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Calibration technology

Pressure balance Model CPB5000
WIKA data sheet CT 31.01

Applications
■ Primary standard for defining the pressure scale in a range ■ Reference instrument for testing, adjusting and calibrating

up to 100 bar (pneumatic) or 1,000 bar (hydraulic)

pressure measuring instruments in factories and calibration laboratories ■ Self-contained, complete system alsosuitable for on-site measurements/calibrations

Special features
■ Total uncertainty of measurement down to 0.008 % of ■ Factory calibration certificate as standard, traceable to

reading

National Standards, DKD/DAkkS calibration certificate available as an option ■ High long-term stability with a recommended recalibration cycle of 5 years ■ Masses manufactured from stainless steel andaluminium, local gravity adjustment possible at no additional charge ■ The patented ConTect quick-change system enables fast and secure exchange of the piston cylinder system in order to change the measuring range.

Pressure balance model CPB5000

Description
Proven primary standard Pressure balances are the most accurate instruments for the calibration of electronic or mechanical pressure measuringinstruments. The direct measurement of pressure, (P = F/A) and the use of high-quality materials, result in small measurement uncertainties and an excellent long-term stability of five years (Recommendation in accordance with the German Calibration Service DKD/DAkkS). For these reasons pressure balances have already been used in the calibration laboratories of industry, national institutes andresearch laboratories for many years. Self-contained operation Due to the integrated pressure generation and the purely mechanical measuring principle, the CPB5000 is ideally suited to on-site use as well as service and maintenance purposes.
WIKA data sheet CT 31.01 ∙ 11/2010
Data sheets showing similar products and accessories: Pressure balance - compact version; model CPB3000; see data sheet CT31.05 Pressure balance - high pressure; model CPB5000HP; see data sheet CT 31.51 Pressure balance - differential pressure; model CPB5000DP; see data sheet CT 31.52 CalibratorUnit; model CPU5000; see data sheet CT 35.01

Basic principle Pressure is defined as the quotient of force and area. Correspondingly, the core of the CPB5000 is a very preciselymanufactured piston cylinder system, which isloaded with masses in order to generate the individual test points. The weight applied is proportional to the desired pressure and accomplished by using optimally graduated weights. These weights are manufactured to standard gravity (9.80665 m/s²) although, for fixed location usage, they can be adjusted to a customer-specified local gravity.

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Easy operation Depending on theinstrument version the pressure is set via an integrated pump or via an external pressure supply by the use of control valves. For fine adjustment a very precisely adjustable spindle pump with a precision spindle running only within the pump body is mounted.

As soon as the measuring system reaches equilibrium, there is a balance of forces between pressure and mass applied. The excellent quality of thesystem ensures that this pressure remains stable over several minutes, so that the device under test can be calibrated or time-consuming adjustments can be carried out without any problems.

Piston cylinder system
Both the piston and cylinder are manufactured from Tungsten Carbide. Compared to other materials, Tungsten Carbide has very small pressure and thermal expansion coefficients, whichresults in a very good linearity of the effective crosssectional area of the piston and high measurement accuracy. Piston and cylinder are very well protected in a solid stainless steel housing, against contact, impacts or contamination from outside. In addition, overpressure protection is integrated, which prevents the piston from being forced out vertically and avoids damage to the piston...