Calibration of fire resistance furnaces with plate thermometers
Furnace testing is a very common method of assessing the fire resistance of building elements. Due to differences in design, various furnaces may expose the specimen to heating conditions that differ although the same standardised test method is employed. To avoid the problem the so-called plate thermometer has been suggested by SP to be used for measuring temperature and controlling the heating impact on the test specimen. SP has also proposed a design for calibration elements and a related calibration procedure. BCR has decided to support a project for evaluation of the proposed procedure in the vertical furnaces at four different EGOLF laboratories. This report gives background information and summarises the results from the inter-comparative tests, which show that the difference in thermal impact in different furnaces can be considerable, when the furnaces are controlled by means of ordinary thermocouples. This difference decreases when the furnaces are controlled by plate thermometers. The exercise also shows that the temperature distribution in a furnace can be assessed by the proposed calibration procedure, and that the actual temperature distribution in some furnaces can be far from homogeneous.
Bibliographic Reference: EUR 14555 EN (1993) 127 pp., MF, ECU 8, blow-up copy ECU 21.50
Record Number: 199310425 / Last updated on: 1994-11-29
Original language: en
Available languages: en