TT-CL
2
Free Chlorine Sensor
11
TURTLE TOUGH
4.0.3
Maintenance
Caution: The coating of the electrode finger must not be cleaned with emery cloth or other polishing agents!
Do not unscrew the metal end ring of the membrane cap, as this will destroy the membrane.
4.0.3.1
Routine maintenance
The electrolyte should be changed every three months, although it may be possible to extend the period if low
levels of chlorine are measured. It may be necessary to use a new membrane cap when changing the electrolyte.
In any event, the membrane cap should be changed every 12 months. If your unit has been ordered with the auto
calibrator then the calibration reagent should be changed every six months.
4.0.3.2
Diagnostic maintenance
4.0.4
Storage
To store the probe the membrane cap is unscrewed (note previous warning). The membrane G-holder must
be removed and discarded. The membrane cap and electrode finger should be rinsed in clean water and dried
in a place free of dust with a soft paper towel (do not damage the electrode areas). The dry membrane cap is
then loosely screwed onto the electrode shaft. The membrane must not rest against the measuring electrode.
Do not fully tighten the membrane cap.
When putting the probe back into use after storage, the electrode tip must be cleaned with the special abrasive
paper supplied (see 4.0.3.2) and a new membrane cap and G-holder must be used (follow 4.0.2).
4.0.5
Spares
Free Chlorine Membrane cap
M48 G
Free Chlorine Electrolyte
ECS2.1/GEL
Please contact us regarding any other spares.
4.0.6
Single flowcell
The o-ring is first inserted in the 1” opening of the adaptor followed by the PVC shim. Then the 1” PVC threaded
end cap is screwed in loosely. The probe is inserted into this prepared probe housing. Then the probe is fixed
in place by tightening (hand tight only) the threaded end cap, so the probe cannot move away from its position.
If calibration is impossible due to unstable or low output,
remove the sensor, displace the vent seal so that the vent hole
opening is free. The membrane cap can then be unscrewed. The
electrode finger is cleaned with a clean, dry, soft paper towel.
With the special abrasive paper supplied (blue) just the tip of
the dry electrode (the working electrode) is cleaned. Place the
special abrasive paper on a paper towel (on a flat, dry surface), hold
it at the corners and rub the electrode tip of the perpendicularly
held probe two or three times across the abrasive paper. Then
refill with electrolyte (see section 4.0.2). If necessary, use a new
membrane cap.
Recommendation:
Change the electrolyte every 3 months.
