Additel ADT 273Ex is an intrinsically safe portable multifunction pressure calibrator designed for demanding measurement and calibration tasks. The instrument is particularly suitable for users who need to perform precise pressure and electrical measurements directly in the field while meeting requirements for operation in hazardous areas. With its color touchscreen, intuitive user interface and flexible pressure module technology, the ADT 273Ex combines high metrological performance with convenient operation.

A major advantage of the Additel ADT 273Ex is its modular pressure measurement system. A field-replaceable ADT 158Ex pressure module can be installed on the bottom of the calibrator. Two additional connections are available for external digital pressure modules. Together with the integrated barometric sensor, this enables the ADT 273Ex to be configured for a wide variety of pressure calibration applications.

Depending on the installed pressure module, the Additel ADT 273Ex provides pressure measurement accuracy down to 0.02 % FS. Compatible ADT 158Ex pressure modules are available for pressure ranges up to 60,000 psi / 4,200 bar. This allows a single ADT 273Ex base unit to be combined with different pressure modules instead of requiring a separate handheld instrument for every pressure range.

At europascal, you receive professional solutions for pressure measurement and pressure calibration. We can assist you in selecting the appropriate ADT 273Ex, suitable pressure modules and accessories for your individual calibration application.

For regular calibration and metrological traceability of your pressure measuring equipment, europascal also provides a professional Calibration Service.

Your Benefits at a Glance

• Intrinsically safe multifunction pressure calibrator
• Pressure measurement accuracy down to 0.02 % FS
• Replaceable internal ADT 158Ex pressure module
• Two connections for external digital pressure modules
• Pressure ranges with ADT 158Ex modules up to 4,200 bar
• Integrated barometric sensor
• Electrical signal measurement
• Current, voltage and frequency measurement
• Loop power for transmitters
• Optional HART communication
• Integrated Quick Test tasks
• Color touchscreen
• Intuitive user interface
• Bluetooth communication
• USB communication
• Communication with Additel Link Mobile App
• Suitable for hazardous areas
• ATEX and IECEx certified
• Ex ia IIC T4 Ga classification
• Long battery life
• ISO/IEC 17025 accredited calibration with calibration data included according to the manufacturer

The combination of pressure measurement, electrical measurement functions and optional HART communication makes the Additel ADT 273Ex a versatile solution for professional calibration, maintenance and service applications.

Designed for Demanding Calibration Applications

The Additel ADT 273Ex was specifically developed for professional pressure calibration under demanding environmental conditions.

The instrument has an explosion protection classification of Ex ia IIC T4 Ga and corresponding ATEX and IECEx certifications. Additel particularly identifies hazardous gas environments as an intended application area.

Typical applications include:

• Calibration laboratories
• In-house calibration laboratories
• Oil and gas industry
• Refineries
• Chemical industry
• Petrochemical industry
• Pharmaceutical industry
• Energy supply
• Gas processing
• Process industries
• Plant engineering
• Maintenance
• Mobile calibration service

For service technicians in particular, combining several measurement functions in a single instrument provides significant practical benefits.

Pressure and the electrical output signal of a transmitter can be measured using one calibrator, reducing the amount of separate test equipment required in the field.

Flexible Pressure Measurement with the ADT 273Ex

The modular pressure measurement concept is one of the most important features of the Additel ADT 273Ex.

The instrument provides three options for connecting pressure modules.

A field-replaceable ADT 158Ex can be installed as the internal module on the bottom of the instrument.

Two additional connections on the side are available for external digital pressure modules.

This allows users to configure the instrument specifically for the calibration task at hand.

If different pressure ranges are required, suitable modules can be installed or connected without replacing the entire handheld calibrator.

The Additel ADT 158Ex pressure modules provide measurement ranges up to 60,000 psi / 4,200 bar and accuracy down to 0.02 % FS.

The modules are fully temperature compensated and specifically designed for use with intrinsically safe Additel handheld instruments such as the ADT 273Ex and ADT 260Ex.

According to the supplied product information, the ADT 273Ex can also be ordered without an ADT 158Ex module and configured later for the required application.

Integrated Barometric Sensor

Another advantage of the Additel ADT 273Ex is its integrated barometric sensor.

According to the manufacturer information provided, the barometric sensor has an accuracy of ±55 Pa.

The integrated barometer extends the pressure measurement capabilities of the calibrator and supports applications involving both absolute and gauge pressure.

This provides additional flexibility without necessarily requiring a separate external barometric reference instrument for every application.

Electrical Measurement Functions

In addition to pressure measurement, the Additel ADT 273Ex provides an electrical measurement channel.

The electrical connections are located at the top of the instrument and use 4 mm safety sockets.

Electrical output signals from pressure transmitters and other process instruments can therefore be measured directly during calibration.

Supported electrical functions include:

• DC current measurement
• DC voltage measurement
• Millivolt measurement
• Frequency measurement
• Switch testing
• Loop power

This combination is particularly useful for pressure transmitter calibration.

While a suitable pressure module measures the applied reference pressure, the electrical channel can simultaneously measure the output signal of the device under test.

Pressure Transmitter Calibration

A typical application for the Additel ADT 273Ex is calibration of a 4 to 20 mA pressure transmitter.

A suitable ADT 158Ex module measures the reference pressure while the electrical measurement channel monitors the transmitter output.

Loop power can be used to supply compatible transmitters during calibration.

This combination enables the pressure input and corresponding electrical output signal to be evaluated using a single handheld calibration platform.

For service technicians working in process plants, this can significantly simplify the calibration setup.

