PM11
Electronic pressure sensor
10
5.1 Use in hygienic areas according to 3-A
2
3
4
5
1
X X
The following applies to devices with 3-A certification:
u
Only use adapters with 3-A certification for the process connection.
u
Do not install the device in the lower section of the pipe or tank
(positions 4 and 5) in order that the medium can run off the area of
the measuring element.
5.2 Use in hygienic areas to EHEDG
The device is suited for CIP (cleaning in process) when installed correctly.
u
Observe the application limits (temperature and material resistance) according to the data
sheet.
u
Ensure that the installation of the device in the system complies with EHEDG guidelines.
u
Use self-draining installation.
u
Only use process adapters permitted according to EHEDG with special seals required by the
EHEDG position paper.
The seal of the system interface must not be in contact with the effective area of the ceramic
cell. Any influence of the seal on the effective area must be avoided.
u
When mounted in a tank, the installation must be flush mount. If not possible then direct water jet
cleaning must be possible. Dead spaces must be detected.
L
D
u
To avoid dead space adhere to the dimensions:
L < D
5.3 Ventilation diaphragm
5.3.1 Function ventilation diaphragm
The ventilation diaphragm enables the relative pressure measurement since barometric and
temperature-dependent pressure fluctuations between the measuring cell and the environment are
compensated for.
The ventilation diaphragm is protected against damage by a screwed filter cover with circumferential
ports.
