• Other Fluke companies:
  • Fluke
  • Fluke Biomedical
  • Fluke Networks
  • Fluke Process Instruments
See more Fluke brands
Accelix Amprobe Beha-Amprobe Comark Emaint Landauer Pacific Laser Systems Pomona RaySafe Schad
Home
Precision, Performance, Confidence.
Fluke Calibration: Oceania
  • Register
  • Log in
  • Contact Us

AU - English [Change]

 

Are you using a deadweight tester or piston gauge? Be sure to account for gravity

P5515A deadweight tester

To establish pressures using a deadweight tester (DWT) or piston gauge, you need to account for the acceleration of gravity where the instrument is operated. Gravity varies around the world. With a range of approximately 0.5 %, the local gravity correction is typically the largest environmental influence acting on the deadweight tester.

The most accurate method to determine the acceleration of gravity at the site where the deadweight tester will be used is to perform a site survey. Various companies provide this service. Although this is the most accurate method, it can also be expensive. To determine the acceleration of local gravity value when a survey or site measurement is unavailable (or unaffordable), the resources listed below are available on the Internet.

1. Use one of the following options to determine the latitude, longitude, and elevation at the site the deadweight tester will be used:

Obtain latitude and longitude coordinates using a GPS receiver 
or
Use an Internet-based geo-coding program

  • https://www.google.com/maps. (To learn how to find latitude/longitude, go to Google here.)
  • https://mapper.acme.com/

2. Enter latitude and longitude coordinates into one of the following Internet-based programs:

  • NOAA/NGS website (limited to the contiguous 48 United States) – https://www.ngs.noaa.gov/cgi-bin/grav_pdx.prl
  • PTB (National Metrology Laboratory of Germany) website (global) – https://www.ptb.de/cartoweb3/SISproject.php

For the P3XXX Series Deadweight Testers, you have two choices. We can provide the deadweight tester matched to standard gravity (9.80665 m/s2) and you can use software (such as Fluke Calibration PressCal) to account for the acceleration of local gravity. Or, we can provide the deadweight tester matched to the local gravity value that you supply. Fluke Calibration offers this service at no additional charge. Just provide your local gravity on the purchase order.

For piston gauges, such as the 2400 Series and PG7000 Series, the local gravity must be entered into either the terminal (PG7000 series) or software that will be used for the piston gauge calculation (WinPrompt or COMPASS® for Pressure software).

If you do not have a site survey, the methods available on the Internet provide a possible resource for determining the gravity at your location. The uncertainties estimated using this method range from about 0.0002 % up to 0.002 %. Use these at your discretion to determine if the local gravity provided is suitable for the intended use.

Tim Francis, Business Unit Manager, Pressure & Flow, at Fluke Calibration
Posted by Tim Francis on Oct 22, 2018
Tim Francis is the Business Unit Manager for Pressure and Flow at Fluke Calibration. He began his career in pressure metrology in 2002 at Ruska, where he was an Applications Engineer. He joined Fluke Calibration in 2010 following the  Ruska acquisition. Tim holds a bachelor’s degree in... Full Bio
  • Login or register to post comments
  • Printer-friendly version »

Comments

Submitted by Greg Matheson on Thu, 2018-11-29 07:30.

MSL or Elevation above sea level can be found for your location at: www.whatismyelevation.com/

