The SMT Moisture Calculator App for Android devices allows any ohmmeter or mulitmeter to calculate the moisture content of wood and gypsum.

 

Note:

Readings from standard ohmmeters may not represent the true moisture content of your material. Dedicatedmoisture content meters are recommended for professional applications.

 

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Moisture Calculator Application

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  • Use a common ohmmeter or mulitmeter to calculate the moisture content of wood, gypsum or other building materials using the SMT Moisture Calculator App.

     

    • Using an ohmmeter or multimeter, select Ohms mode. If auto-range is unavailable, start with the 10Mohm range.
    • Insert the test leads firmly into the desired material spacing them approximately 25mm or 1 inch apart.
    • Adjust the range accordingly until the meter gives a consistent reading.  In the event of an out of range (OL) reading; increase the range.
    • Enter the reading into the resistance field in the app to convert to moisture content.
    • For improved accuracy, select the appropriate wood species/material and input the material temperature.
    • Use a Megger or Insulation tester to obtain readings in dry materials.

    • In wood, measure against the grain, avoid knots and joints.

    • For improved accuracy, perform measurements in both polarities as some materials inherently have a diode effect.