Additel ADT 226 is a versatile multifunction process calibrator designed for professional calibration, maintenance and troubleshooting of process instrumentation. The handheld calibrator combines high-accuracy electrical measurement and sourcing with temperature measurement, loop calibration and pressure measurement using external Additel pressure modules.
With its rugged field-ready design, intuitive color touchscreen and comprehensive measurement functions, the ADT 226 provides technicians and calibration laboratories with a powerful solution for testing transmitters, sensors, switches, indicators and other process instrumentation.
The Additel ADT 226 measures and sources a broad range of electrical signals including voltage, current, resistance, frequency and pulse signals. It also supports thermocouples and RTDs, allowing the instrument to simulate and measure common industrial temperature sensors.
For pressure calibration, compatible Additel external pressure modules can be connected to the calibrator. This allows the ADT 226 to become a complete portable pressure calibration solution when combined with a suitable hand pump or pressure source.
An integrated 24 V loop power supply simplifies the calibration of 4–20 mA transmitters. HART communication capability further extends the ADT 226 for modern process instrumentation.
The calibrator is designed for demanding field conditions. A rugged enclosure, large touchscreen and rechargeable battery make it suitable for daily use in industrial plants, maintenance workshops and calibration laboratories.
At europascal, we provide professional calibration equipment for pressure, temperature and electrical measurement applications. The Additel ADT 226 can be combined with suitable pressure modules, calibration pumps and accessories to create a complete portable calibration solution.
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
- Multifunction process calibrator
- High-accuracy 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
- Thermocouple measurement and simulation
- RTD measurement and simulation
- 24 V loop power supply
- 4–20 mA transmitter calibration
- HART communication capability
- Pressure measurement with external Additel pressure modules
- Pressure switch testing
- Temperature transmitter calibration
- Large color touchscreen
- Intuitive graphical user interface
- Rechargeable battery
- Data logging capability
- Rugged portable design
- Suitable for laboratory and field calibration
- Ideal for process instrumentation maintenance
Multifunction Process Calibration
The Additel ADT 226 combines multiple calibration functions within one portable instrument.
Instead of carrying separate devices for current, voltage, resistance, temperature and pressure measurement, technicians can perform many common process calibration tasks using a single platform.
Typical devices under test include:
- Pressure transmitters
- Temperature transmitters
- Pressure gauges
- Pressure switches
- RTD indicators
- Thermocouple indicators
- Process controllers
- Recorders
- Data loggers
- Current loops
- Electrical indicators
This broad functionality makes the ADT 226 suitable for both field service and calibration laboratory applications.
Electrical Measurement
The Additel ADT 226 provides precision electrical measurement for common process signals.
Depending on the selected function, the calibrator can measure:
- DC voltage
- DC current
- Resistance
- Frequency
- Pulse signals
- Thermocouples
- RTDs
This allows technicians to troubleshoot and calibrate a wide variety of industrial process instruments.
Electrical Signal Generation
In addition to measurement, the Additel ADT 226 can generate electrical signals.
Source functions include:
- DC voltage
- DC current
- Resistance
- Frequency
- Pulse
- Thermocouple simulation
- RTD simulation
Signal generation is particularly important when calibrating indicators, transmitters, controllers and data acquisition systems.
A defined reference signal is generated by the ADT 226 and compared with the indication or output of the device under test.
4–20 mA Process Calibration
The Additel ADT 226 is particularly useful for calibration of industrial:
4–20 mA current loops
These current loops are widely used for transmitting measurement values in industrial process systems.
The calibrator can measure and source current signals, allowing both transmitters and receiving instruments to be tested.
Typical applications include:
- Pressure transmitters
- Temperature transmitters
- Flow transmitters
- Level transmitters
- Process indicators
- PLC input modules
- Control systems
24 V Loop Power
The integrated loop power supply can provide the power required by a two-wire process transmitter.
This eliminates the need for a separate external power supply in many calibration setups.
The technician can power the transmitter and measure its output using the same handheld calibrator.
This significantly simplifies field calibration.
