2. Design and function
Reference chamber
The reference chamber is an evacuated pressure chamber behind
the diaphragm element and serves as a reference for the status
display of the diaphragm element.
In the event of a damaged diaphragm element
Vacuum in the reference chamber collapses
Reference chamber is pressurised with process pressure
Medium can ingress into the reference chamber
Colour of the status display changes to red.
Measuring instrument is defective and can no longer be used as a
reference for the process pressure.
Replace measuring instrument. The dismounting of the measuring
instrument is described in chapter 8.
Despite a damaged diaphragm element, due to the second barrier
no exchange has occurred between process and ambience
2.3 Scope of delivery
Cross-check scope of delivery with delivery note.
WIKA operating instructions disphragm pressure gauge, model PG43SA-D
EN
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