The Additel ADT 760A-MA Automatic Pressure Calibrator is a high-performance handheld pressure calibrator combining automatic pressure generation, precision pressure measurement, closed-loop pressure control and electrical process calibration in one portable instrument. With an integrated electric pump and a maximum pressure capability of 25 bar, the ADT 760A-MA eliminates the need for manual pressure generation in many field and laboratory calibration applications.
The MA version covers pressures from vacuum up to:
-0.86 to 25 bar(g)
or:
-12.5 to 375 psig
Depending on the interchangeable ADT155 pressure module installed, pressure accuracy is:
0.01 % FS or 0.02 % FS
with a pressure control stability of:
0.005 % FS
A major advantage of the Additel ADT 760A-MA is its integrated barometric reference. This enables the calibrator to switch between gauge and absolute pressure measurement, making it particularly versatile for calibration of pressure transmitters, pressure sensors, digital pressure gauges, pressure switches and other process instrumentation.
The europascal calibration service provides professional calibration solutions for automatic pressure calibrators, pressure controllers, pressure modules, pressure gauges, sensors and transmitters.
Your Benefits at a Glance
The Additel ADT 760A-MA Automatic Pressure Calibrator provides:
- Fully automatic handheld pressure calibration
- Integrated electric pressure pump
- Automatic pressure generation and control
- Pressure generation from vacuum to 25 bar
- Range from -0.86 to 25 bar(g)
- Range from -12.5 to 375 psig
- Gauge pressure measurement
- Absolute pressure measurement
- Integrated barometric reference
- Accuracy of 0.01 % FS or 0.02 % FS depending on module
- 0.005 % FS pressure control stability
- Interchangeable internal ADT155 pressure modules
- Six-digit pressure resolution
- Two external pressure module channels
- Integrated electrical measurement and source channel
- mA measurement
- Voltage measurement
- Current source and simulation
- 24 V loop power
- Pressure switch testing
- Automatic calibration functions
- Built-in filter and liquid trap
- Bluetooth, Wi-Fi and USB communication
- Compact handheld construction
- Optional HART, data logging and task documentation with the MA-DL version
Automatic Pressure Generation up to 25 bar
The Additel ADT 760A-MA provides the highest internal pressure generation capability within the ADT760A handheld series.
The pressure range extends from:
-0.86 to 25 bar(g)
corresponding to:
-86 to 2,500 kPa(g)
or:
-12.5 to 375 psig
The negative gauge pressure capability allows vacuum pressures relative to atmosphere to be generated, while the integrated electric pump provides positive pneumatic pressure up to 25 bar.
This broad range makes the ADT 760A-MA suitable for many industrial pressure calibration applications without requiring an external hand pump or pressure source.
Fully Automatic Pressure Control
A conventional field pressure calibration system can require several individual components, including:
- Manual pressure pump
- Reference pressure gauge
- Fine adjustment valve
- Electrical process calibrator
- Loop power supply
- Pressure tubing and adapters
The Additel ADT 760A-MA combines many of these functions in one handheld instrument.
The required pressure is entered directly as a setpoint. The integrated electric pump generates the pressure and the internal controller automatically adjusts the pressure until the requested value is reached and stabilized.
This significantly reduces manual effort, particularly during multipoint calibrations with increasing and decreasing pressure sequences.
Accuracy up to 0.01 % FS
Depending on the installed interchangeable ADT155 pressure module, the ADT 760A-MA provides a pressure accuracy of:
0.01 % FS
or:
0.02 % FS
FS refers to the span of the installed pressure module.
A variety of ADT155 internal pressure modules are available. Selecting a module that is appropriately matched to the actual application can improve absolute measurement performance compared with using only the maximum 25 bar range.
Pressure Control Stability
The pressure control stability is specified as:
0.005 % FS
The stability specification refers to the full scale of the installed internal pressure module.
Stable pressure control is important for automated calibration because the device under test should be evaluated only after the reference pressure has reached a sufficiently stable condition.
