The europascal BH2-600B DP Dual Piston Deadweight Tester is a high-performance hydraulic pressure standard designed for precise calibration over a wide measuring range from 1 to 600 bar. The DP – Dual Piston – configuration incorporates two precision piston-cylinder systems, allowing the instrument to extend its measuring capability toward lower pressures while maintaining reliable performance up to 600 bar.
With a standard accuracy of 0.01 % of reading and enhanced performance up to 0.006 % on request, the europascal BH2-600B DP is designed for professional calibration laboratories, pressure instrument manufacturers, industrial quality assurance departments, research facilities and calibration service organizations.
The complete measuring range is:
1 to 600 bar
corresponding to:
0.1 to 60 MPa
and:
100 to 60,000 kPa
The manufacturer specifies an imperial measuring range of:
10 to 10,000 psi
The BH2-600B DP uses two precision piston-cylinder systems. The low-pressure piston is manufactured from treated steel, while the high-pressure piston is made from tungsten carbide. The cylinders are manufactured from treated steel.
Hydraulic oil is used as the pressure medium. Together with precision stainless steel calibration masses, the two piston-cylinder systems generate reproducible reference pressures according to the physical piston gauge principle.
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 BH2-600B DP Dual Piston Deadweight Tester provides:
- Precise hydraulic deadweight tester
- Dual piston configuration
- Two precision piston-cylinder systems
- Wide measuring range from 1 to 600 bar
- Measuring range from 0.1 to 60 MPa
- Measuring range from 100 to 60,000 kPa
- Manufacturer range from 10 to 10,000 psi
- Standard accuracy of 0.01 % of reading
- Enhanced performance up to 0.006 % on request
- Treated steel low-pressure piston
- Tungsten carbide high-pressure piston
- Treated steel cylinders
- Hydraulic operation with oil
- Stainless steel calibration masses
- Manual mass rotation as standard
- Standard or customer-specific gravity
- Robust BH2 design
- Optional motorized mass rotation
- Optional piston position visualization
- Optional environmental sensors
- Optional automatic pressure calculation
- Optional computer data transfer
Measuring Range from 1 to 600 bar
The europascal BH2-600B DP covers a hydraulic measuring range from:
1 to 600 bar
This corresponds to:
0.1 to 60 MPa
or:
100 to 60,000 kPa
The manufacturer specifies the imperial range as:
10 to 10,000 psi
The maximum pressure is therefore:
600 bar / 60 MPa
The wide dynamic range is one of the main advantages of the dual piston configuration. Compared with the single-piston BH2-600B SP, which starts at 2 bar, the BH2-600B DP extends the lower measuring limit to 1 bar.
Dual Piston Technology
The abbreviation DP stands for:
Dual Piston
The europascal BH2-600B DP therefore incorporates:
2 precision piston-cylinder systems
The use of two piston-cylinder systems allows the deadweight tester to cover a wider dynamic pressure range than a comparable single-piston configuration.
A larger piston area is used for the lower pressure range, while a smaller piston area is used for higher pressures.
This design provides an efficient combination of low-pressure capability and a maximum pressure of 600 bar.
Low-Pressure and High-Pressure Pistons
The two piston systems are optimized for different pressure regions.
The manufacturer specifies the piston materials as:
Low-pressure piston: treated steel
High-pressure piston: tungsten carbide
The cylinders are manufactured from:
treated steel
The high-pressure tungsten carbide piston provides high hardness, wear resistance and dimensional stability, characteristics that are particularly important for a precision piston gauge.
The dual piston design provides the flexibility required to generate reference pressures across the complete 1 to 600 bar measuring range.
Physical Piston Gauge Measurement Principle
The europascal BH2-600B DP Dual Piston Deadweight Tester operates according to the physical piston gauge principle.
The basic relationship is:
p = F / A
where:
p = generated pressure
F = force acting on the piston
A = effective piston area
The gravitational force produced by the calibration masses is primarily determined by:
F = m × g
where:
m = applied mass
g = gravitational acceleration
The simplified pressure equation therefore becomes:
p = (m × g) / A
The generated reference pressure is consequently based on defined physical quantities: calibrated mass, gravitational acceleration and the effective area of the selected piston-cylinder system.
For precision calibration, additional correction quantities are taken into account according to the calibration certificate and actual operating conditions.
Why Two Pistons?
The pressure generated by a piston gauge depends inversely on the effective piston area.
According to:
p = F / A
a larger piston area is advantageous for generating lower pressures, while a smaller piston area allows higher pressures to be generated with manageable calibration masses.
The BH2-600B DP therefore combines:
a low-pressure piston
and:
a high-pressure piston
within one deadweight tester platform.
This allows the instrument to achieve a minimum pressure of only 1 bar while still reaching a maximum pressure of 600 bar.