HART Communication
The Additel ADT 226 provides HART communication capability for compatible process transmitters.
HART is widely used in modern industrial instrumentation because it combines conventional 4–20 mA analog signals with digital communication.
HART functionality allows technicians to work with transmitter information and parameters while performing calibration and maintenance tasks.
This makes the ADT 226 suitable for modern smart transmitter applications.
Temperature Calibration
Temperature calibration is another important application of the Additel ADT 226.
The calibrator supports both:
RTDs
and:
thermocouples
These sensor types cover a large proportion of industrial temperature measurement applications.
The ADT 226 can measure physical temperature sensors and simulate sensor signals for testing temperature indicators and transmitters.
RTD Measurement
Resistance temperature detectors can be connected directly to the ADT 226.
The calibrator measures the resistance of the sensor and converts it into the corresponding temperature according to the selected RTD characteristic.
This allows direct measurement of common industrial RTDs.
Typical applications include:
- Pt100 sensors
- Temperature probes
- Temperature transmitters
- Process temperature measurement systems
RTD Simulation
The Additel ADT 226 can also simulate RTDs.
Instead of using an actual temperature source, the calibrator generates the resistance corresponding to a selected temperature.
An RTD transmitter or temperature indicator interprets this resistance as if a real RTD sensor were connected.
This provides a fast method for checking the electronic portion of a temperature measurement chain.
Thermocouple Measurement
Thermocouples generate a small voltage depending on the temperature difference between the measuring and reference junctions.
The ADT 226 can measure thermocouple signals and convert the voltage into the corresponding temperature.
Support for common industrial thermocouple characteristics allows the calibrator to cover a wide range of temperature applications.
Thermocouple Simulation
For transmitter and indicator calibration, the Additel ADT 226 can simulate thermocouple signals.
The required temperature is entered directly into the calibrator.
The ADT 226 then generates the corresponding thermoelectric voltage.
This allows devices such as:
- Temperature transmitters
- Temperature indicators
- Process controllers
- Data loggers
- Recorders
to be calibrated without requiring a physical thermocouple and temperature source.
Pressure Measurement
Pressure measurement can be added to the Additel ADT 226 using compatible external Additel pressure modules.
The modular approach allows the user to select pressure ranges according to the individual calibration workload.
This makes it possible to use one ADT 226 with different pressure modules rather than requiring a separate pressure calibrator for every range.
Pressure Calibration System
When the ADT 226 is combined with an external pressure module and a suitable Additel pressure pump, it becomes a complete portable pressure calibration system.
The pump generates the test pressure.
The external pressure module provides the reference pressure measurement.
The ADT 226 measures the electrical output of the device under test.
This configuration is particularly useful for calibration of pressure transmitters.
Pressure Transmitter Calibration
A typical pressure transmitter converts an applied pressure into a:
4–20 mA
electrical output signal.
During calibration, a suitable pressure pump generates the test pressure.
The Additel pressure module connected to the ADT 226 measures the applied reference pressure.
At the same time, the ADT 226 measures the transmitter’s current output.
This allows the pressure input and electrical output to be evaluated using one portable calibration system.
Pressure Switch Testing
The Additel ADT 226 can also be used for pressure switch testing.
During the test, pressure is gradually increased or decreased while the calibrator monitors the switch status.
This allows important switch characteristics to be determined, including:
- Switching point
- Reset point
- Deadband
Pressure switch testing is commonly required during maintenance and calibration of industrial safety and control systems.
Frequency and Pulse Functions
The ADT 226 supports frequency and pulse signals in addition to conventional voltage and current functions.
These functions expand the calibrator’s application range to instruments that use frequency-based process signals.
Typical applications can include:
- Frequency indicators
- Pulse counters
- Flow instrumentation
- Speed measurement systems
- Process controllers
Data Logging
The Additel ADT226 provides data logging functionality for recording measurement values over time.
Data logging is useful when measurements need to be monitored over a longer period or when a complete measurement sequence must be documented.
