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Significance and Use
The transmittance of an attenuating medium can cause errors for an infrared thermographer using an infrared imaging radiometer to measure the temperature of a specimen through the medium. Three test methods are given for measuring and compensating for this error source.
A test method is given for measuring the transmittance of an attenuating medium.
A test method is given for compensating for errors when measuring the temperature of a specimen having a known emissivity through an attenuating medium with a known transmittance.
A test method is given for measuring and compensating for transmittance and emissivity errors when the specimen temperature is known.
These test methods can be used in the field or laboratory using commonly available materials.
These test methods can be used with any infrared radiometers that have the required computer capabilities.
1.1 These test methods cover procedures for measuring and compensating for transmittance when using an infrared imaging radiometer to measure the temperature of a specimen through an attenuating medium, such as a window, filter or atmosphere.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
1.3 These test methods may involve use of equipment and materials in the presence of heated or electrically-energized equipment, or both.
1.4 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E1316 Terminology for Nondestructive Examinations
ICS Number Code 17.200.10 (Heat. Calorimetry)