Inst ToolsInst ToolsInst Tools
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Search
  • Books
  • Software
  • Projects
  • Process
  • Tools
  • Basics
  • Formula
  • Power Plant
  • Root Cause Analysis
  • Electrical Basics
  • Animation
  • Standards
  • 4-20 mA Course
  • Siemens PLC Course
Reading: How Measurement Span of Pressure Gauge Could be Changed?
Share
Notification Show More
Font ResizerAa
Inst ToolsInst Tools
Font ResizerAa
  • Courses
  • Design
  • PLC
  • Interview
  • Control System
Search
  • Courses
  • Automation
    • PLC
    • Control System
    • Safety System
    • Communication
    • Fire & Gas System
  • Instrumentation
    • Design
    • Pressure
    • Temperature
    • Flow
    • Level
    • Vibration
    • Analyzer
    • Control Valve
    • Switch
    • Calibration
    • Erection & Commissioning
  • Interview
    • Instrumentation
    • Electrical
    • Electronics
    • Practical
  • Q&A
    • Instrumentation
    • Control System
    • Electrical
    • Electronics
    • Analog Electronics
    • Digital Electronics
    • Power Electronics
    • Microprocessor
  • Request
Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Inst Tools > Blog > Pressure Measurement > How Measurement Span of Pressure Gauge Could be Changed?

How Measurement Span of Pressure Gauge Could be Changed?

Last updated: June 3, 2020 12:24 pm
Editorial Staff
Pressure Measurement Practical Questions
1 Comment
Share
2 Min Read
SHARE

Shown here is a diagram of a standard pressure gauge, based on the pressure-sensing action of a hollow, C-shaped metal tube called a bourdon tube:

Pressure gauge mechanism

Using arrows, trace the motions of all moving components in this mechanism as an increasing pressure is applied to the fitting at the bottom of the bourdon tube.

Also, describe how the measurement span of this pressure gauge could be changed. In other words, what would have to be moved, adjusted, or altered in this mechanism in order to change the proportionality of applied pressure to pointer movement?

Answer:

The parts in this gauge mechanism would move as such:

motions of all moving components in pressure gauge

Possible things to change to make this pressure-measuring mechanism more sensitive:

  • Decrease the spring rate (“stiffness”) of the bourdon tube
  • Shorted the arm of the sector gear (the portion to the right of the pivot, joining with the link)
  • Increase the sector gear radius
  • Decrease the pinion gear radius

More Questions for you:

1. What sort of device(s) would you suggest using to apply a precisely known pressure to a gauge for calibration purposes?

2. Suppose a pressure gauge is intended for service in a process measuring liquid pressure. Is it okay to calibrate this gauge on a test bench using compressed air instead of the liquid it will be exposed to in the field? Why or why not?

Share your answers with us through below comments section.

Read Next:

  • DeadWeight Tester Questions
  • DP Level Measurement Problem
  • Valve Questions and Answers
  • Pneumatic Load Cell Principle
  • What is a Four-wire RTD?

Credits: Tony R. Kuphaldt

Don't Miss Our Updates
Be the first to get exclusive content straight to your email.
We promise not to spam you. You can unsubscribe at any time.
Invalid email address
You've successfully subscribed !

Continue Reading

As per Process Conditions, Find out the Circuit Components Status ?
Transmitter Calibration Range of a Vessel Level
Simple Pressure Repeater
Practical Process Control System Questions & Answers – 6
Pressure Gauge Selection
Diaphragm Seal Transmitters Errors
Share This Article
Facebook Whatsapp Whatsapp LinkedIn Copy Link
Share
1 Comment
  • b demudu says:
    June 29, 2020 at 6:45 pm

    pressure gauge calibrated with air and oil(dead weight tester) with air

    instrumentation air to connect through the air regulator to insincere the pressure then same pressure to indicate the test (calibrated) gauge this type of test method is good and no deviation maximum

    the bourdon tube mainly affected by temperature and also a constant pressure is maintained line for a long time this case also gauges are not responding correctly

    Reply

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Stay Connected

128.3kFollowersLike
69.1kFollowersFollow
210kSubscribersSubscribe
38kFollowersFollow

Categories

Explore More

How much Pressure applied to U-tube Water Manometer?
Pressure Switch Questions
Pressure Gauge Water Traps and Pigtail Siphons
Identify High and Low Ports on Pneumatic DP Transmitter
DeadWeight Tester Questions
How to Decrease Span of Pressure Gauge?
Differential Pressure Measurement across Baghouse
pH Transmitter Problem

Keep Learning

Drum Level differential pressure transmitter

Calculate Differential Pressure Sensed by Level Transmitter

Asymmetric capillary for Level Measurement

Effects of Symmetric and Asymmetric Capillary Tube Pressure Measurement

DP transmitter Errors

DP Transmitter Calibration Errors

Pressure Transmitters Purged impulse lines - 2

Pressure Transmitters Purged impulse lines

How Nuclear Radiation is used to Measure Coke Dust Level?

How Nuclear Radiation is used to Measure Coke Dust Level?

Vehicle Electrical Batteries upgrade

Upgrading the Electrical System in an Automobile

Determine the Problems with the Level Transmitter and Gauge

Determine the Problems with Level Transmitter and Gauge

Thermocouple Questions

Thermocouple Terminal block Questions

Learn More

Electrical Engineering Materials Objective Questions

200 Electrical Engineering Materials Objective Questions & Answers

Full Bore or Reduced Bore Valves

When to choose Full Bore Valve or Reduced Bore Valve ?

Resistance Temperature Detector (RTD) Questions

Resistance Temperature Detector (RTD) Questions – 1

Top 80+ Valve Questions and Answers

Top 80+ Valve Questions and Answers

Four Wire Current Loop

4-wire Transmitters Current Loops

quantum computer

Vacuum Technology is Enabling New Era of Ultra-Powerful Computers: Quantum Computing

Industrial Automation Components

Industrial Automation Components Questions and Answers

thermocouple voltages

Manually Interpreting Thermocouple Voltages

Menu

  • About
  • Privacy Policy
  • Copyright

Quick Links

  • Learn PLC
  • Helping Hand
  • Part Time Job

YouTube Subscribe

Follow US
All rights reserved. Reproduction in whole or in part without written permission is prohibited.
Welcome Back!

Sign in to your account

Username or Email Address
Password

Lost your password?