The Additel ADT 760A-LLP Low Pressure Calibrator is a fully automatic handheld pressure calibrator specifically designed for precise low-pressure and differential pressure calibration. With an integrated electric pressure pump, automatic pressure generation and control, interchangeable internal pressure modules and comprehensive electrical measurement functions, the ADT 760A-LLP combines several calibration instruments in one compact portable system.
The LLP – Low Low Pressure – version is optimized for particularly small pneumatic pressures. Its maximum internal pressure module covers:
±30 inH₂O
or:
±75 mbar
The specified pressure accuracy is:
0.05 % FS
with a pressure control stability of:
0.005 % FS
For applications requiring substantially lower measuring ranges, interchangeable internal Additel ADT155 pressure modules are available with ranges down to:
±0.25 inH₂O
or approximately:
±0.62 mbar
This makes the Additel ADT 760A-LLP particularly suitable for calibration of differential pressure transmitters, low-pressure sensors, pressure switches and instrumentation used in ventilation, cleanrooms, filtration systems and industrial process applications.
The europascal calibration service provides professional calibration solutions for pressure calibrators, pressure controllers, pressure modules, differential pressure instruments, transmitters and other pressure measuring equipment.
Your Benefits at a Glance
The Additel ADT 760A-LLP Low Pressure Calibrator provides:
- Fully automatic low-pressure calibration
- Integrated electric pressure pump
- Automatic pressure generation and control
- Maximum internal range of ±75 mbar
- Maximum internal range of ±30 inH₂O
- Internal module ranges down to ±0.62 mbar
- Gauge pressure measurement
- Differential pressure measurement
- Pressure accuracy of 0.05 % FS
- Pressure control stability of 0.005 % FS
- Interchangeable internal ADT155 pressure modules
- Two external pressure module channels
- Integrated electrical measurement functions
- mA and voltage measurement
- Current source and simulation functions
- 24 V loop power
- Pressure switch testing
- Four measurement channels
- Integrated filter
- Integrated liquid trap
- Bluetooth communication
- Wi-Fi communication
- USB communication
- Compact handheld design
- Optional HART, data logging and task documentation with the DL version
Low Pressure Range up to ±75 mbar
The Additel ADT 760A-LLP is specifically designed for low and differential pressure applications.
The maximum compatible internal pressure module provides a measuring range of:
±75 mbar
or:
±30 inH₂O
This corresponds to approximately:
±7.5 kPa
Unlike higher-pressure calibrators, the LLP version is optimized for accurately generating, controlling and measuring very small positive and negative pressures.
This is particularly important in applications where only a few millibars or even fractions of a millibar need to be measured.
Internal Modules Down to ±0.62 mbar
One of the most important features of the Additel ADT 760A-LLP is its interchangeable internal pressure module.
Additel offers ADT155 modules with measuring ranges down to:
±0.25 inH₂O
which corresponds to approximately:
±0.62 mbar
This means the calibrator does not have to rely on the maximum ±75 mbar range for every application.
A pressure module can instead be selected to match the required calibration range.
This is particularly useful because the accuracy specification is related to the full span of the installed pressure module.
Accuracy of 0.05 % FS
The specified pressure accuracy of the LLP version is:
0.05 % FS
FS refers to the span of the selected internal pressure module.
This point is particularly important when selecting the appropriate ADT155 module.
For example, a very low differential pressure application can benefit from using a lower-range module instead of the maximum ±75 mbar module.
Selecting a pressure range close to the actual calibration requirement helps optimize absolute measurement performance.
Pressure Control Stability of 0.005 % FS
The specified pressure control stability is:
0.005 % FS
The stability specification is based on the full scale of the installed internal pressure module.
Stable pressure control is essential for low-pressure calibration because even small pressure fluctuations can become significant relative to the applied test pressure.
The automatic controller allows the instrument to approach and maintain pressure setpoints without continuous manual adjustment.
Fully Automatic Pressure Generation
A major advantage of the Additel ADT 760A-LLP is its built-in electric pressure pump.
A conventional differential pressure calibration setup can require several separate components:
- Low-pressure hand pump
- Precision reference pressure instrument
- Fine pressure adjustment system
- Electrical process calibrator
- Pressure tubing
- Test leads
The ADT 760A-LLP integrates pressure generation, pressure control, reference measurement and electrical process functions into one handheld instrument.
The operator enters the desired pressure setpoint and the instrument automatically generates and controls the requested pressure.
This significantly simplifies repetitive multipoint calibration procedures.
