Moisture meter calibration for untreated and ACQ-treated southern yellow pine plywood

Samuel V. Glass; Charles G. Carll

doi:10.2737/FPL-RN-312

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Moisture meter calibration for untreated and ACQ-treated southern yellow pine plywood

Informally Refereed

Authors:

Samuel V. Glass, Charles G. Carll

Year:

2009

Type:

Research Note

Station:

Forest Products Laboratory

DOI:

https://doi.org/10.2737/FPL-RN-312

Source:

Research Note FPL-RN-0312. Madison, WI: U.S. Department of Agriculture. Forest Service, Forest Products Laboratory. 7 pages.

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Abstract

Conductance moisture meter readings using stainless steel screws as electrodes were compared with gravimetric moisture content for 1) southern yellow pine (SYP) dimensioned lumber, 2) untreated (underlayment grade) SYP plywood, and 3) SYP plywood treated with alkaline copper quaternary. Meter readings were taken with the meter set to the manufacturer-provided species correction for SYP. In the sample of dimensioned lumber used in this investigation, direct meter readings corresponded closely with gravimetric moisture contents. The manufacturer-provided correction for SYP wood was thus deemed adequate. In contrast, meter readings in plywood, whether treated or untreated, deviated substantially from gravimetric moisture content values. Calibration equations for the plywoods are thus presented for predicting gravimetric moisture content from moisture meter readings.

Keywords

Moisture meter, electrical conductance, moisture content, calibration, plywood, alkaline copper quaternary, southern yellow pine, southern pine, moisture

Citation

Glass, Samuel V.; Carll, Charles G. 2009. Moisture meter calibration for untreated and ACQ-treated southern yellow pine plywood. Research Note FPL-RN-0312. Madison, WI: U.S. Department of Agriculture. Forest Service, Forest Products Laboratory. 7 pages