Table of Contents
Advertisement
Maintenance
Free Chlorine Sensor
Check the measurement at regular intervals, at least once a month. If the membrane is visibly soiled
clean it with a jet of water or a dilute HCl solution between 1‐5%. Do not clean with detergents or
solvents that would reduce the surface tension of the membrane.
Replacing the Membrane (PN 1000238)
Replace the membrane if heavily soiled or torn. First
unscrew the measuring chamber and then unscrew the
membrane cap. (See figure 5.1)
Remove the membrane from the cap, replace the
membrane and reinstall the cap on the measuring
chamber. Finally Refill the measuring chamber as
described below.
Refilling the Sensor
Refill the sensor with electrolyte once a year or sooner
depending on the chlorine level measured. Refill every 6
months for levels between 10 – 20 ppm and at every
membrane change.
Unscrew the measuring chamber from the sensor and
pour out the spent solution.
Fill the chamber to approximately 1 cm from the top
and tap it gently to dislodge any trapped bubbles inside
the chamber.
Screw the measuring chamber vertically back onto the
sensor ensuring all air inside the chamber is displaced
with liquid.
When the o‐ring begins to seal continue slowly
tightening until the stop.
The sensor is ready to use, re‐polarize the sensor for 60
minutes and recalibrate as described above.
Storage
The method for Storage of the sensor is dependent on
time.
For short term storage of several weeks the sensor can be stored filled inside the yellow protective cap
as long as the membrane is not allowed to dehydrate. Make sure the sponge inside the cap is wetted.
For longer terms rinse out the electrolyte with distilled water and allow the sensor to dry. Loosely
reassemble the dry sensor so as not to tension the membrane during storage.
1. Measuring Chamber
2. Membrane
3. Membrane Cap
Page 18
FCA‐22 Instruction Manual
Figure 5.1
Advertisement
Table of Contents
