Additel ADT222A is a versatile multifunction process calibrator for sourcing, simulating and measuring pressure, temperature and electrical signals. Building on the comprehensive temperature and electrical capabilities of the ADT221A, the ADT222A adds pressure measurement and sourcing capability through compatible Additel intelligent digital pressure modules. This combination makes it an excellent portable solution for calibration laboratories, industrial maintenance, commissioning and field service.

The Additel ADT222A combines pressure, RTD, thermocouple and electrical calibration functions in one compact handheld instrument. It measures and sources mV, mA, resistance, RTDs, thermocouples, frequency and pulses while also providing a 24 V loop power supply, simultaneous dual readings, automatic switch testing and documenting functions.

For temperature applications, the ADT222A supports 13 thermocouple types and 11 RTD types. For pressure applications, compatible Additel intelligent digital pressure modules extend the system from vacuum up to high pressure. Additel specifies pressure capability from approximately -1 bar to 700 bar (-15 psi to 10,000 psi) with the ADT160A module family described for the ADT222A.

A major advantage is the modular concept. Calibration characteristics are stored directly in the compatible pressure module. When the module is connected, the ADT222A automatically recognizes it and displays pressure as a measurement or source function. The modules can also be hot-swapped, making it easy to change pressure ranges during calibration work.

At europascal, we provide professional solutions for pressure, temperature and electrical calibration technology. The Additel ADT222A is particularly attractive for users who want to combine several process calibration tasks in one portable platform.

For professional calibration and metrological traceability of your measurement and calibration equipment, visit the europascal Calibration Service.

Your Benefits at a Glance

The Additel ADT222A combines pressure, temperature and electrical calibration with documenting and automated procedure capabilities.

Key benefits include:

• Multifunction process calibrator
• Pressure measurement and sourcing with compatible pressure modules
• Pressure capability from vacuum to high pressure
• Measurement and simulation of RTDs
• Measurement and simulation of thermocouples
• Supports 13 thermocouple types
• Supports 11 RTD types
• mV measurement and source
• mA measurement and source
• Resistance measurement and source
• Frequency measurement and source
• Pulse measurement and source
• 24 V loop power supply
• Simultaneous dual readings
• Automatic switch test
• Square root transmitter support
• Pulse frequency output for flow totalizer calibration
• Documenting calibration functions
• Automated calibration procedures
• As-found and as-left documentation
• Internal result storage
• Calibrated cold junction compensation
• Compact handheld design
• Smartphone-like user interface
• One-handed operation
• Rechargeable Li-ion battery
• ISO/IEC 17025 accredited calibration certificate

Multifunction Process Calibration

The Additel ADT222A is designed to reduce the number of separate instruments required for process calibration.

A typical process plant contains instruments for measuring:

• Pressure
• Temperature
• Flow
• Level
• Electrical process signals

Different calibrators are often required for these measurement quantities.

The ADT222A combines pressure, temperature and electrical functions in one portable platform, allowing technicians to perform a wide range of calibration and troubleshooting tasks with a single instrument.

Pressure Measurement and Source

Pressure capability is the key feature that differentiates the Additel ADT222A from the ADT221A.

The ADT222A can be connected to compatible Additel intelligent digital pressure modules.

With the ADT160A modules specified for this platform, Additel lists pressure capability from approximately:

-15 psi to 10,000 psi

or:

-1 bar to 700 bar.

Different pressure modules can therefore be selected according to the required range and accuracy.

This modular approach allows the same process calibrator to be used for several pressure ranges without integrating a fixed pressure sensor into the handheld instrument.

Intelligent Pressure Modules

The Additel ADT222A works with intelligent digital pressure modules.

Calibration characteristics are programmed directly into the compatible pressure module. Once connected, the ADT222A automatically recognizes the module and displays it as a pressure source or measurement function.

This concept provides several practical advantages.

The user can select a pressure module that is appropriate for the required pressure range rather than relying on one internal pressure sensor.

Modules can also be exchanged when different pressure ranges need to be covered.

Hot-Swappable Pressure Modules

For convenient operation, compatible pressure modules can be hot-swapped.

This means the technician can change modules conveniently when moving between different pressure calibration tasks.

For calibration laboratories that work with several pressure ranges, this modular approach can significantly increase flexibility.

A single ADT222A can serve as the central readout and process calibration platform while different pressure modules provide the required pressure ranges.

RTD Measurement and Simulation

The Additel ADT222A supports measurement and simulation of 11 RTD types.

