GreenFiber Core Sampling Kit - Insulation Density Testing
The Original GreenFiber Insulation Testing Kit
Kit Includes:
- (1) Delmhorst P-2000 Moisture Meter
- (1) Delmhorst 19-E Blade Type Electrode
- (1) Sampling Tube and Ejector
- (1) Sample Container with Lid
- (1) Hole Saw
- (1) Weight Scale
- (1) Carrying Case
Checking for Installed Density
The GreenFiber core sampling kit included a weight scale, coring tools, core plunger, sample holder, Delmhorst P-200 meter and 19-E electrode, and weight / density conversion matrixes. The matrixes were developed to determine the dry density using the reading of the meter and the wet core weight of the sample.
To use the coring tool the Operator will use a battery powered drill that is not included. A 14 to 18 volt drill with a fast / slow selector is required. The sample locations are best taken in the middle 1/2 of the cavity, keeping in mind that one must select an area where a full sample can be taken.
- Follow Delmhorst's Guide for Calibration (See manual)
- Verify the meter is set to the second scale (*), if it needs to be charged, hold down the button until the (2) is displayed.
- Insert the external probe into the cavity along the side of the stud until the back edge becomes flush with the stud. (Note: Be as careful as possible to keep the blades against the stud as the blades are inserted in the product, to prevent an air gap from the forming between the blade and material.)
- Hit the read button (largest button with water drops on it)
- Hold probe in cavity until reading is displayed.
- Record Reading (Note: If the reading is flashing "100" then the scale has maxed out and the reading should not be used.)
Take a core sample as near as the reading as possible to produce the most accurate results. Switch the drill speed to the slowest setting. Load the coring tool in the drill. With the coring tool as level as possible, continue slowly into the cavity until the tool is in full contact with the dry wall or the tool cuts through the netting. It is important that the speed of entry of the coring tool starts slowly and maintains a slow steady speed all the way to the back of the cavity.
Slowly slide the coring tool out of the wall, without the drill running. Place the sample holder on the weight scale and press the "Zero" button. Disconnect the coring cylinder from the it's base by twisting the cylinder. Push the material out of the cylinder, with the core plunger, into the holder. (For regulated walls, read the weight and document the data on the density control log.) Then use the appropriate weight / density conversion matrix to determine the dry density with the wet core weight and meter reading.
To replace the product that has been taken for the samples, pack the core cylinder full with the tested material and excess loose material. Slide the cylinder in the wall until it is fully inserted. Using the plunger, push the material inside the tube while removing the cylinder. Brush off the extra material that protrudes beyond the studs. Note: Use the longer coring device with cavities larger than 9 inches in depth.
Checking for Moisture Content
The Delmhorst P-2000 moisture meter and 19-E electrode can be used to determine the moisture in the wall. The meter is calibrated to ASTM D644 using the original weight method for calculating the moisture content. The meter reads the highest point of electrical conductance between the material and the electrode. This meter and electrode has been tested with the US GreenFiber INS735 and FRM100 products; it's accuracy among other materials has not been tested using this method. Thus the meter is going to determine the highest of the highest moisture content of the sample that is in contact with the electrode, not the average of the sample in contact with the probe. The use of this meter to determine the limit of the when the material has dried to be allowed covered is under development and these instructions will be amended as soon as the procedure is developed for it.
- Follow Delmhorst's Guide for Calibration (See manual)
- Verify the meter is set to the third scale (*), if it needs to the changed, hold down the button until (3) is displayed.
- Insert the external probe into the cavity along the side of the stud until the back edge becomes flush with the stud. (Note: Be as careful as possible to keep the blades against the stud as the blades are inserted in the product, to prevent an air gap from the forming between the blade and material.)
- Hit the read button (largest button with water drops on it)
- Hold the probe in cavity until reading is displayed (Note: If the reading is flashing "40" then it has maxed out the scale.)
