The Additel ADT 761A-1K Automatic Pressure Calibrator is a powerful portable calibration system for fully automatic pneumatic pressure generation, control and measurement from vacuum up to 1,000 psi / 70 bar. Combining an integrated electric pump, precision pressure control, interchangeable internal pressure modules, electrical process calibration and advanced communication functions, the ADT 761A-1K is designed for demanding laboratory and field calibration applications.
The pressure range extends from:
-13 to 1,000 psig
or approximately:
-0.9 to 70 bar(g)
The ADT 761A-1K supports both:
Gauge Pressure
and:
Absolute Pressure
An integrated barometric reference allows the instrument to convert gauge pressure measurements into absolute pressure values without requiring a separate external barometer.
Depending on the selected internal pressure module, pressure accuracy is available as:
0.01 % FS or 0.02 % FS
with an excellent pressure control stability of:
0.003 % FS
The ADT 761A-1K accommodates two removable internal pressure modules, allowing a high-pressure range to be combined with a lower pressure range for improved measurement performance.
In addition to pressure generation and measurement, the ADT761A platform provides electrical process calibration, HART and PROFIBUS communication, pressure switch testing, task documentation and data logging.
The europascal calibration service provides professional calibration solutions for automatic pressure calibrators, pressure controllers, pressure modules, digital pressure gauges, pressure transmitters and pressure sensors.
Your Benefits at a Glance
The Additel ADT 761A-1K Automatic Pressure Calibrator provides:
- Fully automatic pneumatic pressure generation
- Integrated electric pressure pump
- Pressure generation from vacuum to 70 bar
- Maximum pressure of 1,000 psig
- Gauge pressure measurement
- Absolute pressure measurement
- Integrated barometric reference
- Pressure accuracy of 0.01 % FS or 0.02 % FS
- Pressure control stability of 0.003 % FS
- Two removable internal pressure modules
- High-range CP1K pressure module
- Configurable second internal pressure module
- Two external pressure module connections
- Electrical process measurement
- mA source and simulation
- 24 V loop power
- Pressure switch testing
- HART communication
- PROFIBUS communication
- Task documentation
- Integrated data logging
- Wi-Fi
- Bluetooth
- USB
- Ethernet
- Touchscreen operation
- Rechargeable battery
- Suitable for laboratory and mobile field calibration
Automatic Pressure Generation up to 70 bar
The Additel ADT 761A-1K automatically generates pneumatic pressure from vacuum up to:
70 bar(g)
or:
1,000 psig
The integrated electric pump eliminates the need for an external hand pump in many calibration applications.
The operator enters the required pressure setpoint and the ADT 761A-1K automatically generates, adjusts and stabilizes the pressure.
This provides a significant advantage over conventional calibration arrangements requiring separate components such as:
- Manual pressure pump
- Precision reference pressure gauge
- Fine adjustment valve
- Electrical process calibrator
- Loop power supply
- Communication device
The ADT 761A-1K combines these functions in one portable automated calibration platform.
Pressure Range from Vacuum to 1,000 psi
The operating range of the ADT 761A-1K extends from approximately:
-13 to 1,000 psig
or:
-0.9 to 70 bar(g)
This wide pneumatic pressure range makes the instrument suitable for many industrial pressure calibration applications.
The vacuum capability also allows instruments with negative gauge pressure ranges to be tested.
Gauge and Absolute Pressure
The Additel ADT 761A-1K supports both gauge and absolute pressure applications.
Gauge pressure is measured relative to atmospheric pressure:
p_gauge = p_absolute – p_atmosphere
Absolute pressure is referenced to an ideal vacuum:
p_absolute = p_gauge + p_atmosphere
The integrated barometric reference measures atmospheric pressure and enables the calibrator to determine absolute pressure from the internal gauge pressure measurement.
Integrated Barometric Reference
The integrated barometric reference is an important feature of the ADT 761A-1K.
