Table of Contents
1 Safety and Liability 4
1.1 General Information 4
1.2 Liability 4
1.3 Safety Instructions 4
1.4 Symbols used in the operating instructions 4
1.5 Correct Usage 4
2 Tutorial 5
2.1 The Half-Cell Potential Measurement Principle 5
2.2 Factors affecting the Potential Measurement 6
2.3 Application Limits of the Potential Measurement Technique 6
2.4 The Electrical Resistivity Measurement Principle 7
2.5 Influence of Rebars on Electrical Resisitivity Measurements 7
2.6 Effect of Electrical Resistivity on Half-cell Potential Measurements 7
3 Getting Started 8
3.1 Prepare the electrode(s) 8
3.2 Connect the electrode / probe to the indicating device 8
3.3 Power ON and select the correct operating mode 9
3.4 Functional check of the equipment 10
4 Real Tests – Potential Measurements 10
4.1 Planning and preparation 11
4.2 Selecting the correct grid 11
4.3 Choosing the appropriate electrode 11
4.4 Connect to the reinforcement 11
4.5 Functional check of the instrument 11
4.6 Preparation of the test surface 12
4.7 Check to see if coatings need to be removed 12
4.8 Pre-moistening the concrete surface 12
4.9 Carrying out the measurement 13
4.9.1 Reading the display screen 13
4.9.2 Measuring with the Rod Electrode 14
4.9.3 Measuring with the Wheel Electrode 15
4.9.4 Re-opening an object 15
4.9.5 Overwriting or deleting readings 15
4.10 Evaluation 16
4.10.1 Example of a typical distribution 16
4.11 Confirmation and refining of hotspot positions 17