ASTM D3259-95
(Practice)Standard Practice for Infrared Determination of the Temperature of Applied Coatings on Wood Products During the Curing Cycle
Standard Practice for Infrared Determination of the Temperature of Applied Coatings on Wood Products During the Curing Cycle
SCOPE
1.1 This practice is intended to serve as a guide in measuring with infrared instruments the temperature during the curing process of coatings applied to wood products.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D 3259 – 95
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Practice for
Infrared Determination of the Temperature of Applied
Coatings on Wood Products During the Curing Cycle
This standard is issued under the fixed designation D 3259; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope Only instruments that have been evaluated are included in this
practice.
1.1 This practice is intended to serve as a guide in measur-
ing with infrared instruments the temperature during the curing
3. Apparatus
process of coatings applied to wood products.
3.1 The method of measurement has changed to virtually all
1.2 The values stated in inch-pound units are to be regarded
non-surface contact measurement devices. Such devices may
as the standard. The values given in parentheses are for
be portable (land held) with nearly instantaneous readout or
information only.
stationary with a remote readout.
1.3 This standard does not purport to address all of the
3.2 Modern devices come equipped with an automatic
safety concerns, if any, associated with its use. It is the
emissivity compensation system.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
4. Procedure
bility of regulatory limitations prior to use.
4.1 Calibration—Calibrate each instrument according to the
instructions of the manufacturer. A standard blackbody capable
2. Significance and Use
of being controlled at various temperatures is almost essential
2.1 The forest products finishing industry has encountered
for calibration. One such blackbody is a modified hot plate
difficulties in measuring the temperature of painted surfaces
with a ⁄2-in. (13-mm) thick aluminum plate and a ventilated
prior to, during, and after the curing process. The use of
cowling to minimize the effects of ambient drafts. A dial
thermocouples is not entirely satisfactory because the thermo-
thermometer with its stem within the aluminum plate serves to
couple wires tend to conduct heat away too rapidly from the
monitor the temperature of the blackbody.
area where the temperature is being measured. Infrared radia-
4.2 Operation:
tion thermometers that are simple to operate can circumvent
4.2.1 Detailed instructions on the operation of each instru-
t
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Section
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Note 1: This test method is suitable for use at other temperatures and at lower kinematic viscosities, but the precision is based on determinations on liquid asphalts and road oils at 60 °C [140 °F] and on asphalt binders at 135 °C [275 °F] only in the viscosity range from 30 to 6000 mm2/s [cSt].
Note 2: Modified asphalt binders or asphalt binders that have been conditioned or recovered are typically non-Newtonian under the conditions of this test. The viscosity determined from this method is under the assumption that asphalt binders behave as Newtonian fluids under the conditions of this test. When the flow is non-Newtonian in a capillary tube, the shear rate determined by this method may be invalid. The presence of non-Newtonian behavior for the test conditions can be verified by measuring the viscosity with viscometers having different-sized capillary tubes. The defined precision limits in 11.1 may not be applicable to non-Newtonian asphalt binders.
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