The combination of automatic generation and closed-loop control makes the ADT 760A-MA particularly useful for repetitive calibration procedures.
Gauge Pressure Measurement
The Additel ADT 760A-MA supports conventional:
Gauge Pressure
Gauge pressure is measured relative to the surrounding atmospheric pressure.
A reading of 0 bar(g) therefore corresponds approximately to the current atmospheric pressure.
Gauge pressure is widely used for industrial pressure gauges, transmitters, switches and process measurement systems.
Absolute Pressure Measurement
Unlike the ADT 760A-D and ADT 760A-LLP, the MA version also supports:
Absolute Pressure
Absolute pressure is referenced to an ideal vacuum.
The relationship is approximately:
p_abs = p_gauge + p_atmosphere
The integrated barometric reference allows the ADT 760A-MA to determine atmospheric pressure and use this information to provide absolute pressure values.
This makes the MA version significantly more versatile when both gauge and absolute pressure instruments need to be calibrated.
For absolute pressure measurements, the additional uncertainty contribution of the internal barometric reference must be considered.
Integrated Barometric Reference
The Additel ADT 760A-MA incorporates a dedicated:
barometric reference
This enables switching between:
- Gauge pressure
- Absolute pressure
- Barometric pressure
without requiring a separate external barometer.
The integrated barometric reference is one of the main technical differences between the MA configuration and the D or LLP versions.
For absolute pressure measurement, Additel specifies an additional uncertainty contribution of:
55 Pa
which must be considered together with the gauge pressure measurement specification.
Interchangeable ADT155 Pressure Modules
The ADT 760A-MA uses interchangeable internal:
Additel ADT155 pressure modules
The maximum module supports pressure generation and measurement up to:
25 bar / 375 psi
Lower-range modules are available for applications where improved performance at lower pressures is required.
The interchangeable module concept allows the same calibrator platform to be adapted to different pressure ranges instead of permanently limiting the instrument to one internal sensor.
Six-Digit Pressure Resolution
Pressure is displayed with:
6-digit resolution
A wide range of engineering units is supported, including:
- Pa
- hPa
- kPa
- MPa
- bar
- mbar
- psi
- mmHg
- torr
- inHg
- inH₂O
- mmH₂O
- cmH₂O
- kgf/cm²
- Custom units
This provides flexibility for international and industry-specific calibration applications.
Four Measurement Channels
The ADT760A platform provides:
4 channels
These consist of:
- One internal pressure channel
- Two external pressure measurement channels
- One electrical measurement/source channel
Compatible external Additel pressure modules can therefore be connected in addition to the internal ADT155 module.
This significantly expands the measurement capability of the calibrator and allows additional pressure ranges to be integrated into a single calibration setup.
Integrated Electrical Process Calibration
The Additel ADT 760A-MA provides integrated electrical measurement and source functionality.
This is particularly useful for calibration of pressure transmitters.
A conventional pressure transmitter may convert pressure into a:
4–20 mA
electrical output.
The ADT 760A-MA can generate and measure the reference pressure while simultaneously measuring the electrical output of the transmitter.
This allows a complete pressure-to-current calibration to be performed with one compact instrument.
mA and Voltage Measurement
The electrical channel supports measurement of process current and voltage.
Typical applications include:
- 4–20 mA pressure transmitters
- Voltage-output pressure sensors
- Process indicators
- Control system inputs
- Pressure switches
Combining pressure and electrical measurement in one instrument reduces the amount of additional equipment required for field calibration.
Current Source and 24 V Loop Power
The ADT 760A-MA also provides electrical source and simulation functionality up to:
24 mA
An integrated:
24 V loop power supply
can be used to power compatible process transmitters during calibration.
This is especially useful for two-wire 4–20 mA transmitters, where the ADT 760A-MA can provide the pressure stimulus, transmitter power and electrical measurement within the same calibration setup.
