ASTM C1789-14(2018) PDF

Scope: 1.1 This test method applies to the calibration of handheld moisture meters for gypsum board, glass faced gypsum panels and fiber-reinforced gypsum panels by means of electrical conductance and dielectric meters. The test uses wetted test specimens which are dried down in at least 5 steps to determine the moisture content based on the weight loss in comparison to the dry weight. The test also supplies the ERH values for each of the drying steps. 1.2 This test method has not been evaluated for the influence of paint or wall covering materials on the indicated moisture content of a gypsum board or panel substrate. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

ASTM C1789-14(2018) Referenced Document

ASTM C1177/C1177M Standard Specification for Glass Mat Gypsum Substrate for Use as Sheathing
ASTM C1178/C1178M Standard Specification for Glass Mat Water-Resistant Gypsum Backing Panel
ASTM C1278/C1278M Standard Specification for Fiber-Reinforced Gypsum Panel
ASTM C1396/C1396M Standard Specification for Gypsum Board*， 2024-04-20 Update
ASTM C473 Standard Test Methods for Physical Testing of Gypsum Panel Products*， 2019-10-01 Update
ASTM D4442 Standard Test Methods for Direct Moisture Content Measurement of Wood and Wood-Base Materials
ASTM D4444 Standard Test Methods for Use and Calibration of Hand-Held Moisture Meters

2024 ASTM C1789-24 Standard Test Method for Calibration of Hand-Held Moisture Meters on Gypsum Panels
2018 ASTM C1789-14(2018) Standard Test Method for Calibration of Hand-Held Moisture Meters on Gypsum Panels
2014 ASTM C1789-14 Standard Test Method for Calibration of Hand-Held Moisture Meters on Gypsum Panels
2013 ASTM C1789-13 Standard Test Method for Use and Calibration of Hand-Held Moisture Meters on Gypsum Panels