The Additel ADT 760S-LLP Low Pressure Calibrator is a compact, fully automatic handheld pressure calibrator designed specifically for precise low gauge and differential pressure applications. It combines automatic pressure generation, closed-loop pressure control and interchangeable precision pressure modules in a portable instrument weighing less than approximately 1.8 kg.
The LLP version is optimized for particularly small pneumatic pressures. Its maximum compatible internal pressure module provides a range of:
±30 inH₂O
or:
±75 mbar
corresponding to approximately:
±7.5 kPa
For applications requiring even lower pressure ranges, interchangeable internal Additel ADT155 pressure modules are available with ranges down to:
±0.25 inH₂O
or approximately:
±0.62 mbar
The pressure accuracy of the ADT 760S-LLP is:
0.05 % FS
with pressure control stability of:
0.005 % FS or 0.05 Pa, whichever is greater
The instrument supports both gauge pressure and differential pressure.
The Additel ADT 760S-LLP is therefore particularly suitable for calibration of differential pressure transmitters, low-pressure sensors, HVAC instrumentation, cleanroom pressure transmitters, filter monitoring systems and other sensitive pneumatic measuring equipment.
Unlike the ADT 760A, the ADT 760S is designed as a streamlined pressure-focused platform. It provides the same pressure ranges and pressure accuracy as the corresponding ADT 760A configurations but does not include the electrical ports and device communication functions of the ADT 760A.
The europascal calibration service provides professional calibration solutions for low-pressure calibrators, differential pressure instruments, pressure modules, pressure sensors and pressure transmitters.
Your Benefits at a Glance
The Additel ADT 760S-LLP Low Pressure Calibrator provides:
- Fully automatic low-pressure calibration
- Integrated electric pressure generation
- Automatic closed-loop pressure control
- Maximum internal pressure range of ±75 mbar
- Maximum internal pressure range of ±30 inH₂O
- Pressure module ranges down to ±0.62 mbar
- Gauge pressure measurement
- Differential pressure measurement
- Pressure accuracy of 0.05 % FS
- Control stability of 0.005 % FS or 0.05 Pa, whichever is greater
- Interchangeable internal ADT155 pressure modules
- Six-digit pressure resolution
- Two external pressure measurement channels
- Large capacitive touchscreen
- Bluetooth communication
- Wi-Fi communication
- USB communication
- Compact design weighing less than 1.8 kg
- Optional Contamination Prevention System
- Pressure-focused alternative to the ADT 760A-LLP
- No integrated electrical measurement ports
- No HART functionality
- No data logging
- No DL model version
Precise Low Pressure Calibration up to ±75 mbar
The Additel ADT 760S-LLP is specifically designed for low-pressure applications.
The maximum compatible internal pressure module covers:
±75 mbar
or:
±30 inH₂O
which corresponds to approximately:
±7.5 kPa
This range is significantly lower than that of conventional pneumatic pressure calibrators and makes the LLP version particularly suitable for sensitive differential pressure applications.
The instrument can automatically generate both positive and negative differential or gauge pressures around zero.
Pressure Ranges Down to ±0.62 mbar
The maximum ±75 mbar range is not the only available measuring range.
The ADT 760S-LLP uses interchangeable internal:
ADT155 pressure modules
Additel provides module ranges extending down to:
±0.25 inH₂O
or approximately:
±0.62 mbar
Selecting an internal module that closely matches the actual calibration range is particularly important for low-pressure measurements.
Because the accuracy specification is based on the span of the installed pressure module, an appropriately selected low-range module can provide much better absolute measurement performance than using the maximum ±75 mbar module for every application.
Accuracy of 0.05 % FS
The pressure accuracy specified for the Additel ADT 760S-LLP is:
0.05 % FS
FS means Full Scale and refers to the span of the installed internal pressure module.
This distinction is important when evaluating the absolute uncertainty contribution of the calibrator.
For example, an application involving only very small differential pressures should ideally use an appropriately low-range ADT155 module rather than the maximum ±75 mbar module.
Pressure Control Stability
Additel specifies pressure control stability as:
0.005 % FS or 0.05 Pa, whichever is greater
The stability specification is based on the full-scale span of the internal pressure module.
The additional 0.05 Pa minimum criterion becomes particularly relevant for the smallest LLP pressure ranges.
Stable pressure control is especially important at very low pressures because even pressure variations of only a few pascals can represent a significant proportion of the applied test pressure.
Fully Automatic Pressure Generation
The Additel ADT 760S-LLP eliminates the need for manual pressure generation in many low-pressure calibration applications.
