FIXED POINT CALIBRATING METHOD FOR NOBEL METAL THERMOCOUPLE

Japanese Patent JP3113813

B2

PROBLEM TO BE SOLVED: To measure a thermoelectromotive force value at real melting point of Pd by performing argon displacement after the surroundings of a Pd part bridged to a hot junction is evacuated below 1pa after its temperature is lowered to a melting point or below with an electric furnace whose temperature is 1500°C or above.
SOLUTION: In an alumina tube 13, two thermoelectric couple element wires 26 are made to pass through an insulating tube 25, and an R thermoelectric couple 28 wherein a Pd wire 27 is attached to a hot junction of its tip in a bridging manner is inserted, and the part between the upper end opening and the insulating tube 25 is sealed with epoxy system double fluid bonding agent 29. And a zero junction of the R thermoelectric couple 28 is put in an ice point 30, and lead wires 31 are connected, respectively, for starting measurement for thermoelectromotive force with a fixed point correcting device. For example, after temperature of the electric furnace is set at 1545°C and the inside of the device is deaerated with a vacuum pump, and a two-direction change-over valve 22 is changed to supply argon gas into the device with an argon gas supply pipe 23 for filling up, and the temperature at which the Pd wire 27 melts is measured with the thermoelectromotive force of the R thermoelectric couple 28.

Haruki Yamazaki
Tokio Hamada

JP5877696A

December 04, 2000

March 15, 1996

Click for automatic bibliography generation  

Tanaka Kikinzoku Kogyo Co., Ltd.

G01K15/00; (IPC1-7): G01K15/00

JP55151232A
JP1284718A
JP5514446B2

Previous Patent: クランプ金具

Next Patent: METHOD AND DEVICE FOR INFORMATION RETRIEVAL, AND STORAGE MEDIUM FOR STORING INFORMATION RETRIEVAL PR...