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Fluke 1625 Stakeless Earth/Ground Resistance Testing, Principle of Operation, edw069.eps

Models: 1625

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	Stakeless Earth/Ground Resistance Testing
		Principle of Operation


Display		Significance	Note

		Resistance
		under test is
ST	V	above
ST	V	measuring
		measuring
		range
edw069.eps

Legend: W= displayed flashing

Page 81

Image 81

Fluke 1625 user manual Stakeless Earth/Ground Resistance Testing, Principle of Operation, edw069.eps

Contents

1625 Earth/Ground TesterUsers Manual 11/99 LIMITED WARRANTY AND LIMITATION OF LIABILITYTitle Table of Contents1625 Users ManualDescription of Displays Models and Accessories List of TablesElectrical Measurement Specifications Description of DisplaysUsers Manual 1625List of Figures Users Manual 1625Introduction Earth/Ground Tester1625 Figure 1 displays the Fluke 1625 Earth/Ground TesterFigure 1. Fluke 1625 Earth/Ground Tester Models and Accessories Models and AccessoriesEarth/Ground Tester Safety Instructions W Warning1625 Qualified Staff SetupUnpacking Checking the Scope of DeliveryAdditional Accessories General1625 Description of Functions AssemblyAssembly Earth/Ground TesterMeasurement of Interference Voltage UST Measurement of Interference Frequency FST1625 Selective Measurement of Earthing Resistance RE A Measurement of Earthing Resistance REResistance Measurement R~ Low Resistance Measurement RFSpecifications LO-BAT1625 Earth/Ground Tester SpecificationsMax voltage 1625Measurement of Interference Frequency F ST Measurement of Interference Voltage DC + AC USTEarthing Resistance R E SpecificationsUsers Manual 1625cordance with Parts offiducial value x 100%RH RS + 2000Ω ⋅1.25 ⋅10−6% + 5digits Specifications1625 R H/R E=edw005.eps RH RS + 2000Ω ⋅1.25 ⋅10−6 % + 5digits Selective Measurement of the Earthing Resistance REASpecifications Earth/Ground Tester1625 Resistance Measurement R~Max. interference current with a transformerResistance Measurement RF SpecificationsEarth/Ground Tester 1625 Compensation of Lead Resistance RKDescription of the Operating Elements Earth/Ground TesterDescription of the Operating Elements W Warning W AttentionW Warning 1625Description of Display Elements Earth/Ground TesterDescription of the Operating Elements W Warning Procedure of MeasurementsW Warning 1625Procedure of Measurements POWER ON Functionsa Standard mode b Stand by disableOperation 1625e Activation of display illumination SWITCHOVER Procedure of MeasurementsSWITCH Earth/Ground TesterSetting Range Control Loop1625 Functionsee Compensation of Earth Electrode Connecting Lead Procedure of MeasurementsEarth/Ground Tester 2poleChecking of Correct Measuring Connection Socket Alloca- tion Measuring Loop1625 Inside the measuring loop parameters cannot be changedMeasurement of Interference - Voltages and Frequen- cies Safety Control MeasurementsProcedure of Measurements Earth/Ground TesterMeasurement of Earthing Resistances 1625Figure 7. Measurement of Interference - Voltages and Frequencies Procedure of Measurements 3-pole/4-pole Measurement of Earthing ResistanceEarth/Ground Tester Figure 8. Earthing Resistances Measurement - Method1625 Remarks for the setting of earth spikes3-pole measurement with longer earth electrode connecting leads Procedure of MeasurementsEarth/Ground Tester Time average measurementMesh Operated Earthing Systems Using Selective Clamp Method Measurement of Single Earth Electrode Resistances intr . IZ Procedure of Measurements 3-pole/4-pole Measurement of Single Earth Electrode Re- sistancesEarth/Ground Tester Fix clip-on transformer around the earth electrode to be measured3-pole Measurement with Longer Earth Electrode Connect- ing Leads Remarks for the Setting of Earth SpikesTime Average Measurement 1625Measurements on High Voltage Pylons Procedure of MeasurementsEarth/Ground Tester 1625 R ENotices for the setting of earth spikes Procedure of MeasurementsR E Earth/Ground TesterMeasuring Earthing Impedance with 55 Hz R Correcting Clip-on Transformer Errors1625 Time average measurementR E withoutclip − onTransfprmer R E withclip − ontransformertrnew = trold ⋅ Procedure of Measurements100% ⋅ 0.192Ω = +19.5% 0.983Ω Compensation of Earth Electrode Connecting Leadtrnew = 1000 ⋅ 10..175983 = 1625Measurement of Soil Resistivity Procedure of MeasurementsEarth/Ground Tester 1625 ρ E = 2π .a.REEarth/Ground Tester Procedure of Measurementsrestivity SoilMeasurement of Resistances Resistance Measurement R~1625 Procedure of Measurements Resistance Measurement RFW Warning Earth/Ground TesterW Warning Compensation of Measuring Lead Resistance1625 Evaluation of measured valueChanging of All Data Settings with Personalized CODE Procedure of MeasurementsEarth/Ground Tester 1625 Users ManualFunction Storing a Code Procedure of MeasurementsEarth/Ground Tester 1625 Deleting a CodeLO-BAT Description of DisplaysEarth/Ground Tester Description of DisplaysUsers Manual 1625edw031.eps edw033.epsDescription of Displays Earth/Ground Testeredw037.eps edw038.epsUsers Manual 1625compensa age measEarth/Ground Tester No reactions to button control etcDescription of Displays edw046.epsservice Care and Maintenance1625 Users ManualReplacing Batteries Care and MaintenanceEarth/Ground Tester Storage RecalibrationService 1625Appendix A Stakeless Earth/Ground Resistance TestingIntroduction Stakeless Earth/Ground Resistance Testing1625 Specifications3 pole Order No. EI-1625 Developed, designed and manufactured toPurpose Principle of OperationStakeless Earth/Ground Resistance Testing Principle of Operation1625 = R X +Source Users ManualPrinciple of Operation Stakeless Earth/Ground Resistance TestingOperation 1625Use only current transformers referred to in this manual Stakeless Earth/Ground Resistance Testing Settings on the TesterIn this particular mode the values of RH and RS have no meaning Principle of Operation1625 ApplicationsPrinciple of Operation Stakeless Earth/Ground Resistance TestingLightning Protection Footing groundDescription of Displays 1625Users Manual Stakeless Earth/Ground Resistance Testing Principle of Operationedw069.eps Earthing Resistance Appendix BIntroduction Earthing Resistance Principle of Operationfor concrete mixtures 1 7 the values have to be increased by 24 % Soil Resistivity ρE 1625A = 1 m Principle of Operation Earthing ResistanceJuly month1625 Measuring MethodThe Potential Gradient Area Earthing ResistancePrinciple of Operation 1625 Earth Impedance R* on High Voltage Transmission Lines Earthing ResistancePrinciple of Operation Users Manual 1625