Additel ADT 226Ex is an intrinsically safe multifunction process calibrator designed for professional calibration and maintenance work in hazardous industrial environments. It combines electrical signal measurement and sourcing, RTD and thermocouple functions, 4–20 mA loop calibration, HART communication and pressure measurement with compatible external Additel pressure modules in one portable platform.
The ADT 226Ex is the intrinsically safe version of Additel’s multifunction process calibrator concept. It is designed for technicians who need to calibrate process instrumentation in potentially explosive atmospheres where conventional electronic test equipment may not be permitted.
Its combination of electrical, temperature and pressure functionality makes the Additel ADT 226Ex particularly suitable for the oil and gas, petrochemical, chemical, pharmaceutical, energy and process industries.
The calibrator can measure and source common process signals including voltage, current, resistance, frequency and pulse signals. It also supports RTDs and thermocouples for temperature measurement and simulation.
An integrated loop power function supports calibration of industrial 4–20 mA transmitters, while HART communication provides access to compatible smart process instruments.
For pressure calibration, compatible intrinsically safe Additel pressure modules can be connected to the ADT 226Ex. Together with a suitable pressure source, the calibrator can be used to test pressure transmitters, pressure switches, gauges and other process instrumentation.
At europascal, we provide professional calibration equipment for pressure, temperature and electrical measurement applications. We can assist with configuring the Additel ADT 226Ex with suitable pressure modules, pumps and accessories for safe and efficient calibration work.
For professional calibration and metrological traceability of process calibrators, pressure modules, temperature measuring equipment and electrical measuring instruments, use the europascal Calibration Service.
Your Benefits at a Glance
- Intrinsically safe multifunction process calibrator
- Designed for hazardous-area applications
- Electrical measurement and sourcing
- DC voltage measurement and source
- DC current measurement and source
- Resistance measurement and simulation
- Frequency measurement and source
- Pulse measurement and source
- RTD measurement and simulation
- Thermocouple measurement and simulation
- 4–20 mA process loop calibration
- Loop power functionality
- HART communication
- Pressure measurement with compatible external modules
- Pressure transmitter calibration
- Pressure switch testing
- Temperature transmitter calibration
- Data logging
- Large color touchscreen
- Rechargeable battery
- Rugged portable construction
- Suitable for field and laboratory applications
- Ideal for oil and gas applications
- Ideal for petrochemical and process industries
Intrinsically Safe Process Calibration
The key feature of the Additel ADT 226Ex is its intrinsically safe design.
Industrial calibration work is frequently required in locations where flammable gases or vapors may be present.
Electrical equipment used in these areas must comply with the applicable hazardous-area requirements.
The ADT 226Ex is specifically designed for these demanding applications.
This allows qualified technicians to perform calibration and maintenance tasks in approved hazardous areas using a multifunction calibrator designed for such environments.
The exact Ex approval, permitted zone, equipment category and environmental conditions of the individual instrument must always be observed before use.
Multifunction Calibration in One Instrument
The Additel ADT 226Ex combines several measurement and simulation functions that would otherwise require multiple individual instruments.
It can be used for:
- Electrical calibration
- Temperature calibration
- Process transmitter calibration
- Pressure measurement
- Pressure switch testing
- Process loop testing
- HART communication
- Troubleshooting
This reduces the amount of equipment technicians need to carry into the field.
Electrical Measurement
The ADT 226Ex provides measurement functions for common electrical process signals.
These include:
- DC voltage
- DC current
- Resistance
- Frequency
- Pulse signals
Electrical measurement is essential when troubleshooting or calibrating process transmitters, indicators, controllers and automation systems.
Electrical Signal Generation
In addition to measurement, the Additel ADT 226Ex can generate a range of electrical signals.
Source and simulation functions include:
- DC voltage
- DC current
- Resistance
- Frequency
- Pulse
- RTD simulation
- Thermocouple simulation
This enables indicators and transmitters to be tested without requiring the corresponding physical sensor.
4–20 mA Calibration
The Additel ADT 226Ex is particularly useful for industrial 4–20 mA process loops.
The 4–20 mA standard is widely used for transmission of process values such as:
- Pressure
- Temperature
- Flow
- Level
- Differential pressure
The ADT 226Ex can measure and source current signals for calibration and troubleshooting of these systems.
