Newsletter: How to use a Reference Scale for Evaluating Concrete

 

May 2017,

Issue No. 20

Lignomat Product Video

Lignomat in situ probe method for ASTM F2170

(Watch Video)

Lignomat Ligno-Scanner SDM

(Watch Video)

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How to Use a Reference Scale When Analyzing a Concrete Slab

When placing a floor covering over concrete slabs a contractor must first evaluate the concrete to ensure proper acclimation has been met. We often use two different methods for evaluating moisture in materials a qualitative analysis and a quantitative analysis.

Qualitative vs Quantitative analysis. Often times with a moisture meter we describe the scale as a qualitative number or a quantitative number. A qualitative number is often referred to when using a reference scale. A reference scale commonly has a range from 0-100 and should be used in terms of more moisture or less moisture. We always tell our customers that this scale should only be used as a comparative reading. Thus one should take a reading in an area where there are no moisture problems and compare that reading to an unknown area where there could be a leak or more moisture. 

Another good application is when a floor installer is preparing to drill holes so he can set his RH probes to do moisture tests using ASTM F2170. The floor installer wants to set the RH probes so that he can get a good representation of the concrete slab. He uses the Ligno DuoTec BW in pinless mode, on setting 25, and starts scanning the floor. His average reading is between 35 and 45, however he has found a few spots that are reading a little higher in the 55 range. Since the floor installer wants to make sure the flooring he is installing stays as beautiful as the day he puts it in, he drills the holes where the moisture meter was reading 55. The meter has picked up more moisture in these areas however the number 55 is only a qualitative number it is not a percentage of moisture. The floor installer drills the holes and sets his sensor. 72 hours later he is ready to take some RH readings. He is getting readings that range from 65% -70%. This is a quantitative measurement taken using a RH% scale. From this we can analyze if the concrete slab is ready to have a floor covering installed. Using the manufactures specifications he can ensure that the concrete slab is ready for his floor covering. 

Floor installer taking a measurement on setting 25 in order to get a qualitative analysis of the concrete slab. Notice there is no unit of measurement on the reading.

The moisture in a slab sits 40% into the concrete slab. Only when a floor covering is placed on top of the slab will the moisture move to the surface and cause floor covering failure. Lignomat pinless moisture meters read up to 3/4″ into material, thus the information that you get from a pinless reading cannot alone determine if a concrete slab is ready for a floor covering. It is always recommended to use the ASTM F2170 test method for evaluating a concrete slab. 

www.lignomat.com  —  Email: sales@lignomat.com – 800-227-2105  —

Lignomat’s Unique Design for Taking Measurements Using ASTM F-2170

The RH BluePeg uses a single microchip, factory calibrated to NIST Standards. Each BluePeg comes with a NIST traceable certificate. The RH BluePeg probes comply with the latest ASTM F2170.

For the first year, Lignomat offers to check the probe calibration at no charge. For sensitive tests, the calibration of the removable probes could be checked after the test. We also sell a salt solution for the RH BluePeg probe which can be purchased for $49.00. The salt solution allows for easy calibration that can be done in-house over and over again.

Good Seal, Easier to Place Sleeves

Lignomat’s sleeves have feathered fins along their entire length, which provide an excellent seal. The lip of the sleeve covers the area around the concrete hole and provides another barrier for any air escaping. At the bottom of the sleeve is a movable cylinder, which places the RH probe every time as required by the ASTM F2170. Standard sleeves require no cutting. 3″ long sleeves are available. We also have top extenders that can be used when measuring gyp-crete.

Better Sealing, Flatter Caps

 Lignomat’s caps come with an o-ring to absolutely seal the sleeves. The caps are flat and do not interfere with any traffic around the test area. We supply red caps to easily spot the sleeve with a RH BluePeg sensor.

Fast Connection

A fail-proof, easy-connect 35 mm stereo plug is used to connect RH probes. No twisting, turning or setting-up an instrument for readings. No pin arrangements need to be fitted.

Most Accurate Testing

Our meter instantly shows the RH and temperature values. The resolution on Lignomat’s meter is 0.1%. No guessing or rounding up.

 

 

Newsletter: How to Make Sure Your Moisture Meter is Working Correctly

 

November 2016,

Issue No. 19

Interesting Websites

Calibration of Handheld Moisture Meters. 9 Wood:

(read more)

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How to make sure your moisture meter is working correctly.

