Construction of blackbodies for calibration of noncontact thermometers in the range from -10/spl deg/C to 250/spl deg/C

In the paper a development of a blackbody for calibration of non-contact (radiation) thermometers is presented. The laboratory, was first accredited for calibration by comparison of contact thermometers and calibration baths and furnaces in the range from -55/spl deg/C to 1250/spl deg/C. As the national laboratory for temperature it also became a holder of national standards for the thermodynamic temperature thus providing the traceability of temperature in Slovenia. After a strong demand for calibration of non-contact thermometers was expressed mostly by the exporting oriented industry in Slovenia, the laboratory has started an establishment of a facility for calibration of radiation thermometers. The activities included an extensive training of experts, which have developed, written and implemented the procedures for evaluation and calibration of blackbody sources, and determined the best measurement capabilities achievable with the introduced calibration equipment.