Typical applications include:
- Stability testing
- Process monitoring
- Troubleshooting
- Calibration documentation
- Long-term measurements
Recorded data can subsequently be evaluated and documented.
Large Color Touchscreen
A modern graphical user interface is one of the major advantages of the ADT 226.
The large color touchscreen provides clear access to measurement and source functions.
Operators can configure calibration tasks directly on the instrument without navigating through complex combinations of physical keys.
The graphical interface also makes simultaneous measurement information easier to interpret.
Portable Field Calibration
The Additel ADT 226 is designed for portable operation.
Its rechargeable battery allows the instrument to be used independently of an external power supply.
This is particularly useful in:
- Production plants
- Process facilities
- Maintenance departments
- Field service
- Remote measurement locations
The rugged enclosure is designed to withstand the conditions typically encountered during industrial field calibration.
Laboratory Applications
Although optimized for portable use, the ADT 226 is equally suitable for calibration laboratories.
Its broad range of electrical, temperature and pressure functions makes it useful as a flexible working standard for many routine calibration tasks.
A laboratory can configure the ADT 226 with different external pressure modules according to its pressure calibration range.
Process Industry Applications
The Additel ADT 226 is particularly suited to industries with large quantities of process instrumentation.
Typical industries include:
- Chemical industry
- Pharmaceutical industry
- Oil and gas
- Energy generation
- Water and wastewater
- Food and beverage
- Manufacturing
- Automotive
- Aerospace
- Process engineering
Technicians can use the same instrument for electrical, temperature and pressure-related calibration tasks.
Technical Highlights
The Additel ADT 226 combines multiple process calibration functions in one portable platform:
- Multifunction Process Calibrator
- DC voltage measurement and source
- DC current measurement and source
- Resistance measurement and simulation
- Frequency measurement and source
- Pulse measurement and source
- Thermocouple measurement
- Thermocouple simulation
- RTD measurement
- RTD simulation
- 24 V loop power
- 4–20 mA calibration
- HART communication
- External pressure module support
- Pressure transmitter calibration
- Pressure switch testing
- Data logging
- Color touchscreen
- Rechargeable battery
- Portable design
- Laboratory and field use
Typical Applications
The Additel ADT 226 can be used for a wide range of professional calibration and maintenance tasks:
Pressure transmitter calibration
Measure reference pressure using an external Additel pressure module while simultaneously measuring the transmitter’s electrical output.
Temperature transmitter calibration
Simulate an RTD or thermocouple signal and measure the resulting 4–20 mA transmitter output.
RTD indicator calibration
Generate a defined resistance corresponding to a specified RTD temperature.
Thermocouple indicator calibration
Generate the thermoelectric voltage corresponding to the selected thermocouple type and temperature.
Current loop calibration
Source or measure standard 4–20 mA process signals.
Pressure switch testing
Determine switching point, reset point and deadband.
Process troubleshooting
Measure voltage, current, resistance, frequency and temperature signals directly in industrial systems.
Why Choose the Additel ADT 226?
The Additel ADT 226 combines the functions required for many everyday process calibration tasks within one compact portable instrument.
Electrical measurement and sourcing capabilities allow voltage, current, resistance, frequency and pulse signals to be tested.
RTD and thermocouple measurement and simulation extend the instrument into professional temperature calibration.
An integrated 24 V loop power supply simplifies calibration of two-wire transmitters, while HART communication provides additional support for modern smart process instrumentation.
External Additel pressure modules extend the system into pressure calibration applications.
Combined with a suitable pressure pump, the ADT 226 can simultaneously measure the reference pressure and electrical output of a pressure transmitter.
This multifunction approach reduces the number of individual instruments technicians need to carry into the field.
The color touchscreen provides intuitive operation, while rechargeable battery power enables independent field use.
For calibration laboratories, maintenance departments and process industry technicians requiring a single instrument for electrical, temperature and pressure calibration tasks, the Additel ADT 226 provides a flexible and efficient solution.
At europascal, we can assist with configuring the ADT 226 with suitable Additel pressure modules, pressure pumps and accessories for your individual calibration requirements.
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 from Additel.