The required pressure setpoint is entered directly into the instrument.
The integrated pressure generation and control system then automatically approaches and stabilizes the requested pressure.
This replaces many conventional calibration arrangements involving:
- Manual low-pressure pump
- Reference pressure instrument
- Fine pressure adjustment valve
- Pressure tubing
- Separate pressure control components
The result is a compact automatic low-pressure calibration system suitable for both laboratory and mobile applications.
Gauge Pressure Measurement
The ADT 760S-LLP supports:
Gauge Pressure
Gauge pressure is measured relative to atmospheric pressure.
This mode is commonly used for low-pressure sensors, pneumatic instruments and pressure transmitters where the surrounding atmospheric pressure is used as the reference.
Differential Pressure Measurement
The ADT 760S-LLP also supports:
Differential Pressure
Differential pressure represents the pressure difference between two pressure ports:
Δp = p₁ − p₂
This measurement principle is widely used in applications where very small pressure differences must be determined accurately.
Typical examples include:
- Filter monitoring
- HVAC systems
- Cleanrooms
- Ventilation systems
- Airflow measurement
- Differential pressure transmitters
- Low-pressure process instrumentation
Ideal for Cleanroom Pressure Calibration
Cleanrooms frequently operate with controlled pressure differences between adjacent rooms.
These pressure differences can be only a few pascals.
Maintaining a defined pressure cascade helps control the direction of airflow between different areas.
The availability of very low-range ADT155 modules makes the Additel ADT 760S-LLP particularly interesting for calibration of pressure instruments used in cleanroom monitoring.
Filter Monitoring Applications
Differential pressure is commonly used to determine the condition of air and process filters.
As a filter becomes contaminated, its flow resistance increases.
This causes the differential pressure across the filter to rise.
The ADT 760S-LLP can be used as a controlled reference pressure source for testing and calibrating differential pressure instruments used in these applications.
HVAC Applications
Heating, ventilation and air-conditioning systems frequently use low differential pressures for monitoring:
- Air ducts
- Filters
- Fans
- Room pressure
- Airflow
- Ventilation systems
The combination of automatic pressure generation and low-pressure measurement makes the ADT 760S-LLP well suited to HVAC calibration work.
Flow Measurement Applications
Differential pressure can also be used to determine flow.
Typical primary elements include:
- Orifice plates
- Venturi tubes
- Flow nozzles
- Pitot tubes
The relationship between differential pressure and flow depends on the particular measuring system.
The ADT 760S-LLP can provide defined differential pressures for testing the associated transmitters and measuring instruments.
Interchangeable ADT155 Pressure Modules
The interchangeable internal ADT155 pressure module is an important feature of the ADT 760S-LLP.
Instead of permanently limiting the calibrator to one pressure range, different compatible modules can be selected according to the required application.
The maximum LLP module provides:
±75 mbar / ±30 inH₂O
while lower ranges are available down to:
±0.62 mbar / ±0.25 inH₂O
This modular design allows the calibration system to be optimized for different low-pressure ranges.
Six-Digit Pressure Resolution
The ADT 760S-LLP provides:
6-digit pressure resolution
A wide range of engineering units is available, including:
- Pa
- hPa
- kPa
- MPa
- bar
- mbar
- psi
- mmHg
- torr
- inH₂O
- mmH₂O
- cmH₂O
- mH₂O
- kgf/cm²
- Custom units
For very low-pressure applications, units such as Pa, mbar and inH₂O are particularly useful.
Pressure Connection
The LLP configuration uses:
barb fittings
for its pressure connections.
These are well suited to the flexible pneumatic tubing commonly used for low and differential pressure applications.
Correct tubing installation is especially important at very low pressures.
Leaks, kinked tubing or changing tube volumes can influence settling behavior and measurement stability.
Pressure Output Rate
For the maximum LLP range, Additel specifies a pressure output time of:
less than 30 seconds
for:
30 inH₂O with a 100 ml test volume
The actual response time in a calibration setup depends on factors such as:
- Selected pressure range
- Connected volume
- Tubing volume
- Leakage
- Device under test
- Pressure setpoint
Minimizing unnecessary test volume can therefore improve pressure response.
External Pressure Module Support
In addition to the interchangeable internal pressure module, the ADT760S platform supports:
two external pressure module channels
Compatible external Additel pressure modules can therefore be used for additional pressure measurement applications.
These external channels expand the measurement flexibility of the instrument.
The pressure generation capability itself remains determined by the internal pneumatic system and the selected ADT 760S configuration.
