The europascal BH2-700B Hydraulic Deadweight Tester is a high-performance pressure standard designed for precise hydraulic calibration applications from 2 to 700 bar. With a standard accuracy of 0.01 % of reading and enhanced performance up to 0.006 % on request, the BH2-700B provides a reliable physical pressure reference for professional calibration laboratories, pressure instrument manufacturers, service organizations and industrial quality assurance departments.
The single-piston BH2-700B covers a measuring range from 2 to 700 bar, corresponding to 0.2 to 70 MPa, 200 to 70,000 kPa and 30 to 10,000 psi according to the manufacturer.
The instrument uses a single precision piston-cylinder system with a typical piston area of 3.92450 mm². The piston is manufactured from tungsten carbide, while the cylinder is made from treated steel. This combination provides the mechanical stability and wear resistance required for accurate hydraulic pressure generation.
The BH2-700B uses the CH2-1250B pressure generator and operates with H40 oil with a specified density of approximately 860 kg/m³.
The reference pressure is generated by calibrated masses acting on the precision piston-cylinder assembly. This direct physical measurement principle makes the BH2-700B an excellent reference instrument for calibration of pressure gauges, transmitters, sensors, switches and other hydraulic pressure measuring devices.
The europascal calibration service provides professional calibration solutions for deadweight testers, pressure balances, pressure gauges, pressure sensors, pressure transmitters and other pressure measuring equipment.
Your Benefits at a Glance
The europascal BH2-700B Hydraulic Deadweight Tester provides:
- Hydraulic deadweight tester for professional calibration
- Measuring range from 2 to 700 bar
- Measuring range from 0.2 to 70 MPa
- Measuring range from 200 to 70,000 kPa
- Manufacturer range from 30 to 10,000 psi
- Standard accuracy of 0.01 % of reading
- Enhanced accuracy up to 0.006 % on request
- Single-piston configuration
- One precision piston-cylinder system
- Typical piston area of 3.92450 mm²
- Tungsten carbide piston
- Treated steel cylinder
- CH2-1250B pressure generator
- H40 oil as pressure medium
- Fluid density approximately 860 kg/m³
- Instrument weight approximately 22 kg without masses
- Stainless steel calibration masses
- Standard or customer-specific gravity
- Optional motorized mass rotation
- Optional piston position visualization
- Optional automatic pressure calculation
- Optional computer data transfer
Measuring Range from 2 to 700 bar
The europascal BH2-700B covers a hydraulic pressure range from:
2 to 700 bar
This corresponds to:
0.2 to 70 MPa
and:
200 to 70,000 kPa
The manufacturer specifies the imperial range as:
30 to 10,000 psi
The maximum pressure is therefore:
700 bar / 70 MPa
This broad measuring range allows the BH2-700B to cover many common industrial and laboratory hydraulic calibration applications with a single piston-cylinder system.
Accuracy of 0.01 % of Reading
The standard accuracy of the europascal BH2-700B is:
0.01 % of reading
For applications with particularly demanding metrological requirements, enhanced performance is available:
up to 0.006 % on request
This makes the BH2-700B suitable not only for routine calibration work but also for applications requiring a high-performance reference pressure standard.
The actual measurement uncertainty achieved during calibration additionally depends on the individual calibration certificate, environmental conditions, operating procedure and characteristics of the device under test.
Physical Piston Gauge Measurement Principle
The europascal BH2-700B Hydraulic 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 force generated by the calibrated masses is primarily determined by:
F = m × g
where:
m = applied mass
g = gravitational acceleration
The simplified pressure equation is therefore:
p = (m × g) / A
This direct relationship between mass, gravitational acceleration and effective piston area forms the physical basis of deadweight tester pressure generation.
For precision calibration, additional correction quantities are considered according to the individual calibration data and operating conditions.
Single-Piston Configuration
The europascal BH2-700B described here is the:
BH2-700B SP – Single Piston
configuration.
It incorporates:
1 precision piston-cylinder system
and covers the complete specified measuring range from 2 to 700 bar.
This differentiates the BH2-700B SP from the available BH2-700B DP Dual Piston version.
The single-piston configuration provides straightforward operation without requiring the operator to switch between separate low-pressure and high-pressure piston-cylinder systems.
Typical Piston Area of 3.92450 mm²
AREMECA specifies a typical piston area for the BH2-700B SP of:
3.92450 mm²
The piston area is a fundamental metrological parameter because the generated pressure is directly related to the force acting on the piston and its effective area.
According to:
p = F / A
the same applied force produces a higher pressure as the effective piston area becomes smaller.
For precise pressure calculation, the individually calibrated effective piston area from the calibration certificate should be used.
Tungsten Carbide Piston
The piston of the BH2-700B SP is manufactured from:
tungsten carbide
Tungsten carbide provides:
- High hardness
- Excellent wear resistance
- Good dimensional stability
- Suitability for precision piston gauge applications
These characteristics are particularly important because the piston is one of the central metrological components of the deadweight tester.