Every floor installer and inspector should have a meter to check the moisture in wood floors. Having a moisture meter and knowing how to use it is not all there is to know. It is also important to know how to check calibration and function of the meter to avoid false measurements.

Floor installers should measure the moisture content upon delivery, before and after acclimation and when the floor has been installed.

Recently I had a phone call from a customer asking me, why two meters he is using on the same floor read differently. He said one meter consistently reads around 6%, whereas the other meter from a different manufacturer read consistently no values lower than 8%. We finally figured out the reason for the discrepancy by checking the default readings for both meters. (Default reading is the value a meter indicates, when the read button is depressed with nothing connected and pins pointing into the air.)

The default reading for one meter was 6% the other meter read 8% even though the pins were not touching any wood. A moisture meter will never read any lower than the default reading, which means the meter with the 8% default reading will never be able to indicate any moisture content below 8%, even when measuring drier wood.

Since the moisture meter user may not be aware of any malfunctioning of the meter, it is advisable to check the basic functions of a pin and pinless meter before and after each test series. In addition, the calibration of moisture meters can be checked with calibration test blocks available from the moisture meter manufacturers.  These external check blocks are essential for a valid check procedure. Moisture meters often have internal calibration checks, but those checks do usually not include the connection to the measuring plates for pinless meters or the connection to the pins, cables or hand probes for pin meters.

Basic function check for pin meters:

When the on-off switch or read button is depressed by hand without touching the pins, the lowest moisture value for the chosen wood species setting should be displayed (default reading). This test indicates there is no short within the circuitry. Meters may also show higher values if the area between the 2 pins is contaminated or has condensation.

This meter from Lignomat shows the lowest value (default reading for wood group setting #3) with the decimal point blinking. On-off switch between the pins is depressed, but fingers are not touching the pins.

When the on-off switch or read button is depressed and both pins (integral pins on the meter or pins of the external probe) are touched at the same time with two fingers, at least 12% should be indicated. Continuity test indicates that the connection from pins to circuit board to display is working.

Calibration check:

Last, the calibration can be checked with the pin test block. The pin check block consists of one or two resistors which produce a certain moisture value when pins are touching the contact points of the calibration check block. 

Only an external check block can confirm, that probe, cable and meter are functioning properly. Measurements are supposed to be within +/-1% of 12% for this calibration check block.

Basic function check for pinless meters.

When the on-off switch or read button is depressed and nothing is touching the measuring plates on the back of the meter, the lowest moisture value for the chosen wood group is displayed (default reading).

Hold meter in the air to make sure no material is touching the measuring plates and the lowest possible value appears on the screen with “Min”. 

For the continuity test, place the pinless meter on your forearm and depress the read key, a high moisture value should be indicated. An additional meter check can be performed by measuring a realm of paper. If the paper test is done repeatedly with the same setting, the indicated value should not vary significantly over the course of a year. This can be used to check consistency and accuracy of the calibration over time.

 Last, the calibration can be confirmed with the calibration check block. The check block for pinless meter is usually a material plate which produces a defined reading when the meter is lightly pressed against the surface.

Always press down slightly on the meter when taking measurements and when checking the calibration with a calibration test block. 

After checking the meter with the above described methods, you think you are ready to take measurements. Stop. A very important next step is to set the meter for the correct wood species. Find out about the wood species.  Find out if it is an engineered floor and what the hardwood species of the top layer is, set the dual-depth meter for that species and the ¼” measuring depth. Now you are ready to start a test series.

Last, your moisture measuring report should include place, date, moisture meter brand and instrument name, pin or pinless, wood species setting and measuring depth, location where the reading was taken and indicated moisture value in percent. A photo of the meter while taking readings is always helpful.

What if all of the above has been followed, but accidently the wrong species setting has been used for the measurements. If you cannot go back to take the readings again, ask the meter manufacturer, if they can tell you what the readings would have been with the correct setting.

www.lignomat.com  —  Email: sales@lignomat.com – 800-227-2105  — Grete Heimerdinger

Product Manager at Lignomat.

 

Newsletter: Storing and Acclimating Your Lumber

 

August 2016,

Issue No. 18

AT A GLANCE

*Storing and Acclimateing Your Lumber

* Moisture in Concrete: Free and Bound Moisture

Interesting Websites

Concrete Floors and Moisture

(read more)

Scientific article about different methods to measure moisture in concrete. Great information about the different types of water in concrete.