Supported characteristics include commonly used sensors such as:

• Pt100 (385)
• Pt100 (3916)
• Pt100 (3926)
• Pt500 (385)
• Pt1000 (385)
• Copper RTDs
• Nickel RTDs

For the widely used Pt100 (385), the supported temperature range extends from:

-200 °C to 850 °C.

The ADT222A can therefore simulate an RTD electrically to test a temperature transmitter, indicator, controller or data acquisition system.

It can also measure RTD sensors and resistance signals.

Precise Pt100 Calibration

For a Pt100 (385), Additel specifies a 4-wire measurement accuracy of 0.10 °C from -200 °C to 200 °C. In 2-wire or 3-wire measurement, the specification in this range is 0.15 °C. The source specification is also 0.15 °C.

This makes the ADT222A suitable for electrical testing of Pt100-based measurement chains.

A technician can simulate the sensor resistance to verify the receiving instrument or measure the resistance of an actual RTD sensor.

Thermocouple Measurement and Simulation

The Additel ADT222A supports 13 thermocouple types for measurement and simulation.

This allows the calibrator to generate the electrical millivolt signal corresponding to a defined thermocouple temperature.

Typical devices under test include:

• Thermocouple transmitters
• Temperature indicators
• Process controllers
• PLC thermocouple inputs
• Data acquisition systems
• Temperature recorders

By simulating the thermocouple electrically, the response of the measurement electronics can be tested without generating a physical reference temperature.

Calibrated Cold Junction Compensation

Thermocouple calibration depends strongly on correct cold junction compensation.

The Additel ADT222A incorporates a cold junction equalizing block with a calibrated PRT element.

The PRT element can be removed from the calibrator, recalibrated and corrected at the ice point.

This provides an important metrological advantage because the cold junction compensation sensor itself can be checked and recalibrated.

For laboratories performing demanding thermocouple calibration, this gives greater control over an important contribution to the overall measurement uncertainty.

Electrical Signal Measurement and Source

The Additel ADT222A also provides comprehensive electrical measurement and source functions.

Supported electrical functions include:

• mV
• V
• mA
• Resistance
• Frequency
• Pulse

as well as RTD and thermocouple functions.

This allows technicians to test not only the primary sensor input but also electrical signals within the complete process measurement chain.

4–20 mA Process Signals

Current measurement and source capability make the Additel ADT222A suitable for working with standard 4–20 mA process signals.

A process transmitter may convert pressure, temperature or another physical quantity into a standardized current output.

The ADT222A can be used to measure or generate the electrical signal during calibration and troubleshooting.

This allows both the input and output sides of many process transmitters to be evaluated using the same instrument.

24 V Loop Power Supply

The Additel ADT222A provides an integrated:

24 V loop power supply.

This allows compatible two-wire transmitters to be powered directly during calibration.

A separate external loop supply is therefore unnecessary for many routine process calibration tasks.

For mobile field calibration, reducing the number of additional instruments and power supplies simplifies the setup considerably.

Simultaneous Dual Readings

The ADT222A supports simultaneous dual readings.

This is particularly useful when calibrating process transmitters because the technician often needs to monitor an input and an output at the same time.

For example, a pressure signal can be monitored while the electrical output of the transmitter is evaluated.

The ability to view multiple relevant parameters on one instrument simplifies process calibration and troubleshooting.

Automatic Switch Test

The Additel ADT222A includes an automatic switch test function.

This can be used when testing devices such as:

• Pressure switches
• Temperature switches
• Limit switches
• Process alarm contacts

Combining pressure module support with switch testing makes the ADT222A particularly useful for pressure switch calibration.

The calibrator can monitor the applied pressure and determine the switching behavior of the device under test.

Frequency and Pulse Functions

The ADT222A supports frequency and pulse measurement and generation.

Additel also specifies pulse frequency output for the calibration of flow totalizers.

This extends the application range beyond pressure and temperature instruments and makes the ADT222A useful for process calibration departments that also work with frequency-based measurement systems.

Documenting Calibration Functions

The Additel ADT222A incorporates documenting and automated procedure capabilities.

Users can manage information about the device under test and create structured calibration tasks.

Calibration procedures can be executed on the handheld calibrator, while results can be calculated, displayed and stored.

This allows the ADT222A to support a structured calibration workflow instead of operating only as an individual signal source or measuring device.

As-Found and As-Left Documentation

The ADT222A platform provides:

As-found

and:

As-left

functions.

As-found results document the condition of an instrument before adjustment or service.

As-left results document the condition after calibration or adjustment.

