Hand-helds, calibrators

Hand-held digital pressure gauges and pressure calibrators are versatile tools used for field and laboratory calibration of pressure instruments. These devices typically combine a pressure generation system and an accurate digital gauge, making them ideal for portable calibration tasks. Here’s how they work and their advantages:

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Hand-Held Digital Pressure Gauges

These compact devices are primarily used to measure pressure in the field. They are portable, battery-operated, and designed for ease of use.

Features

• Compact Design: Easy to carry for on-site work.
• Accuracy: Typically offers accuracy from ±0.05% to ±0.1% of full-scale reading.
• Pressure Ranges: Available in various ranges, from vacuum to several thousand psi or bar.
• Digital Display: Clear readings with additional features like units selection and backlighting.
• Durability: Often ruggedized for industrial environments.

Calibration Process

1. Setup: Connect the gauge to a pressure source (e.g., hand pump or system under test).
2. Verification: Compare readings with a traceable reference standard.
3. Recording: Document discrepancies or validate performance within specified tolerances.

Applications

• Checking pressure in HVAC systems.
• Monitoring process controls.
• Testing hydraulic or pneumatic systems.

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Hand-Held Pressure Calibrators

These devices go beyond measuring pressure; they can generate and control it, making them ideal for calibrating other pressure instruments, such as transmitters and switches.

Features

• Integrated Pressure Generation: Includes hand pumps for pneumatic or hydraulic pressure generation.
• High Accuracy: Typically better than ±0.025% of full scale.
• Multifunctionality:
  • Simulate process signals (e.g., 4–20 mA for transmitters).
  • Measure electrical parameters (voltage, current, resistance).
• Data Logging: Store calibration data for later transfer to a computer.
• Multiple Units: Support for pressure, temperature, and electrical units.

Calibration Process

1. Setup: Attach the calibrator to the device under test (DUT) and the reference.
2. Pressure Generation: Use the built-in pump to apply a controlled pressure.
3. Comparison: Record readings from the DUT and compare with the calibrator.
4. Adjustments: Fine-tune the DUT as necessary to align with the calibrator's reference.
5. Validation: Verify performance after adjustments.

Applications

• Calibrating pressure sensors, transmitters, and switches.
• Troubleshooting pressure-related issues.
• Conducting periodic maintenance on critical systems.

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Advantages of Hand-Helds and Calibrators

• Portability: Perfect for on-site calibrations.
• Ease of Use: Intuitive operation for technicians.
• Cost-Effective: Saves time and resources by reducing the need for bench equipment.
• Wide Range of Compatibility: Suitable for many pressure instruments and industries.

If you are looking to choose a hand-held pressure gauge or calibrator, consider factors such as the pressure range, accuracy requirements, and compatibility with your application. Let me know if you need recommendations or further details!