Pressure Calibrators

A pressure calibrator is a pressure measuring device used to verify or calibrate the readings of other pressure measuring instruments such as gauges, transmitters, and switches. To ensure reliable calibration, a pressure calibrator must typically be at least four times more accurate than the tested device. These essential tools for process professionals are available as portable handheld units and workshop models.

Pressure calibrators offer a broad range of features, pressure ranges, and accuracy levels. They include intrinsically safe models for hazardous environments, dual sensor calibrators, units with built-in pressure pumps, and advanced digital calibrators capable of current and voltage measurement, loop powering, and data logging. Some pressure calibration instruments also integrate calibration software for streamlined workflows.

Features of Pressure Calibration Equipment and Deadweight Gauges

Pressure calibration instruments are designed for durability and reliability in demanding environments. Typical features include:

• Portability and Ergonomics: Compact, lightweight designs allow for one-handed operation and easy transport.
• Built-in Pressure Generation: Integrated pumps or regulators enable precise pressure generation and control without external sources.
• Electrical Measurements: Many calibrators measure mA current loops, voltage, and provide loop power supplies to test transmitters and switches.
• Advanced Functions: Features such as switch testing, transmitter error calculation, and leak testing enhance diagnostic capabilities.
• Data Logging: Some digital models record measurement data over time for trend analysis and quality assurance.
• Intrinsic Safety: Models certified for use in explosive atmospheres limit electrical and thermal energy to prevent ignition risks.

Here are more detailed insights into some of the specialised features available.

Current Loop Measurement

Current loop measurement is a function in many pressure calibration instruments that allows technicians to measure the current signal used by pressure transmitters. This feature helps in diagnosing signal integrity and ensuring accurate communication between the sensor and control systems.

Data Logging and Software Integration

Data logging is a valuable feature in some digital pressure calibrator models, enabling the recording of pressure measurements over time. This functionality allows for trend analysis, performance monitoring of pressure systems, and documentation of calibration results for quality assurance purposes. Some calibrators connect to software platforms for automated calibration routines and report generation.

Intrinsically Safe Calibrators

Intrinsically safe pressure calibrators are designed for use in hazardous environments where flammable gases or vapours may be present. These instruments limit electrical and thermal energy to levels that cannot cause ignition, ensuring safe operation in potentially explosive atmospheres.

Leak Testing

Leak testing is a function available on some pressure calibrator models, allowing users to monitor pressure stability over time. This feature helps identify leaks in pressure systems by observing any pressure drop, ensuring the integrity and efficiency of the tested equipment.

Types of Pressure Calibrators and Deadweight Testers

These essential tools come in various forms, offering a comprehensive pressure calibration solution for transmitters, gauges, and switches. With different levels of portability and measuring capabilities, users can find the ideal pressure calibrator for a wide range of applications.

Handheld Calibrators for Field Use

Field applications necessitate portable pressure calibration instruments equipped with functions for monitoring voltage, amperage, or digital signals from the device being calibrated.

Handheld multi-function digital pressure calibrator units are ideal for this purpose. They are rugged, easy to use, and often replace multiple instruments, reducing maintenance and recalibration costs. Ideal for onsite calibration of transmitters, gauges, and switches.

Laboratory Calibrators and Controllers

In laboratory or workshop environments, higher accuracy and precise pressure control are required. Pressure calibrators with integrated controllers or electric pumps provide stable pressure generation and fine adjustment. These are suitable for calibrating high-precision instruments.

Deadweight Testers

Deadweight testers or deadweight pressure gauges are considered the gold standard for pressure calibration, especially in laboratory settings. They provide higher accuracy and precise control of pressure. For such environments, a high-end deadweight pressure gauge would be more suitable, providing the necessary precision for critical calibration tasks. While highly reliable, they are bulky, require skilled operation, and are being gradually supplemented by advanced handheld and controller calibrators in field applications.

How Are Pressure Calibrators and Deadweight Testers Used in Industrial Settings?

Calibration Laboratories

In calibration laboratories, high-accuracy pressure calibration instruments, including deadweight pressure gauge models, serve as reference standards to calibrate a wide range of pressure measuring devices.

These instruments ensure the traceability and accuracy of pressure measurements, maintaining quality control and regulatory compliance across various industries.

Oil and Gas Industry

The oil and gas industry relies heavily on pressure calibration equipment to ensure the accuracy and safety of pressure-critical operations.

High pressure calibrator units and intrinsically safe options are used to calibrate pressure transmitters, gauges, and switches on offshore platforms and in refineries, preventing potential hazards and ensuring efficient processes.

Petrochemical and Chemical Processing Plants

Petrochemical and chemical processing plants utilise pressure calibrators to maintain the integrity of their complex systems.

Regular calibration of pressure sensors and transmitters using appropriate pressure calibration instruments is crucial for accurate process control, preventing leaks, and ensuring the safe handling of hazardous materials.

Power Generation Plants

In power generation plants, pressure calibration instruments are essential for ensuring the efficient and safe operation of turbines, boilers, and other pressure-dependent equipment.

Accurate calibration of pressure sensors and gauges helps prevent failures, optimise performance, and comply with stringent safety regulations.

How to Choose the Right Pressure Calibrator

Here are the factors to consider when choosing pressure calibration instruments:

• Accuracy: Ensure the pressure calibration equipment is at least four times more accurate than the device under test (Test Accuracy Ratio of 4:1) to avoid false acceptance or rejection.
• Pressure Range and Rangeability: Choose a pressure calibrator with a range that covers your devices’ full scale and offers good rangeability (ratio of max to min measurable pressure) for versatility.
• Functionality: Consider specific pressure calibrator features you might want, such as a digital display, electrical measurements, data logging or leak testing.
• Portability: For fieldwork, lightweight and compact handheld units are preferable.
• Calibration Standards Compliance: Verify that the pressure calibrator meets relevant international standards and calibration traceability.
• Ease of Use: Intuitive interfaces and clear displays improve efficiency and reduce operator error.
• Budget: Balance cost with required features and accuracy to find the best value.

Shop Pressure Calibration Instruments and Deadweight Gauges at RS Singapore

As a trusted supplier and distributor of test and measurement equipment in Singapore, RS Singapore offers a comprehensive range of high-quality pressure calibration instruments, including digital and differential options. Sourced from reputable brands such as Fluke, Druck, and Jumo, our selection ensures reliable and accurate performance for all your pressure measurement needs.

Beyond our selection of pressure calibrators, we offer a wide array of other test and measurement products, such as thermal imaging devices and analogue multimeters, making us your convenient one-stop shop for your project needs.

Explore our user-friendly online platform today to find the instruments you require at competitive prices and have your items swiftly delivered. Check out our delivery information page for more details on how our flexible options can suit your needs.