Petroleum Instrumentation NGT 160 Basics Instrumentation Chapter 7
Petroleum Instrumentation NGT 160 Basics Instrumentation Chapter 7 Temperature Measurement and Control “This product was funded by a grant awarded by the U. S. Department of Labor’s Employment and Training Administration. The product was created by the grantee and does not necessarily reflect the official position of the U. S. Department of Labor. The Department of Labor makes no guarantees, warranties, or assurances of any kind, express or implied, with respect to such information, including any information on linked sites and including, but not limited to, accuracy of the information or its completeness, timeliness, usefulness, adequacy, continued availability, or ownership. ” Unless otherwise specified, this work by Shale. NET U. S. is licensed under a Creative Commons Attribution 4. 0 International License.
Temperature (107) Temperature is the most important variable in automatic control • Can only measured indirectly (inferred) • Temperature and pressure • Temperature and volume • Temperature and humidity Measured • Bimetallic thermometers • Filled system thermometers (mercury) • Electrical property thermometers (RTD & TC) • Radiation energy thermometers (pyrometers) (infrared) (color and brightness) •
(page 107)
Temperature Scales (108)
Temperature • Filled Temperatures Systems (109 -110)
Temperature • Bimetallic Thermometers (112)
Temperature • Electronic Temperature Sensors 1. Thermoresistive elements (113) or RTD – resistive temperature detector (or device) • Resistance measurement and calibrated to temperature 2. Thermistors (114)
Temperature • Thermocouples (114)
Temperature • Two wire current transmitters (118)
Temperature • Smart Temperature Transmitters (118)
Temperature • Summary (124) • Review Exercise (125)
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