CALIBRATION OF NOBLE METAL THERMO-COUPLES AT THE MELTING POINT OF PALLADIUM (in Russian)
Journal Article
·
· Izmeritel'naya Tekh.
OSTI ID:4087639
The calibration error of platinum-rhodium thermocouples above 1200 deg C can be decreased by an additional determination of the thermal emf of the working junction at the melting point of palladium (1552 deg C plus or minus 2 deg C). A piece of pure palladium wire (99.95% Pd) with a diameter of 0.4 mm and a length of 15 to 20 mm was wrapped around the junction to be calibrated and immersed in a furnace held at a temperature of 10 to l5 deg C above the melting point of palladium by means of a control thermocouple. Constant readings of the thermnal emf were observed on a compensated, low-resistance potentiometer with a subsequent sharp increase in temperature after the fusion of palladium was complete. The agreement with the results obtained with a standard optical pyrometer is good. (TTT)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-15-011226
- OSTI ID:
- 4087639
- Journal Information:
- Izmeritel'naya Tekh., Journal Name: Izmeritel'naya Tekh. Vol. Vol: No. 12
- Country of Publication:
- Country unknown/Code not available
- Language:
- Russian
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