Table of Contents
Advertisement
Polishing the residual-chlorine sensor
When the sensitivity of the chlorine residual sensor declines, perform the following operation.
1. Remove the residual-chlorine sensor from the device.
(" Removing the residual-chlorine sensor" (page 142))
2. Prepare the attached sandpaper.
3. Hold the top of residual-chlorine sensor (above reference electrode), make the tip
(working electrode) of residual-chlorine sensor touched on the sand paper, and
polish it about 10 times with circular orbit.
4. After polishing, rinse the tip (working electrode) of residual-chlorine sensor using
tap water, and wipe it with a lint-free cloth.
5. Reattach the residual-chlorine sensor.
(" Installing the residual-chlorine sensor" (page 143))
Replacing beads
1. Remove the residual-chlorine sensor from the device.
(" Removing the residual-chlorine sensor" (page 142))
2. Replace the beads.
Remove all beads from inside the residual-chlorine/conductivity cell using the included
syringe and tube, then insert a new set of beads.
Note
Make sure to insert a full set of beads. Otherwise, the effectiveness of bead cleaning may be reduced.
3. Reattach the residual-chlorine sensor.
(" Installing the residual-chlorine sensor" (page 143))
Installing the residual-chlorine sensor
1. Fasten the residual-chlorine sensor with the retaining screw.
2. Connect the sensor connector.
3. Attach the cover and tighten the screws.
Note
To ensure accurate measurements, after replacing the residual-chlorine sensor run sample water and
operate the device for at least 2 hours before calibrating.
Reference electrode
Working electrode
Sandpaper
7 MAINTENANCE
143
Advertisement
Table of Contents
