WIKA CPB5000HP - Handbuch (Seite 6)

Pressure Balance High-Pressure GB
CPB 5000 HP
WIKA Operating Instructions Pressure Balance High-Pressure Version 2.3 6
2. Product Description .
2.1 General Product Information .
Application
Pressure balances are the most accurate instruments for the calibration of electronic or mechanical
pressure measuring instruments. The direct measurement of pressure, according to its definition as a
quotient of force and area, and the use of high-quality materials result in small uncertainties of
measurement and an excellent long-term stability of five years.
For these reasons pressure balances have already been used in calibration laboratories of industry,
national institutes and research labs for many years. Due to the integrated pressure generation and
the purely mechanical measuring principle the CPB 5000 HP is also ideally suited for on-site use as
well as service and maintenance purposes.
Piston cylinder system
The hydraulic high-pressure piston cylinder systems are available for pressure ranges 2500 bar, 4000
bar and 5000 bar respectively 40000 psi, 60000 psi and 70000 psi. The accuracy is 0.025 % (optional
also 0.02 %) of reading.
Functioning
In order to generate the individual test points, the piston cylinder system is weighted with mass-loads,
which are also calibrated and specially adapted to the respective application.
The pressure is set via an integrated pump. For fine adjustment an adjustable volume with precision
spindle is available. The weight applied is proportional to the desired pressure and provided by using
optimally graduated weights. As soon as the measuring system reaches equilibrium, there is a
balance of forces between pressure and wheel weights.
Due to the high-grade quality of the system this pressure remains stable over several minutes, so that
for instance adjustments of your device under test can be carried out without any problems.