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Barcon LHC/PPC (HART)
Maintenance and repair
36
6.5
Changing the measuring cell
If the measuring cell is to be changed then Pepperl+Fuchs offers a complete housing
with the new measuring cell and process connection required but without an electronic
insert. Therefore, when changing the measuring cell, simply remove the electronic insert
from the old housing and install it in the new one. After changing the measuring cell, the
sensor parameters of the new measuring cell and the Barcon must be recalibrated.
•
Ordering a housing with measuring cell and process connection:
PPC-M 0-
LHC-M20-
LHC-M40-
•
For instructions on mounting the electronic insert and for entering sensor
parameters see chapter 6.4 "Changing the electronic insert"
•
For instructions on calibration see chapter 4 "Commissioning".
6.6
Changing the gasket
The gasket in contact with the medium and inside the process connection of the Barcon
PPC-M20 can be replaced. Except for the PTFE gasket, all gaskets can thus be
interchanged as required. The different temperature limits should therefore be observed
for individual materials.
Dichtung
1
FPM, Viton
6
FPM, Viton grease-free
A
FPM, Viton oil and grease-free for oxygen
2
NBR
7
FFKM, Kalrez Compound 4079
4
EPDM
* Upper temperature limit according to specifications of standard instrument
Changing the gasket
•
Loosen the screws on the
retaining ring of the process
connection.
•
Remove the retaining ring and
process connection.
•
Replace gasket.The surfaces
each side of the gasket and the
gasket itself must be free from
fibres and dirt.
•
Secure the process connection
with the retaining ring and
screws
-
-
NA -
-
-
NA -
-
-
NA -
Temperaturgrenzen
-20 °C (-4 °F)*
-10 °C (+14 °F)*
-10 °C ... +60 °C (+14 °F ... +140 °F)
-20 °C (-4 °F)*
+5 °C (+41 °F)*
-40 °C (-40 °F)*
Gasket
Replaceable
process connection
Holding ring
with screws
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