lb Table 4 Model 4410 Strandmeter Specifications Notes Other ranges available consult factory Minimum greater resolution possible depending on readout 3 Accuracy established under lab conditions ...

Page 22: ...2 83 107 9 123 77 66K 36 8006 4 1363 44 331 5 84 105 2 124 72 81K 35 7618 5 1310 45 321 2 85 102 5 125 68 30K 34 7252 6 1260 46 311 3 86 99 9 126 64 09K 33 6905 7 1212 47 301 7 87 97 3 127 60 17K 32 6576 8 1167 48 292 4 88 94 9 128 56 51K 31 6265 9 1123 49 283 5 89 92 5 129 53 10K 30 5971 10 1081 50 274 9 90 90 2 130 49 91K 29 5692 11 1040 51 266 6 91 87 9 131 46 94K 28 5427 12 1002 52 258 6 92 85...

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