Treated Steel Cylinder
The cylinder of the BH2-700B is manufactured from:
treated steel
The combination of a tungsten carbide piston and treated steel cylinder provides the mechanical characteristics required for reliable operation over the complete hydraulic pressure range.
The piston-cylinder assembly is a precision component and should therefore be protected from contamination and mechanical damage.
H40 Oil as Pressure Medium
The europascal BH2-700B operates with:
H40 oil
AREMECA specifies a fluid density of approximately:
860 kg/m³
The hydraulic medium transfers the pressure generated by the pressure generator to both the piston-cylinder system and the device under test.
Correct filling and venting are important because trapped gas can influence:
- Pressure stability
- Settling time
- Pressure generation
- Repeatability
Compatibility between the pressure medium and the connected device under test should always be verified.
CH2-1250B Pressure Generator
The BH2-700B uses the:
CH2-1250B pressure generator
The pressure generator allows the operator to build the hydraulic pressure required to raise the piston and balance the applied calibration masses.
The capstan is used to generate and finely adjust pressure until the piston reaches its correct equilibrium position.
This mechanical design provides a robust and reliable method of pressure generation without requiring an external automatic pressure controller.
Calibration Masses as the Force Reference
The force acting on the piston is generated using calibrated masses.
The BH2 series uses:
stainless steel calibration masses
The mass values, together with gravitational acceleration and the effective piston area, determine the generated reference pressure.
The principal mass set can be selected for different pressure units according to the calibration application.
These can include:
- bar
- psi
- kPa
- Other available engineering units
Additional or intermediate mass sets are available when multiple units are required.
Standard or Local Gravity
The gravitational force generated by the calibration masses depends on local gravitational acceleration.
The conventional standard value is:
g = 9.80665 m/s²
Actual gravity varies depending on geographical location.
The BH2-700B can therefore be configured for:
standard gravity
or:
a specified local gravity value
This configuration is available without changing the fundamental measuring principle.
For high-accuracy calibration, the correct gravity value is important because a relative deviation in gravity directly influences the force generated by the calibration masses.
Measurement Uncertainty Contributions
The complete measurement uncertainty of a calibration is influenced by more than the stated accuracy specification of the BH2-700B.
Relevant uncertainty contributions can include:
- Calibration uncertainty of the masses
- Effective piston area
- Pressure coefficient
- Piston-cylinder temperature
- Local gravitational acceleration
- Air buoyancy
- Thermal expansion
- Hydraulic fluid properties
- Hydrostatic head difference
- Repeatability
- Sensitivity
- Pressure stability
- Resolution of the device under test
- Environmental conditions
The final measurement uncertainty should therefore be determined using the actual calibration certificate and the conditions of the individual calibration.
Operating Temperature
AREMECA specifies an operating temperature range of:
18 to 28 °C
The BH2 range is calibrated under reference conditions including:
Temperature: 20 °C
Atmospheric pressure: 1013.25 hPa
Relative humidity: 50 %
Gravitational acceleration: 9.80665 m/s²
When operating under different environmental conditions, the generated reference pressure should be calculated using the relevant parameters and corrections.
Instrument Weight
The standard BH2-700B SP weighs approximately:
22 kg without calibration masses
This provides a robust laboratory pressure standard while remaining manageable for installation and servicing.
With optional automation equipment, the instrument weight can increase depending on the selected configuration.
Optional OP0004 Motorization
The europascal BH2-700B can be equipped with:
Option OP0004
This provides:
- Motorized rotation of the calibration masses
- Visualization of the piston position using indicator lights
Piston rotation helps reduce friction effects between the piston and cylinder.
Motorized rotation also reduces manual intervention during repetitive calibration sequences.
The piston position indication assists the operator in maintaining the piston within its correct operating position.
Optional OP0301 Calculator Module
For more advanced calibration workflows, the BH2-700B can be equipped with:
Option OP0301
This option provides functions including:
- Motorized mass rotation
- Dynamic piston position visualization
- Calculator module
- Automatic pressure calculation
- Automatic display of generated pressure
- Consideration of temperature
- Consideration of atmospheric pressure
- Consideration of humidity
- Computer data transfer
- Calibration data traceability
- Support for calibration certificate generation
This allows the traditional physical pressure balance to be integrated into a more digitally supported calibration workflow.
