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DET5/4D
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Megger DET5/4D User Manual
Digital earth testers
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Contents
Table of Contents
Bookmarks
Table of Contents
Safety Warnings
Table of Contents
Contents
Illustrations
General Description
Applications
Fig.1 DET5/4 Features and Controls
Live Earth Safety Precautions
Conditions May Occur
Features and Controls
Fig.3 Low Battery Voltage Indication
Operation
General Testing Procedure
Display Symbols
Fig.4 High Current Spike Resistance Warning
Fig.5 Excessive 'Noise' Warning
Setting-Up the Test Spikes Etc
Fig.6 Reverse Polarity Indication
Basic Test Procedure
Battery Charging (DET5/4R)
Fitting or Replacing the Battery Cells
(Det5/4D)
MEASURING TECHNIQUES Testing Earth Electrodes
Fall-Of-Potential Method
The 61,8% Rule
Electrode and Current Spike
Fig.10 the 61,8% Rule Method
The Slope Method
Fig.12 Resistance Curve from Slope Method
Tests
Fig.13 Possible Results from Several Slope Method Tests
Method Using 'Dead' Earth
Fig.14 'Dead' Earth Testing
BS7671 (16Th Edition IEE Wiring Regulations) Requirements
Other Methods
Fig.15 Test Spike Positions for BS7671
Determining 'Touch' Potential
Fig.16 Determining 'Touch' Potential
Determining 'Step' Potential
Fig.17 Determining 'Step' Potential
Typical Variations in Soil Resistivity
Line Traverse
Fig.18 Soil Resistivity Measurement
Calculation of Resistivity
Fig.19 Resistivity Calculation Nomogram
Continuity Testing
Fig.20 Continuity Testing
Fig.21 Block Diagram of Instrument Circuit
Circuit Description
Specifications
Fig.22 Instrument Accessories
Accessories
Chart for Use with Slope Method
Repair and Warranty
Guide de L'utilisateur
Gebrauchsanleitung
Guía del Usuario
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1
General Description
2
General Testing Procedure
3
Battery Charging (Det5/4R)
4
Measuring Techniques Testing Earth Electrodes
5
Specifications
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M
DET5/4R & DET5/4D
Digital Earth Testers
USER GUIDE
GUIDE DE L'UTILISATEUR
GEBRAUCHSANLEITUNG
GUÍA DEL USUARIO
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