(read more)

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Storing and Acclimating Your Lumber

Many woodworkers end up collecting and storing all different types of wood whether its leftovers from a previous project , or wood for a project that will be happening down the road. It usually ends up in an old shed or the side of the workshop and of course preferably in a climate controlled room. Where ever you may be storing wood it is important to understand how the climate the wood is in affects the usability of the wood.

 

If dry wood is stored in a damp place the wood will pick up moisture and expand until equilibrium with the surrounding air has been reached. If the wood is stored in a dry area the wood will lose moisture and shrink until equilibrium has been reached. For corresponding values check the EMC chart.

 

Proper acclimation of your wood before starting a project will minimize moisture problems when the woodwork is done and brought into the home. Nothing is more frustrating than making a nice dresser and bringing it into the home only to have it shrink and cause loose joints. An easy recommendation that we always provide our customers is to take a moisture meter and measure a table or some other woodwork in the home. Once you have established what the wood has acclimated to in the home then you have a MC% of what you want your wood that you are working with to be.

Moisture in Concrete, Free vs Bound Moisture

Water in concrete is presented in three states: as free water held by capillarity, as absorbed water held by surfaces forces and as bound water held chemically. The ideal method of moisture measurement should quantify amounts of these three states but this is a difficult task because moisture in concrete is not uniformly distributed, and moisture distribution varies with the exposure time (Li Chunqiu 2008). Temperature, wind speed and environmental relative humidity are variables that must be considered at the moment of this measurement as well.

 

Using a pin moisture meter or a pinless moisture meter Is not a good method for analyzing moisture in a concrete slab. These types of meters are not able to pick up the different types of water in concrete. The meter will measure all of the water in the slab not just the free water.

The free water is what is going to affect the vapor emissions that will cause floor covering failure.

 

Measuring the moisture of a concrete floor is very hard because of the nature of concrete. The floor covering industry is always evolving and trying to incorporate a more accurate and efficient method for evaluating moisture in a concrete slab. 10 years ago people were only doing the calcium chloride test when analyzing moisture in concrete. Today many manufactures and people in the floor covering industry have moved to using the RH in-situ probe method following ASTM F2170 standards. Lignomat has developed a system for measuring concrete following the ASTM F2170 guidelines. Please call if you are interested in purchasing. If you would like a more detailed video of how the system works please visit link below.

 

https://youtu.be/UnyRz6XFTqs

Li Chunqiu, L. K. ( 2008). “Numerical analysis of moisture influential depht in concrete during drying wetting cycles.” Tshingua Science and Technology Vol 13, N°5: 696-701.

 

Newsletter March 2016: Case Study Floor Covering Failure

 

March 2016,

Issue No. 17

AT A GLANCE

*Case Study: Customer Calls with Floor Covering Failure

* Why is Wood Cupping and Shrinking?

Interesting Websites

Popular Woodworking Magazine: Moisture Meters

(see more)

Understanding, Preventing, Detecting and Correcting Moisture in Concrete Floors

(read more)

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Case Study: Customer

Calls with Floor Covering

Failure

We recently had a customer call us with a problem. He was called onto a site where the floor had cupped and boards were twisted. He wrote us that he inspected a wood floor, ¾ x 5 inch, stapled down, upstairs over plywood.  Consumer told him the species was Teak.  The ¼ and ¾ depth readings were done with a SDMspecies setting 55. 

While writing the report, he called and found out from the floor reatiler that the species was Timbauba.  The product name for the consumer was Golden Teak.  So he do not know how to adjust the meter readings.  

Location            1/4″ depth        3/4″ depth           

     

Hall                        12.4                12.4                    

Hall                       10.9               11.1          

Bedroom front      10.1                10.4              

Front closet          11.9               12.3               

Hall bedroom        11.1               11.3               

Master                   10.2               10.7               

Shelf                      12.8              12.8            

Shelf                      11.4              11.6

Pieces of wood sent in by customer to be evaluated. The wood as shown above was warped. 

Grete Heimerdinger’s response – VP Lignomat

here is a web-site which has information about Timbauba http://www.fpl.fs.fed.us/documnts/TechSheets/Chudnoff/TropAmerican/htmlDocs_tropamerican/Enterolobiumschomburgkii.html

The specific gravity for Timbauba is very different from 55, that is why those measurements came out so different. The low Lignometer K readings indicate that the meter was giving default readings, which means the resistance in the wood is so high , that the meter cannot measure the wood.