Optional HART Communication

For applications involving intelligent process instrumentation, the Additel ADT 273Ex is optionally available with HART communication.

This allows compatible HART transmitters to be integrated into the calibration procedure.

The calibrator can measure pressure while simultaneously measuring current or millivolt signals from a transmitter.

An excitation or loop voltage can also be provided to power a compatible sensor or transmitter.

The optional HART capability makes the ADT 273Ex particularly interesting for maintenance and service technicians working with modern process instrumentation.

Modern Touchscreen Operation

The Additel ADT 273Ex features a modern color touchscreen and an intuitive graphical user interface.

The operating concept is designed to provide fast access to measurement and calibration functions.

Its transflective color display is also designed for good readability in direct sunlight.

This is particularly beneficial for mobile calibration work outdoors or in industrial facilities with challenging lighting conditions.

Integrated Quick Test tasks support recurring test procedures and enable standardized measurement tasks to be performed directly from the handheld instrument.

Technical Highlights

• Intrinsically safe pressure calibrator
• Ex ia IIC T4 Ga
• ATEX and IECEx certification
• Pressure accuracy down to 0.02 % FS
• Pressure ranges up to 60,000 psi / 4,200 bar with compatible ADT 158Ex modules
• One field-replaceable internal ADT 158Ex pressure module
• Two external digital pressure module connections
• Integrated barometric sensor
• Barometric accuracy ±55 Pa
• DC current measurement
• DC voltage measurement
• Millivolt measurement
• Frequency measurement
• Pressure switch testing
• Loop power
• Optional HART communication
• Color touchscreen
• Quick Test tasks
• Bluetooth
• USB
• Additel Link Mobile App support
• Typical battery life up to 100 hours in measurement mode

Technical Specifications

The actual pressure accuracy and available pressure range depend on the pressure module installed or connected to the ADT 273Ex.

Designed for Mobile Field Calibration

The Additel ADT 273Ex is not limited to calibration laboratory applications.

A major focus of its design is mobile calibration and service work.

The intrinsically safe lithium battery has a capacity of 4,000 mAh / 14.4 Wh.

According to the supplied manufacturer information, typical operating time is approximately 100 hours in measurement mode.

The specified operating temperature extends from −20 °C to 50 °C, supporting field operation under a wide range of environmental conditions.

Long battery life is particularly beneficial for service assignments where permanent external power is not available.

Bluetooth and USB provide communication and data transfer capabilities.

The instrument also supports the Additel Link Mobile App.

Intrinsically Safe Calibration in Hazardous Areas

The key distinction of the Additel ADT 273Ex is its suitability for hazardous environments.

Its Ex ia IIC T4 Ga classification, together with ATEX and IECEx certification, makes it suitable for corresponding applications where explosion protection is required.

This is particularly relevant in industries such as:

• Oil and gas
• Chemical processing
• Petrochemical plants
• Refineries
• Gas processing
• Energy production
• Process industries

Users should always ensure that the complete calibration setup, accessories and operating conditions comply with the applicable hazardous-area requirements.

One Calibrator for Multiple Pressure Ranges

The modular pressure concept provides an important economic and practical advantage.

Instead of purchasing a separate pressure calibrator for every required pressure range, the Additel ADT 273Ex can be combined with different compatible pressure modules.

This is particularly useful for service departments and calibration laboratories that work with pressure instruments covering widely different measurement ranges.

Pressure modules can be selected according to the current application, while the same ADT 273Ex base unit continues to provide the electrical measurement functions, user interface, barometric sensor and communication capabilities.

Why Choose the Additel ADT 273Ex?

The Additel ADT 273Ex combines several functions that often require multiple instruments in conventional calibration setups.

Pressure measurement, electrical signal measurement, barometric measurement and optional HART communication are available within one compact system.

The modular pressure concept additionally allows users to select the required pressure range according to the specific measurement task.

This combination is particularly valuable for companies operating in hazardous areas.

The Ex ia IIC T4 Ga classification and ATEX and IECEx certifications enable corresponding applications in industries such as oil and gas, chemical processing, petrochemicals and energy supply.

According to the supplied manufacturer information, Additel provides the ADT 273Ex with an ISO/IEC 17025 accredited calibration certificate.

Standard accessories also include components such as a power supply, rechargeable lithium battery, test leads, magnetic carrying strap and Ex USB cable according to the supplied product information.

Typical Applications of the Additel ADT 273Ex

The Additel ADT 273Ex is suitable for numerous calibration, testing and maintenance applications.

Typical devices under test include:

• Pressure transmitters
• Pressure transducers
• Pressure gauges
• Digital pressure gauges
• Pressure sensors
• Pressure switches
• Process instruments
• HART transmitters

A typical example is calibration of a 4 to 20 mA pressure transmitter.

A suitable ADT 158Ex module measures the reference pressure while the electrical channel measures the transmitter output.

With the HART version, compatible digital communication functions can additionally be used.

The ability to connect multiple pressure modules also makes the instrument suitable for more complex comparison measurements and differential-pressure applications.

At europascal, we can assist you in selecting the appropriate Additel ADT 273Ex, suitable ADT 158Ex pressure modules and additional components for your calibration setup.

For regular calibration and metrological traceability of pressure calibrators, pressure modules, pressure transmitters and other pressure measuring equipment, use the europascal Calibration Service.

Additional measurement and calibration solutions are available through the europascal English homepage.

Discover more products and calibration solutions from europascal.

Manufacturer information about the Additel ADT 273Ex is available on the official Additel ADT 273Ex product page.

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