Additel ADT 793 is a powerful automatic high pressure controller and pressure generator designed for demanding hydraulic calibration applications up to 15,000 psi / 1,035 bar. The system combines precision pressure measurement, automatic pressure generation and fast pressure control in a compact benchtop instrument. An integrated hydraulic pump automatically generates the required pressure, eliminating the need for an external pressure source. This makes the ADT 793 an excellent solution for automated calibration, test benches, production testing and professional calibration laboratories.

Depending on the installed ADT 151 pressure module, the Additel ADT 793 provides accuracy specifications of 0.01 % RD, 0.01 % FS or 0.02 % FS. Control stability is below 0.005 % FS and can typically reach 0.003 % FS under suitable conditions. Additel specifies a settling time of less than 30 seconds under defined test conditions. The system therefore combines high accuracy with powerful automatic high-pressure generation and control.

At europascal, you receive professional support in selecting the appropriate configuration for your high-pressure 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

The Additel ADT 793 combines automatic hydraulic high-pressure generation with modular reference measurement technology for efficient and reproducible calibration processes.

• Automatic hydraulic pressure generation up to 15,000 psi / 1,035 bar
• Integrated hydraulic pump
• No external pressure source required
• Accuracy down to 0.01 % RD or 0.01 % FS
• Control stability <0.005 % FS, typically 0.003 % FS
• Settling time <30 seconds under specified conditions
• Interchangeable ADT 151 pressure module
• Internal and external pressure modules supported
• Gauge pressure measurement
• Absolute pressure measurement with optional ADT 151-BP barometric module
• Automatic or fixed range selection
• Fast, Standard and Custom control modes
• Maximum overshoot <1 % FS
• Integrated 800 ml fluid reservoir
• Optional external reservoir
• Optional Contamination Prevention System
• Pressure port filters for system protection
• Communication interfaces for automated test procedures
• Modular design for easy maintenance
• ADT 793 for hydraulic calibration using Diethylhexyl Sebacate
• ADT 793W for hydraulic calibration using water

Ideal for Demanding High-Pressure Calibration

The Additel ADT 793 was developed for applications where high hydraulic pressures need to be generated automatically, precisely and reproducibly.

Its operating capability up to 1,035 bar enables calibration of numerous high-pressure measuring instruments without requiring a separate external high-pressure source.

Typical applications include:

• DAkkS accredited calibration laboratories
• In-house calibration laboratories
• Quality assurance
• Production and manufacturing testing
• Research and development
• Mechanical engineering
• Plant engineering
• Process industries
• Energy supply
• Automated test benches
• Measuring equipment monitoring
• High-pressure calibration

The Additel ADT 793 is particularly suitable for calibrating high-pressure gauges, digital pressure instruments, pressure sensors and pressure transmitters.

Automatic pressure generation reduces manual effort compared with conventional hydraulic hand pumps or pressure comparators.

For automated production, test and calibration applications, the controller can be integrated into existing test systems.

Integrated Hydraulic High-Pressure Generation

A major advantage of the Additel ADT 793 is its integrated hydraulic pump.

Traditional high-pressure calibration systems often require a separate hydraulic pressure source or manual pressure generation.

The ADT 793 generates pressures up to 15,000 psi / 1,035 bar directly within the instrument.

This allows a more compact automated high-pressure calibration station to be created while reducing the number of external components required.

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

This is particularly beneficial during calibration sequences involving multiple increasing and decreasing pressure points.

Fast and Stable Pressure Control

High-pressure calibration requires not only accurate reference measurement but also stable and reproducible pressure control.

The Additel ADT 793 provides control stability of <0.005 % FS and typically 0.003 % FS under suitable conditions.

Additel specifies a settling time of less than 30 seconds under defined test conditions.

This enables individual pressure points to be approached efficiently during automated calibration sequences.

The controller provides three different control modes:

• Fast
• Standard
• Custom

These modes allow the control behavior to be adapted to different calibration requirements and devices under test.

Maximum pressure overshoot is specified at <1 % FS.

Modular ADT 151 Pressure Measurement

A key feature of the Additel ADT 793 is its modular pressure measurement concept.

The system accommodates an internal ADT 151 Dual Range pressure module.

An external pressure module can additionally be used for pressure control, enabling the system to be configured for different high-pressure applications.

Current ADT 151 modules for the ADT 793 extend up to 15,000 psi / 1,035 bar.

Depending on the selected module, different pressure ranges and accuracy classes are available.

The Dual Range technology provides two measurement ranges within one module, helping users cover different pressure ranges efficiently.

This modular concept also allows the reference measurement system to be adapted when calibration requirements change.

Gauge and Absolute Pressure Measurement

The Additel ADT 793 supports gauge pressure measurement as standard within the corresponding configuration.

An optional ADT 151-BP barometric reference module can be installed to extend the system for absolute pressure applications.

The barometric module enables the system to perform the corresponding conversion or calculation required for absolute pressure measurement.

This provides additional flexibility for laboratories that need to work with both gauge and absolute pressure instruments.

Optional Contamination Prevention System

For applications where contamination from devices under test could enter the hydraulic system, Additel offers an optional Contamination Prevention System (CPS).

The CPS is designed to reduce the introduction of contaminants into the pressure controller.

This can improve reliability and simplify maintenance when different industrial pressure instruments are regularly connected to the system.

Pressure connections are additionally equipped with filters to protect the hydraulic system.

According to the supplied technical information, these filters are in the range of 40 to 100 μm.

