Techniques in high-temperature resistance thermometry. 1: Construction of the NBS-design high temperature platinum resistance thermometer. 2: Toroidal resistor for high-temperature platinum resistance thermometers
Abstract
High temperature platinum resistance thermometers intended for use as standard interpolating instruments up to the gold point (1064 C) are described which utilize a resistor of reference grade platinum wire wound in a single layer, bifilar helix. The supports and insulators are made of high purity fused silica, and the thermometer incorporates an electrical guard system to minimize the effects of electrical leakage. A toroidal resistor model, also considered, is designed to be easy to make from readily available materials, and it features robustness, small size, and freedom from strain.
- Publication:
-
Final Report National Bureau of Standards
- Pub Date:
- January 1984
- Bibcode:
- 1984nbs..reptR....B
- Keywords:
-
- Electrical Engineering;
- Platinum;
- Resistance Thermometers;
- Resistors;
- Helical Windings;
- Insulators;
- Silicon Dioxide;
- Size (Dimensions);
- Instrumentation and Photography