The europascal BH4-30B Automatic Deadweight Tester is a precision hydraulic pressure standard designed for accurate and efficient calibration up to 30 bar. As part of the automatic BH4 series, it combines the proven physical measurement principle of a piston gauge with modern functions for motorized operation, dynamic piston position visualization, automatic pressure calculation and digital calibration workflows.
The BH4-30B is specifically designed for the lower hydraulic pressure range. This makes it particularly suitable for professional calibration laboratories that regularly calibrate pressure gauges, digital pressure gauges, sensors, transducers, transmitters and other instruments with relatively low hydraulic pressure ranges.
The reference pressure is generated physically by calibrated masses acting on a precision piston-cylinder system. This provides a direct relationship between force, effective piston area and pressure.
Unlike a conventional manually operated deadweight tester, the BH4 platform assists the operator during the calibration process. Motorized mass rotation supports free piston movement, while the integrated system provides dynamic visualization of the piston position and calculates the generated reference pressure.
The result is a modern pressure standard combining the fundamental metrological advantages of a deadweight tester with convenient automated operation.
europascal provides professional support for pressure calibration equipment, system configuration, maintenance and calibration. The europascal calibration service provides professional calibration solutions for pressure balances, deadweight testers, pressure gauges, sensors, transmitters and other pressure measuring equipment.
Your Benefits at a Glance
The europascal BH4-30B Automatic Deadweight Tester combines precision hydraulic pressure generation with automatic operation.
Key benefits include:
- Automatic hydraulic deadweight tester
- Pressure range up to 30 bar
- Optimized for lower hydraulic pressures
- Precision piston-cylinder measurement principle
- Physical pressure generation using calibrated masses
- Hydraulic operation with oil
- Automatic BH4 platform
- Motorized mass rotation
- Dynamic piston position visualization
- Automatic pressure calculation
- Automatic pressure display
- Different pressure units
- Environmental measurement support
- Calibration result recording
- Computer data transfer
- Reduced operator workload
- Designed for professional calibration laboratories
Hydraulic Pressure Calibration up to 30 bar
The europascal BH4-30B is designed specifically for precision calibration in the lower hydraulic pressure range.
Its maximum pressure is:
30 bar
This corresponds to:
3 MPa
or:
3,000 kPa
A pressure balance optimized for this range is particularly useful when calibration points at relatively low pressures must be generated accurately.
Typical applications include calibration of instruments with full-scale values such as 1 bar, 2.5 bar, 4 bar, 6 bar, 10 bar, 16 bar, 25 bar and 30 bar.
Physical Piston Gauge Measurement Principle
The europascal BH4-30B Automatic Deadweight Tester operates according to the fundamental physical principle of a piston gauge.
The basic relationship is:
p = F / A
where:
p = generated pressure
F = force acting on the piston
A = effective piston area
The gravitational force generated by the calibrated masses is primarily determined by:
F = m × g
where:
m = applied mass
g = gravitational acceleration
The simplified pressure relationship is therefore:
p = (m × g) / A
This physical relationship between mass, gravitational acceleration and effective piston area forms the basis of deadweight tester pressure generation.
For precision calibration, additional corrections can be considered according to the calibration procedure and required measurement uncertainty.
Measurement Uncertainty Contributions
The complete measurement uncertainty of a calibration does not depend only on the pressure balance.
Relevant influence quantities can include:
- Calibration uncertainty of the masses
- Effective piston area
- Pressure coefficient of the piston-cylinder system
- Local gravitational acceleration
- Air buoyancy
- Piston-cylinder temperature
- Hydraulic fluid density
- Hydrostatic head difference
- Repeatability
- Sensitivity
- Pressure stability
- Resolution of the device under test
- Environmental conditions
These contributions should be evaluated according to the required calibration uncertainty and applicable quality system.
Optimized for Lower Hydraulic Pressures
A major advantage of the europascal BH4-30B is its specialization in the lower hydraulic pressure range.
The effective piston area and calibration mass system are selected so that useful pressure increments can be generated without requiring extremely small masses.
This provides practical advantages when calibrating instruments with relatively low full-scale pressures.
For laboratories performing many calibrations below 30 bar, a dedicated pressure balance can provide more convenient operation than using a piston-cylinder system primarily optimized for several hundred bar.
Automatic BH4 Platform
The BH4 series combines a physical pressure reference with automatic operator assistance.