ADT 760S – Streamlined Pressure-Focused Platform
The ADT 760S was developed for applications where automatic pressure generation is the primary requirement.
Additel describes the 760S as the streamlined version of the ADT760A platform.
It provides the same pressure ranges and pressure accuracy as the corresponding ADT760A models but does not include:
- Electrical measurement ports
- Electrical source functions
- Integrated device communication functions
This makes the ADT 760S-LLP particularly suitable when a precise automatic low-pressure source is required without the additional process-calibrator functionality of the ADT 760A.
No Integrated Electrical Measurement
The Additel ADT 760S-LLP should not be confused with the ADT 760A-LLP.
The 760S does not provide the integrated electrical measurement ports of the 760A.
For example, when calibrating a 4–20 mA differential pressure transmitter, the ADT 760S-LLP can generate and measure the pressure while a separate instrument can measure the electrical transmitter output.
Suitable external instruments may include:
- Digital multimeter
- Process calibrator
- Electrical reference instrument
- Data acquisition system
This approach is particularly practical for calibration laboratories that already use dedicated electrical reference equipment.
No HART Functionality
The ADT 760S family does not provide the integrated HART Field Communicator functionality available with appropriate ADT760A configurations.
Users requiring HART communication with intelligent pressure transmitters should therefore select the appropriate ADT 760A model.
For users primarily requiring automatic low-pressure generation and control, the ADT 760S-LLP provides the simpler solution.
No Data Logging
Additel specifies that:
data logging is available only on ADT760A models
The ADT 760S-LLP should therefore not be advertised with the integrated data logging functionality of the ADT 760A.
There are also no LLP-DL, D-DL or MA-DL variants within the ADT 760S family.
The ADT 760S series consists of:
- ADT 760S-LLP
- ADT 760S-D
- ADT 760S-MA
Modern Touchscreen Operation
The ADT760S platform features a large capacitive touchscreen.
Pressure setpoints and instrument functions can be configured directly through the user interface.
For repetitive calibration work, automatic setpoint generation eliminates much of the manual pressure adjustment required with conventional hand pumps.
This can make multipoint pressure calibration considerably more convenient.
Bluetooth, Wi-Fi and USB
The Additel ADT 760S-LLP supports:
Bluetooth
Wi-Fi
and:
USB
communication.
These interfaces provide flexible connectivity for supported device communication, software interaction and instrument maintenance.
They should not, however, be confused with the advanced process-device communication functionality available on appropriate ADT760A configurations.
Optional Contamination Prevention System
The ADT760A/760S platform supports Additel’s optional:
Contamination Prevention System – CPS
The system is designed to help prevent liquids and contaminants from entering the internal pneumatic system from a connected device under test.
Potential contaminants include:
- Moisture
- Oil
- Dirt
- Process residues
- Particles
Protecting the internal pneumatic components is particularly valuable when the calibrator is used in industrial field applications.
Compact Handheld Design
The ADT760S platform weighs less than:
4 lb / 1.8 kg
This makes it suitable for both laboratory and mobile calibration work.
Instead of transporting a separate low-pressure pump, pressure controller and reference pressure instrument, the user can perform many low-pressure calibration tasks with one compact automatic system.
Technical Highlights
Model: Additel ADT 760S-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
Control stability: 0.005 % FS or 0.05 Pa, whichever is greater
Over-range indication: 120 %
Pressure resolution: 6 digits
Pressure generation: Automatic
Pressure control: Automatic
Internal pressure module: Interchangeable ADT155
External pressure measurement channels: 2
LLP pressure connection: Barb fitting
Pressure output rate: <30 seconds at 30 inH₂O / 100 ml
Electrical measurement ports: No
HART: No
Data logging: No
DL version: No
Communication: Bluetooth, Wi-Fi and USB
Weight: Less than approximately 1.8 kg
Contamination Prevention System: Optional
Technical Data
| Feature | Additel ADT 760S-LLP |
|---|---|
| Device type | Automatic Low Pressure Calibrator |
| Maximum pressure range | ±75 mbar |
| Maximum pressure range | ±30 inH₂O |
| Maximum pressure range | Approx. ±7.5 kPa |
| Smallest available internal range | ±0.62 mbar / ±0.25 inH₂O |
| Pressure types | Gauge / Differential |
| Pressure accuracy | 0.05 % FS |
| Control stability | 0.005 % FS or 0.05 Pa, whichever is greater |
| Over-range indication | 120 % |
| Pressure resolution | 6 digits |
| Internal module | Interchangeable ADT155 |
| Pressure generation | Automatic |
| Pressure control | Automatic |
| Pressure connection | Barb fitting |
| Output rate | <30 s at 30 inH₂O / 100 ml |
| External pressure channels | 2 |
| Integrated electrical measurement | No |
| Integrated electrical source | No |
| HART | No |
| Data logging | No |
| DL model | No |
| Communication | Bluetooth, Wi-Fi, USB |
| Weight | <1.8 kg / 4 lb |
| CPS | Optional |
ADT 760S-LLP vs. ADT 760A-LLP
The pressure specifications of the ADT 760S-LLP and ADT 760A-LLP are essentially the same, but their functional scope is different.