Accuracy of 0.01 % of Reading
The standard accuracy specified for the europascal BH2-600B DP is:
0.01 % of reading
For applications with more demanding metrological requirements, enhanced performance is available:
up to 0.006 % on request
Because the specification is related to the actual pressure reading, the BH2-600B DP provides strong metrological performance across its wide measuring range.
The actual measurement uncertainty achieved during calibration additionally depends on the individual calibration data, operating conditions, applied corrections and characteristics of the device under test.
Hydraulic Operation with Oil
The BH2-600B DP operates hydraulically with:
oil
Hydraulic operation is particularly suitable for medium and high pressure calibration because liquids have relatively low compressibility compared with gases.
Correct filling and venting of the hydraulic system are important for stable operation.
Trapped gas can adversely affect:
- Pressure stability
- Settling time
- Pressure generation
- Repeatability
Compatibility between the hydraulic medium and the device under test should always be verified before calibration.
Stainless Steel Calibration Masses
The BH2 range uses:
stainless steel calibration masses
The masses generate the gravitational force acting on the selected piston.
Together with gravitational acceleration and the effective piston area, the calibrated mass values determine the generated reference pressure.
Different engineering units can be selected for the principal mass set, depending on the required configuration.
Typical units include:
- bar
- psi
- kPa
- kg/cm²
Additional or intermediate mass sets can be selected according to the required calibration points.
Standard or Local Gravity
The gravitational force generated by the calibration masses depends on gravitational acceleration.
The conventional standard value is:
g = 9.80665 m/s²
Actual gravitational acceleration varies geographically.
The BH2-600B DP can therefore be configured for:
standard gravity
or:
customer-specific local gravity
Using the correct gravity value is particularly important for precision pressure calibration because a relative difference in gravitational acceleration directly influences the force generated by the calibration masses.
Measurement Uncertainty Contributions
The complete measurement uncertainty of a calibration with the BH2-600B DP depends on several influence quantities.
Relevant contributions can include:
- Calibration uncertainty of the masses
- Effective area of the low-pressure piston
- Effective area of the high-pressure piston
- Pressure coefficients
- Local gravitational acceleration
- Air buoyancy
- Piston-cylinder temperature
- Thermal expansion
- Hydraulic fluid properties
- Hydrostatic head difference
- Repeatability
- Sensitivity
- Pressure stability
- Resolution of the device under test
- Environmental conditions
The final uncertainty budget should therefore use the individual calibration data for the selected piston-cylinder system and mass set.
Hydrostatic Head Correction
When the reference level of the device under test differs vertically from the reference level of the deadweight tester, the resulting hydrostatic pressure difference can be considered.
The approximate relationship is:
Δp = ρ × g × Δh
where:
ρ = density of the pressure medium
g = gravitational acceleration
Δh = vertical height difference
For demanding calibration applications, this correction can be relevant to the overall measurement uncertainty.
Operating Conditions
The BH2 series is designed for an operating temperature range of:
18 to 28 °C
The manufacturer specifies calibration reference conditions of:
Temperature: 20 °C
Atmospheric pressure: 1013.25 hPa
Relative humidity: 50 %
Gravitational acceleration: 9.80665 m/s²
If the deadweight tester is used under different environmental conditions, the generated pressure should be recalculated using the relevant parameters and correction values.
Leveling and Installation
Correct leveling is important for reliable piston gauge operation.
The BH2 platform therefore includes:
- Leveling bubble
- Adjustable feet
The instrument should be installed on a stable working surface and carefully leveled before calibration.
This helps ensure that the piston operates vertically and minimizes unwanted lateral forces in the precision piston-cylinder assembly.
Connection of the Device Under Test
The BH2 series provides a:
swivel G1/2 standard connection
for the instrument under test.
Other fittings are available as options.
All pressure-containing components connected to the BH2-600B DP must be suitable for the maximum operating pressure of:
600 bar / 60 MPa
This includes:
- Tubing
- Hoses
- Fittings
- Adapters
- Valves
- Seals
- Device under test
The complete system must be depressurized before connections are changed.
Instrument Weight
The manufacturer specifies a device weight of approximately:
22 kg without calibration masses
With option OP0004 or OP0301, the device weighs approximately:
24 kg without calibration masses
The total system weight additionally depends on the selected calibration mass set.
Optional OP0004 Motorization
The europascal BH2-600B DP can be equipped with:
Option OP0004
This option provides:
- Motorized rotation of the calibration masses
- Piston position visualization using indicator lights
Piston rotation helps minimize friction effects between the piston and cylinder.
Motorized rotation also reduces manual intervention during repetitive calibration procedures.
The piston position indication assists the operator in maintaining the active piston within its correct operating position.
Optional OP0301 Calculator Module
For advanced calibration workflows, the BH2-600B DP can be equipped with:
Option OP0301
This provides functions including:
- Motorized operation
- Dynamic piston position visualization
- Environmental sensors
- Automatic pressure calculation
- Automatic display of generated pressure
- Calibration data traceability
- Computer data transfer
The optional calculator system makes it possible to combine the physical reference principle of a traditional deadweight tester with digitally supported pressure calculation and calibration workflows.
