thermograph correction card

thermograph correction card

[′thər·mə‚graf kə′rek·shən ‚kärd]
(engineering)
A table for quick and accurate correction of the reading of a thermograph to that of the more accurate dry-bulb thermometer at the same time and place.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.