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WIKA operating instruction, model CPP120-X
EN
08/2020 EN/DE
2. Short overview
The connection for the necessary external pressure or vacuum supply is located on the
rear side of the instrument.
By connecting the test item and a sufficiently accurate reference pressure measuring
instrument to the test pump, the same pressure will act on both measuring instruments.
By comparison of the two measured values at any given pressure value, a check of the
accuracy and/or adjustment of the pressure measuring instrument under test can be
carried out.
The two test connections are equipped with G ½ female loose union connections.
Corresponding thread adapters are available for the calibration of instruments with
different connection threads.
Any comparison test pump, model CPP120-X can converted to a pneumatic dead-weight
tester by the addition of the appropriate piston cylinder system (CPS3500) and mass set
(CPM3500).
The CPP120-X features optimal characteristics for use in the laboratory, as well as the
ruggedness needed for industrial applications.
The pneumatic comparison test pump requires a regulated supply of clean dry gas to
operate. We recommend using a Nitrogen Cylinder as the gas from this is normally dry
and clean. Alternatively use compressed air, filtered and dried to remove oil and moisture
which could cause that the piston cylinder system or the moveable parts of the base unit
become sticky.
2.3 Scope of delivery
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Instrument base
■
Two fine metering valves for pressure inlet and pressure outlet or vacuum
■
Volume adjuster for fine pressure adjustment
■
Two test item connections with G ½ female thread, loose union connection
■
Connection for external pressure or vacuum supply
■
Adapter set for test item selectable from 3 different sets:
•
Adapter set “BSP” G ½ male on G ⅛, G ¼, G ⅜ and G ½ female
•
Adapter set “NPT” G ½ male on ⅛ NPT, ¼ NPT, ⅜ NPT and ½ NPT female
• Adapter set “metric” G ½ male on M12 x 1.5 and M20 x 1.5 female
■
Tool and maintenance set
Cross-check scope of delivery with delivery note.
