Additel ADT 773 is a high-performance automatic pneumatic pressure controller and pressure generator designed for precise calibration in low-pressure and differential-pressure applications. The latest ADT 773 series combines fast pressure generation, highly stable pressure control and modular reference measurement technology in a compact benchtop instrument. With the ADT 773-LLP and ADT 773-D versions, the platform covers pressure ranges from −380 inH₂O / approximately −0.95 bar up to 2,800 inH₂O / 7 bar. This makes the system suitable for sensitive low-pressure measurements as well as demanding differential-pressure applications at significantly higher pressures.

A key feature of the Additel ADT 773 is its integrated pneumatic pump. It provides automatic pressure generation without requiring a separate pressure supply for typical applications. At the same time, the controller achieves control stability of <0.003 % FS.

Under the test conditions specified by Additel, the settling time for a 20 % pressure step is less than 10 seconds. This combination of fast pressure generation and excellent stability makes the ADT 773 particularly suitable for automated calibration sequences and recurring tests involving numerous pressure points.

At europascal, you receive professional support in selecting the appropriate ADT 773 version, suitable ADT 151 pressure modules and accessories. For regular calibration and metrological traceability of your pressure measuring equipment, europascal also provides a professional Calibration Service.

Your Benefits at a Glance

The Additel ADT 773 combines precision pressure measurement with fast automatic pressure generation and a modular sensor concept.

• Pressure ranges from approximately −0.95 to 7 bar within the ADT 773 series
• ADT 773-LLP and ADT 773-D versions
• Integrated pneumatic pump
• No separate pressure source required for integrated pressure generation in typical applications
• Control stability <0.003 % FS
• Typical settling time below 10 seconds
• Accuracy down to 0.01 % FS with suitable ADT 151 modules
• Two interchangeable internal pressure modules
• Fast replacement of ADT 151 modules
• Automatic or fixed range selection
• Fast, Standard and Custom control modes
• Maximum overshoot <1 % FS
• Optional barometric reference module
• Optional Contamination Prevention System
• Three channels for controlling external valves
• Pressure switch testing for mechanical and electronic switches
• Large 7-inch color touchscreen
• RS232, USB and LAN
• Expandable communication with WiFi, Bluetooth and GPIB
• SCPI support for automated test systems
• 3U enclosure for 19-inch rack mounting

Ideal for Demanding Calibration Applications

The Additel ADT 773 was developed for professional applications where pressure needs to be generated and controlled automatically, quickly and reproducibly.

The platform is designed for automated production, testing and calibration applications.

Typical applications include:

• Calibration laboratories
• In-house calibration laboratories
• Quality assurance
• Production testing
• End-of-line test systems
• Research and development
• Process industries
• HVAC applications
• Cleanroom technology
• Filter monitoring
• Mechanical engineering
• Plant engineering
• Automated test stations
• Differential-pressure calibration

The Additel ADT 773 is suitable for calibrating differential pressure gauges, pressure sensors, pressure transmitters and other pneumatic pressure measuring instruments.

Automatic pressure generation reduces manual effort and supports reproducible calibration procedures.

Fast pressure control provides an additional advantage for automated testing. Under the specified conditions, the ADT 773 series can reach a new pressure value in less than ten seconds.

This fast settling performance can significantly reduce total test time during calibration sequences involving numerous measurement points.

Flexible Modular Design

A central advantage of the Additel ADT 773 is its modular architecture.

The instrument provides two slots for interchangeable ADT 151 pressure modules, allowing different pressure ranges to be combined within a single system.

According to the supplied manufacturer information, the modules can be exchanged in approximately 30 seconds. When the module compartment is opened, pressure is automatically released to support safe module replacement.

Automatic range selection enables the system to select an appropriate measurement range according to the requested pressure value.

Alternatively, a specific range can be selected manually.

This provides excellent flexibility when adapting the pressure controller to different calibration tasks.

An optional barometric reference module can also be installed, extending the modular measurement concept with a barometric reference.

External Valve Control

The Additel ADT 773 provides three channels for controlling external valves.

One channel is intended for the optional Contamination Prevention System (CPS).

The remaining two channels can be used, for example, to control an external vacuum pump or external shut-off valves.

This capability is particularly useful when the ADT 773 is integrated into more complex automated calibration systems or test benches.

Technical Highlights

The Additel ADT 773 provides advanced functionality for precise and automated pneumatic pressure calibration.

• Total series range from approximately −0.95 to 7 bar
• ADT 773-LLP up to 400 inH₂O / approximately 1 bar
• ADT 773-D up to 2,800 inH₂O / 7 bar
• Integrated pneumatic pressure pump
• Control stability <0.003 % FS
• Settling time <10 seconds under specified conditions
• Accuracy down to 0.01 % FS
• Precision down to 0.004 % FS
• Two interchangeable internal ADT 151 modules
• Multi-range capability
• Automatic or fixed range selection
• Fast, Standard and Custom control modes
• Maximum overshoot <1 % FS
• Maximum load volume 500 ml
• Optional CPS
• Filters at the pressure ports
• Optional barometric module
• Three external valve control channels
• Pressure switch testing
• 7-inch capacitive touchscreen
• 1280 × 800 pixel resolution
• RS232, USB and LAN
• SCPI command set

The exact accuracy specifications depend on the selected ADT 151 pressure module. Different specifications apply to the smallest differential-pressure ranges.

Technical Specifications

Integrated Automatic Pressure Generation

One of the major advantages of the Additel ADT 773 is its integrated pneumatic pressure pump.

Conventional pressure controllers often require an external pressure supply. The integrated generation capability of the ADT 773 can reduce the number of external components required for typical calibration applications.

