The europascal BH4-600B DP Dual Piston Deadweight Tester is an automatic hydraulic pressure standard designed for precise calibration across a particularly wide pressure range. Its dual-piston configuration combines two optimized piston-cylinder systems in one instrument: a low-pressure range from 1 to 60 bar and a high-pressure range from 10 to 600 bar.
Together, the two piston systems provide overall pressure coverage from 1 to 600 bar with an accuracy of 0.01 %. The overlapping range from 10 to 60 bar provides additional flexibility when selecting the appropriate piston-cylinder system for a calibration point.
A major advantage of the BH4-600B DP concept is that both piston systems can be operated with a common calibration weight set. This provides broad pressure coverage without requiring two completely independent pressure balances.
The BH4-600B DP combines the proven physical measurement principle of a piston gauge with the automatic functionality of the BH4 platform. Integrated motorized operation, dynamic piston position visualization, automatic pressure calculation and display, calibration result recording and computer data transfer simplify repetitive calibration procedures.
europascal provides professional support for pressure calibration equipment, system configuration, maintenance and calibration. The europascal calibration service provides professional solutions for deadweight testers, pressure balances, pressure gauges, pressure sensors, transmitters and other pressure measuring equipment.
Your Benefits at a Glance
The europascal BH4-600B DP Dual Piston Deadweight Tester combines two optimized piston-cylinder systems with the automatic functionality of the BH4 series.
Key benefits include:
- Automatic hydraulic deadweight tester
- Dual-piston configuration
- Two precision piston-cylinder systems
- Low-pressure range from 1 to 60 bar
- High-pressure range from 10 to 600 bar
- Overall pressure coverage from 1 to 600 bar
- Overlapping range from 10 to 60 bar
- Accuracy of 0.01 %
- One common calibration weight set for both pressure ranges
- Physical piston gauge measurement principle
- Hydraulic operation with oil
- Integrated motorized operation
- Dynamic piston position visualization
- Automatic pressure calculation
- Automatic pressure display
- Different pressure units
- Calibration result recording
- Computer data transfer
- Reduced operator workload
- Designed for professional calibration laboratories
Dual Pressure Ranges from 1 to 600 bar
The main advantage of the europascal BH4-600B DP is its dual-piston configuration.
The first piston-cylinder system covers the low-pressure range:
1 to 60 bar
The second piston-cylinder system covers the high-pressure range:
10 to 600 bar
This results in overall pressure coverage from:
1 to 600 bar
The two systems overlap between:
10 and 60 bar
This overlap provides flexibility when selecting the piston system for calibration points within this pressure range.
The maximum pressure is:
600 bar / 60 MPa
Two Pistons – One Common Weight Set
The designation DP represents the dual-piston configuration.
The europascal BH4-600B DP therefore incorporates:
two precision piston-cylinder systems
A particularly useful feature of the system is that both measuring ranges can be generated with:
one common calibration weight set
The two pistons have different effective areas. Consequently, the same gravitational force generated by the calibration masses produces different pressures depending on which piston is used.
This allows a wide overall pressure range while retaining practical mass increments at both low and high pressures.
Accuracy of 0.01 %
The europascal BH4-600B DP provides a specified accuracy of:
0.01 %
This makes the instrument suitable for demanding hydraulic pressure calibration applications.
The complete measurement uncertainty of an actual calibration additionally depends on the individual influence quantities of the pressure balance and calibration setup.
Relevant contributions can include:
- Calibration of the mass set
- Effective area of the selected piston
- Pressure coefficient
- 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
Because the BH4-600B DP uses two piston-cylinder systems, the correct calibration parameters for the selected piston must be used when calculating the generated pressure.
Fundamental Piston Gauge Measurement Principle
The europascal BH4-600B DP Dual Piston Deadweight Tester operates according to the physical piston gauge principle.
The fundamental 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 pressure relationship is therefore:
p = (m × g) / A
The dual-piston concept uses two different effective piston areas.
A larger effective area is advantageous for generating lower pressures, while a smaller effective area allows substantially higher pressures to be generated with the same mass force.
For precision calibration, additional corrections can be considered for local gravity, air buoyancy, piston-cylinder temperature, pressure deformation and hydrostatic head.
Low-Pressure Piston from 1 to 60 bar
The first piston-cylinder system is optimized for lower pressures and covers:
1 to 60 bar
The larger effective piston area allows practical calibration mass increments to be used at relatively low hydraulic pressures.
This dedicated low-pressure piston is a major advantage compared with the BH4-600B SP single-piston version, which starts at 2 bar.