Gauge and Differential Pressure
The Additel ADT 760A-LLP supports:
Gauge pressure
and:
Differential pressure
This makes the instrument especially useful for low-pressure process instrumentation.
Typical devices include:
- Differential pressure transmitters
- Low-pressure transmitters
- HVAC pressure sensors
- Filter monitoring transmitters
- Cleanroom pressure transmitters
- Airflow-related differential pressure instruments
- Pressure switches
- Low-pressure gauges
Differential Pressure Applications
Differential pressure measurement is widely used when the difference between two pressure points is more important than their absolute pressure level.
Typical applications include:
Filter monitoring
A differential pressure transmitter can detect the increasing pressure drop across a filter as contamination increases.
Cleanroom monitoring
Very small pressure differences are used to maintain defined pressure cascades between rooms.
HVAC systems
Differential pressure can be used for monitoring ducts, fans, filters and airflow-related systems.
Flow measurement
Differential pressure across an orifice, nozzle or other primary element can be used to determine flow.
These applications make the low-pressure capability of the ADT 760A-LLP particularly valuable.
Interchangeable ADT155 Pressure Modules
The ADT 760A-LLP uses interchangeable internal:
Additel ADT155 pressure modules
The maximum compatible LLP module has a range of:
±30 inH₂O / ±75 mbar
Additional internal modules are available with substantially lower ranges.
This modular design allows users to select a pressure sensor that is better matched to the actual calibration task.
The internal pressure module is also removable, providing greater flexibility than an instrument with a permanently installed pressure sensor.
Four Measurement Channels
The ADT760A platform provides:
4 channels
These consist of:
- One internal pressure channel
- Two external pressure module channels
- One electrical measurement/source channel
The two external pressure channels can be used with compatible Additel external pressure modules.
This significantly expands the measurement capability of the calibrator and allows additional pressure ranges to be integrated into the calibration setup.
Integrated Electrical Measurement Functions
The ADT 760A, unlike the simplified ADT760S, provides integrated electrical calibration functions.
These include:
- mA measurement
- Voltage measurement
- Current source/simulation
- 24 V loop power
- Pressure switch testing
This is particularly useful when calibrating pressure transmitters with an electrical output.
A typical 4–20 mA pressure transmitter can therefore be supplied with pressure, electrically powered and measured using the same portable calibrator.
24 V Loop Power
The integrated:
24 V loop power
allows compatible process transmitters to be powered directly during calibration.
This eliminates the need for a separate external loop power supply in many field calibration applications.
The combination of automatic pressure generation and electrical signal measurement allows complete transmitter calibration with a compact test setup.
Pressure Switch Testing
The ADT 760A-LLP also supports:
pressure switch testing
The integrated automatic pressure generator can vary pressure while the electrical channel monitors the switching state.
This enables the determination of:
- Switching pressure
- Reset pressure
- Switch hysteresis
without requiring separate pressure generation and electrical measurement equipment.
Built-In Filter and Liquid Trap
The current ADT760A platform includes:
a built-in filter
and:
a built-in liquid trap
These features help protect the internal pneumatic system from contamination introduced through connected pressure instruments or tubing.
This is especially useful during field calibration where the cleanliness of the device under test cannot always be guaranteed.
Optional Contamination Prevention System
Additel also offers an optional:
Contamination Prevention System
for the ADT760A series.
This accessory provides additional protection for the internal pneumatic components when instruments with a higher contamination risk are connected.
Contamination control can contribute to long-term stability and reduce maintenance requirements.
Modern Communication Interfaces
The Additel ADT 760A-LLP provides:
Bluetooth
Wi-Fi
and:
USB
communication.
These interfaces support integration into digital calibration workflows and communication with compatible Additel software.
The combination of wireless and wired communication provides flexibility for both laboratory and field applications.
Optional HART Communication
The standard ADT 760A-LLP does not include HART communication.
For applications requiring HART functionality, Additel offers the corresponding:
ADT 760A-LLP-DL
version.
The DL configuration adds HART communication as well as additional documentation functionality.
This distinction is important when configuring the product for smart transmitter calibration.
Optional Data Logging and Task Documentation
Data logging and task documentation are also associated with the:
ADT 760A-LLP-DL
configuration.
The standard ADT 760A-LLP provides the pressure and electrical calibration functions required for conventional field calibration.
Customers requiring advanced documentation, HART communication and task-based workflows should select the DL configuration.