The operator specifies the required pressure point and the controller generates and regulates the pressure automatically.

This simplifies the setup of calibration stations and can be particularly beneficial where a compact automated pressure calibration system is required.

Fast and Stable Pressure Control

Speed is an important consideration in automated calibration and production testing.

Under the conditions specified by Additel, the Additel ADT 773 provides a settling time of less than 10 seconds for a 20 % pressure step.

At the same time, control stability is specified at <0.003 % FS.

The instrument also provides several control modes:

Fast for applications where rapid pressure changes are the priority.

Standard for general calibration applications.

Custom for applications requiring individually configured control behavior.

Maximum pressure overshoot is specified at <1 % FS.

These functions allow pressure control behavior to be adapted to different devices under test and calibration procedures.

Two Interchangeable ADT 151 Pressure Modules

Two internal ADT 151 pressure modules can be installed in the Additel ADT 773.

This modular concept enables two different pressure ranges to be available within one pressure controller.

The instrument can automatically select an appropriate range according to the requested pressure value, or the operator can select a fixed range.

The pressure modules can also be replaced when calibration requirements change.

According to the supplied information, module replacement takes approximately 30 seconds, making the ADT 773 a flexible solution for laboratories working with different pressure ranges.

Optional Contamination Prevention System

An optional Contamination Prevention System (CPS) is available for the ADT 773.

The CPS helps protect the internal pneumatic system against contamination from connected devices under test.

This can be particularly useful in calibration laboratories and service applications where pressure instruments from industrial processes are connected to the controller.

Filters at the pressure connections provide additional protection for the pneumatic system.

Pressure Switch Testing

The Additel ADT 773 also supports testing of mechanical and electronic pressure switches.

Automatic pressure generation and control can simplify the determination of switching points and support reproducible test conditions.

This functionality extends the controller beyond conventional pressure sensor and transmitter calibration and makes it suitable for production and end-of-line testing.

Communication and Automation

The Additel ADT 773 provides extensive communication capabilities for integration into automated calibration systems.

Standard interfaces include:

• RS232
• Two USB-A ports
• LAN

Additional communication options such as WiFi, Bluetooth and GPIB can be added.

The instrument supports the SCPI command set, facilitating integration into automated test systems and calibration software.

This makes the ADT 773 suitable both for standalone laboratory operation and as a component within automated calibration or production systems.

Integration into Existing Calibration Systems

The Additel ADT 773 is particularly interesting when existing automated calibration systems need to be modernized.

According to the supplied Additel information, an emulation mode supports various command structures associated with established pressure controller platforms.

Examples listed in the source information include pressure controllers from Fluke Calibration, Druck, Mensor and WIKA, including systems such as the Fluke Calibration 6270A, 8270A and 8370A.

This functionality can help reduce the integration effort when replacing an existing controller within an automated system.

The exact compatibility requirements should always be checked for the specific existing test system and software environment.

ADT 773-LLP or ADT 773-D?

The Additel ADT 773 is available in two versions designed for different pressure ranges.

The ADT 773-LLP is optimized for particularly low differential pressures.

Its operating range extends from −380 to 400 inH₂O or approximately −0.95 to 1 bar.

Depending on the installed ADT 151 pressure module, measurement ranges down to ±1 inH₂O or approximately ±2.5 mbar are available. Module-specific accuracy specifications apply to these particularly low pressure ranges.

The ADT 773-D extends the upper pressure range to 2,800 inH₂O or 7 bar.

It is therefore suitable for users who need to automatically generate and control higher differential pressures.

The ADT 773 series consequently provides a flexible platform:

• ADT 773-LLP for particularly low differential pressures up to approximately 1 bar
• ADT 773-D for higher differential-pressure ranges up to 7 bar
• Two interchangeable ADT 151 pressure modules for flexible range coverage
• Optional barometric module for additional measurement capabilities

Typical Calibration Applications with the Additel ADT 773

The Additel ADT 773 is particularly suitable for automated calibration of differential-pressure instruments, low-pressure gauges, pressure sensors and pressure transmitters.

In HVAC applications, differential-pressure measuring instruments used for filters and airflow monitoring can be calibrated automatically.

In cleanroom applications, instruments designed to measure small pressure differences can be calibrated with appropriate ADT 151 modules.

The ADT 773-D extends the application range to differential pressures up to 7 bar, enabling industrial applications beyond conventional low-pressure ranges.

The integrated pressure switch test supports mechanical and electronic pressure switches.

Combined with its automation capabilities, the controller can therefore also be used for production and end-of-line test systems.

Why Choose the Additel ADT 773?

The Additel ADT 773 is particularly suitable for users who want to automate low-pressure and differential-pressure calibration.

The integrated pump reduces the need for a separate pneumatic pressure supply and enables a compact calibration station.

Fast pressure control is another major advantage. In production environments or extensive calibration sequences, the time required to reach a stable test pressure can significantly affect total test time.

The ADT 773 combines a typical settling time of less than ten seconds under specified conditions with control stability of <0.003 % FS.

The modular ADT 151 concept enables the system to be adapted to different pressure ranges. Two modules can be installed simultaneously and exchanged if requirements change.

The extensive communication options and SCPI support also make the ADT 773 suitable for automated test stations.

At europascal, we can assist you in selecting the appropriate ADT 773 version and suitable ADT 151 pressure modules for your required pressure range and accuracy.

For regular calibration and metrological traceability of pressure controllers, reference pressure instruments and working standards, 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.

Detailed specifications and configuration information are available in the official Additel technical information for the ADT 773.

Manufacturer information about the Additel ADT 773 is available on the official Additel website.

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