Pressure Switch Testing
The Additel ADT 760A-MA supports:
pressure switch testing
The automatic pressure controller varies the pressure while the electrical channel monitors the switching state.
This allows parameters such as:
- Switching pressure
- Reset pressure
- Switch hysteresis
to be determined efficiently.
Automatic pressure generation is particularly useful for pressure switch testing because switching points can be approached more consistently than with purely manual pressure generation.
Built-In Filter and Liquid Trap
The ADT760A platform includes:
a built-in filter
and:
a built-in liquid trap
These components help protect the internal pneumatic system against contamination introduced through the connected device or pressure tubing.
Protecting the internal pump, controller and pressure module is especially important when the calibrator is regularly used in industrial field applications.
Optional Contamination Prevention System
Additel also offers an optional:
Contamination Prevention System (CPS)
for the ADT760A series.
The CPS provides additional protection against contamination entering the calibrator from connected instruments.
This can be particularly useful when calibrating pressure devices that have previously been operated with contaminated air or process media.
Modern Communication Interfaces
The Additel ADT 760A-MA supports:
Bluetooth
Wi-Fi
and:
USB
communication.
These interfaces allow the instrument to be integrated into modern calibration and documentation workflows.
Wireless communication is particularly useful for mobile calibration applications, while USB provides a conventional wired connection for data exchange and instrument management.
HART Communication with the MA-DL Version
The standard ADT 760A-MA should be distinguished from the:
ADT 760A-MA-DL
The DL version adds:
HART communication
This allows compatible smart transmitters to be accessed directly during calibration.
For applications where HART configuration, diagnostics and digital transmitter communication are required, the MA-DL configuration should therefore be selected.
Data Logging and Task Documentation
The corresponding:
ADT 760A-MA-DL
also provides advanced data logging and task documentation functions.
These features are useful for documented field calibration workflows where calibration procedures and measurement results need to be stored digitally.
The standard ADT 760A-MA remains the appropriate choice when automatic pressure generation, pressure measurement and integrated electrical calibration functions are required without the additional DL functionality.
Compact Handheld Design
Despite its integrated electric pump, automatic pressure controller, precision pressure measurement system and electrical process functions, the ADT760A platform weighs less than approximately:
1.8 kg / 4 lb
This compact design makes the instrument particularly suitable for mobile calibration work.
Instead of transporting a hand pump, reference pressure gauge, electrical calibrator and additional accessories, many common calibration tasks can be performed with one integrated system.
Typical Calibration Applications
The Additel ADT 760A-MA Automatic Pressure Calibrator is suitable for calibration and testing of:
- Gauge pressure transmitters
- Absolute pressure transmitters
- Pressure sensors
- Pressure transducers
- Digital pressure gauges
- Analog pressure gauges
- Pressure switches
- 4–20 mA pressure transmitters
- Process pressure instrumentation
- Barometric pressure instruments
- Pneumatic pressure measuring equipment
Typical users include:
- Professional calibration laboratories
- Industrial maintenance departments
- Process industry
- Chemical industry
- Pharmaceutical industry
- Power generation
- Quality assurance departments
- Instrument manufacturers
- Field service technicians
Technical Highlights
Model: Additel ADT 760A-MA
Device type: Automatic Handheld Pressure Calibrator
Pressure range: -0.86 to 25 bar(g)
Pressure range: -12.5 to 375 psig
Maximum positive pressure: 25 bar / 2.5 MPa
Pressure types: Gauge and absolute
Barometric reference: Integrated
Pressure accuracy: 0.01 % FS or 0.02 % FS depending on module
Additional absolute mode uncertainty: 55 Pa
Pressure control stability: 0.005 % FS
