WIKA PSD-31 - Manual (Page 15)

15 WIKA operating instructions pressure switch model PSD-3x
GB
11430486.06 02/2012 GB/D/F/E
4. Design and function
4.1 Description
By means of a sensor element and by supplying power, the prevailing pressure is converted into a
switching signal or an amplified standardised electrical signal via the deformation of a diaphragm. This
electrical signal varies in proportion to the pressure and can be evaluated accordingly.
PSD-30: Process connection with internal diaphragm (standard version).
PSD-31: Process connection with flush diaphragm for highly viscous or crystallising media that may clog
the bore of the process connection.
4.2 Scope of delivery
Cross-check the scope of delivery with the delivery note.
For flush design (model PSD-31) with pre-mounted sealings and protection cap.
5. Transport, packaging and storage
For the protection of the diaphragm, the flush design (model PSD-31) is delivered with a
special protection cap.
■ In order to avoid damage at the diaphragm and/or the process connection thread,
remove the protection cap by hand only just before installation.
■ Keep the protection cap for subsequent storage or transport.
■ Fit the protection cap before dismounting and transporting the instrument.
5.1 Transport
Check the instrument for any damage that may have been caused by transport. With flush design
(model PSD-31), additionally check the diaphragm for any optical damage.
Obvious damage must be reported immediately.
4. Design and function / 5. Transport, packaging and storage