EMF values, Tolerances

The EMF values as a function of temperature and the corresponding tolerances of W.C. Heraeus precious metal thermo-wires comply with the following current international standards

DIN-IEC 584 Parts 1 and 2
BS 4937
NBS ASTM .E.230
NFC 42.321
JIS 1602

Classes of the limiting deviations for thermo-wire couples according to DIN-IEC 584 Part 1 ( Temperature of comparative point = 0 ^oC

Class 1 2 3         Limiting deviations ( in each class the higher value is applicable ) 1oC or {1+(T-1100)*0.003}oC 1.5oC or {0.0025*T}oC 4.0oC or {0.005*T}oC Range of application       Type R,S oC to +1600oC oC to +1600oC - Type B - +600oC to 1700oC +600oC to 1700oC

EMF values and limiting deviations of W.C. Heraeus thermo-wire couples according to DIN-IEC 584 Part1 ( Temperature of comparative points = 0 ^oC ) for T₆₈ T=1200^oC

Type EMF EMF/dt Class 1 Tolerance Class 2 Tolerance Class 3 Tolerance [ V] [ V/oC ] [ V or oC ] [ V or oC ] [ V or oC ]             R 13224 14.0 14 V 0. 1oC 42 V 0. 3.0oC - S 11947 12.0 12 V 0. 1oC 36 V 0. 3.0oC - B 6783 11.0 - 40 V 0. 3.0oC 63 V 0. 6.0oC

EMF values and limiting deviations of W.C. Heraeus thermo-wire couples according to DIN-IEC 584 Part1 ( Temperature of comparative points = 0 ^oC ) for T₆₈ T=1554^oC

Type EMF EMF/dt Class 1 Tolerance Class 2 Tolerance Class 3 Tolerance [ V] [ V/oC ] [ V or oC ] [ V or oC ] [ V or oC ]             R 18202 14.0 20 V 0. 1.4oC 45 V 0. 3.9oC - S 16224 12.0 17 V 0. 1.4oC 47 V 0. 3.9oC - B 10721 11.5 - 45 V 0. 3.9oC 91 V 0. 7.8oC