Just an FYI

GMAT

  • Login or register to post comments
  • Home
  • Products
    • New Products
    • Electrical Calibration
      • Electrical Standards
      • Electrical Calibrators
      • Bench Multimeters
      • Electrical Calibration Software
    • RF Calibration
      • RF Reference Sources
      • RF Calibration Accessories
      • RF Calibration Software
    • Data Acquisition and Test Equipment
      • Bench Multimeters
      • Data Acquisition
      • Data Acquisition Software
    • Temperature Calibration
      • ITS-90 Temperature Standards
        • ITS-90 Fixed-point cells
        • Standard Platinum Resistance Thermometers
        • Maintenance Apparatus
        • Liquid Nitrogen Comparison Calibrator
        • Resistance Bridges
        • Standard Resistors
      • Calibration Baths
        • Compact Calibration Baths
        • Standard Calibration Baths
        • Special Application Baths
        • Bath Accessories
        • Bath Controllers
        • Bath Fluids
      • Industrial Calibrators
        • Field Metrology Wells
        • Metrology Wells
        • Handheld Calibrators
        • Field Dry-Block Calibrators
        • Micro Baths
        • Infrared Calibrators
        • Thermocouple Furnaces
        • Dual Block Dry-Well
        • Zero-point Dry-Well
      • Probes / Sensors
        • Platinum Resistance Thermometers (PRTs)
        • Thermistors
        • Thermocouples
      • Digital Thermometer Readouts
      • Multifunction Calibrators
      • Temperature Calibration Software
    • Humidity Calibration
      • Humidity Generators
      • Humidity Data Loggers and Monitors
    • Pressure Calibration
      • Piston Gauges
        • NMI Piston Gauges
        • Absolute Piston Gauges
        • High Pressure Pneumatic Piston Gauges
        • Hydraulic Piston Gauges
        • Piston Gauge Accessories
      • Automated Pressure Controller / Calibrators
        • Low Pressure Controllers / Calibrators
        • Pneumatic Pressure Controllers / Calibrators
        • High Pressure Pneumatic Controller / Calibrators
        • Hydraulic Controller / Calibrators
      • Pressure Monitors
        • Low Pressure Monitors
        • Digital Pressure Gauges
        • Reference Pressure Monitors
      • Deadweight Testers
        • Pneumatic Deadweight Testers
        • Oil Deadweight Testers
        • Water Deadweight Testers
        • High-Pressure Hydraulic Deadweight Testers
        • Deadweight Tester Accessories
      • Manual Pressure Calibration
        • Pressure Calibrators
        • Pneumatic Pressure Control
        • Hydraulic Pressure Comparators / Pumps
      • Handheld Pressure Calibrators
      • Air Data Calibration
      • Environmental Monitors
      • Pressure Calibration Accessories
      • Pressure Calibration Custom Systems
      • Pressure Calibration Software
    • Flow Calibration
      • Gas Flow Standards
      • Gas Flow Accessories
      • GFS Primary Gravimetric Flow Standard
      • Flow Calibration Software
    • Process Calibration Tools
      • Temperature Calibrators
        • Handheld Temperature Calibrators
        • Dry-Block Calibrators and Micro-Baths
        • Precision Digital Thermometers
        • Temperature Probes
        • Infrared Calibrators
        • Hygro Thermometer with Data Logging
      • Pressure Calibrators
        • Digital Pressure Calibrators
        • Handheld Pressure Calibrators
        • Deadweight Testers
        • Precision Digital Pressure Gauges
        • Calibration Hand Pumps
      • Multifunction Calibrators
      • mA Loop Calibrators
      • Process Calibration Software
    • Calibration Software
      • MET/CAL® Software
      • MET/CAL® Support
      • Asset Management Software
      • Temperature Calibration Software
      • Pressure Calibration Software
      • Flow Calibration Software
      • Mechanical / Dimensional Calibration Software
    • Service and Support
    • All Calibration Instruments
  • Purchase Info
    • Where to Buy
    • Request a Quote
    • Request a Demo
    • Request a Sales Consultation
    • Certified Pre-Owned Equipment
    • General Services Administration (GSA)
    • Financing Program
    • National Stock Numbers (NSNs)
    • Payment Options and Tax Info
  • News
    • Press Releases
    • Promotions
    • Industry Links
    • Metrology Salary Survey
  • Training and Events
    • Conferences and Exhibitions
    • Training Courses
    • User Group Meetings
    • Web Seminars
      • Live Seminars
      • On-Demand Seminars
  • Literature and Education
    • Education Hub
    • About Calibration
    • Articles and Education
    • Product Literature
    • Product Manuals (User Guides)
    • Videos and Virtual Demos
    • Blog
  • Service and Support
    • Service Request (RMA)
    • Service Plans
    • Technical Support
    • Knowledge Base
    • Accreditations
    • Authorized Service Centers
    • Calibration Certificates
    • Community Forum
    • My MET/SUPPORT
      • Activate
      • Procedures
      • Software
      • Technical Bulletins
      • Priority Support
      • Manuals
    • Product Manuals (User Guides)
    • Safety Data Sheets (SDS)
    • Safety, Service, and Product Notices
    • Software Downloads
    • Tools
      • PT100 Calculator
      • ITS-90 Reference Function Calculator
      • Thermocouple Table Voltage Calculator
      • Thermocouple Voltage to Temperature Calculator
  • About Us
    • Contact Us
    • Visit Us
    • Employment
    • Fluke Calibration
      • Hart Scientific Temperature Calibration
      • DH Instruments Pressure and Flow Calibration
      • Pressurements Pressure Calibration
      • Ruska Pressure Calibration
    • Fluke Companies
    • Integrity and Compliance
    • Frequently Asked Questions
Home|Blog|Are you using a deadweight tester or piston gauge? Be sure to account for gravity
©1995-2023 Fluke Corporation
             

Secondary menu

  • Disclaimer
  • Privacy Statement
  • Terms of Use
  • Terms of Sale