Campbell-scientific AVW1 and AVW4 Interfaces for Vibrating Wire Sensor Manual do Utilizador Página 1

INSTRUCTION MANUALUse of the AVW1 and AVW4 withGeokon Model 4500 Vibrating WirePiezometers and Pressure TransducersRevision: 1/92Copyright (c) 1987-19

AVW1/AVW42-4FIGURE 2.2-2. Temperature Measurement Error on a 1000 foot Lead. Wire is 22 AWG with 16ohms per 1000 feet.FIGURE 2.2-3. Temperature Mea

AVW1/AVW42-5FIGURE 2.2-4. Temperature Measurement Error on a 5000 foot Lead. Wire is 22 AWG with 16ohms per 1000 feet.FIGURE 2.2-5. Thermistor Line

AVW1/AVW42-62.3 PROGRAMMING AND SENSOR HOOK-UPMeasure the thermistor with Instruction 4 usinga measurement range of 2500 mV fast, anexcitation voltag

3-1SECTION 3. VIBRATING WIRE MEASUREMENTFIGURE 3.1-1. A Vibrating Wire Sensor3.1 GENERALFigure 3.1-1 illustrates how an increase inpressure on the

AVW1/AVW43-2TABLE 3.2-1. Calibration Data for Sensor 3998Gage Factor Temp. Coeff. Zero Rdg. Period Temp. Baro.(psi/digit) (psi/oC)(digit) (usecond) (

AVW1/AVW43-3Some additional information concerning theswept frequency may be found in Appendix C.NOTE: Please remember that sealed (orabsolute) senso

AVW1/AVW43-4Example: Using sensor number 3998 andassuming a sensor temperature of 15oC, thecorrected pressure would be:Pt = P psi + (-0.0698 psi/oC)*

4-1SECTION 4. THE AVW14.1 GENERALThe AVW1 contains circuitry needed tointerface Geokon's 4500 series vibrating wiresensor to the CR10. The AVW

AVW1/AVW44-2water. The water depth above the sensor isreferred to as the "Reading" in the followingequation. The Reading decreases withinc

AVW1/AVW44-303: P28 Vibrating Wire (SE)01: 1 Rep02: 2 IN Chan03: 1 Excite all reps w/EXchan 104: 24 Starting Freq. (units=100 Hz)05: 31 End Freq. (uni

Warranty and AssistanceThe AVW1 AND AVW4 are warranted by CAMPBELL SCIENTIFIC, INC.to be free from defects in materials and workmanship under normal u

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5-1SECTION 5. THE AVW45.1 GENERALThe AVW4 contains circuitry needed tointerface Geokon's 4500 series vibrating wiresensor to the CR10. The AVW

AVW1/AVW45-25.2 SENSOR HOOK UPFIGURE 5.2-1. Hook up for AVW45.3 DATALOGGER PROGRAMMINGThe following is a sample program thatmeasures four sealed Ge

AVW1/AVW45-302: P55 Polynomial01: 4 Reps02: 1 X Loc TEMP C #103: 1 F(X) Loc [:TEMP C #1]04: -104.78 C005: 378.11 C106: -611.59 C207: 544.27 C308: -240

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A-1APPENDIX A. PRESSURE CONVERSION CHART

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B-1APPENDIX B. SCHEMATICS AND STUFFING CHARTS FORAVW1 AND AVW4

APPENDIX B. SCHEMATICS AND STUFFING CHARTS FOR AVW1 AND AVW4B-2

APPENDIX B. SCHEMATICS AND STUFFING CHARTS FOR AVW1 AND AVW4B-3

ITABLE OF CONTENTSPDF viewers note: These page numbers refer to the printed version of this document. Usethe Adobe Acrobat® bookmarks tab for links

APPENDIX B. SCHEMATICS AND STUFFING CHARTS FOR AVW1 AND AVW4B-4

APPENDIX B. SCHEMATICS AND STUFFING CHARTS FOR AVW1 AND AVW4B-5

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C-1APPENDIX C. THEORY AND ADDITIONAL DETAILSC.1 SWEPT FREQUENCY THEORYExample: f2 = 31 hundred Hzf1 = 24 hundred HzX = (30*f1*f2)/(f2-f1) = 318

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Campbell Scientific CompaniesCampbell Scientific, Inc. (CSI)815 West 1800 NorthLogan, Utah 84321UNITED [email protected]

TABLE OF CONTENTSIITABLES2.2-1 Temperature vs. Thermistor Resistance, V, oC, and Linearization Error ... 2-13.2-1 Cali

1-1USE OF THE AVW1 AND AVW4 WITH GEOKON MODEL 4500VIBRATING WIRE PIEZOMETERS AND PRESSURE TRANSDUCERS1. GENERAL INFORMATIONThe CR10 is the only CSI d

AVW1/AVW41-2be placed at the desired level and allowed tocome to temperature equilibrium with itssurroundings (5 minutes or more). Themultiplier dete

2-1SECTION 2. TEMPERATURE MEASUREMENT2.1 GENERALThe vibrating wire probe includes a thermistorwhich is used to measure the temperature ofthe probe.

AVW1/AVW42-2SENSORTEMP RESISTANCE, VOLTS CR10 ERRORoC OHMS OUT OUTPUT,oCoC 0 9796 0.791339 0.057084 0.057084 1 9310 0.

AVW1/AVW42-3SENSORTEMP RESISTANCE, VOLTS CR10 ERRORoC OHMS OUT OUTPUT,oCoC 49 1123 1.754878 49.07873 0.078734 50 1081 1.