Standards of Measurement

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Slide 1

LESSON 1 Principles of Measurement Let the Games Begin!

Slide 2

Objectives Measurement of temperature and weight Units of estimation Measurement gadgets

Slide 3

References Introduction to Naval Engineering Principles of Naval Engineering

Slide 4

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

Slide 5

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.

Slide 6

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

Slide 7

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

Slide 8

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)

Slide 9

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

Slide 10

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

Slide 11

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

Slide 12

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

Slide 15

Expansion Thermometer Liquid in Glass Bimetallic Filled System/Distant Reading

Slide 16

Expansion Thermometer Liquid in Glass Bimetallic Filled System/Distant Reading

Slide 17

Pyrometers Thermocouple Resistance Radiation and Optical

Slide 18

Pyrometers Thermocouple Resistance Radiation and Optical

Slide 19

Pyrometers Thermocouple Resistance Radiation and Optical

Slide 20

Pyrometers Thermocouple Resistance Radiation and Optical

Slide 21

Operation of Pressure Measuring Devices Manometers Bourdon tube Bellows gage

Slide 22

Operation of Pressure Measuring Devices Manometers Bourdon tube Bellows gage

Slide 23

Operation of Pressure Measuring Devices Manometers Bourdon tube Bellows gage

Slide 24

Operation of Pressure Measuring Devices Manometers Bourdon tube Bellows gage

Slide 25

Questions?

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