Additel ADT 761A is a portable automatic pressure calibrator designed for demanding calibration tasks in the laboratory and directly in the field. The series combines automatic pressure generation, precise pressure control, interchangeable internal pressure modules, external pressure measurement capabilities and electrical process functions in one compact system. Depending on the configuration, the Additel ADT 761A series covers pressures ranging from very low differential pressure up to 100 bar or 1,500 psi. In addition, the ADT 761A BP provides a dedicated solution for calibrating barometric pressure sensors from 100 to 1,200 hPa.

A major advantage of the Additel ADT 761A is its automatic and independent pressure generation. The operator enters the required setpoint and the instrument automatically generates and controls the pressure. For many applications, this eliminates manual pressure generation using hand pumps and fine adjustment valves.

Additel combines this functionality with up to two internal pressure modules, which can be selected according to the model and required calibration range. This enables the system to cover different pressure ranges while maintaining high measurement performance.

The Additel ADT 761A series includes six basic configurations:

• ADT 761A LLP
• ADT 761A D
• ADT 761A 500
• ADT 761A 1K
• ADT 761A 1.5K
• ADT 761A BP

The product family therefore covers low pressure and differential pressure applications, conventional pneumatic gauge and absolute pressure calibration, high pressure calibration and barometric pressure calibration.

The ADT 761A LLP is specifically designed for very low pressures. Its operating range extends from −75 to +75 mbar or −30 to +30 inH₂O. Accuracy is specified at 0.05 % FS. The LLP supports differential and gauge pressure. A second internal module with a smaller measurement range can also be selected to optimize measurement capability for particularly low pressures.

The ADT 761A D covers pressures from −0.95 to 2.5 bar or −13.5 to 35 psi. This model also supports differential and gauge pressure. Standard accuracy is 0.02 % FS, and a second internal measurement range can be configured for different applications.

The ADT 761A 500 extends automatic pressure generation up to −0.9 to 35 bar or −13 to 500 psig. An integrated barometric reference enables both gauge and absolute pressure measurement. The instrument is equipped with a high range module up to 500 psi, while additional lower range modules can be selected. Depending on the module, accuracy can reach 0.01 % FS or 0.02 % FS.

The ADT 761A 1K automatically generates and controls pressures from −0.9 to 70 bar or −13 to 1,000 psig. Gauge and absolute pressure capabilities are available. The upper range is covered by the CP1K module, while a second internal module can be selected for lower pressure ranges.

The ADT 761A 1.5K is the high pressure version of the series. It reaches −0.9 to 100 bar or −13 to 1,500 psig. An integrated barometric sensor enables gauge and absolute pressure operation. The high pressure range is covered by the CP1.5K module, while a second internal module can be configured for lower ranges.

The ADT 761A BP was specifically developed for calibration of barometric pressure sensors. Its range extends from 100 to 1,200 hPa, with an accuracy of 0.01 % FS. This makes it particularly suitable for barometric pressure sensors, meteorological instrumentation and other applications requiring precise generation and measurement of absolute atmospheric pressure.

In addition to its pressure functions, the series provides extensive electrical measurement and source capabilities. These include current measurement, voltage measurement, mA sourcing, loop power and pressure switch testing. The ADT 761A series also supports HART and PROFIBUS PA communication, task management and data logging.

Modern communication interfaces including WiFi, Bluetooth, USB and Ethernet enable integration into digital calibration workflows and documentation systems.

europascal can assist you in selecting the appropriate ADT 761A configuration and suitable pressure modules. For regular metrological traceability of your pressure calibrators and measuring equipment, europascal also provides a professional Calibration Service.

Your Benefits at a Glance

• Automatic pressure generation and pressure control
• Pressure ranges from ±75 mbar to 100 bar
• Dedicated version for 100 to 1,200 hPa
• Six different model configurations
• Two internal pressure modules with most versions
• Interchangeable internal pressure modules
• Accuracy down to 0.01 % FS
• Control stability down to 0.003 % FS
• Differential pressure measurement
• Gauge pressure measurement
• Absolute pressure measurement
• Barometric pressure measurement
• Connection for two external pressure modules
• mA and voltage measurement
• mA source and loop power
• Pressure switch testing
• HART communication
• PROFIBUS PA communication
• Task management
• Data logging
• WiFi
• Bluetooth
• USB
• Ethernet
• Suitable for laboratory and mobile field applications

Ideal for Demanding Calibration Applications

The Additel ADT 761A is particularly suitable for calibration applications where multiple pressure points need to be generated automatically and reproducibly.

Typical devices under test include:

• Pressure transmitters
• Pressure sensors
• Differential pressure transmitters
• Pressure gauges
• Pressure switches
• Barometric sensors
• Process pressure instruments

The operator enters the required pressure value and the instrument automatically generates and controls the pressure.

This makes measurement sequences with increasing and decreasing calibration points considerably more convenient than conventional calibration using a manual hand pump.

The integrated electrical measurement functions also allow electrical output signals from pressure transmitters to be measured during calibration.

Flexible Modular Design

The Additel ADT 761A series provides excellent flexibility through its internal pressure module concept and the ability to connect two external pressure modules.

For the LLP, D, 500, 1K and 1.5K versions, two internal pressure modules can be used. This allows a high pressure range to be combined with a smaller measurement range that more closely matches lower range devices under test.

A single instrument can therefore cover multiple pressure ranges.

For the 500, 1K and 1.5K versions, the integrated barometric reference also enables operation with both gauge and absolute pressure without requiring a separate external barometric reference.

Additel ADT 761A LLP

The Additel ADT 761A LLP is designed for low differential and gauge pressures from −75 to +75 mbar.

Its specified accuracy is 0.05 % FS.

