Calibration technology WIKA data sheet CT 31.22 Applications ■ Primary standard for calibrating the pressure scale in a pneumatic range from -1 ... 120 bar / -14.5 ... 1,600 psi ■ Reference instrument for factory and calibration laboratories for the testing, adjustment and calibration of pressure measuring instruments ■ Complete, stand-alone system, also suitable for on-site use Special features ■ Total measurement uncertainty starting from 0.015 ... 0.006 % of reading ■ Five different piston-cylinder systems available for ranges ±1 bar, 0.1 ... 7 bar, 0.2 ... 25 bar, 1 ... 70 bar and 1 ... 120 bar, or also for ranges in psi and kPa ■ Stable aluminium base with a strong impact-resistant ABS cover for heavy industrial use combined with compact dimensions and light weight ■ Interchangeable pistons and mass sets for each model, mass sets manufactured from stainless steel ■ Factory calibration includes traceability to national standards, as standard; with UKAS calibration possible as an option Description Proven primary standard The model CPB3500 dead-weight tester is a genuine primary standard, which derives the measurement of pressure directly from its fundamental equation p = F/A. This mechanical measurement principle provides superior reliability and stability over time, eliminates most risks of measurement error and reduces calibration uncertainties. It makes the CPB3500 the ideal tool for the calibration of any type of pressure measuring instruments on a daily basis. Robustness and modularity The instrument is built on a tough, stable aluminium base with light weight corrosion and impact-resistant ABS case. Piston cylinders are interchangeable among the various models within the CPB3500, so that in case of changing requirements any CPB3500 tester can easily be upgraded on other available ranges. WIKA data sheet CT 31.22 • 03/2015 Mass sets are fully interchangeable between pistons of the same range within the claimed standard accuracy. The mass set is made of non-magnetic stainless steel so that masses remain extremely stable over time. Bases can also be quickly converted into a comparator by substituting suitable transfer standard for the piston and mass set. Ease of operation Two built-in precision soft seat valves combined with a volume adjuster provide fine pressure control capability. A safety pattern gauge is fitted to the instrument base to show the approximate pressure. The masses are top loading (except on the 25 bar/400 psi range) for easier and faster operation and available in the most common pressure units. IwikaII ^ Part of your business Data sheets showing similar products and accessories: Dead-weight tester in compact design; model CPB3800; see data sheet CT 31.06 Pressure balance; model CPB5000; see data sheet CT 31.01 Pressure balance for high pressure; model CPB5000HP; see data sheet CT 31.51 Pressure balance differential pressure version; model CPB5600DP; see data sheet CT 31.56 CalibratorUnit; model CPU6000; see data sheet CT 35.02

The mass load is proportional to the target pressure and this is achieved through optimally graduated disc weight. As standard, these disc weights are manufactured to the standard gravity (9.80665 m/s²), though they can be adjusted to a specific location and also UKAS calibrated. The piston-cylinder system Both the piston and cylinder are manufactured from materials with very small pressure and thermal expansion coefficients, which results in a very good linearity of the effective area of the piston and thus a high measurement accuracy. An overpressure protection is integrated, which prevents...

tity pressure tity pressure tity pressure tity pressure tity pressure per piece per piece per piece per piece per piece Piston and make-up weight [Psi] 1) Quantity Nominal Quantity Nominal Quantity Nominal Quantity Nominal pressure per pressure per pressure per pressure per piece piece piece piece 1) Other ranges like “in. water” and “mm. water” also available on request. WIKA data sheet CT 31.22 • 03/2015

Dimensions Storage case for mass set (optional) Theoretical starting value; corresponds to the pressure value generated by the piston or the piston and its make-up weights (by their own weight). To optimise the operating characteristics more masses should be loaded. The smallest pressure change value that can be achieved based on the standard mass set. The smallest pressure change value that can be achieved based on the optional set of fine increment masses. For further reductions, an accessory set of class M1 or F1 trim masses is available. The accuracy is in reference to the measurement value,...

Connections Connection for piston-cylinder system G 1 female thread Test item connection G 1/2 female thread, loose union connection, incl. adapter set to G 1/4 and G 3/8 female threads External pressure connection G 1/4 female thread, G 1/4 B x 1/4 NPT (female) adapter in scope of supply Pressure transmission medium Base Pneumatic based on clean, dry and non-corrosive gases (e.g. air or nitrogen) Permissible ambient conditions Operating temperature 10 ... 30 °C / 50 ... 86 °F Dimensions Base 510 x 490 x 300 mm / 20.1 x 19.3 x 11.8 inch (W x D x H), for details, see technical...

Dimensions in mm Front view (1) Connector for piston-cylinder system (3) Test item connection (4) Inlet valve (5) Volume adjuster with star handle (7) Rotatable feet DH-Budenberg (8) Pressure generation control schematic Standard connection piston-cylinder system Test item connection Adapter, see scope of delivery Sealing ring USIT 10.7 x 18 x 1.5 WIKA data sheet CT 31.22 ∙ 03/2015

Pneumatic/hydraulic separator For calibrating low-pressure hydraulic instruments with gas air/liquid separator is used. It can also be used to protect the pressure balance from contamination. Set of adapters As a standard, the pressure balance (dead-weight tester) is equipped with a connector for connecting the test item. For this purpose, various threaded adapters, which can be easily changed, are available: ■■ Set of adapters (BSP): G ⅛, G ¼, G ⅜, G ½ ■■ Set of adapters (NPT): ⅛ NPT, ¼ NPT, ⅜ NPT and ½ NPT ■■ Set of adapters (Metric): M12 x 1.5, M20 x 1.5 Pneumatic/hydraulic separator, model...