Technical Highlights
Model: europascal BH2-600B DP
Device type: Dual Piston Hydraulic Deadweight Tester
Configuration: Dual piston
Number of pistons: 2
Measuring range: 1 to 600 bar
Measuring range: 0.1 to 60 MPa
Measuring range: 100 to 60,000 kPa
Manufacturer imperial range: 10 to 10,000 psi
Maximum pressure: 600 bar / 60 MPa
Standard accuracy: 0.01 % of reading
Enhanced performance: Up to 0.006 % on request
Low-pressure piston material: Treated steel
High-pressure piston material: Tungsten carbide
Cylinder material: Treated steel
Pressure medium: Oil
Calibration masses: Stainless steel
Weight without masses: Approx. 22 kg
Operating temperature: 18 to 28 °C
Standard gravity: 9.80665 m/s²
Local gravity: Available
Standard mass rotation: Manual
Motorized mass rotation: Optional OP0004 / OP0301
Piston position visualization: Optional
Automatic pressure calculation: Optional OP0301
Computer data transfer: Optional OP0301
Technical Data
| Feature | europascal BH2-600B DP |
|---|---|
| Manufacturer | europascal Aremeca |
| Model | BH2-600B DP |
| Device type | Dual Piston Hydraulic Deadweight Tester |
| Configuration | Dual piston |
| Number of pistons | 2 |
| Measuring range | 1–600 bar |
| Measuring range | 0.1–60 MPa |
| Measuring range | 100–60,000 kPa |
| Manufacturer imperial range | 10–10,000 psi |
| Maximum pressure | 600 bar / 60 MPa |
| Standard accuracy | 0.01 % of reading |
| Enhanced performance | Up to 0.006 % on request |
| LP piston material | Treated steel |
| HP piston material | Tungsten carbide |
| Cylinder material | Treated steel |
| Pressure medium | Oil |
| Calibration masses | Stainless steel |
| Weight without masses | Approx. 22 kg |
| Weight with OP0004/OP0301 | Approx. 24 kg without masses |
| Operating temperature | 18–28 °C |
| Standard gravity | 9.80665 m/s² |
| Customer-specific gravity | Available |
| Standard mass rotation | Manual |
| Motorization | Optional |
| Piston position visualization | Optional |
| Automatic pressure calculation | Optional OP0301 |
| Computer data transfer | Optional OP0301 |
BH2-600B DP vs. BH2-600B Single Piston
AREMECA offers the BH2-600B in both dual-piston and single-piston configurations.
| Feature | BH2-600B DP | BH2-600B SP |
|---|---|---|
| Configuration | Dual piston | Single piston |
| Number of pistons | 2 | 1 |
| Minimum pressure | 1 bar | 2 bar |
| Maximum pressure | 600 bar | 600 bar |
| Standard accuracy | 0.01 % | 0.01 % |
| Pressure medium | Oil | Oil |
| Weight without masses | Approx. 22 kg | Approx. 22 kg |
| Motorization | Optional | Optional |
| Automatic pressure calculation | Optional | Optional |
The principal advantage of the BH2-600B DP is its lower minimum pressure.
While the single-piston BH2-600B begins at 2 bar, the dual-piston configuration extends the measuring range down to:
1 bar
Both configurations retain a maximum pressure of:
600 bar / 60 MPa
The BH2-600B DP is therefore particularly suitable when a wider dynamic calibration range is required.
Typical Calibration Applications
The europascal BH2-600B DP Dual Piston 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 Service by europascal
Regular calibration of a dual piston deadweight tester is important for maintaining reliable metrological performance.
Important calibration parameters include:
- Effective area of the low-pressure piston
- Effective area of the high-pressure piston
- Pressure coefficients
- Calibration mass values
- Gravity value
- Piston-cylinder characteristics
- Temperature
- Repeatability
- Relevant correction quantities
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 BH2-600B DP?
The europascal BH2-600B DP Precise Dual Piston Deadweight Tester combines a wide hydraulic measuring range from 1 to 600 bar with a standard accuracy of 0.01 % of reading and enhanced performance up to 0.006 % on request.
Its two precision piston-cylinder systems allow the instrument to cover a wider dynamic pressure range than the corresponding single-piston version. A treated steel piston is used for the lower pressure range, while a tungsten carbide piston provides the characteristics required for the high-pressure range.
The standard BH2 platform provides straightforward manual operation, while optional motorization, piston position visualization, environmental sensors, automatic pressure calculation and computer data transfer allow the system to be adapted to advanced calibration workflows.
For professional laboratories requiring a physical hydraulic pressure reference from 1 to 600 bar, the BH2-600B DP provides an excellent combination of wide measuring range, metrological performance, robust construction and configurable functionality.
Looking for the europascal BH2-600B DP or a precise 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.