Resolution: 6 digits
Pressure generation: Integrated electric pump
Pressure control: Fully automatic
Internal pressure module: Interchangeable ADT155
External pressure channels: 2
Total channels: 4
Electrical measurement: Yes
Current source/simulation: Up to 24 mA
24 V loop power: Yes
Pressure switch test: Yes
Built-in filter: Yes
Built-in liquid trap: Yes
Communication: Bluetooth, Wi-Fi and USB
Weight: Less than 1.8 kg
HART: ADT 760A-MA-DL version
Data logging: ADT 760A-MA-DL version
Task documentation: ADT 760A-MA-DL version
Technical Data
| Feature | Additel ADT 760A-MA |
|---|---|
| Device type | Automatic Handheld Pressure Calibrator |
| Pressure range | -0.86 to 25 bar(g) |
| Pressure range | -12.5 to 375 psig |
| Maximum pressure | 25 bar / 2.5 MPa |
| Pressure types | Gauge, Absolute |
| Barometric measurement | Yes |
| Accuracy | 0.01 % FS or 0.02 % FS |
| Additional uncertainty in absolute mode | 55 Pa |
| Control stability | 0.005 % FS |
| Resolution | 6 digits |
| Internal module | Interchangeable ADT155 |
| Pressure generation | Integrated electric pump |
| Pressure control | Automatic |
| External pressure channels | 2 |
| Total channels | 4 |
| Electrical measurement | Yes |
| Current source/simulation | Up to 24 mA |
| 24 V loop power | Yes |
| Pressure switch test | Yes |
| Built-in filter | Yes |
| Built-in liquid trap | Yes |
| Communication | Bluetooth, Wi-Fi, USB |
| Weight | Less than 1.8 kg |
| HART | MA-DL version |
| Data logging | MA-DL version |
| Task documentation | MA-DL version |
ADT 760A-MA vs. ADT 760A-D and ADT 760A-LLP
The ADT760A series provides three basic pressure configurations:
| Model | Pressure Range | Pressure Type | Accuracy |
|---|---|---|---|
| ADT 760A-LLP | ±75 mbar | Gauge / Differential | 0.05 % FS |
| ADT 760A-D | -0.86 to 2.5 bar | Gauge / Differential | 0.01 or 0.02 % FS |
| ADT 760A-MA | -0.86 to 25 bar | Gauge / Absolute | 0.01 or 0.02 % FS |
The ADT 760A-MA provides the highest pressure capability within the portable ADT760A family.
It differs from the D and LLP versions in another important respect: instead of differential pressure capability, the MA version provides an integrated barometric reference and supports absolute pressure measurement.
The correct version therefore depends not only on the required maximum pressure but also on the required pressure type.
Calibration and Service by europascal
Regular calibration of an automatic pressure calibrator is important for maintaining reliable metrological performance.
The europascal calibration service provides professional calibration solutions for pressure calibrators, pressure controllers, pressure modules, digital pressure gauges, pressure transmitters and other pressure measuring equipment.
europascal can also support customers in selecting the appropriate ADT155 module, pressure range, accessories and ADT760A configuration.
Why Choose the Additel ADT 760A-MA?
The Additel ADT 760A-MA Precise Automatic Pressure Calibrator combines automatic pneumatic pressure generation from vacuum up to 25 bar, pressure accuracy as low as 0.01 % FS, 0.005 % FS control stability and an integrated barometric reference in one portable instrument.
Its ability to switch between gauge and absolute pressure makes the MA version particularly versatile for calibration laboratories and field technicians working with different types of pressure instrumentation.
Interchangeable ADT155 internal modules, two external pressure channels, electrical measurement and source functions, 24 V loop power, pressure switch testing and modern Bluetooth, Wi-Fi and USB communication provide a comprehensive platform for professional pressure calibration.
For applications requiring HART communication, data logging and task documentation, the ADT 760A-MA-DL provides the corresponding extended functionality.
Looking for the Additel ADT 760A-MA or an automatic handheld pressure calibration solution from vacuum to 25 bar? Contact europascal for expert advice, suitable pressure module configurations, accessories and professional calibration services.
Further pressure calibration products from europascal can be found here.
Manufacturer information about the Additel ADT 760A-MA can be found on the official Additel website.
