Maintenance
Memosens COS81D
30
Hauser
10.5 Wear parts and consumables
Parts of the sensor are subject to wear during operation. By taking suitable measures, you
can restore the normal operating function.
Corrective action
Reason
Replace process seals
Visible damage to a process seal
Replace spot cap , including O-rings
• Fluorescence layer is damaged or can no longer be cleaned
• Visible damage to the O-ring
1
2
3
4
6
7
8
5
A0027181
11
Memosens COS81D
1
2
3
4
Memosens plug-in head with optics assembly
Thrust collar
Sensor shaft
O-ring sensor shaft
5
6
7
8
Spot cap
Optical waveguide with temperature sensor
Process seal 10.77 x 2.62 mm
Process connection Pg 13.5
The sensor's spot cap can have either a c-shaped or u-shaped design.
1
2
A0034733
12
Design of spot cap
1
u-shaped
2
c-shaped
10.5.1 Replacing sealing rings
It is compulsory to replace the sealing ring if it is visibly damaged, and it is recommended if
replacing the spot cap. Only use original sealing rings.
The following O-rings can be replaced:
• Sealing ring for shaft sleeve: item 4 → 30→ 1, 9
• Sealing ring towards process (conductive for Ex): item 7
Summary of Contents for Memosens COS81D
Page 2: ...EU Declaration of Conformity Memosens COS81D 2 Endress Hauser EU Declaration of Conformity...
Page 42: ...Appendices Memosens COS81D 42 Endress Hauser 14 Appendices...
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