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28 Cards in this Set
- Front
- Back
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What is slope? |
An adjustment to the relationship between the two IR detectors to compensate for a difference in infrared radiation detected |
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The degree or intensity of heat measured on a definite scale |
Temperature |
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The most important elements of temperature, heat, and energy are? |
Temperature scales, reference temperature, heat transfer, heat capacity, response time, and thermal expansion |
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________ is the lowest temperature possible where there is no molecular movement and the energy is at a minimum |
Absolute zero |
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________ the movement of thermal energy from one place to another |
Heat transfer |
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_______ is the state where objects are at the same temperature in there is no heat transfer between them |
Thermal equilibrium |
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________ is heat transfer that occurs when molecules in a material are heated and the heat is passed from molecule to molecule through the material |
Conduction |
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________ is heat transfer by the movement of a gas or liquid from one place to another caused by a pressure difference |
Convection |
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________ is the unaided movement of a gas or liquid caused by a pressure difference due to a difference in density with the gas or liquid |
Natural convection |
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_______ is the movement of a gas or liquid due to a pressure difference cause by the mechanical action of a fan or pump |
Forced convection |
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________ is heat transfer by electromagnetic waves emitted by higher temperature object and absorbed by a lower temperature object |
Radiation |
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________ is a heat conductor used to remove heat from sensitive electronic parts |
Heat sink |
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________ is the amount of energy needed to change the temperature of a material by certain amount |
Heat capacity |
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A ________ is the amount of energy necessary to change the temperature of a 1lb of water by 1 F from 59 F to 60 F |
BTU |
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________ the ratio of the heat capacity of that liquid to the heat capacity of water at the same temperature |
Specific heat |
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A ________ is the time required for a thermometer to reach 63.2% of its final value |
Response time constant |
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The __________ is the amount a unit length of material lengthens or contract with temperature changes |
Coefficient of linear expansion |
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The __________ is the amount of unit volume of material expands or contracts with temperature changes |
Coefficient of volumetric expansion |
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The __________ determines how much the size of an object changes when heated or cooled |
Coefficient of thermal expansion |
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What are some thermal expansion thermometers? |
Liquid in glass, bimetallic, and pressure spring |
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Name three types of pressure Springs thermometers? |
Liquid-filled, gas-filled, vapor pressure pressure spring thermometer, helix |
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Of the various types of pressure spring thermometers the ________ have the ________ followed by the vapor pressure systems and then the ________ |
Gas filled systems / fastest response type / liquid filled system |
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Common electrical thermometers are? |
Thermocouples, RTDs, thermistors, and semiconductor thermometers |
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A __________ is an electrical thermometer consisting of two dissimilar metal wires join at one end and a volt meter to measure the voltage at the other end of the two wires |
Thermocouple |
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A ________ is the point where the two dissimilar wires are joined |
Thermocouple Junction |
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The ________ is the joined end of a thermocouple that is exposed to the process where the temperature measurement is desired |
Hot junction (measured junction) |
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The ________ is the end of a thermocouple that is kept at a constant temperature in order to provide a reference point |
Cold junction (reference junction) |
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A ________ create an electrical potential in the junction is it an elevated temperature |
Thermocouple |
