ASTM International

Standard Test Methods for Standardization and Calibration of In-Line Dry Lumber Moisture Meters
 N D6782

Annotation

These test methods apply to instruments designed to detect, or measure, moisture in wood which has been dried below the fiber saturation point. The purpose of these tests is to provide a unified standard against which such systems can demonstrate their suitability for their intended use (see Appendix X1).

Sensitivity to thin layers of surface moisture such as caused by dew or brief rain exposure is not addressed by these methods. Applications, such as screening material for surface adhesion, may require additional assessment methodology and criteria (see Appendix X5).

The standard is configured to support tests by moisture meter manufacturers as well as end-users of such systems, therefore the text follows two tracks (see Appendix X2).

Test methods specified for manufacturers are generally designed for laboratory settings and are intended to provide a standard against which a manufacturer certifies calibration and general system conformance.

Test methods for end-users are generally designed for field settings and are intended as a standardized set of procedures for determining the suitability of a specific machine for a particular use.

Applications such as lumber marking or sorting systems utilizing the output of the in-line meter are not part of this standard.

Applications requiring sensitivity to and identification of localized wet areas are limited to general recommendations. The presence of wet-spots is the subject of Appendix X8.

The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.