It allows the same instrument to be used for:
- Gauge pressure instruments
- Absolute pressure instruments
- Atmospheric pressure measurement
Additel specifies a barometric accuracy contribution of:
55 Pa
For absolute pressure measurements, this additional 55 Pa uncertainty must be included together with the specification of the selected gauge pressure module.
This distinction is important when calculating the measurement uncertainty of an absolute pressure calibration.
Accuracy Down to 0.01 % FS
Depending on the selected pressure module, the Additel ADT 761A-1K provides pressure accuracy of:
0.01 % FS
or:
0.02 % FS
The specification is based on gauge pressure measurement.
FS refers to the span of the installed pressure module.
The specified accuracy includes one-year stability, making the module specification particularly relevant when evaluating the calibration interval and required measurement uncertainty.
Excellent 0.003 % FS Control Stability
The pressure control stability of the ADT 761A-1K is specified as:
0.003 % FS
This high level of control stability is particularly valuable for automated calibration.
After the instrument approaches a selected pressure setpoint, the integrated control system maintains a stable reference pressure so that the device under test can be evaluated under controlled conditions.
Two Removable Internal Pressure Modules
The Additel ADT 761A-1K can accommodate:
two removable internal pressure modules
The high-pressure range is covered by the appropriate high-range module, while a second internal module can be selected for a lower pressure range.
This multi-range concept is important because pressure module accuracy is specified relative to full scale.
Using a lower-range module for low-pressure measurements can therefore provide significantly better absolute measurement performance than using only the 70 bar module across the entire range.
Flexible Multi-Range Calibration
Consider a calibration laboratory that needs to calibrate both:
- 5 bar pressure transmitters
- 60 bar pressure gauges
Using only a 70 bar reference sensor for both applications may not provide the optimum uncertainty at 5 bar.
With the dual internal module concept, a lower-range module can be installed alongside the high-pressure module.
The ADT 761A-1K can therefore cover a broad pressure range while maintaining appropriate metrological performance for lower-range devices.
Two External Pressure Modules
The ADT761A platform also supports:
two external pressure modules
Compatible Additel intelligent digital pressure modules can be connected to extend the pressure measurement capability of the system.
This provides additional flexibility for calibration laboratories handling many different pressure ranges.
The external modules expand measurement capability but do not increase the automatic pressure-generation limit of the internal pneumatic system.
Electrical Process Calibration
The Additel ADT 761A-1K combines pressure calibration with electrical process measurement and source functions.
This is particularly useful for pressure transmitters.
A typical industrial transmitter converts pressure into a:
4–20 mA
output signal.
The ADT 761A-1K can automatically generate the required reference pressure while simultaneously measuring the electrical transmitter output.
This enables pressure and electrical measurements to be combined within a single calibration workflow.
mA and Voltage Measurement
The electrical process functions include measurement of:
- Current
- Voltage
These capabilities make the instrument suitable for calibration of pressure transmitters and other process instrumentation with electrical outputs.
Instead of requiring a separate digital multimeter, pressure source and reference pressure instrument, many calibration tasks can be performed using the ADT 761A-1K.
mA Source and 24 V Loop Power
The ADT761A platform also provides:
- mA source/simulation
- 24 V loop power
The integrated loop power function is particularly useful for two-wire pressure transmitters.
The calibrator can provide transmitter power while simultaneously generating the pressure and measuring the resulting electrical signal.
Pressure Switch Testing
The Additel ADT 761A-1K supports pressure switch testing.
The automatic pressure generation system can approach the switching point in a controlled manner.
This allows parameters such as:
- Switching pressure
- Reset pressure
- Switch hysteresis
to be evaluated efficiently.
Automatic pressure control reduces the manual adjustment normally required when testing pressure switches with a hand pump.
HART Communication
The ADT761A platform supports:
HART communication
This allows compatible intelligent pressure transmitters to be integrated into the calibration workflow.