Loop Power
Many industrial transmitters are two-wire devices powered directly through their current loop.
The ADT 226Ex provides loop power functionality for compatible applications.
This allows a transmitter to be powered while its output signal is measured.
A separate external loop power supply is therefore not required for many routine calibration tasks.
HART Communication
The Additel ADT 226Ex supports HART communication.
HART-enabled transmitters combine a conventional 4–20 mA analog signal with digital communication.
This allows technicians to work with compatible smart transmitters during commissioning, calibration and maintenance.
HART functionality is particularly valuable in modern process plants where intelligent transmitters are widely used.
Temperature Calibration
The ADT 226Ex supports both major industrial electrical temperature sensor technologies:
RTDs
and:
thermocouples
The instrument can measure temperature sensors as well as simulate their electrical output.
This allows both sensors and the electronic instruments connected to them to be tested.
RTD Measurement
Resistance temperature detectors can be connected to the Additel ADT 226Ex for direct measurement.
The calibrator measures the sensor resistance and converts it into temperature according to the selected RTD characteristic.
Typical applications include measurement and testing of:
- Pt100 sensors
- Industrial RTDs
- Temperature probes
- Temperature measurement systems
RTD Simulation
The ADT226Ex can simulate an RTD without requiring a physical temperature source.
The required temperature is selected on the calibrator.
The instrument then generates the corresponding resistance value.
The connected temperature transmitter or indicator interprets this resistance as a real RTD temperature.
This method is particularly useful for checking the electronic part of a temperature measurement chain.
Thermocouple Measurement
The Additel ADT 226Ex also measures thermocouple signals.
Thermocouples generate a small thermoelectric voltage corresponding to temperature.
The calibrator measures this voltage and converts it into temperature according to the selected thermocouple type.
This allows thermocouple probes and associated measurement systems to be tested.
Thermocouple Simulation
For calibration of temperature transmitters and indicators, the ADT 226Ex can generate thermocouple signals.
The desired temperature is entered directly into the calibrator.
The ADT 226Ex generates the corresponding thermoelectric voltage.
Typical devices under test include:
- Temperature transmitters
- Temperature indicators
- Data loggers
- Recorders
- Process controllers
- PLC temperature inputs
Temperature Transmitter Calibration
The combination of sensor simulation and electrical measurement makes the Additel ADT 226Ex particularly suitable for temperature transmitter calibration.
For an RTD transmitter, the calibrator can simulate a defined RTD temperature while simultaneously monitoring the transmitter’s electrical output.
For a thermocouple transmitter, the corresponding thermoelectric voltage can be generated instead.
The resulting transmitter output can then be evaluated at several calibration points.
Pressure Measurement
Pressure measurement can be added to the ADT 226Ex using compatible external Additel pressure modules designed for the applicable environment.
This modular approach allows the user to select pressure ranges according to the required workload.
One multifunction calibrator can therefore be combined with different pressure modules for different pressure applications.
Pressure Transmitter Calibration
The Additel ADT 226Ex is particularly useful for pressure transmitter calibration.
A suitable pressure source generates the required pressure.
The external pressure module provides the reference pressure measurement.
At the same time, the ADT 226Ex measures the electrical output from the transmitter.
For a conventional process transmitter, this will commonly be:
4–20 mA
This allows both pressure input and electrical output to be evaluated using one portable calibration platform.
Pressure Switch Testing
The ADT 226Ex can also support pressure switch testing.
During a pressure switch test, pressure is gradually increased or decreased while the electrical switch status is monitored.
Important parameters include:
- Switching point
- Reset point
- Deadband
This functionality is valuable for maintenance of industrial control and safety systems.
Frequency and Pulse Calibration
Frequency and pulse functions extend the application range of the Additel ADT 226Ex beyond conventional voltage and current signals.
Typical devices using frequency or pulse signals include:
- Flowmeters
- Pulse counters
- Speed measurement equipment
- Frequency indicators
- Process controllers
The ADT 226Ex can therefore support a broader process instrumentation workload.
Data Logging
The Additel ADT 226Ex provides data logging capability for recording measurement values and calibration information.
This is useful for applications such as:
- Process monitoring
- Stability measurements
- Troubleshooting
- Calibration documentation
- Long-term measurements
Digital recording reduces manual documentation and makes measurement sequences easier to evaluate.
