# Standards of Measurement

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Slide 1

﻿LESSON 1 Principles of Measurement Let the Games Begin!

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Objectives Measurement of temperature and weight Units of estimation Measurement gadgets

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References Introduction to Naval Engineering Principles of Naval Engineering

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Purpose of Measuring Devices Why vital to legitimate operation of drive plants?

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WHAT IS TEMPERATURE? A sign of the inner vitality contained in a substance Mono-Atomic Gasses: Linearly relative Poly-Atomic Gasses: translational, rotational and vibrational dynamic vitality. Temp is a measure of yet not specifically corresponding to inside active vitality.

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Measurement of Temperature Relative Scales Fahrenheit (°F) Celsius (°C) Absolute Scales Rankine (°R) Kelvin (K)

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Temperature Relationships (°F) = 9/5*(°C) +32 (°C) = 5/9*[(°F) –32] (°F) = (°R) – 459.67 (°C) = (K) – 273.15

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Measurement of Pressure Definition: Force per unit range Units of estimation Pounds compel per square creep (psi) Inches Hg or inches H 2 O ("Hg) Atmospheres (atm)

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Pressure Relationships Gage weight (PSIG) Absolute weight (PSIA) Vacuum weight (PSIV) or (in Hg) Atmospheric weight (14.7 psi)

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Pressure Relationships Absolute Pressure = Atmospheric Press. + Gage Press. Vacuum = Atmospheric Pressure - Absolute Pressure

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Pressure Relationships 30 PSIA 15.3 PSIG GAGE PRESSURE (PSIG) ABSOLUTE PRESSURE (PSIA) Atmospheric Pressure 14.7 PSIA 0 PSIG (Average at Sea Level) 0 In. Hg VACUUM (in. Hg) 0 PSIA 29.92 In. Hg

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Principle of Operation Temperature Devices Expansion Thermometers Liquid in glass Bimetallic Filled framework/removed perusing Pyrometers Thermocouple Resistance Radiation and optical pyrometers

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Expansion Thermometer Liquid in Glass Bimetallic Filled System/Distant Reading

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Expansion Thermometer Liquid in Glass Bimetallic Filled System/Distant Reading

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Expansion Thermometer Liquid in Glass Bimetallic Filled System/Distant Reading

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Expansion Thermometer Liquid in Glass Bimetallic Filled System/Distant Reading

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Pyrometers Thermocouple Resistance Radiation and Optical

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Pyrometers Thermocouple Resistance Radiation and Optical

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Pyrometers Thermocouple Resistance Radiation and Optical

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Pyrometers Thermocouple Resistance Radiation and Optical

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Operation of Pressure Measuring Devices Manometers Bourdon tube Bellows gage

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Operation of Pressure Measuring Devices Manometers Bourdon tube Bellows gage

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Operation of Pressure Measuring Devices Manometers Bourdon tube Bellows gage

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Operation of Pressure Measuring Devices Manometers Bourdon tube Bellows gage

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Questions?