The SDM readings were corrected for setting number 55. To see the difference in readings between 55 and 84, I took a piece of White Oak and measured the moisture on setting number 55. The readings were about 11.1, 11.0.Then I changed the settings to number 84 and took readings again of the same White Oak piece in the same location and the measurements showed 6.9 and 7.0. Changing the setting from 55 to 84 will reduce the measured values by about 4%. I hope this information helps. Let me know, if you have any more questions.

 Grete 

When taking measurements of a piece of wood it is crucial to have the proper calibration for the species of wood to be tested.

When using a pinless moisture meter the specific gravity is the calibration factor. With Lignomat pinless moisture meters you simply put the specific gravity into the meter. For example: Specific Gravity of Timbauba is 0.84 so the Ligno-Scanner moisture meter should be set to 84.

The calibration for a pin type moisture meter is a little more complicated. Lignomat performs an oven dry test to find the appropriate calibration for the wood. When you have a moisture meter with 2 wood group settings all woods are put into those two settings depending on the oven dry results. When you have a moisture meter such as the Lignometer K which has 150 different wood groups there is a much finer calibration so you will get a more accurate reading depending on the wood species.

Lignomat offers free oven dry testing for any wood that we have not tested in the past.

For this case study we did not have a setting for Timbauba so the inspector was asked to send in a few pieces of wood no more than 6″ long so that we could establish the proper Lignometer K setting for his wood. 

After the oven test the results were as follows:

Warped piece of wood measured 8%

Unwarped piece measured 8.7%

This obviously shows that the readings that were taken with the wrong settings were inaccurate. After the oven dry test is done a calibration for the moisture meter is established. 

Nobody needs to wonder why the warped wood tested with such normal moisture contents. Lets assume the wood floor was delivered, not tested, and installed at a higher moisture content than 6-9%. As the wood dried out, it warped and then when tested it showed the right low MC.

Make sure to give Lignomat a call if you are having problems finding the correct wood species settings. We can help.

800-227-2105

sales@lignomat.com

Why is Wood Shrinking and Cupping?

Wood movement occurs, when the moisture in wood changes. Then, floors are cupping, table tops delaminating, veneer is checking and boards are warping.
No shrinking and warping will occur, when an equilibrium with the surrounding air has been reached, which means wood is not losing or absorbing any moisture. 
The EMC chart below lists stable wood moisture 
values between 2.3% and 24.3% for ambient conditions of 10-95% RH at temperatures of 30-1000F. According to the chart, wood at 10.1% will not shrink or warp, if the relative humidity remains at 55%.
Besides listing stable conditions, the EMC chart 
allows predictions and explanations:
For instance, if dry wood with a moisture content 
of 6% is exposed to 55% relative humidity at 700F, 
the wood will pick up moisture until 10.1% has been reached. Wood species, coating and exposure time determine how much moisture will actually be absorbed. However, at 55% relative humidity, wood 
can never pick up more moisture than 10.1%. 
An all important pair of tools: Hygrometer and wood moisture meter
No more surprises!
Measure and compare wood moisture and relative humidity with the EMC chart to predict, if wood is stable or will loose or gain moisture. 

 

December Newsletter 2015 Seasonal Changes in Wood Moisture

 

December 2015,

Issue No. 16

AT A GLANCE

*Common Moisture Problems in Woood

* How Seasanol Changes in Humidity Affects Wood

Interesting Websites

How to Prevent Wood Floor Gaps in Winter

(see more)

Understanding, Preventing, Detecting and Correcting Moisture in Concrete Floors

(read more)

Keep in Touch:

PHONE: (800) 227-2105

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FAX:      (503) 256-3844

WEB:

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Upcoming Trade Shows

Surfaces Trade Show in Las Vegas January 20th-22

Come visit our booth #4257

Click here for more information

World of Concrete Show in Las Vegas February 2-5 Come Visit our booth #S11655

Click here for more information

Common Moisture Problems in Wood

Wood is an ideal raw material: long lasting, sturdy, easy to shape, join together or glue and is continuously renewed.  Above all, wood is beautiful.  Everybody likes its durability, texture, looks, touch, color and unique design.

Wood is used in many different applications – from structural building components to hardwood flooring, from furniture to toys for kids, from cabinets to musical instruments.

