WIKA PG43SA-D Mode D'emploi page 6

2. Design and function
2.2 Integrated diaphragm monitoring
Status display
White: Diaphragm element intact
EN
Red: Diaphragm element defective
If the status display shows the red warning dot, the measures in
chapter 6 "Faults" must be followed.
Function
The continuous diaphragm monitoring indicates the current state of
the pressure element.
A defective diaphragm element will be immediately indicated to the
user as a red warning dot on the dial (see picture). With the aid of the
status display, the integrity of the pressure element can be checked
both prior to installation and during operation.
Second barrier
The diaphragm element serves as the first barrier between process
and ambience. A second barrier, located behind it, guarantees the
reliable separation of ambience and process, even in the event of
a rupture in the diaphragm element. The risk of any contamination
between ambience and process is eliminated by the second barrier.
6
WIKA operating instructions disphragm pressure gauge, model PG43SA-D
Diaphragm element
Second barrier