Video 21: Real-world Issues in the Field

Video 21: Real-world Issues in the Field

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  2009 Copyrighted material by Wagner Meters All rights reserved. So, let’s finish-up with some real-world testing-issues and questions that we ran across weekly, where people in the field, doing relative humidity testing, very critical, and they have a lot of questions and comments. And again, we hear many of them every week. So, let’s […]

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Video 20: Kanare’s Summary

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters So, to wrap up, we know that relative humidity indicates the chemically active water that’s available to interact with adhesives and floor coverings. In our experience over the last 15, 20 years making lots of measurements, thousands of measurements on […]

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Video 19: In Situ RH Stability

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters I want to talk for a minute this next slide about the sensitivity of relative humidity to ambient conditions. We saw before that with calcium chloride kits, the air temperature and relative humidity can have really a significant effect on […]

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Video 18: Adhesives Moisture Tolerances Vary

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters We can actually assess the effect of relative humidity that the adhesive seize by doing testing. This picture shows a whole series of standard test blocks of concrete set over standard relative humidity solution. And what we do, is take […]

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Video 17: Why You Can Trust RH Probes

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters Let’s talk about reliability. Why should we trust relative humidity? Well, as seen on this next schematic drawing, the Finish Floor System actually “sees” relative humidity. When you looked at a floor system, think about this, a concrete has been […]

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Video 16: Best Locations to Place RH Tests

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters We often get asked a question, “How many tests are necessary and where should the test be placed within a building?” The ASTM F2170 Standard for relative humidity probes in a concrete gives direction in section 10. It says, “Perform […]

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Video 15: Rapid RH® Solves the Problem of Recalibration

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  2009 Copyrighted material by Wagner Meters All rights reserved. We know that with this external probes and the sleeve method with this external probe that are reused and opened to possible contamination from reused, that they need to be verified for calibration. Currently, the ASTM F2170 Standard calls-out for verification of calibration of these […]

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Video 14: Recalibration Issues with Reusable Probes

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters Let’s talk a little bit about recalibration. Probes that are used for ASTM F2170 according to the ASTM standard must be checked within 30 days before use. There’s a movement and it’s likely that the standard would be change very […]

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Video 13: The Rapid RH® Solves Leapfrogging Problems

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  2009 Copyrighted material by Wagner Meters All rights reserved. www.rapidrh.com The speed of equilibration of Relative Humidity Probes and Leapfrogging are closely related topics when we are talking about relative humidity measurement. Earlier you saw how relative humidity testing in general is a very fast method for getting correct readings and finding out where […]

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Video 12: Leapfrogging Problems with Reusable Probes

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters The other issue, of course, is using reusable probes where we move them or leapfrog from one hole to another. Let’s take a look at that in the next slide. This next slide shows a couple of holes drilled into […]

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Video 11: RH Provides Results Faster Than Any Other Method

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters A look again at the floor covering being placed on the concrete, the relative humidity throughout the slab is roughly equilibrated, and so what we measured with the probe is what the coating or floor covering is really seeing. This […]

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Video 10: RH: The Most Accurate Method

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters We’ve been asked the question, do we need to use other types of moisture testing for floors besides relative humidity? Is it a good idea to use multiple methods to understand the moisture condition of the floor? In our opinion, […]

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Video 9: Rapid RH® – Most Accurate Measurement Device

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  2009 Copyrighted material by Wagner Meters All rights reserved. www.rapidrh.com You’ve just seen how measuring at the correct depth is critical to the utilization of relative humidity testing in concrete slabs. Again, this information came from studies that were done at Lund University in Sweden back in the mid to late ’90s. It was […]

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Video 8: RH the Most Useful Test Method

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters So let’s go ahead and talk about what is relative humidity, why is it useful, why we should trust it. First, let’s understand a little bit about what actually relative humidity is. Relative humidity is the ratio of how much […]

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Video 7: Problems with the Hood Method

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters Another moisture test method is a relatively new ASTM standard that was first published in 2005. It’s generally referred to as the hood method. The method actually involves using an insulated, moisture resistant hood out of an insulating material into […]

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Video 6: Problems with Moisture Meters

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters Now, on this next slide, you see the representation of a hand-held electronic meter, and there is a little animation showing the electronic field that’s put out by the meter at the surface. These meters are tuned and manufactured so […]

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Video 5: Calcium Chloride Shown to Give False Readings Part 2

By Wagner Meters in | Comments Off on Video 5: Calcium Chloride Shown to Give False Readings Part 2

  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters On this next slide, we’ll take a look at the relationship between the calcium chloride kits and the internal relative humidity measured with probes in the concrete. I’m often asked the question: What is the relationship? Does three pounds measured […]

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Video 4: Calcium Chloride Shown to Give False Readings Part 1

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  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters ASTM F1869, often called the moisture vapor emission kit or chloride kit, it has been around for a long time, but what we’ve learned is that it’s actually not necessarily fundamentally accurate or useful in the way we had thought […]

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Video 3: Moisture Is Always An Issue In Concrete Slabs

By Wagner Meters in | Comments Off on Video 3: Moisture Is Always An Issue In Concrete Slabs

  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters Let’s talk first of all about what it is that we want to measure. Floor covering as you see in this slide, over on the right-hand side is a picture of the different components in a floor system. There are […]

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Video 2: Relative Humidity Testing for Concrete Floors

By Wagner Meters in | Comments Off on Video 2: Relative Humidity Testing for Concrete Floors

  2009 Copyrighted material by CTLGroup. All rights reserved. Used with permission by Wagner Meters Hi, I’m Howard Kanare, Senior Principal Scientist at CTLGroup in Skokie, Illinois. Welcome to our seminar on Relative Humidity Testing for Concrete Floors. Let me tell you a little bit about our organization. CTLGroup is the independent, wholly owned subsidiary […]

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