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(J22;CORROSION7) RESISTIVITY METER TO ASSESS CORROSION CURRENTS IN CONCRETE
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(J22;CORROSION7) RESISTIVITY METER TO ASSESS CORROSION CURRENTS IN CONCRETE |
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(Made in USA)(FR-J/C319) BETONDAKİ GEÇERLİ KOROZYON DEĞERLERİNİ HESAPLAMAK İÇİN RESİSTİVİTY METER (DİRENÇ ÖLÇER)----------------------------------------OhmCorr™ Meter |
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Assesses damaging corrosion currents in concrete. | |
Economic and easy to use. | |
Direct digital readout of resistivity. Measuring from two small holes avoids the problems and errors of surface measurements. | |
Used in conjunction with CorMap™ System to produce resistivity plots. |
Technical
The electrical conductivity of concrete is an electrolytic process that takes place by the movement of ions in the cement matrix. This ionic movement will occur when contaminants such as chloride ions or carbon dioxide are introduced into the cement mortar matrix.
A highly permeable concrete will have a high conductivity and low electrical resistance. Because resistivity is proportional to current flow, the measurement of the electrical resistance of concrete provides a measure of the possible rate of corrosion. Since carbonation seriously affects surface resistance, measurement on the concrete surface should be avoided.
The James resistivity meter, OhmCorr™, has two probes spaced 5cm (1.97 inches) apart which are placed in two holes drilled to a depth of 8mm (3/8 inch) and filled with conductive gel. The concrete resistivity is displayed on an LCD when the control switch is activated.
The following table correlates a range of values vs. the possible rate of corrosion of the reinforcement bars.
RESISTIVITY | POSSIBLE CORROSION |
<5 | Very High |
The James OhmCorr™, when used in conjunction with the James CorMap™ System provides an economic and sound means of diagnoses of corrosion in reinforced concrete.
Sales Numbers | |
C-RM-8000 | Complete System |
C-RM-8030 | Electronic Meter |
C-RM-8040 | Probe |
C-RM-8042 | One 10ft (3M) Cable with Connectors |
C-RM-8045 | 3oz (85ml) Jar of Conductive Gel |
C-RM-8055 | 1/4” Drill Bit |
Specifications | |
Weight complete in carrying case | 8 lbs (4 kilos) |
Display: | 4-1/2” Digit in LCD |
Resolution: |
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Range: | 0.5 - 20K ohms cm |
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