This information is valuable in quality-controlled calibration environments because it documents whether an instrument was within tolerance before intervention and how it performed afterwards.

Automated Calibration Procedures

Automated procedures reduce repetitive manual work during calibration.

Instead of manually entering each calibration point, the operator can work with prepared calibration tasks.

The system supports calculation of errors, result storage and identification of out-of-tolerance points as part of the documenting workflow.

This can improve consistency when the same type of instrument needs to be calibrated repeatedly.

Calibration Data Management

Calibration tasks and stored data can be managed using compatible Additel software.

The manufacturer lists Additel/Land and Additel/Cal in connection with the ADT22XA platform.

This allows stored calibration information to be transferred from the handheld instrument for further processing and management.

For calibration laboratories, this provides an efficient transition from manual field calibration to a more structured digital workflow.

Compact Handheld Design

Despite its broad functionality, the Additel ADT222A remains compact.

Additel specifies dimensions of approximately:

100 × 192 × 52 mm

and a weight of approximately:

0.7 kg.

The housing is designed for convenient one-handed operation.

This makes the ADT222A particularly suitable for technicians who perform calibration directly at industrial installations.

Smartphone-Like User Interface

The ADT222A uses a smartphone-like menu and interface.

This design provides straightforward access to the large number of measurement, source and documenting functions available within the calibrator.

For a multifunction process calibrator, intuitive operation is particularly important because technicians may regularly switch between pressure, temperature and electrical calibration tasks.

Rechargeable Battery

The Additel ADT222A uses a rechargeable Li-ion battery.

This supports mobile calibration work without requiring a permanent mains connection.

A rechargeable battery, external power adapter and test leads are included in the standard accessory package described by Additel. The ADT222A also includes the pressure module connection cable required for compatible pressure modules.

Additel ADT222A Compared with ADT221A

The key difference between the Additel ADT222A and ADT221A is pressure capability.

The ADT221A is primarily a:

Multifunction Temperature Calibrator

while the ADT222A is a:

Multifunction Process Calibrator.

The ADT222A takes the temperature and electrical functionality of the ADT221A and adds the ability to measure and source pressure using compatible Additel intelligent pressure modules.

This makes the ADT222A the more versatile solution when pressure instruments are part of the calibration workload.

Additel ADT222A Compared with ADT223A

The ADT223A builds on the functionality of the ADT221A and ADT222A and adds integrated HART communication.

The ADT222A does not provide the full HART communication capability of the ADT223A. Additel identifies HART communication specifically with the ADT223A in this product family.

The ADT222A is therefore well suited when pressure, temperature, electrical and documenting functions are required without an integrated HART communicator.

ISO/IEC 17025 Accredited Calibration

The Additel ADT22XA series is supplied with an:

ISO/IEC 17025 accredited calibration certificate.

This supports metrological traceability and provides documented calibration information for the instrument.

Regular calibration is important for maintaining confidence in the performance of process calibration equipment.

At europascal, we provide professional calibration services for pressure, temperature and electrical measurement equipment.

For further information about professional calibration and metrological traceability, visit the europascal Calibration Service.

Technical Highlights

Why Choose the Additel ADT222A?

The Additel ADT222A combines pressure, temperature and electrical calibration with documenting and automated procedure capabilities in one compact handheld instrument.

Its modular pressure concept is particularly attractive. Compatible intelligent digital pressure modules can be connected according to the required range, allowing the same process calibrator to cover applications from vacuum through high pressure. The module is automatically recognized by the calibrator, and compatible modules can be conveniently exchanged when the pressure range changes.

For temperature calibration, support for 13 thermocouple types and 11 RTD types covers a broad range of industrial temperature measurement systems. The calibrated and removable PRT used for cold junction compensation provides an additional metrological advantage for thermocouple applications.

Electrical functions including mV, V, mA, resistance, frequency and pulse generation and measurement allow the ADT222A to test complete process measurement chains.

Integrated documentation and automated procedures make it possible to create structured calibration tasks, record as-found and as-left results and store calibration data directly on the instrument.

Despite this broad functionality, the ADT222A weighs only approximately 0.7 kg, making it suitable for both laboratory and mobile field calibration.

At europascal, we provide professional solutions for pressure, temperature and electrical calibration technology and can assist you in selecting suitable Additel pressure modules and accessories for your application.

For professional calibration and metrological traceability of the Additel ADT222A and other process measuring instruments, visit the europascal Calibration Service.

Discover more Additel products at europascal.

Manufacturer information about the Additel ADT222A is available on the official Additel website.