Application

Deadweight testers are the most accurate reference-grade technical devices for calibration and/or verification of pressure measuring instruments. Direct pressure measurement, as the weight applied to an area, and the use of high-class materials ensure excellent measurement uncertainty and long-term stability for up to 5 years. For these reasons, this equipment is most suitable for industrial laboratories, national metrological institutes, and research laboratories. Due to its closed pressure generation system and simple operating principle, the CPB5000 is ideally suited for on-site testing and maintenance of high-precision measuring instruments.

Functionality

To create individual test points, calibrated masses are placed on the piston system, which are adapted to the specific application. The pressure is generated by an integrated pump. A fine adjustment wheel is used for smooth pressure tuning. The masses are selected with optimal graduation, proportional to the most commonly used pressure steps. Measurements are taken when equilibrium is reached between the pressure generated in the piston part and the pressure generated by the piston system and the masses. Due to the high quality, the generated pressure remains stable for several minutes, allowing calibration/verification or adjustment of the tested pressure measuring instrument.

Pressure generation devices

are divided into versions depending on their purpose:

• Pneumatic, without connection to an external pressure source, with built-in pump (-P)

  • up to 1 MPa

• Pneumatic/Vacuum (-P, -V)

  • up to 10 MPa or -0.1 MPa

  • Pressure or vacuum generation using a connected pressure or vacuum source

• Hydraulic (-H)

  • up to 100 MPa

  • with built-in pre-pressure pump

  • universal press from 0...100 MPa

• Pneumatic (-XP, -XPV), press -1...100 bar, MX0x2 + MX0x2, internal pump up to ~10 bar, 2 shut-off valves (for piston cylinder system and test item), 2xPt100 for temperature measurement of the piston cylinder system, spherical adjustable stand for piston cylinder, readout unit

• Hydraulic (-XH press 0...1000 bar, MX0x2 + MX0x2, internal pump up to ~35 bar, 2 shut-off valves (for piston cylinder system and test item), 2xPt100 for temperature measurement of the piston cylinder system, spherical adjustable stand for piston cylinder, readout unit

• Other pressure generation devices on request

Special features

As a reference standard for the pressure unit, with an extended uncertainty of 0.01% FS. Working pressure standards with standard deviation: 0.002%, 0.0006% when transferring the pressure unit from national standards with NSP and standard deviation (0.002% and 0.0003% respectively).
A factory calibration/verification certificate is provided as standard. For reference standards, a verification certificate traceable to national standards is provided.
High long-term stability with a recommended recalibration cycle of 5 years.
Re-verification interval: 2-5 years.
The masses are made of non-magnetic steel. Matching to the specified pressure unit, local gravity, or manufacturing of masses to nominal weight is provided at no extra cost.
The patented quick-release ConTect connector allows quick replacement of piston systems depending on the required range.
Universal pressure generation devices and their use as comparators: -0.1...16 MPa - pneumatic (air, nitrogen) up to 160 MPa - hydraulic (transformer oil, kerosene, castor oil and others on request).

Application

Means of reproducing and transferring the pressure unit from -1 to 16 MPa (gas medium) up to 160 MPa (hydraulics).
Reference measuring instrument for verification, calibration, and adjustment of pressure measuring instruments in production and/or laboratories.