5
Maintenance
Periodic maintenance and cleaning are required for best performance of the
sensor. Generally, the membrane and fill solution should be replaced every
one to three months. If the sensor is being used in water having conductivity
less than about 100 µS/cm, it might be necessary to replace the fill solution
(but not the membrane) more often. Sensors installed in harsh or dirty
environments require more frequent maintenance. The optimum
maintenance frequency is best determined by experience.
WARNING
Pressurized spray injury
Before removing the sensor, be absolutely certain that the process pressure
is reduced to 0 psig and the process temperature is lowered to a safe level!
5.1
Cleaning the membrane
Keep the membrane clean and free from dirt and algae. Clean the
membrane with water sprayed from a wash bottle.
Do not use tissues to
clean the membrane.
5.2
Replacing the electrolyte solution and membrane
WARNING
Harmful substance
Fill solution may cause irritation. May be harmful if swallowed.
Read and follow the instructions.
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.
a) If it is tarnished, clean it using a cotton-tipped swab dipped in
baking soda or alumina.
September 2019
Quick Start Guide
Quick Start Guide
19