The DP configuration therefore extends the overall lower pressure limit to:
1 bar
High-Pressure Piston from 10 to 600 bar
The second piston-cylinder system is optimized for the higher pressure range:
10 to 600 bar
The smaller effective piston area allows higher pressures to be generated using the common mass set.
The maximum pressure is:
600 bar
or:
60 MPa
This combination provides a particularly broad pressure range within one automatic pressure balance.
Overlapping Range from 10 to 60 bar
The two piston systems overlap between:
10 and 60 bar
Within this range, pressure points can be generated using either piston system, depending on the calibration procedure and configuration.
This overlap ensures continuity between the low-pressure and high-pressure ranges and provides additional flexibility for professional calibration laboratories.
Automatic BH4 Platform
The BH4 series combines the physical measurement principle of a deadweight tester with automatic operator assistance.
The platform integrates functions for:
- Motorized operation
- Dynamic piston position visualization
- Automatic pressure calculation
- Automatic pressure display
- Different pressure units
- Calibration result recording
- Computer data transfer
The reference pressure itself continues to be generated physically by calibrated masses acting on the selected piston-cylinder system.
The automation primarily simplifies operation, calculation and documentation.
Integrated Motorized Operation
Free rotation of the piston helps reduce friction effects between the piston and cylinder.
The europascal BH4-600B DP provides integrated motorized operation, reducing the need for manual rotation of the piston and mass system.
This is particularly useful for repetitive calibration procedures involving many measurement points.
The automatic functionality helps provide consistent operating conditions while reducing operator workload.
Dynamic Piston Position Visualization
Correct piston position is essential for reliable deadweight tester operation.
The BH4 platform therefore provides:
dynamic piston position visualization
The operator can monitor the position of the active piston during calibration and determine whether it is operating within the appropriate working range.
This simplifies balancing and provides greater convenience compared with purely manual piston position observation.
Automatic Pressure Calculation and Display
The BH4 platform assists with calculating the reference pressure generated by the selected piston and applied calibration masses.
This is particularly useful for a dual-piston pressure balance because the calculation must use the correct effective area and calibration parameters for the active piston-cylinder system.
The system can consider relevant parameters such as:
- Selected piston-cylinder system
- Applied calibration masses
- Effective piston area
- Gravitational acceleration
- Environmental parameters
- Relevant correction quantities
The resulting reference pressure can then be displayed directly to the operator.
Different Pressure Units
The automatic calculation system allows the generated pressure to be displayed in different units.
Depending on the configuration, these can include:
- bar
- kPa
- MPa
- psi
- kg/cm²
This provides flexibility for calibration laboratories working with pressure instruments from different industries and countries.
Recording of Calibration Results
The europascal BH4-600B DP supports recording of calibration results.
This can simplify:
- Calibration documentation
- Measurement traceability
- Quality assurance
- Evaluation of devices under test
- Calibration history
- Digital laboratory workflows
Electronic data handling can also reduce the risk of transcription errors associated with manual recording.
Computer Data Transfer
Calibration data can be transferred to a computer.
This allows the BH4-600B DP to be incorporated into modern digital calibration workflows.
For laboratories calibrating many devices or measurement points, computer data transfer can reduce manual documentation work and simplify subsequent processing of calibration results.
Hydraulic Operation with Oil
The europascal BH4-600B DP is a hydraulic pressure balance operating with:
oil
Hydraulic operation provides efficient pressure transmission throughout the complete 1 to 600 bar pressure range.
Correct filling and venting of the hydraulic circuit are important because trapped gas can affect pressure generation and settling behavior.
Compatibility between the pressure medium, device under test and wetted components should always be verified.
Standard Gravity and Local Gravity
The force generated by calibration masses depends on gravitational acceleration.
The conventional standard value is:
g = 9.80665 m/s²
Actual gravitational acceleration varies according to geographical location.
For precision calibration, an appropriate local gravity value can therefore be relevant.
