Emerson Rosemount FCL-01 Reference Manual page 46

Maintenance
October 2023
of suspended solids, for example, open recirculating cooling water, membrane cleaning or
replacement will be more frequent.
9.2.2 Clean the membrane
Clean the membrane with water sprayed from a wash bottle.
NOTICE
Do not use tissues to clean the membrane.
9.2.3 Replace the electrolyte solution and membrane
CAUTION
Harmful substance
Fill solution may cause irritation. May be harmful if swallowed.
Avoid contact with skin and eyes.
Table 9-1: Spare parts
Part number
9550094
33521-00
23501-08
23502-08
9210356
Procedure
1. Unscrew the membrane retainer.
2. Remove the membrane assembly and O-ring.
3. Hold the sensor over a container with the cathode pointing down.
4. Remove the fill plug.
5. Allow the electrolyte solution to drain out.
6. Inspect the cathode.
7. Wrap the plug with two turns of pipe tape and set aside.
8. Prepare a new membrane.
46
Description
O-ring, Viton
Membrane retainer
Free chlorine membrane assembly: includes one membrane
assembly and one O-ring
Free chlorine membrane kit: includes three membrane assemblies
and three O-rings
#4 free chlorine sensor fill solution, 4 oz. (120 ml)
a) If it is tarnished, then clean it using a cotton-tipped swab dipped in baking
soda or alumina.
Use type A dry powder alumina intended for metallographic polishing of
medium and soft metals.
b) Rinse thoroughly with water.
a) Hold the membrane assembly with the cup formed by the membrane and
membrane holder pointing up.
2-014
®
Reference Manual
00809-0200-3412
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