Compact Handheld Calibration System
The ADT760A platform weighs less than:
4 lb / 1.8 kg
Despite its compact size, the instrument combines:
- Electric pressure generation
- Automatic pressure control
- Precision pressure measurement
- External pressure module support
- Electrical measurement
- Electrical source functions
- Communication interfaces
This makes the ADT 760A-LLP particularly attractive for technicians who need to perform low-pressure calibrations directly in the field.
Technical Highlights
Model: Additel ADT 760A-LLP
Device type: Automatic Low Pressure Calibrator
Pressure type: Gauge and differential
Maximum internal range: ±75 mbar
Maximum internal range: ±30 inH₂O
Maximum internal range: Approx. ±7.5 kPa
Lowest available internal module range: ±0.62 mbar
Lowest available internal module range: ±0.25 inH₂O
Pressure accuracy: 0.05 % FS
Pressure control stability: 0.005 % FS
Pressure generation: Integrated electric pump
Pressure control: Fully automatic
Internal pressure module: Interchangeable ADT155
External pressure module channels: 2
Total channels: 4
Electrical measurement: Yes
Current source/simulation: Yes
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-LLP-DL version
Data logging: ADT 760A-LLP-DL version
Task documentation: ADT 760A-LLP-DL version
Technical Data
| Feature | Additel ADT 760A-LLP |
|---|---|
| Device type | Automatic Low Pressure Calibrator |
| Pressure range | Up to ±75 mbar |
| Pressure range | Up to ±30 inH₂O |
| Pressure range | Approx. ±7.5 kPa |
| Smallest available internal range | ±0.62 mbar / ±0.25 inH₂O |
| Pressure types | Gauge and Differential |
| Accuracy | 0.05 % FS |
| Control stability | 0.005 % FS |
| Internal module | Interchangeable ADT155 |
| Pressure generation | Built-in 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 | With LLP-DL version |
| Data logging | With LLP-DL version |
| Task documentation | With LLP-DL version |
ADT 760A-LLP vs. ADT 760A-D vs. ADT 760A-MA
The ADT760A series provides different configurations for different pressure ranges and pressure types.
| Model | Maximum 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 Additel ADT 760A-LLP is therefore the preferred version when the application requires particularly low differential or gauge pressures.
The ADT 760A-D extends the pressure capability to 2.5 bar while retaining differential pressure capability.
The ADT 760A-MA extends the positive pressure range to 25 bar and adds absolute and barometric pressure capability instead of differential pressure.
Typical Calibration Applications
The Additel ADT 760A-LLP Low Pressure Calibrator is particularly suitable for calibration and testing of:
- Differential pressure transmitters
- Low-pressure transmitters
- Low-pressure sensors
- HVAC pressure instruments
- Cleanroom pressure transmitters
- Filter monitoring transmitters
- Airflow-related pressure instrumentation
- Low-pressure switches
- Pneumatic instrumentation
- 4–20 mA pressure transmitters
- Process instrumentation
Typical users include:
- Professional calibration laboratories
- HVAC service organizations
- Pharmaceutical industry
- Cleanroom operators
- Chemical industry
- Process industry
- Industrial maintenance departments
- Quality assurance departments
- Instrument manufacturers
- Field service technicians
Calibration and Service by europascal
Low differential pressures place particularly high demands on calibration equipment because even small absolute pressure deviations can become significant relative to the measuring range.
Regular calibration of the reference pressure module is therefore important for maintaining reliable metrological performance.
The europascal calibration service provides professional calibration solutions for pressure calibrators, differential pressure instruments, pressure modules, pressure transmitters, sensors and other pressure measuring equipment.
europascal can also support customers with product selection, suitable pressure ranges, accessories and professional calibration solutions.
Why Choose the Additel ADT 760A-LLP?
The Additel ADT 760A-LLP Precise Low Pressure Calibrator combines automatic pressure generation, automatic pressure control, precision pressure measurement and electrical process calibration in one compact handheld instrument.
Its maximum internal pressure range of ±75 mbar, interchangeable ADT155 modules with ranges down to ±0.62 mbar, 0.05 % FS pressure accuracy and 0.005 % FS control stability make it specifically suited to demanding low-pressure and differential pressure calibration.
Gauge and differential pressure capability, two external pressure module channels, integrated electrical functions, 24 V loop power and pressure switch testing make the ADT 760A-LLP a versatile calibration solution for both laboratory and field applications.
Modern Bluetooth, Wi-Fi and USB communication further simplify integration into digital calibration workflows.
Looking for the Additel ADT 760A-LLP or an automatic solution for precise low and differential pressure calibration? Contact europascal for expert advice, suitable pressure module configurations and professional calibration services.
Further pressure calibration products from europascal can be found here.