Color Touchscreen
The large color touchscreen provides an intuitive interface for the instrument’s extensive functions.
Measurement values, source values and calibration information can be displayed clearly.
The graphical user interface simplifies switching between electrical, temperature and pressure-related applications.
This is especially useful for technicians who regularly perform different types of calibration work.
Rugged Portable Design
The Additel ADT 226Ex is designed for professional field use.
Its portable enclosure and rechargeable battery enable technicians to perform calibration tasks directly at the installation site.
This is particularly important in large industrial facilities where removing instrumentation for laboratory calibration can be time-consuming.
Oil and Gas Applications
Intrinsically safe calibration equipment is especially important in the oil and gas industry.
Typical ADT 226Ex applications include instrumentation used in:
- Oil production
- Natural gas production
- Gas processing
- Pipelines
- Refineries
- Storage facilities
- Distribution systems
The multifunction design allows technicians to work with pressure, temperature and electrical process instrumentation using one portable calibrator.
Chemical and Petrochemical Applications
Chemical and petrochemical plants contain large numbers of transmitters, switches and sensors.
The Additel ADT 226Ex can support calibration and maintenance of instrumentation used to measure:
- Pressure
- Temperature
- Flow
- Level
Its intrinsically safe design makes it particularly relevant for approved hazardous-area applications.
Pharmaceutical and Process Industries
The ADT 226Ex can also be used in other process industries where hazardous atmospheres may occur.
Typical applications include:
- Pharmaceutical manufacturing
- Chemical production
- Energy generation
- Industrial gases
- Process engineering
Its broad measurement capability helps standardize field calibration equipment across different instrument types.
Laboratory Applications
Although the ADT 226Ex is primarily optimized for field use, it can also be used in a calibration laboratory.
A laboratory that services equipment used in hazardous areas can use the same calibrator for workshop and field applications.
External pressure modules further extend the range of pressure calibration workloads that can be covered.
Typical Applications
The Additel ADT 226Ex can support a broad range of calibration tasks:
Pressure transmitter calibration
Measure the reference pressure with a compatible external pressure module while simultaneously measuring the transmitter output.
Temperature transmitter calibration
Simulate an RTD or thermocouple signal and measure the corresponding electrical output.
4–20 mA loop calibration
Measure or generate industrial current loop signals.
RTD indicator calibration
Simulate a defined resistance corresponding to a specified temperature.
Thermocouple indicator calibration
Generate the thermoelectric voltage corresponding to the selected thermocouple type and temperature.
Pressure switch testing
Determine switching point, reset point and deadband.
Process troubleshooting
Measure electrical and temperature signals directly in industrial systems.
ADT 226 or ADT 226Ex?
The standard Additel ADT 226 and the Additel ADT 226Ex provide a similar multifunction process calibration concept.
The major difference is the intended operating environment.
The standard ADT 226 is suitable for conventional industrial and laboratory environments.
The ADT 226Ex is designed for applications requiring appropriately certified intrinsically safe equipment.
For calibration work in potentially explosive atmospheres, the Ex version should therefore be selected according to the hazardous-area classification and the instrument’s applicable certification.
Why Choose the Additel ADT 226Ex?
The Additel ADT 226Ex combines multifunction process calibration with an intrinsically safe design for demanding industrial field applications.
Instead of carrying separate instruments for current, voltage, resistance, temperature and pressure-related measurements, technicians can use one portable calibration platform.
RTD and thermocouple measurement and simulation enable professional temperature transmitter and indicator calibration.
Current sourcing and measurement support 4–20 mA process loops, while HART communication provides additional functionality for smart process transmitters.
Compatible external pressure modules extend the instrument into pressure calibration and pressure transmitter testing.
The combination of a modern color touchscreen, data logging, rechargeable battery and rugged portable design makes the ADT 226Ex particularly useful for daily maintenance and calibration work.
Its intrinsically safe design is especially valuable in oil and gas, chemical, petrochemical and other process industries where calibration work must be performed in approved hazardous areas.
At europascal, we can help configure the Additel ADT 226Ex with suitable pressure modules, pressure pumps and accessories for your individual calibration application.
For professional calibration and metrological traceability of process calibrators, pressure modules, electrical measuring equipment and temperature measuring instruments, use the europascal Calibration Service.
Manufacturer information is available on the official Additel ADT 226Ex product page.
