30 a second-class standard platinum rhodium platinum rhodium thermocouple is _ instrument

30 a second-class standard platinum rhodium platinum rhodium thermocouple 6 mainly as a standard, in 1100 - Temperature range of 1500 ℃ for temperature dissemination, second-class standard platinum rhodium - 30 Platinum, rhodium and thermocouple for temperature range of the precise temperature measurement. Second class standard platinum rhodium - 30 Platinum rhodium thermocouple (6 Hereinafter referred to as the standard dual platinum-rhodium thermocouple) The positive (, 英国石油公司(bp) 30% of containing rhodium platinum rhodium, the cathode ( bn) 6% of containing rhodium platinum rhodium. Second class standard platinum rhodium - 30 Platinum-rhodium thermocouple 6 main technical parameters, main technical parameters of model name precision grade WRRB - Two second-class standard platinum rhodium - 30 Platinum rhodium thermocouple second-class e (6 1100℃) = 5. 780 soil 0. 025mve( 1500℃) = 10. 099 and 0. Mv second-class standard platinum rhodium 30-040 The stability of the platinum rhodium thermocouple 6, is decided by its thermoelectric potential changes in 1500 ℃, the annual change quantity does not exceed 18 mu v.