The europascal BH4-700B Automatic Deadweight Tester is a high-performance hydraulic pressure standard designed for precise and efficient calibration from 2 to 700 bar. With an accuracy of 0.01 %, the BH4-700B combines the proven physical measurement principle of a piston gauge with the advanced automatic functionality of the BH4 series.
The instrument is designed as a single-piston hydraulic deadweight tester and is identified by the manufacturer as BH4-700B SP. Its measuring range extends from 2 to 700 bar, corresponding to 200 to 70,000 kPa and approximately 30 to 10,000 psi.
The BH4-700B is particularly suitable for professional calibration laboratories, pressure instrument manufacturers, industrial quality assurance departments and service organizations that regularly calibrate pressure gauges, pressure sensors, transmitters and other hydraulic pressure measuring instruments.
Unlike a conventional manually operated pressure balance, the automatic BH4 platform integrates motorization, piston position visualization, pressure calculation and digital data functions. This reduces manual intervention and simplifies repetitive calibration procedures while retaining the fundamental physical measurement principle of a precision piston gauge.
europascal provides professional support for pressure calibration equipment, system configuration, maintenance and calibration. The europascal calibration service provides calibration solutions for deadweight testers, pressure balances, pressure gauges, pressure sensors, transmitters and other pressure measuring equipment.
Your Benefits at a Glance
The europascal BH4-700B Automatic Deadweight Tester combines high accuracy with a broad hydraulic pressure range and convenient automatic operation.
Key benefits include:
- Automatic hydraulic deadweight tester
- Measuring range from 2 to 700 bar
- Measuring range from 200 to 70,000 kPa
- Measuring range from 30 to 10,000 psi
- Maximum pressure of 700 bar / 70 MPa
- Accuracy of 0.01 %
- Single-piston configuration
- Physical piston gauge measurement principle
- Hydraulic operation with oil
- Motorized operation
- Dynamic piston position visualization
- Automatic calculation of generated pressure
- Automatic pressure display
- Different pressure units
- Calibration result recording
- Computer data transfer
- Designed for professional calibration laboratories
- Professional calibration and service from europascal
Measuring Range from 2 to 700 bar
The europascal BH4-700B covers a hydraulic pressure range from:
2 to 700 bar
This corresponds to:
200 to 70,000 kPa
or:
0.2 to 70 MPa
The manufacturer also specifies:
30 to 10,000 psi
The maximum pressure is therefore:
700 bar / 70 MPa
This broad pressure range makes the BH4-700B suitable for a wide variety of hydraulic pressure calibration applications.
The single-piston configuration covers the complete range without requiring the operator to switch between separate piston-cylinder systems.
Accuracy of 0.01 %
The europascal BH4-700B provides an accuracy of:
0.01 %
This high metrological performance makes the instrument suitable for demanding calibration tasks involving precision pressure measuring equipment.
The total measurement uncertainty of a calibration additionally depends on the relevant influence quantities of the pressure balance and complete measurement setup.
Important contributions can include:
- Calibration of the masses
- Effective piston area
- Pressure coefficient of the piston-cylinder system
- Local gravitational acceleration
- Air buoyancy
- Piston-cylinder temperature
- Pressure deformation
- Hydraulic fluid properties
- Hydrostatic head difference
- Repeatability
- Resolution of the device under test
- Environmental conditions
These quantities should be considered according to the applicable calibration procedure and measurement uncertainty model.
Fundamental Piston Gauge Measurement Principle
The europascal BH4-700B 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 calibration masses is primarily determined by:
F = m × g
where:
m = applied mass
g = gravitational acceleration
The simplified relationship is therefore:
p = (m × g) / A
For precision pressure calibration, the actual calculation can additionally consider corrections for factors such as local gravity, air buoyancy, piston-cylinder temperature, pressure deformation and hydrostatic head.
The BH4 platform combines this proven physical measurement principle with electronic calculation and automatic operator assistance.
Single-Piston Configuration
The europascal BH4-700B is identified by AREMECA as:
BH4-700B SP
The abbreviation SP represents the single-piston configuration.
The instrument therefore uses:
one precision piston-cylinder system
to cover the complete measuring range from 2 to 700 bar.
This single-piston design provides straightforward operation and avoids the need to switch between separate low-pressure and high-pressure piston systems.
For applications requiring an extended lower pressure range, a BH4-700B DP dual-piston configuration is also available.
Automatic BH4 Platform
The BH4 series is designed as the automatic version of the AREMECA high-performance deadweight tester concept.