The LLP configuration is particularly suitable for low pressure transmitters, differential pressure sensors, filter monitoring, HVAC applications and other low pressure measurement tasks.

Additel ADT 761A D

The Additel ADT 761A D operates from −0.95 to 2.5 bar and supports both differential and gauge pressure.

Its specified accuracy is 0.02 % FS.

This version is suitable for numerous industrial pressure calibration applications where low and medium differential or gauge pressures must be generated automatically.

Additel ADT 761A 500

The Additel ADT 761A 500 automatically generates and controls pressure from −0.9 to 35 bar.

An integrated barometric reference provides both gauge and absolute pressure capability.

Depending on the installed pressure module, accuracy of 0.01 % FS or 0.02 % FS is available.

Additel ADT 761A 1K

The Additel ADT 761A 1K covers pressures from −0.9 to 70 bar.

This configuration also supports gauge and absolute pressure and provides an attractive solution for higher pneumatic pressure calibration while maintaining the portability of the ADT 761A platform.

Additel ADT 761A 1.5K

The Additel ADT 761A 1.5K is designed for high pneumatic pressures up to 100 bar or 1,500 psi.

Depending on the pressure module, accuracy of 0.01 % FS or 0.02 % FS is available.

This model significantly extends the range of portable automatic pressure calibration and is particularly suitable for users who require automated pressure generation at higher pneumatic pressures.

Additel ADT 761A BP

The Additel ADT 761A BP was specifically developed for calibration of barometric pressure sensors.

Its operating range is 100 to 1,200 hPa, with an accuracy of 0.01 % FS.

This configuration is particularly suitable for barometric sensors, meteorological instruments and other applications involving precise absolute atmospheric pressure measurement.

Technical Highlights

• Automatic pressure generation: integrated
• Automatic pressure control: integrated
• Maximum pressure: 100 bar
• Low pressure range: ±75 mbar
• Barometric range: 100 to 1,200 hPa
• Accuracy: down to 0.01 % FS
• Control stability: down to 0.003 % FS
• Internal pressure modules: up to two
• External pressure modules: two
• HART communication
• PROFIBUS PA support
• Integrated data logging
• Integrated task management
• WiFi
• Bluetooth
• USB
• Ethernet

Technical Specifications

Automatic Pressure Generation and Control

The central feature of the Additel ADT 761A is fully automated pressure generation.

The operator enters the required setpoint and the instrument automatically generates and controls the pressure.

This significantly reduces manual effort, particularly when a calibration procedure requires multiple pressure points.

Automated pressure generation also helps establish consistent calibration workflows because the individual setpoints can be approached without repeated manual adjustment of a hand pump and fine control valve.

Two Internal Pressure Modules

The LLP, D, 500, 1K and 1.5K configurations can accommodate two internal pressure modules.

This allows a high pressure range to be combined with a smaller measurement range that more closely matches lower range devices under test.

This is particularly useful when instruments with significantly different pressure spans need to be calibrated using the same platform.

External Pressure Modules

Two external pressure modules can also be connected.

These modules extend the measurement capabilities of the ADT 761A beyond the internal automatic pressure generation ranges and provide additional flexibility for professional calibration laboratories.

HART and PROFIBUS PA Communication

The Additel ADT 761A provides communication capabilities for modern process instrumentation.

Supported protocols include:

• HART
• PROFIBUS PA

Intelligent pressure transmitters can therefore be tested and configured as part of a common calibration workflow.

Combined with automatic pressure generation and electrical measurement functions, this provides an efficient solution for calibrating modern process transmitters.

Data Logging and Task Management

The ADT 761A includes integrated data logging and task management.

Recurring calibration procedures can therefore be stored and documented directly with the instrument.

This reduces manual documentation effort and supports reproducible calibration workflows, particularly in professional calibration laboratories, quality assurance and maintenance.

europascal Calibration Service

The Additel ADT 761A should be calibrated regularly in accordance with the requirements of the user’s measuring equipment management system.

Through the europascal Calibration Service, pressure calibrators, pressure modules, pressure sensors, pressure transmitters and other pressure measuring instruments can be calibrated.

europascal can also assist you in selecting the appropriate ADT 761A version, internal pressure modules and suitable accessories.

For further information about calibration technology and services, visit the europascal English homepage.

Why Choose the Additel ADT 761A?

The Additel ADT 761A combines automatic pressure generation with high accuracy and an exceptionally wide range of available pressure configurations.

Six versions cover applications ranging from very low differential pressure at ±75 mbar to automatic pneumatic calibration at pressures up to 100 bar.

The ability to use two internal pressure modules significantly increases flexibility.

Two additional external pressure modules can also be connected.

HART, PROFIBUS PA, data logging and task management enable complete documented calibration workflows.

The Additel ADT 761A is therefore suitable for professional calibration laboratories, maintenance, production, quality assurance and mobile field service.

Typical Calibration Applications with the Additel ADT 761A

The Additel ADT 761A is particularly suitable for testing and calibrating:

• Differential pressure transmitters
• Pressure transmitters
• Pressure sensors
• Pressure gauges
• Pressure switches
• Barometric sensors
• Intelligent HART transmitters
• PROFIBUS PA process instrumentation

The LLP version is optimized for low differential pressures.

The D version covers differential and gauge pressure up to 2.5 bar.

The 500, 1K and 1.5K versions provide automatic pneumatic pressure generation up to 35 bar, 70 bar and 100 bar respectively.

The BP version is optimized for barometric applications between 100 and 1,200 hPa.

The Additel ADT 761A series therefore provides a versatile platform for professional automated pressure calibration.

Additional calibration equipment and services are available through the europascal English homepage.

Discover more products and calibration solutions from europascal.

Manufacturer information about the Additel ADT 761A is available on the official Additel product page.

Download Datasheet