Technical Highlights
Model: europascal BH2-700B SP
Device type: Hydraulic Deadweight Tester
Configuration: Single piston
Number of pistons: 1
Measuring range: 2 to 700 bar
Measuring range: 0.2 to 70 MPa
Measuring range: 200 to 70,000 kPa
Manufacturer imperial range: 30 to 10,000 psi
Maximum pressure: 700 bar / 70 MPa
Standard accuracy: 0.01 % of reading
Enhanced accuracy: Up to 0.006 % on request
Typical piston area: 3.92450 mm²
Piston material: Tungsten carbide
Cylinder material: Treated steel
Generator base: CH2-1250B
Pressure medium: H40 oil
Fluid density: Approx. 860 kg/m³
Instrument weight without masses: Approx. 22 kg
Measurement principle: Piston gauge / deadweight tester
Standard gravity: 9.80665 m/s²
Local gravity: Available
Motorization: Optional OP0004 / OP0301
Automatic pressure calculation: Optional OP0301
Computer data transfer: Optional OP0301
Technical Data
| Feature | europascal BH2-700B |
|---|---|
| Manufacturer | europascal Aremeca |
| Model | BH2-700B SP |
| Device type | Hydraulic Deadweight Tester |
| Configuration | Single piston |
| Number of pistons | 1 |
| Measuring range | 2–700 bar |
| Measuring range | 0.2–70 MPa |
| Measuring range | 200–70,000 kPa |
| Manufacturer imperial range | 30–10,000 psi |
| Maximum pressure | 700 bar / 70 MPa |
| Standard accuracy | 0.01 % of reading |
| Enhanced accuracy | Up to 0.006 % on request |
| Typical piston area | 3.92450 mm² |
| Piston material | Tungsten carbide |
| Cylinder material | Treated steel |
| Generator base | CH2-1250B |
| Pressure medium | H40 oil |
| Fluid density | Approx. 860 kg/m³ |
| Weight without masses | Approx. 22 kg |
| Operating temperature | 18–28 °C |
| Standard gravity | 9.80665 m/s² |
| Local gravity | Available |
| Motorization | Optional |
| Piston position visualization | Optional |
| Automatic pressure calculation | Optional OP0301 |
| Computer data transfer | Optional OP0301 |
BH2-700B SP vs. BH2-700B DP
AREMECA offers two BH2-700B configurations.
| Feature | BH2-700B SP | BH2-700B DP |
|---|---|---|
| Configuration | Single piston | Dual piston |
| Number of pistons | 1 | 2 |
| Measuring range | 2–700 bar | 1–700 bar |
| Maximum pressure | 700 bar | 700 bar |
| Standard accuracy | 0.01 % | 0.01 % |
| Generator base | CH2-1250B | CH2-1250B |
| Pressure medium | H40 oil | H40 oil |
| Fluid density | 860 kg/m³ | 860 kg/m³ |
| Weight without masses | 22 kg | 22 kg |
The BH2-700B SP provides a simple single-piston configuration from 2 to 700 bar.
The BH2-700B DP extends the lower pressure limit to 1 bar by using two piston-cylinder systems and is particularly suitable when a wider dynamic pressure range is required.
Typical Calibration Applications
The europascal BH2-700B Hydraulic Deadweight Tester is suitable for testing, adjustment and calibration of:
- Mechanical pressure gauges
- Digital pressure gauges
- Reference pressure gauges
- Pressure sensors
- Pressure transducers
- Pressure transmitters
- Pressure switches
- Hydraulic pressure instruments
- Industrial pressure measurement systems
Typical users include:
- Professional calibration laboratories
- Pressure instrument manufacturers
- Industrial quality assurance departments
- Research laboratories
- Maintenance organizations
- Calibration service providers
Calibration and Traceability
The BH2-700B is supplied with a factory calibration certificate traceable to national standards.
Depending on the required calibration configuration, an accredited calibration certificate can also be selected.
Important metrological parameters include:
- Effective piston area
- Calibration mass values
- Gravity value
- Piston-cylinder characteristics
- Temperature
- Pressure coefficient
- Repeatability
The europascal calibration service provides professional calibration solutions for pressure balances, deadweight testers, pressure gauges, pressure sensors and pressure transmitters.
europascal can also provide support with maintenance, repair, configuration and selection of suitable pressure calibration equipment.
Why Choose the europascal BH2-700B?
The europascal BH2-700B Precise Hydraulic Deadweight Tester combines a wide hydraulic measuring range from 2 to 700 bar with a standard accuracy of 0.01 % of reading and enhanced performance up to 0.006 % on request.
Its single-piston configuration, 3.92450 mm² typical piston area, tungsten carbide piston, treated steel cylinder, CH2-1250B pressure generator and H40 oil pressure medium provide a robust physical reference for demanding hydraulic pressure calibration.
The standard BH2 platform provides straightforward manual operation, while optional motorization, piston position visualization, automatic pressure calculation and computer data transfer allow the instrument to be adapted to more advanced calibration workflows.
For professional laboratories requiring a physical hydraulic pressure reference up to 700 bar, the BH2-700B provides an excellent combination of measuring range, metrological performance, robust construction and configurable functionality.
Looking for the europascal BH2-700B or a hydraulic pressure calibration solution up to 700 bar? Contact europascal for expert advice, system configuration and professional calibration services tailored to your requirements.