| Feature | ADT 760S-LLP | ADT 760A-LLP |
|---|---|---|
| Maximum range | ±75 mbar | ±75 mbar |
| Smallest internal module | ±0.62 mbar | ±0.62 mbar |
| Pressure type | Gauge / Differential | Gauge / Differential |
| Accuracy | 0.05 % FS | 0.05 % FS |
| Stability | 0.005 % FS or 0.05 Pa | 0.005 % FS or 0.05 Pa |
| Automatic pressure generation | Yes | Yes |
| Interchangeable ADT155 module | Yes | Yes |
| Integrated electrical ports | No | Yes |
| HART functionality | No | Available depending on 760A configuration |
| Data logging | No | Available on ADT760A |
The ADT 760S-LLP is therefore the preferred choice when the primary requirement is automatic low-pressure generation and precise pressure control.
The ADT 760A-LLP should be selected when pressure calibration must also be combined with integrated electrical process calibration or advanced device communication functions.
ADT 760S-LLP vs. ADT 760S-D and ADT 760S-MA
The ADT760S family covers three different pressure application areas:
| Model | Pressure Range | Pressure Type |
|---|---|---|
| ADT 760S-LLP | ±75 mbar | Gauge / Differential |
| ADT 760S-D | -0.86 to +2.5 bar | Gauge / Differential |
| ADT 760S-MA | -0.86 to +25 bar | Gauge / Absolute |
The ADT 760S-LLP provides the lowest pressure capability and is optimized for sensitive low-pressure and differential pressure applications.
The ADT 760S-D extends the range to 2.5 bar while retaining gauge and differential pressure capability.
The ADT 760S-MA extends the pressure range to 25 bar and is intended for gauge and absolute pressure applications.
Typical Calibration Applications
The Additel ADT 760S-LLP Low Pressure Calibrator is particularly suitable for calibration and testing of:
- Differential pressure transmitters
- Low-pressure transmitters
- Low-pressure sensors
- Differential pressure gauges
- HVAC pressure instrumentation
- Cleanroom pressure transmitters
- Filter monitoring instruments
- Airflow-related instrumentation
- Pneumatic low-pressure equipment
- Laboratory pressure instruments
Typical users include:
- Professional calibration laboratories
- HVAC service organizations
- Pharmaceutical industry
- Cleanroom operators
- Process industry
- Industrial maintenance departments
- Quality assurance departments
- Instrument manufacturers
- Field service technicians
Calibration and Service by europascal
At very low pressures, even small absolute deviations can become significant relative to the applied pressure.
Regular calibration of the internal pressure module is therefore particularly important for maintaining reliable metrological performance.
The europascal calibration service provides professional calibration solutions for low-pressure calibrators, differential pressure instruments, pressure modules, pressure sensors and pressure transmitters.
europascal can also support customers in selecting the appropriate ADT155 pressure module, pressure range, adapters and accessories.
Why Choose the Additel ADT 760S-LLP?
The Additel ADT 760S-LLP Precise Low Pressure Calibrator combines automatic pressure generation and control with interchangeable precision pressure modules in a compact handheld instrument.
Its maximum range of ±75 mbar, available ADT155 internal ranges down to ±0.62 mbar, pressure accuracy of 0.05 % FS and control stability of 0.005 % FS or 0.05 Pa, whichever is greater make it specifically suited to demanding low-pressure and differential pressure applications.
The simplified ADT760S architecture focuses on pressure generation and pressure measurement without the integrated electrical process-calibration and advanced communication functions of the ADT760A.
For calibration laboratories and technicians who already use separate electrical reference equipment, this provides an efficient and flexible solution for automated low-pressure calibration.
Looking for the Additel ADT 760S-LLP or an automatic solution for precise low and differential pressure calibration? Contact europascal for expert advice, suitable ADT155 module configurations, accessories and professional calibration services.
Further Additel ADT 760S information from europascal can be found here.
Further pressure calibration products from europascal can be found here.
