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Batches/Lots

Quality Control Data

The fabric used as Energy Test Cloth is specified in the U.S. Federal Register. We have been supplying the official Energy Test Cloth since lot 18 (labelled as “wfk lot 002”). We check the quality of the material we ship constantly and have the fabric externally analysed before any samples are sent out for the official approval testing (i.e. approval and establishment of correction coefficients, see below). The list and links below give you access to our batch specific QC data and quality certificates:

Correction coefficients

The Correction Coefficients for different DOE Energy Test Cloth lots can be found on the official DOE server, or mirrored here on the WFK server (including latest updates): For your convenience we make calibration data and correction coefficients available here for you to download.