THERE’S AN APP FOR THAT


Jason Spangler, Wagner Meters’ sales manager, outlines how the use of handy apps and tools can save contactors’ time when testing concrete moisture.


Concrete drying time is always the big variable with large flooring jobs. How long will it take, especially when different areas of the slab could dry at different rates?


When planning out a big job there are a number of questions you need to ask yourself:


• How many concrete moisture sensors do I need to install? • Where should I place the sensors? • How long will it take to install them? • How much time will it take to capture readings for each one?


You need to invest the time to make sure this job gets done right, but you don’t have all the time in the world. Other projects need your attention too.


A new digital tool, the DataMaster L6 mobile app – for use with the Rapid RH L6 system – can help you answer those questions and significantly cut down the time you spend on the moisture testing process.


HOW MANY SENSORS DO I NEED


TO USE ON MY JOB? Let’s look at the ASTM F2170, the international standard test method for concrete flooring using in situ probes. Complying with this standard can only mean good things for your project.


ASTM F2170 requires you to install three relative humidity (RH) sensors for the first 100m2 for each additional 100m2


. Now, let’s do the maths. and then one more sensor


How many sensors would you need to install in a 1,000m2 concrete floor? The answer is 12. Three sensors for the first 100m2


and then nine more for the additional 900m2 WHERE SHOULD I PLACE


THE SENSORS? Calculating how many sensors you need to install to comply with ASTM F2170 is straightforward. Where to place them is less so. F2170 gives some guidance on where the sensors should be located, but it’s not a precise calculation. You need to make the sensor location decisions.


You want sensors spread out so you get a complete picture of the slab’s moisture condition. The DataMaster L6 mobile app helps you map out exactly where you should place the sensors across the slab. You can upload the floor plan to the app and use it to determine where to space out the sensors.


With the floor plan uploaded, you can easily create a sensor map within the DataMaster app. No more running around trying to find where your sensors are. Every time you take a first reading for a Rapid RH L6 sensor, it creates a location pin on the floor plan in the app. Now you have a sensor map.


The sensor map is outstanding; you’ll never overlook a sensor again. But how much time does it take to get readings from every sensor?


HOW CAN I GET FAST READINGS


USING THE DATAMASTER APP? The fastest way to collect data from each Rapid RH L6 sensor is to use the optional L6 DataGrabber with Bluetooth devices, along with the DataMaster app, And, no crawling around on the floor to get readings is required.


Here’s how it works: The DataGrabber device sits inside the L6 sensor. The DataGrabber takes a reading at intervals defined by you. That’s right – the DataGrabber is collecting readings and you’re not even on the job site.


To collect the data, though, you will have to be onsite. Just walk the job site with your mobile device’s Bluetooth on. Once you choose a DataGrabber that is in Bluetooth signal range, it sends the collected data to the DataMaster app in your hand.


How much time does it take you to stop at each sensor, crouch down, get the reading, and then write the reading down on the sensor report? Cut that time by 90% when you use the DataGrabber with Bluetooth and the DataMaster L6 app.


On a large job, it can be tempting to install fewer sensors than needed. That might seem like an easy way to save time and money. But it’s a risky move, and you won’t be complying with ASTM F2170.


The DataMaster L6 app saves time and helps you map out where to place your RH sensors so that you can get a complete picture of the slab’s moisture condition.


34 | TOOLS, ACCESSORIES & WORKWEAR


It’s much better to automate the data collection process using the DataGrabber with Bluetooth and the DataMaster app. You can gather more sensor data, even on large jobs, while spending less time on the job site. All in full compliance with ASTM F2170 guidelines.


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