The challenge of woodworking starts with choosing the right wood.  If the wood is not right for the application, the best tools and excellence in workmanship cannot guarantee a high quality product.  Wood species, grade and moisture content determine quality and usefulness of wood.

Common Moisture Problems

A chair with loose joints or a cabinet door that will not close.  A  butcher-block table with a big crack down the middle or a veneered surface that shows surface checks. Edge banding applications where the glue line fails.  A jewelry box with crooked joints and bent out of shape, cupped floors, foggy finishes, etc.

During air and kiln drying moisture defects such as case hardening, honeycombing, split ends or surface checks can occur. If wood is not properly stress-relieved, internal stress within the board can be suddenly released when a board is cut.

Moisture defects are irreversible. Immense stress within the wood permanently deforms or destroys the structure of the wood (cracking, checking, warping, honeycombing).    

Shrinkage between 18% and 6% in Red Oak.

At the beginning of the test both pieces ( 1 1/4” x 4”) had the same size and the same moisture content of 18%. The upper piece dried down to 6%, whereas the lower piece was kept at the 18% moisture level.

Why Moisture Problems Occur

Wood is not a homogeneous material, but structured by year rings, which form a series of more or less concentric cylinders. These cylinders consist of irregular tubes that transport nutrients and support the tree.Interaction with

Air:  When wood absorbs or looses moisture below the Fiber Saturation Point (28%-35%), the tubes expand or contract, causing wood to swell or shrink.  To the woodworkers dismay, shrinking and swelling is often accompanied by warping. Shrinking does not occur lengthwise along the tubes.

Changes in the wood moisture content occur until an equilibrium with the surrounding air has been reached.  At that point the equilibrium moisture content (EMC) of air is the same as the wood moisture content (MC).If wood pieces with different moisture contents were placed for a long time in a constant climate of 700F and 35% relative humidity, all wood would end up with a moisture content of 7% independent of the wood species or the initial moisture content.

Since 700F and 35% – 45% relative humidity represent normal in-home conditions, hardwood floors and furniture built with a moisture content of  6-8% is stable.

Shrinkage and Warping

1a) Arrows indicate radial shrinkage

1b) Arrows indicate tangential shrinkage

1C) Quarter sawn board with straight year rings parallel to the edges

Year Rings:  Each board has a unique year ring pattern (grain), dependent upon its position in the log.

Shrinkage and warpage vary with wood moisture and with the arrangement of year rings.

Shrinkage:  Whenever wood below Fiber Saturation Point looses moisture, it shrinks. By actually measuring the shrinkage in a block of wood, it has been found that shrinkage is not uniformly the same in all directions, but differs with the grain. Tangential shrinkage along the year rings is twice as much as radial shrinkage across the year rings. The different shrinkage factors within the same board cause warping by pulling the board in different directions.

Warping: In most cases shrinking is accompanied by warping. Warping deforms boards by cupping, crowning, bowing, twisting or a combination of all four.2a)   2b)    2c)   2a)    Twisting: Curved diagonally across the board2b)    Bowing: Curved along the length of the board

2c)    Cupping: Curved downwards along the width of the board                                           Crowning: Curved upwards along the width of the board. The drawings above indicate the main deformations of a board. For instance, when a wood floor gets excessively wet the floor planks absorb extra moisture and swell. Since there is not much room to expand problems become obvious very fast.

How Seasonal Changes in Humidity Affect Wood.

When wood is exposed to different temperatures and different RH of the air it will either absorb moisture or it will lose moisture. Thus, with the changing seasons wood can absorb or lose moisture. EMC is Equilibrium Moisture Content. The EMC is what the moisture content of the wood will be when the wood will not lose or absorb moisture due to temperature and RH. RH has a much bigger effect on wood than temperature. Click here for a table. The following are different scenarios that occur during the seasons:

Summer, Hot and High Humidity:

 With high RH and high temperatures wood will absorb moisture.  Wood always want to be at an equilibrium with the air. If there is a lot of moisture in the air the wood will absorb moisture until the EMC is reached; glue lines will fail, wood floors start buckling, etc. 

Summer, Hot and Low Humidity: 
With low RH and high temperatures wood will lose moisture. 
Winter, Cold and High Humidity: 
With high RH and low temperatures wood will absorb moisture. The wood will gain moisture due to RH and lose a little moisture due to temperature. 
Winter, Cold and Low Humidity: 
With low RH and low temperatures wood will lose moisture.  This will cause the most shrinkage. 