The automatic platform provides functions such as:
- Motorized operation
- Dynamic piston position visualization
- Automatic pressure calculation
- Automatic pressure display
- Different pressure units
- Environmental data support
- Recording of calibration results
- Computer data transfer
The pressure itself continues to be generated physically by calibrated masses acting on the precision piston-cylinder system.
The automatic functions primarily simplify operation, monitoring, calculation and documentation.
Motorized Mass Rotation
Free rotation of the piston helps minimize friction effects between the piston and cylinder.
The BH4 platform provides:
motorized mass rotation
This reduces the need for continuous manual rotation of the mass system.
Motorized operation is particularly useful during repetitive calibration sequences containing many measurement points.
The function reduces operator workload while supporting consistent operation of the precision piston-cylinder assembly.
Dynamic Piston Position Visualization
Correct piston position is essential for reliable deadweight tester operation.
The BH4 system therefore provides:
dynamic piston position visualization
The operator can monitor the piston during calibration and determine whether it is operating within the correct working position.
This provides greater convenience compared with a conventional pressure balance requiring purely manual piston observation.
Automatic Pressure Calculation
The BH4 platform assists with calculation of the generated reference pressure.
Relevant parameters can include:
- Applied calibration masses
- Effective piston area
- Gravitational acceleration
- Temperature
- Atmospheric pressure
- Relevant correction quantities
The calculated reference pressure can then be displayed directly to the operator.
This reduces manual calculation effort and helps provide consistent calibration procedures.
Different Pressure Units
The integrated calculation system supports different pressure units.
Depending on configuration, these can include:
- bar
- kPa
- MPa
- psi
- kg/cm²
This provides additional flexibility when calibrating instruments from different manufacturers or for customers using different engineering units.
Environmental Influence Quantities
Environmental conditions can influence precision pressure calibration.
Relevant quantities include:
- Ambient temperature
- Atmospheric pressure
- Relative humidity
Temperature can influence the effective piston area, while atmospheric pressure and humidity can be relevant when correcting for air buoyancy acting on the calibration masses.
The BH4 platform supports the consideration of these quantities during calculation of the generated reference pressure.
Calibration Result Recording
The europascal BH4-30B supports digital calibration workflows and recording of calibration results.
This can simplify:
- Calibration documentation
- Measurement traceability
- Quality assurance
- Calibration history
- Evaluation of the device under test
- Digital laboratory workflows
Digital recording also helps reduce errors associated with manually transferring measurement results.
Computer Data Transfer
Calibration data can be transferred to a computer for further processing.
This makes the BH4-30B suitable for integration into modern calibration laboratory workflows.
For laboratories processing many devices or measurement points, computer data transfer can significantly reduce manual documentation effort.
Hydraulic Operation with Oil
The europascal BH4-30B is a hydraulic pressure balance operating with:
oil
Hydraulic operation provides efficient pressure transmission between the pressure generator, piston-cylinder system and device under test.
Correct filling and venting are important for reliable pressure generation.
Trapped gas can influence pressure stability and settling behavior, while contamination can affect the performance of precision hydraulic components.
Compatibility between the hydraulic medium and the connected device under test should therefore always be verified.
Calibration Masses
Calibrated masses generate the precisely defined force acting on the piston.
The mass set is therefore an essential component of the physical pressure standard.
Together with the effective piston area and gravitational acceleration, the calibrated mass values determine the generated reference pressure.
Different mass set configurations can be selected according to the required pressure unit and gravity value.
Standard and Local Gravity
The force generated by the calibration masses depends directly on gravitational acceleration.
The conventional standard value is:
g = 9.80665 m/s²
Actual gravitational acceleration varies geographically.
For precision pressure calibration, the appropriate local gravity value should therefore be considered.
The pressure balance can be configured for standard gravity or a specified customer-specific local gravity value.
Installation and Leveling
Correct leveling is important for piston gauge operation.
The instrument should be installed on a stable work surface and accurately leveled before calibration.
Proper leveling supports free vertical movement of the piston and helps minimize unwanted lateral forces within the piston-cylinder assembly.
A stable laboratory environment is also recommended for achieving the best calibration performance.
