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Verifying process gauges, analog and digital
Verifying process gauges, analog and digital

Verifying analog and digital pressure gauges

Both analog and digital process gauges need to be verified to detect errors related to drift, environment, electrical supply, addition of components to the output loop, and other process changes. Pressure gauges may be verified in the field or at the bench.

Field calibration may save time and allows for troubleshooting in the process environment. Multifunction calibrators make it easier to do this with one tool, and documenting calibrators make it easier to follow procedures, capture data and document results. Bench calibration provides an environment where the gauge can be cleaned, inspected, tested, and recertified under reference conditions for the best possible accuracy.

How to perform the verification test

  1. Isolate the pressure gauge from the process using valves, or by removing the gauge from the process.
  2. Connect the gauge to the calibrator or reference gauge. For hydraulic pressure gauges it’s important to remove any gas that might be trapped in the fluid in the gauge, calibrator, and connections by priming the system. When generating pressure allow a few moments for stability. Compare the reading of the gauge under test with the master gauge or calibrator.
  3. For hydraulic pressure gauges it’s important prime the system. This will remove any gas that might be trapped in the fluid in the gauge, calibrator or connections.
  4. When generating pressure allow a few moments for the measurement to stabilize. When using a hydraulic hand pump as a source it can take several minutes for the pressure to stabilize due to the thermodynamic effect of fluids.
  5. Compare the reading of the gauge under test with the master gauge or calibrator.

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  • Chemical processing pressure calibration resources
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    • Products
      • Accessories
        • See all
      • Building infrastructure
        • HVAC tools
        • Indoor air quality testing
        • Industrial Ethernet tools
        • Laser distance meters
        • Laser levels
        • Network cable testers
      • Calibration tools
        • Fluke Calibration
        • mA loop calibrators
        • Multifunction calibrators
        • Pressure calibrators
        • Temperature calibrators
      • Electrical tools
        • Basic electrical testers
        • Battery analyzers
        • Clamp meters
        • Digital multimeters
        • Earth ground
        • Installation testers
        • Insulation testers
        • Insulated tools
        • Portable appliance testers
        • Portable oscilloscopes
        • Power quality
      • Fluke software
        • Fluke Calibration software
        • Fluke Networks software
        • Fluke SmartView
      • Industrial imaging
        • See all
      • Intrinsically safe
        • See all
      • Mechanical maintenance
        • Laser alignment
        • Vibration analysis
      • Temperature measurement
        • Contact thermometers
        • IR thermometers
      • Thermal imaging
        • IR windows
        • Thermal cameras
        • Visual IR thermometers
      • New Fluke products
      • Test tools catalog
    • Learn
      • Best practices
        • Custody transfer
        • Electrical inspection
        • Energy efficiency
        • Equipment and production line testing
        • Fluid systems
        • Measurement basics
        • Motors and drives
        • Pressure calibration
        • Preventive maintenance
        • Safety
        • Temperature calibration
        • Test tools basics
      • Blog
      • Fluke education partnership program
      • Leak detector
      • Library
      • Online courses
      • Tools and calculators
        • Air leakage calculator
        • FOV calculator
      • Tradeshows and seminars
      • Webinars
    • Support
      • About us
        • Careers
        • Companies
        • Contact us
        • Corporate profile
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      • Calibration Services
      • Manuals
      • Press releases
      • Product registration
      • Repair
      • Return materials authorization
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    • Where to buy
      • Promotions and contests
      • Protect your purchase
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