The automatic system integrates functions for:
- Motorization
- Piston position visualization
- Pressure calculation
- Automatic pressure display
- Sensor integration
- Calibration data handling
- Computer data transfer
The actual reference pressure continues to be generated physically by the piston-cylinder system and calibrated masses.
The automation primarily assists the operator with controlling, monitoring, calculating and documenting the calibration process.
Motorized Operation
Rotation of the piston and mass system is an important part of deadweight tester operation.
Rotation helps minimize friction between the piston and cylinder and supports free movement of the piston.
The BH4 platform integrates motorization, reducing the need for the operator to rotate the mass system manually.
This is particularly useful for calibration laboratories performing repetitive calibration sequences with many measurement points.
Dynamic Piston Position Visualization
Correct piston position is essential for reliable operation of a pressure balance.
The BH4 system provides:
dynamic piston position visualization
The operator can monitor the piston position during calibration and determine whether the piston is operating within its appropriate working range.
This simplifies balancing and provides greater convenience than purely manual observation.
Automatic Pressure Calculation
The automatic BH4 platform assists with calculation of the pressure generated by the deadweight tester.
This reduces the need for manual calculations involving the applied masses, effective piston area and relevant correction quantities.
The system can support calculation based on parameters such as:
- Applied calibration masses
- Piston-cylinder characteristics
- Temperature
- Atmospheric pressure
- Relative humidity
- Gravitational acceleration
This helps provide consistent calculation procedures and reduces operator workload.
Automatic Pressure Display
The calculated pressure can be displayed directly to the operator.
This is particularly convenient during calibration because the reference value does not need to be calculated separately after every change in the applied mass load.
The automatic display supports faster comparison between the generated reference pressure and the indication of the device under test.
Different Pressure Units
The BH4 calculation functionality provides flexibility regarding pressure units.
Depending on the configuration, the generated pressure can be represented in units such as:
- bar
- kPa
- MPa
- psi
- kg/cm²
This is particularly useful for calibration laboratories working with instruments from different manufacturers, industries and countries.
Calibration Result Recording
The europascal BH4-700B supports recording of calibration results.
This functionality can simplify:
- Calibration documentation
- Measurement traceability
- Quality assurance
- Evaluation of devices under test
- Calibration history
- Digital laboratory workflows
Electronic recording also helps reduce manual transcription of measurement values.
Computer Data Transfer
Calibration information can be transferred to a computer.
This allows the BH4-700B to be incorporated into modern digital calibration workflows.
Computer communication can simplify subsequent evaluation, documentation and processing of measurement results.
For professional laboratories calibrating large numbers of pressure instruments, digital data transfer can significantly improve workflow efficiency.
Hydraulic Operation with Oil
The europascal BH4-700B is a hydraulic deadweight tester operating with:
oil
Hydraulic pressure transmission provides stable and efficient pressure generation throughout the measuring range.
Correct filling and venting of the hydraulic circuit are important because trapped gas can influence pressure generation and settling behavior.
Compatibility between the hydraulic medium, device under test and wetted components should always be verified before calibration.
Standard Gravity and Local Gravity
The force generated by calibration masses depends directly on gravitational acceleration.
The conventional standard value is:
g = 9.80665 m/s²
Actual gravitational acceleration varies according to geographical location.
For precision pressure calibration, the appropriate gravity value should therefore be considered.
The pressure balance can be configured for standard gravity or a customer-specific local gravity value according to the calibration requirements.
Technical Highlights
Model: europascal BH4-700B
Manufacturer reference: BH4-700B SP
Device type: Automatic Hydraulic Deadweight Tester
Product family: BH4 Automatic
Configuration: Single piston
Number of pistons: 1
Measuring range: 2 to 700 bar
Measuring range: 200 to 70,000 kPa
Measuring range: 0.2 to 70 MPa
Measuring range: 30 to 10,000 psi
Maximum pressure: 700 bar / 70 MPa
Accuracy: 0.01 %
Measurement principle: Piston gauge / deadweight tester
Pressure medium: Oil
Motorization: Integrated
Piston position visualization: Integrated
Pressure calculation: Automatic
Pressure display: Automatic
Result recording: Integrated
Computer data transfer: Available
Technical Data
| Feature | europascal BH4-700B |
|---|---|
| Manufacturer | europascal Aremeca |
| Model | BH4-700B |
| Manufacturer reference | BH4-700B SP |
| Device type | Automatic Hydraulic Deadweight Tester |
| Product family | BH4 Automatic |
| Configuration | Single piston |
| Number of pistons | 1 |
| Measuring range | 2–700 bar |
| Measuring range | 200–70,000 kPa |
| Measuring range | 0.2–70 MPa |
| Measuring range | 30–10,000 psi |
| Maximum pressure | 700 bar / 70 MPa |
| Accuracy | 0.01 % |
| Measurement principle | Piston gauge |
| Pressure medium | Oil |
| Motorized operation | Integrated |
| Piston position visualization | Integrated |
| Automatic pressure calculation | Integrated |
| Automatic pressure display | Integrated |
| Result recording | Integrated |
| Computer data transfer | Available |
BH4-700B SP vs. BH4-700B DP
The BH4-700B is available with different piston configurations.