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 BH4-600B DP
Device type: Automatic Dual Piston Hydraulic Deadweight Tester
Product family: BH4 Automatic
Configuration: Dual piston
Number of pistons: 2
Low-pressure range: 1 to 60 bar
High-pressure range: 10 to 600 bar
Overall pressure coverage: 1 to 600 bar
Overlapping range: 10 to 60 bar
Maximum pressure: 600 bar / 60 MPa
Accuracy: 0.01 %
Measurement principle: Piston gauge / deadweight tester
Pressure medium: Oil
Weight concept: One common weight set for both piston systems
Motorization: Integrated
Piston position visualization: Dynamic
Pressure calculation: Automatic
Pressure display: Automatic
Result recording: Integrated
Computer data transfer: Available
Technical Data
| Feature | europascal BH4-600B DP |
|---|---|
| Manufacturer | europascal Aremeca |
| Model | BH4-600B DP |
| Device type | Automatic Dual Piston Deadweight Tester |
| Product family | BH4 Automatic |
| Configuration | Dual piston |
| Number of pistons | 2 |
| Low-pressure range | 1–60 bar |
| High-pressure range | 10–600 bar |
| Overall pressure coverage | 1–600 bar |
| Overlapping range | 10–60 bar |
| Maximum pressure | 600 bar / 60 MPa |
| Accuracy | 0.01 % |
| Measurement principle | Piston gauge |
| Pressure medium | Oil |
| Weight sets | One common set for both ranges |
| Motorized operation | Integrated |
| Piston position visualization | Dynamic |
| Automatic pressure calculation | Integrated |
| Automatic pressure display | Integrated |
| Result recording | Integrated |
| Computer data transfer | Available |
BH4-600B DP vs. BH4-600B SP
The main difference between the BH4-600B DP and BH4-600B SP is the piston configuration.
| Feature | BH4-600B DP | BH4-600B SP |
|---|---|---|
| Piston configuration | Dual piston | Single piston |
| Number of pistons | 2 | 1 |
| Overall coverage | 1–600 bar | 2–600 bar |
| Low-pressure piston | 1–60 bar | – |
| High-pressure range | 10–600 bar | 2–600 bar |
| Range overlap | 10–60 bar | – |
| Accuracy | 0.01 % | 0.01 % |
| Operation | Automatic | Automatic |
| Pressure medium | Oil | Oil |
The BH4-600B DP is particularly attractive when calibration close to the lower end of the pressure range is important.
Its dedicated low-pressure piston extends the minimum pressure to 1 bar, while the second piston provides calibration up to 600 bar.
The BH4-600B SP provides the simpler alternative when a minimum pressure of 2 bar is sufficient and a single piston-cylinder system is preferred.
Position within the BH4 Dual Piston Series
The BH4 family includes several dual-piston configurations for different maximum pressures.
| Model | Piston Ranges | Accuracy |
|---|---|---|
| BH4-300B DP | 1–60 + 5–300 bar | 0.01 % |
| BH4-400B DP | 1–60 + 5–400 bar | 0.01 % |
| BH4-600B DP | 1–60 + 10–600 bar | 0.01 % |
| BH4-700B DP | 1–60 + 10–700 bar | 0.01 % |
| BH4-1200B DP | 1–60 + 20–1,200 bar | 0.01 % |
The BH4-600B DP therefore provides a broad overall range from 1 to 600 bar while retaining an accuracy of 0.01 %.
Typical Calibration Applications
The europascal BH4-600B DP Dual Piston 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 measurement systems
- Pressure calibration equipment
The wide overall pressure range makes the instrument especially useful for laboratories that calibrate pressure instruments with many different ranges.
Calibration and Traceability
Regular calibration of a dual-piston pressure balance is important for maintaining reliable metrological performance.
Relevant components and parameters include:
- Low-pressure piston-cylinder assembly
- High-pressure piston-cylinder assembly
- Calibration mass set
- Effective area of each piston
- Pressure coefficients
- Temperature behavior
- Gravity value
- 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 suitable pressure calibration equipment.
Why Choose the europascal BH4-600B DP?
The europascal BH4-600B DP Precise Dual Piston Deadweight Tester combines two optimized piston-cylinder systems with the automatic functionality of the BH4 platform.
The low-pressure piston covers 1 to 60 bar, while the high-pressure piston covers 10 to 600 bar. Together, they provide overall pressure coverage from 1 to 600 bar with an accuracy of 0.01 %.
Both piston systems use a common calibration weight set, providing excellent flexibility without requiring two completely independent pressure standards.
Integrated motorized operation, dynamic piston position visualization, automatic pressure calculation and display, result recording and computer data transfer reduce operator workload and simplify repetitive calibration procedures.
For professional calibration laboratories requiring precise automatic hydraulic pressure calibration over a wide range, the BH4-600B DP provides an excellent combination of range, accuracy and automation.
Looking for the europascal BH4-600B DP or an automatic dual-piston hydraulic calibration solution from 1 to 600 bar? Contact europascal for expert advice, system configuration and professional calibration services tailored to your requirements.
