Endress+Hauser Cerabar PMP51B, Руководство по эксплуатации

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Cerabar PMP51B Analog Product description
Hauser 11
Device with diaphragm seal
p
1
2
3
4
A0043583
1 Measuring element
2 Internal process membrane
3 Channel with fill fluid
4 Metal process membrane
p Pressure
The pressure acts on the process membrane of the diaphragm seal and is transferred from
a diaphragm seal fill fluid to the internal process membrane. The internal process
membrane is deflected. A fill fluid transfers the pressure to the measuring element on
which a resistance bridge is located. The pressure-dependent change in the bridge output
voltage is measured and evaluated.
Advantages:
• Depending on the version, can be used for process pressures up to 400 bar (6 000 psi)
and for extreme process temperatures
• High long-term stability
• High overload resistance
• Standard device (without diaphragm seal): secondary containment for enhanced
integrity
Applications for diaphragm seals
Diaphragm seal systems are used if the process and the device need to be separated.
Diaphragm seal systems offer clear advantages in the following instances:
• In the case of extreme process temperatures - through the use of temperature isolators
or capillaries
• In the case of strong vibrations - decouple the process from the device by using a
capillary
• In the case of aggressive or corrosive media - through the use of high-durability
membrane materials
• In the case of media that crystallize or contain solids - through the choice of suitable
coatings
• In the case of heterogeneous and fibrous process media
• If extreme measuring point cleaning is necessary, or in the event of very damp mounting
locations
• For mounting locations that are difficult to access