HART functionality can be used for device communication, configuration and diagnostic tasks.
Combined with automatic pressure generation and electrical measurement, this makes the ADT 761A-1K particularly suitable for modern smart pressure transmitters.
PROFIBUS Communication
The ADT761A also supports:
PROFIBUS communication
This extends its capabilities beyond conventional analog 4–20 mA pressure transmitters.
Compatible digital process instruments can therefore be incorporated into calibration and maintenance workflows.
Automated Calibration Tasks
The Additel ADT 761A-1K supports task documentation and automated calibration procedures.
A predefined sequence can contain several pressure points.
The instrument can automatically generate the individual setpoints, stabilize the pressure and support the documentation of the resulting measurement data.
This is especially useful for repetitive calibration procedures.
Integrated Data Logging
The ADT761A provides integrated:
Data Logging
Measurement values can be recorded directly by the calibrator.
Data logging can be useful for:
- Pressure stability tests
- Long-term measurements
- Calibration documentation
- Process monitoring
- Troubleshooting
- Instrument evaluation
Together with task management, data logging helps reduce manual documentation work.
Modern Communication Interfaces
The Additel ADT 761A-1K provides several modern communication interfaces:
- Wi-Fi
- Bluetooth
- USB
- Ethernet
These interfaces support integration into digital calibration environments and simplify communication with computers and compatible peripheral equipment.
Portable Calibration Platform
Despite its automatic pressure generation capability up to 70 bar, the ADT 761A-1K is designed for portable use.
This is especially advantageous when the device under test cannot easily be removed from an industrial installation.
Instead of bringing the pressure instrument to a stationary laboratory pressure controller, the automatic calibration system can be taken into the field.
Typical Calibration Applications
The Additel ADT 761A-1K Automatic Pressure Calibrator is particularly suitable for calibration and testing of:
- Digital pressure gauges
- Analog pressure gauges
- Gauge pressure transmitters
- Absolute pressure transmitters
- Pressure sensors
- Pressure transducers
- Pressure switches
- 4–20 mA pressure transmitters
- HART pressure transmitters
- PROFIBUS process instruments
- Pneumatic process instrumentation
- Industrial pressure measuring equipment
Typical users include:
- Professional calibration laboratories
- Industrial maintenance departments
- Process industry
- Chemical industry
- Pharmaceutical industry
- Energy and power generation
- Instrument manufacturers
- Quality assurance departments
- Mobile field service
Technical Highlights
Model: Additel ADT 761A-1K
Device type: Automatic Pneumatic Pressure Calibrator
Pressure range: -13 to 1,000 psig
Pressure range: Approx. -0.9 to 70 bar(g)
Maximum pressure: 1,000 psig / 70 bar(g)
Pressure types: Gauge and Absolute
Barometric reference: Integrated
Pressure accuracy: 0.01 % FS or 0.02 % FS depending on module
Barometric accuracy contribution: 55 Pa
Pressure control stability: 0.003 % FS
Internal pressure modules: 2
Internal modules: Removable
External pressure module channels: 2
Pressure generation: Integrated electric pump
Pressure control: Fully automatic
Electrical process measurement: Yes
mA source/simulation: Yes
24 V loop power: Yes
Pressure switch testing: Yes
HART communication: Yes
PROFIBUS communication: Yes
Task documentation: Yes
Data logging: Yes
Wi-Fi: Yes
Bluetooth: Yes
USB: Yes
Ethernet: Yes
Technical Data
| Feature | Additel ADT 761A-1K |
|---|---|
| Device type | Automatic Pneumatic Pressure Calibrator |
| Pressure range | -13 to 1,000 psig |
| Pressure range | Approx. -0.9 to 70 bar(g) |
| Maximum positive pressure | 1,000 psi / 70 bar |
| Pressure types | Gauge / Absolute |
| Barometric reference | Integrated |
| Pressure accuracy | 0.01 % FS or 0.02 % FS |
| Additional absolute-mode contribution | 55 Pa |
| Control stability | 0.003 % FS |
| Internal pressure modules | 2 |
| Internal modules removable | Yes |
| External pressure modules | 2 |
| Automatic pressure generation | Yes |
| Integrated electric pump | Yes |
| Electrical process functions | Yes |
| mA / V measurement | Yes |
| mA source | Yes |
| 24 V loop power | Yes |
| Pressure switch test | Yes |
| HART | Yes |
| PROFIBUS | Yes |
| Task documentation | Yes |
| Data logging | Yes |
| Wi-Fi | Yes |
| Bluetooth | Yes |
| USB | Yes |
| Ethernet | Yes |
ADT 761A-1K vs. ADT 761A-500 and ADT 761A-1.5K
The ADT761A family provides several configurations for automatic pneumatic pressure calibration.