 

 

October Newsletter 2015 Ligno-DuoTec BW in-situ probe RH test

 

October 2015,

Issue No. 15

Interesting Websites

The cure for concrete moisture and PH Ills

(see more)

Understanding, Preventing, Detecting and Correcting Moisture in Concrete Floors

(read more)

Keep in Touch:

PHONE: (800) 227-2105

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FAX:      (503) 256-3844

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www.lignomatusa.com

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October Sale on all Moisture Meters

Now is a good time to buy. The sale prices are good through October 31st.

Using the Ligno-DuoTec BW moisture meter for in-situ probe measurements in concrete.

The Ligno-DuoTec BW is a dual-depth pinless meter for wood floors, bamboo, and gypsum. The meter in pinless mode also gives comparative readings of concrete and other materials (Photo 2).

The Ligno-DuoTec BW meter can be used with the RH BluePeg Probes to measure ambient conditions of air and in-situ RH probes in concrete.

Image 1: Taking an RH measurement with the Ligno-DuoTec BW. Using ASTM F2170 standard. Easy and accurate measurements can be taken with a 3 mm connector RH cable.

Image 2: Pinless readings are taken when scanning the concrete surface. A great strategy to us to find where to set your probes when taking in-situ probe readings. 

However when only using the pinless moisture meter to evaluate concrete there are some major disadvantages. Any pinless meter is limited because the measuring depth is only ¾” . Moisture below the ¾” measuring depth is not included in the pinless measurements.

If problems with high concrete moisture are present a greater measuring depth is required to detect the higher moisture levels. In most cases the moisture in a concrete floor is highest 40% down into a concrete slab.  The in-depth RH Probes are able to reach deep enough to detect hidden internal moisture in concrete slabs. Flooring failure is often caused when the internal moisture raises to the surface once the concrete slab is covered.

The following photo shows all parts necessary to perform an RH test (vacuum or shop vac is not in photo)

1 Ligno-DuoTec BW moisture meter indicating RH and Temperature measurements,

RH Cable,

RH BluePeg Probes,

Sleeves (caps not in photo)

Plus attachment to vacuum inside the hole and a

Brush to clean hole before inserting sleeve.

After all parts are on site, the number and location of the measuring points is established. Each hole is drilled with a 5/8” drill bid, cleaned and brushed out. Plus the sleeve is inserted and the cap put in place before the next hole is drilled.

Each hole is drilled with a 5/8” drill bit, cleaned and brushed out. Plus the sleeve is inserted and the cap put in place before the next hole is drilled.

The Lignomat sleeves can be pressed into the hole by using your hands. Using a wooden block or a rubber mallet makes inserting the sleeves easy. The numerous ribs on the side of the sleeve and the lip on the top of the sleeve assure a tight fit, where no air from the hole can escape once the cap is in place. 

At any time after the sleeves have been set, the RH BluePeg Probes can be inserted.

The red cap is used once the RH BluePeg Probe is inserted to mark the location of sleeves, which have the RH BluePeg Probe inside.

For a pretest the probes can be inserted within an hour of drilling the holes. RH measurements after a few hours give a good indication of the moisture range in the concrete slab.

If it is established at that time that the concrete needs more drying time, the RH probes can be removed from the holes and used for later testing.

Once the cable is connected to the meter, the READ key can be depressed and the RH value is indicated. The number on the left side of the display indicates the individual RH BluePeg serial number. This allows for easy tracking of the RH BluePeg Probes.

To obtain temperature readings, simply depress the down key and the temperature is indicated.

To remove the cable, hold the black cable-end plug in place and pull on the cable. The RH BluePeg Probe is disconnected from the cable. Cable and cable-end-plug can be removed, without removing the Rh BluePeg Probe.

If the RH BluePeg Probe should be removed, connect the cable again and pull the RH BluePeg Probe out of the sleeve.

The RH Probe can be used now for further testing.

The Ligno-Duotec BW is a great meter for floor installers and inspectors. All-important moisture testing functions for flooring installations and inspections are built-in.

A further step up is the Ligno-VersaTec,  which has all features of the Ligno-DuoTec BW plus, an external electrode can be connected for measurements in pin mode. 

