What is BS EN 62460 - Electromotive force (EMF) tables about?
BS EN 62460 specifies the equations and reference tables relating temperature to EMF (electro-motive force) for Gold versus Platinum and Platinum versus Palladium thermocouples. For information and convenience of use. BS EN 62460 also provides the approximate equations for temperature as functions of EMF.
Temperatures in BS EN 62460 are based on the International Temperature Scale of 1990 (ITS-90). They are expressed in degrees Celsius, symbol t90. Values of EMF, symbol E/μV, are given in microvolts.
The tables and equations in BS EN 62460 are intended for use with thermocouples made from elements of purity not less than 99.999 % for Platinum and Gold and of 99.99 % for Palladium, by weight.
Note1: Tolerances on initial values of EMF versus temperature have not been established for the thermocouples in BS EN 62460. Where required, these tolerances should be agreed between the wire manufacturer and the user.
Note2: BS EN 62460 does not cover extension or compensating wires for use with the pure-element thermocouples.
Who is BS EN 62460 - Electromotive force (EMF) tables for?
BS EN 62460 on electromotive force tables for pure-element thermocouple combinations is useful for:
- Manufacturers of thermocouples
- Industries that use thermocouples:
- Power generation
- Food processing
- Automotive
- Aerospace
Why should you use BS EN 62460 - Electromotive force (EMF) tables?
The following tables are included in BS EN 62460:
- Gold versus Platinum: EMF at intervals of 1 °C
- Gold versus Platinum: temperatures at intervals of 10μV
- Gold versus Platinum: thermoelectric values at the fixed points of the ITS-90
- Platinum versus Palladium: EMF at intervals of 1 °C
- Platinum versus Palladium: temperatures at intervals of 10μV
- Platinum versus Palladium: thermoelectric values at the fixed points of the ITS-90
The definitive equations of EMF, E/μV, as functions of temperature, t90/°C, which are used to generate the tables for Gold/Platinum thermocouples and for Platinum/Palladium thermocouples are given in BS EN 62460.
Overall, BS EN 62460 provides approximate equations for information and convenience in use for the respective thermocouples within the stated error limits.