Chlorine Sensor - Emerson Rosemount FCL Reference Manual

Maintenance
May 2019
8.2

Chlorine sensor

8.2.1 General
When used in clean water, the sensor requires little maintenance. Generally, the sensor
needs maintenance when the response becomes sluggish or noisy or when readings drift
following calibration.
Maintenance frequency is best determined by experience. For a sensor used in potable
water, expect to clean the membrane every month and replace the membrane and
electrolyte solution every three months.In water containing large amounts of suspended
solids, for example, open recirculating cooling water, membrane cleaning or replacement
will be more frequent.
8.2.2 Cleaning the membrane
Clean the membrane with water sprayed from a wash bottle.
Important
Do not use tissues to clean the membrane.
8.2.3 Replace the electrolyte solution and membrane
Harmful substance
Fill solution may cause irritation. May be harmful if swallowed.
Avoid contact with skin and eyes.
Table 8-1: Spare Parts
Part number
9550094
33521-00
23501-08
23502-08
9109536
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.
42
Note
Description
O-ring, Viton 2-014
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)
Reference Manual
00809-0200-3412
Emerson.com/Rosemount