DETERMINATION OF THE STABILITY OF CABLE THERMOCOUPLES AT THE UPPER LIMIT OF THEIR WORKING TEMPERATURE RANGE

被引：1

作者：

Ulanovskii, A. A. ^{[1
]}

Kalimulina, S. I. ^{[2
]}

Belenkii, A. M. ^{[2
]}

Bursin, A. N. ^{[2
]}

Dergausova, L. N. ^{[2
]}

机构：

[1] Obninsk Thermoelect Co, Obninsk, Russia

[2] Natl Res Technol Univ, Moscow Inst Steel & Alloys NITU MISiS, Moscow, Russia

来源：

METALLURGIST | 2011年 / 54卷 / 9-10期

关键词：

temperature; furnace; cable thermocouple; thermo-emf; stability; drift;

D O I：

10.1007/s11015-011-9352-3

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

One important factor in using cable thermocouples to monitor temperature changes in a furnace and in the semifinished products being heated in the furnace is the stability of the thermo-emf of the thermocouples over the entire heating operation. Drift of the thermo-emf at the upper limit of the working range is unavoidable at temperatures of 1200-1300 degrees C. A study is made of the stability of the calibration curves of heat-resistant K-and N-type cable thermocouples 1.5 and 3.0 mm in diameter when they are annealed in air at 1200 degrees C. It is found that the thermo-emf undergoes significant drift and exceeds the range of values allowed by the standard GOST R 8.585-2001 for these types of thermocouples. It is also established that there is appreciable shunting of the thermocouple signal on the intermediate section of the cable above 1000 degrees C.

引用

页码：641 / 646

页数：6