Pressure Measurement - CANDU Owners Group Library/20030402.pdf · Typical Pressure Transmitter....
22
Pressure Measurement
Transcript of Pressure Measurement - CANDU Owners Group Library/20030402.pdf · Typical Pressure Transmitter....
Pressure Measurement
Pressure Measurement Devices
Pressure Scales
Bourdon Tube
Pressure
Motion
CrossSection
Bourdon Tube Gauge
Bourdon Tubes
Bellows
Pressure
Motion
FlexibleBellows
Bellows Gauges
Diaphragm
Pressure
Motion
FlexibleMembrane
Diaphragm Differential Gauge
Switch
Capsule 1
Pressure
Motion
FlexibleMembranes
continuousseam
seam
Capsule 2
Differential Pressure Cell
Typical Pressure Transmitter
Pressure Transmitter Installation
Strain Gauge
ForceForceAREA AREA AREA
Resistance Ω Increases
Cross Sectional Area Decreases
Length Increases
Strain Gauge DP Cell
Capacitance Cells
Operating Environment
! Vibration! Temperature! Vapour Content
Failures and Abnormalities
! Over-pressure! Blocked sensing lines! Leaking sensing lines! Loss of electrical power
For you to do
! Read pp 8-17! Answer questions pp. 81-82, #1-5