| Model | Pressure Range | Pressure Type | Control Stability |
|---|---|---|---|
| ADT 761A-500 | -0.9 to 35 bar | Gauge / Absolute | 0.003 % FS |
| ADT 761A-1K | -0.9 to 70 bar | Gauge / Absolute | 0.003 % FS |
| ADT 761A-1.5K | -0.9 to 100 bar | Gauge / Absolute | 0.003 % FS |
The ADT 761A-1K occupies the middle range between the 35 bar ADT 761A-500 and the 100 bar ADT 761A-1.5K.
For applications requiring pressures up to approximately 35 bar, the ADT 761A-500 may provide the more appropriate range.
For applications extending to 70 bar, the ADT 761A-1K provides a powerful portable solution.
Where pneumatic pressure generation up to 100 bar is required, the ADT 761A-1.5K extends the range further.
ADT 761A-1K vs. ADT 760A-MA
The ADT 760A-MA and ADT 761A-1K both provide automatic gauge and absolute pressure calibration, but they target different pressure requirements.
The ADT 760A-MA covers pressures up to approximately:
25 bar
while the ADT 761A-1K extends automatic pneumatic pressure generation to:
70 bar
The ADT 761A-1K also provides a dual internal pressure module architecture and extensive process calibration, communication, task and logging functions.
It is therefore particularly suitable for professional users requiring a wider automatic pneumatic pressure range and flexible multi-range calibration.
Calibration and Service by europascal
Regular calibration is important for maintaining the metrological performance of an automatic pressure calibrator.
For an ADT 761A-1K equipped with two internal pressure modules, both installed pressure modules should be considered when defining the required calibration scope.
For absolute pressure applications, the integrated barometric reference must also be considered.
The europascal calibration service provides professional calibration solutions for pressure calibrators, pressure controllers, pressure modules, digital pressure gauges, pressure transmitters and pressure sensors.
europascal can also support customers in selecting the appropriate ADT 761A configuration and suitable internal or external pressure modules.
Why Choose the Additel ADT 761A-1K?
The Additel ADT 761A-1K Precise Automatic Pressure Calibrator combines fully automatic pneumatic pressure generation from vacuum up to 1,000 psi / 70 bar, pressure accuracy down to 0.01 % FS and excellent 0.003 % FS pressure control stability.
Its two removable internal pressure modules provide flexibility when calibrating instruments with different measuring ranges.
An integrated barometric reference enables both gauge and absolute pressure calibration, while two external pressure module connections further expand the measurement capability.
Integrated electrical process calibration, mA sourcing, 24 V loop power, pressure switch testing, HART and PROFIBUS communication, task documentation and data logging make the ADT 761A-1K a comprehensive solution for professional pressure calibration.
Looking for the Additel ADT 761A-1K for automatic pneumatic pressure calibration up to 70 bar? Contact europascal for expert advice, suitable pressure module configurations, accessories and professional calibration services.
Further information about the Additel ADT 761A series from europascal can be found here.
Further pressure calibration products from europascal can be found here.