Integrated Fluid Management

The Additel ADT 793 includes an integrated fluid reservoir with a capacity of 800 ml.

An optional external reservoir can be used where additional fluid capacity is required.

For the ADT 793, the specified hydraulic pressure medium is Diethylhexyl Sebacate.

This distinction is important when selecting the correct pressure controller because the hydraulic medium must be compatible with the devices under test and the intended application.

For applications requiring water as the pressure medium, Additel provides the ADT 793W.

Technical Highlights

• Maximum pressure up to 15,000 psi / 1,035 bar
• Integrated hydraulic high-pressure pump
• No external pressure source required
• Accuracy options of 0.01 % RD, 0.01 % FS or 0.02 % FS
• Control stability <0.005 % FS
• Typical control stability 0.003 % FS
• Settling time <30 seconds under specified conditions
• Interchangeable ADT 151 Dual Range pressure module
• One internal pressure control module
• One external pressure control module
• Gauge pressure and optional absolute pressure
• Automatic or fixed range selection
• Fast, Standard and Custom control modes
• Maximum overshoot <1 % FS
• Integrated 800 ml fluid reservoir
• Optional external reservoir
• Optional Contamination Prevention System
• 1/4 BSP M pressure connection
• Integrated pressure port filters
• Oil-based and water versions available

Technical Specifications

Automatic High-Pressure Calibration

The Additel ADT 793 is particularly useful when high-pressure calibration procedures need to be automated.

Defined test points can be generated and controlled automatically, allowing recurring calibration sequences to be standardized.

Compared with manual hydraulic systems, automatic pressure generation reduces the amount of physical and manual adjustment required from the operator.

This can provide significant benefits when multiple pressure instruments or extensive calibration sequences need to be processed.

Calibration of High-Pressure Gauges

High-pressure analog and digital pressure gauges are typical devices under test for the Additel ADT 793.

The controller generates the required reference pressure automatically and stabilizes it at the specified test point.

The indication of the device under test can then be compared with the reference pressure.

Multiple increasing and decreasing pressure points can be generated to evaluate the pressure gauge across its operating range.

Pressure Sensor Calibration

The ADT 793 can also be used for calibration of high-pressure sensors.

Automatically generated pressure points provide defined reference conditions for evaluating the output of the sensor.

This is particularly useful in production, quality assurance and calibration laboratories where similar sensors need to be tested repeatedly.

The modular ADT 151 concept enables the reference range to be adapted to the required application.

Pressure Transmitter Calibration

Pressure transmitters can also be calibrated using the Additel ADT 793.

Defined hydraulic pressures are automatically generated and controlled while the corresponding transmitter output is evaluated using suitable measurement equipment.

This allows the pressure response of the transmitter to be checked across multiple calibration points.

Automated pressure generation is particularly beneficial when complete increasing and decreasing calibration sequences are required.

Load Volume Considerations

The external load volume is an important factor in hydraulic high-pressure calibration.

According to the supplied Additel specifications, the ADT 793 supports a maximum external load volume of 80 ml for pressures below 10,000 psi, with 50 ml recommended.

Between 10,000 and 15,000 psi, the maximum specified external load volume is 60 ml, with 35 ml recommended.

These values should be considered when designing the calibration setup and connecting devices under test.

Communication and Automated Test Systems

The Additel ADT 793 is designed for automated production, testing and calibration environments.

Available communication interfaces include:

• LAN
• USB
• RS232

These interfaces allow the controller to be integrated into automated test systems and calibration software.

This makes the ADT 793 suitable not only as a standalone high-pressure controller but also as part of a complete automated calibration workstation.

ADT 793 or ADT 793W?

In addition to the Additel ADT 793, Additel provides the ADT 793W as a dedicated water version.

The ADT 793 uses Diethylhexyl Sebacate as the hydraulic pressure medium.

The ADT 793W, in contrast, is designed for deionized water, distilled water or pure water.

The water version is particularly relevant for applications where contamination of the device under test with an oil-based hydraulic medium must be avoided.

Both versions provide automatic high-pressure generation and are designed for professional high-pressure calibration.

The choice between the ADT 793 and ADT 793W should therefore consider:

• Required maximum pressure
• Required accuracy
• Device under test
• Material compatibility
• Permitted hydraulic pressure medium
• Risk of contamination

ADT 793: hydraulic high-pressure calibration using Diethylhexyl Sebacate

ADT 793W: hydraulic high-pressure calibration using deionized, distilled or pure water

At europascal, we can assist you in selecting the appropriate version, ADT 151 pressure module and accessories for your high-pressure calibration application.

Why Choose the Additel ADT 793?

The Additel ADT 793 is particularly attractive for users who want to automate high-pressure calibration while reducing the requirement for external pressure generation equipment.

Its integrated hydraulic pump generates pressures up to 15,000 psi / 1,035 bar directly within the instrument.

The combination of automatic pressure generation, high control stability and modular ADT 151 reference measurement provides a powerful platform for professional high-pressure calibration.

The interchangeable pressure modules increase flexibility because the reference measurement system does not need to be permanently limited to a single range.

The optional CPS and integrated pressure port filters also support reliable operation when different devices under test are regularly connected.

For automated laboratory and production environments, LAN, USB and RS232 communication interfaces enable integration into existing test systems.

This combination makes the Additel ADT 793 suitable for calibration laboratories, quality assurance, production testing, research and development and industrial high-pressure measurement applications.

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

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

Discover more products and calibration solutions from europascal.

Detailed manufacturer specifications for the Additel ADT 793 are available in the official Additel ADT 793 product information.

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