 

 

May 2015 Lignomat Newsletter Wireless Monitoring of Moisture

 

May 2015,

Issue No. 13

Interesting Websites

Cleanfax article on Lignomat Data Logging system

(see more)

Woodworking Network article

(read more)

Keep in Touch:

PHONE: (800) 227-2105

            (503) 257-8957

FAX:      (503) 256-3844

WEB:

www.lignomatusa.com

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NWFA Convention

Thank you all who visited our booth at the NWFA show. We had another great show this year. Grete and Uli were very busy and really enjoyed talking to new and existing customers. 

New Website

If you haven’t already seen it we have finally launched our new website. This may have taken longer than expected however it is here and we have already gotten some great feedback. We would like to get some customer testemoials posted on our website. . Please email me at sales@lignomat.com with a testimonial and I will post it on our website with a link to your site. Thank you

http://www.lignomat.com

Wireless Moisture Monitors and Data Loggers

On-site or with remote Access

With over 40 years of experience we are one of the industry leaders in measuring moisture accurately and reliably. This knowledge was combined with the latest wireless technologies to develop the data logger BL2 series and the wireless monitoring systems.

Our monitoring systems can measure:

wood moisture, bamboo, gypsum, sheetrock, solid materials

relative humidity and temperature, DPT, GPP, EMC

EMC

concrete moisture using in-situ RH probes ASTM F 2170

Surface and interior temperature


Lignomat’s wireless systems can be used as stand alone data loggers or implemented in any control process where moisture relative humidity and temperature needs to be measured. We have been manufacturing wireless transmitters for control systems in lumber dry kilns for over 15 years.

Memo Chip BL2

Humidity data loggers provide more information than single readings from a thermo-hygrometer. Install a BL2 to keep track continuously.

–Relative humidity and ambient temperature

–DPT (dew point temperature)

–GPP (grains per pound)

–EMC (equilibrium moisture content for wood)

–Add MC Tracker to simultaneously record 1 RH probe and 3 wood
moisture measuring probes.


When humidity matters: Each BL2 comes with the high-precision RH BluePeg Probe with long-term stability. The detachable RH Probe allows for inwall, in-depth monitoring. LED lights and audible alarms can be set to indicate out-of-range values. Selectable time-interval 30 sec to 24 hrs.

The BL2 records 16000 data sets. Reports show:

Relative Humidity, Temperature, Grains per Pound, Dew Point and EMC .


Specifically for Contractors and Restoration Specialists:

For job-site surveillance and long term monitoring. Alarms can be set to alert when unwanted conditions occur. Extension cables (standard stereo cable and 3.5mm connector) allow mounting the RH probe where it can best measure and the BL2 where it can be reached easily.

Specifically for Wood: For customers concerned about wood moisture we added EMC values plus an EMC alarm. The alarm will sound when the humidity gets lower or higher than the preset alarm EMC value.

The Wireless Moisture-Log System

Allows for uninterrupted data acquisition of

 Wood moisture, Wood Temperature, EMC
 Moisture of Drywall, Insulation and other Building Materials
 Relative Humidity / Air Temperature
 Concrete Moisture using in-situ RH Probes

Reports can be viewed on-site or anywhere in the world via Internet.
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Advantages of Lignomat’s Wireless System


• Accuracy and Reliability

Lignomat is one of the industry leaders in measuring moisture accurately and reliably. This knowledge was combined with the latest wireless technology to develop Lignomat’s transmitters and receivers.

• Proven technology

Lignomat’s customers have used wireless transmitters to measure and control wood moisture, humidity and temperature inside lumber dry kilns and predryers for the last 16years.

• Single and Multiple Function Transmitters

Transmitters of various combinations are available to provide solutions for the many applications, where for moisture, humidity and/or temperature need to be measured.

• Long Range Data Transmission

Transmitters can be placed anywhere within the test area. Distance between transmitters and receivers can be up to 1000 ft line of sight. Two or more receivers can be connected to reach beyond 1000ft.

• Flexible and Adaptable

Applications range from lumber drying, to restoration, to material testing in labs. Lignomat offers a variety of sensors and probes to fit different applications. All sensors and probes are detachable and interchangeable – and can be connected by cables if necessary.

• Reviewing and Reporting

Completely automatically and continuously, with a real time stamp – no time taking notes and no interruption of reporting when you are not on-site. Reports are available on-site or at a secure Web-server.

Special offer for May and June

BL2 Data logger package  Special Price – $149.00   Regular – $187.00

MC Tracker with BL2       Special Price – $369.00   Regular – $420.00