The BH4-700B SP uses one piston-cylinder system.
The BH4-700B DP uses two piston-cylinder systems to provide an optimized low-pressure and high-pressure range.
| Feature | BH4-700B SP | BH4-700B DP |
|---|---|---|
| Number of pistons | 1 | 2 |
| Overall coverage | 2–700 bar | 1–700 bar |
| Low-pressure range | – | 1–60 bar |
| High-pressure range | 2–700 bar | 10–700 bar |
| Accuracy | 0.01 % | 0.01 % |
| Operation | Automatic | Automatic |
| Pressure medium | Oil | Oil |
The BH4-700B SP is particularly suitable when a minimum pressure of 2 bar is sufficient and the simplicity of a single piston-cylinder system is preferred.
The BH4-700B DP extends the pressure capability down to 1 bar and uses two optimized piston-cylinder systems.
BH4 Automatic Deadweight Tester Series
The BH4 family includes several automatic hydraulic pressure balances for different pressure ranges.
| Model | Measuring Range | Accuracy |
|---|---|---|
| BH4-300B SP | 1–300 bar | 0.01 % |
| BH4-400B SP | 2–400 bar | 0.01 % |
| BH4-600B SP | 2–600 bar | 0.01 % |
| BH4-700B SP | 2–700 bar | 0.01 % |
| BH4-1200B SP | 2–1,200 bar | 0.01 % |
| BH4-2000B | 40–2,000 bar | 0.02 % |
| BH4-3000B | 40–3,000 bar | 0.02 % |
| BH4-4000B | 40–4,000 bar | 0.02 % |
| BH4-5000B | 40–5,000 bar | 0.02 % |
| BH4-6000B | 200–6,000 bar | 0.05 % |
| BH4-7000B | 200–7,000 bar | 0.05 % |
The BH4-700B provides an attractive combination of 700 bar maximum pressure and 0.01 % accuracy.
For applications requiring higher maximum pressure, the BH4-1200B extends the 0.01 % range up to 1,200 bar.
Typical Calibration Applications
The europascal BH4-700B Automatic Deadweight Tester is particularly suitable for calibration of:
- Precision pressure gauges
- Digital pressure gauges
- Pressure sensors
- Pressure transducers
- Pressure transmitters
- Hydraulic pressure indicators
- Reference pressure instruments
- Industrial hydraulic measuring systems
- High-pressure test equipment
Typical users include professional calibration laboratories, pressure instrument manufacturers, industrial quality assurance departments, research laboratories and calibration service organizations.
Calibration and Traceability
Regular calibration of a pressure balance is essential for maintaining reliable metrological performance.
Important components and parameters include:
- Piston-cylinder assembly
- Calibration mass set
- Effective piston area
- Pressure coefficient
- Temperature behavior
- Environmental parameters
- Relevant correction quantities
The europascal calibration service provides professional calibration solutions for deadweight testers, pressure balances, pressure gauges, sensors, transmitters and other pressure measuring equipment.
europascal can also provide support with system configuration, maintenance and selection of appropriate pressure calibration equipment.
Why Choose the europascal BH4-700B?
The europascal BH4-700B Precise Automatic Deadweight Tester combines a broad hydraulic measuring range from 2 to 700 bar with an accuracy of 0.01 % and the advanced automatic functionality of the BH4 platform.
The instrument retains the physical measurement principle of a precision piston gauge while adding motorized operation, dynamic piston position visualization, automatic pressure calculation and display, calibration result recording and computer data transfer.
This combination reduces operator workload and simplifies repetitive calibration procedures while maintaining the advantages of a physical pressure standard.
For professional laboratories that regularly calibrate hydraulic pressure sensors, transmitters, transducers and pressure gauges up to 700 bar, the BH4-700B provides an excellent combination of accuracy, range and automation.
Looking for the europascal BH4-700B or an automatic hydraulic pressure calibration solution up to 700 bar? Contact europascal for expert advice, system configuration and professional calibration services tailored to your requirements.
