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Sistema Ohmcorr™
Medidor de resistividad del concreto

Ohmcorr sistema medidor de resistividad<br>Utilizado para evaluar corrientes de corrosion en el concreto
Ohmcorr Test System Resistivity Meter


 
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Product Code: C-RM-8000


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Medidor OhmCorr™

Medidor de resistividad para evaluar las corrientes de corrosión en el concreto.


Notas de compra

  • Consumible: C-RM 8045  Gel Conductiva


Aplicaciones

  • Confirme resultados obtenidos con el Cor-Map o Cor-Map II


Ventajas y Características

  • Economico y facil de usar.

  • Lectura numérica directa de resistividad. Las medidas sacadas desde dos agujeros pequeños evitan problemas y errores de medidas superficial.

  • Evalúa las dañinas corrientes de corrosión en el concreto.
  • Se usa en conjunto con El Sistema CorMap de James para producir diagramas de resistividad.


Assesses Concrete Resistivity.

OhmCorr™ has two probes spaced 1.97" (5cm) apart which are placed in holes drilled to a depth of 3/8th" (8mm) and filled with conductive gel. The direct digital read-out of resistivity is displayed on the LCD when the control switch is activated. OhmCorr™ and CorMap™, when used together, provide an economical and sound diagnostic system of corrosion in reinforced concrete.


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 LEVEL
(K OHMS CM)

<5

5 to 10

10 to 20

>20

POSSIBLE CORROSION RATE OF                                                               
REINFORCEMENT REBARS                                                               

Very High                                                               

High                                                               

Moderate to Low                                                               

Insignificant                                                               



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.


Specifications

Weight complete in carrying case           
8 lbs (4 kilos)
Display:
4-1/2” Digit in LCD
Resolution:
± 0.1K ohms cm (± 1 Digit)
Range:
0.5 - 20K ohms cm
Battery:
9 Volt

 


Downloadable Document



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