Technical Highlights
Model: europascal BH4-30B
Device type: Automatic Hydraulic Deadweight Tester
Product family: BH4 Automatic
Maximum pressure: 30 bar
Maximum pressure: 3 MPa
Maximum pressure: 3,000 kPa
Measurement principle: Piston gauge / deadweight tester
Pressure medium: Oil
Pressure generation: Calibrated masses and precision piston-cylinder system
Motorized operation: Integrated
Piston position visualization: Dynamic
Automatic pressure calculation: Integrated
Automatic pressure display: Integrated
Different pressure units: Available
Calibration result recording: Integrated
Computer data transfer: Available
Standard gravity: 9.80665 m/s²
Local gravity configuration: Available
Technical Data
| Feature | europascal BH4-30B |
|---|---|
| Manufacturer | europascal Aremeca |
| Model | BH4-30B |
| Device type | Automatic Hydraulic Deadweight Tester |
| Product family | BH4 Automatic |
| Maximum pressure | 30 bar |
| Maximum pressure | 3 MPa |
| Maximum pressure | 3,000 kPa |
| Measurement principle | Piston gauge |
| Pressure medium | Oil |
| Pressure generation | Calibrated masses |
| Motorized operation | Integrated |
| Piston position visualization | Dynamic |
| Automatic pressure calculation | Integrated |
| Automatic pressure display | Integrated |
| Result recording | Integrated |
| Computer data transfer | Available |
| Standard gravity | 9.80665 m/s² |
| Local gravity | Available |
Why Use a Dedicated 30 bar Pressure Balance?
Using a piston-cylinder system optimized for the required pressure range can provide significant practical advantages.
The europascal BH4-30B is particularly useful for calibration of instruments with measuring ranges such as:
- 1 bar
- 2.5 bar
- 4 bar
- 6 bar
- 10 bar
- 16 bar
- 25 bar
- 30 bar
This covers many common industrial and laboratory pressure measuring instruments.
For calibration laboratories where these ranges occur frequently, a dedicated 30 bar pressure balance can provide convenient mass increments and efficient calibration workflows.
BH4 Automatic Platform vs. Conventional Manual Deadweight Tester
The BH4-30B retains the physical measurement principle of a traditional deadweight tester while adding automatic functions.
| Function | Conventional Manual Tester | BH4-30B |
|---|---|---|
| Physical piston gauge principle | Yes | Yes |
| Calibrated masses | Yes | Yes |
| Piston rotation | Manual | Motorized |
| Piston position monitoring | Manual | Dynamic visualization |
| Pressure calculation | Manual/external | Automatic |
| Pressure display | Manual/external | Integrated |
| Result recording | Usually manual | Digital support |
| PC data transfer | Usually external | Available |
The BH4 platform therefore provides the physical traceability of a piston gauge while simplifying routine operation.
Typical Calibration Applications
The europascal BH4-30B Automatic Deadweight Tester is suitable for testing, adjustment and calibration of mechanical and electronic pressure measuring instruments.
Typical devices under test include:
- Precision pressure gauges
- Digital pressure gauges
- Pressure sensors
- Pressure transducers
- Pressure transmitters
- Pressure switches
- Hydraulic pressure indicators
- Reference pressure instruments
- Industrial pressure measuring systems
Typical users include professional calibration laboratories, pressure instrument manufacturers, quality assurance departments, research laboratories, maintenance departments and calibration service organizations.
Calibration and Traceability
Regular calibration of a precision pressure balance is important for maintaining reliable metrological performance.
Important components and parameters include:
- Piston-cylinder assembly
- Effective piston area
- Calibration mass set
- Pressure coefficient
- Temperature behavior
- Gravity value
- Repeatability
- Relevant correction quantities
The europascal calibration service provides professional calibration solutions for pressure balances, deadweight testers, pressure gauges, pressure sensors, transmitters and other pressure measuring equipment.
europascal can also provide support with maintenance, system configuration and selection of suitable pressure calibration equipment.
Why Choose the europascal BH4-30B?
The europascal BH4-30B Precise Automatic Deadweight Tester combines the physical measurement principle of a piston gauge with the automatic functionality of the BH4 platform.
Its specialization for hydraulic pressures up to 30 bar makes it particularly suitable for laboratories that regularly calibrate low-pressure hydraulic instruments.
Motorized operation, dynamic piston position visualization, automatic pressure calculation, digital result recording and computer data transfer reduce operator workload and simplify repetitive calibration procedures.
The reference pressure continues to be generated by calibrated masses acting on a precision piston-cylinder system, combining physical traceability with a modern calibration workflow.
Looking for the europascal BH4-30B or an automatic hydraulic pressure calibration solution up to 30 bar? Contact europascal for expert advice, system configuration and professional calibration services tailored to your requirements.
