7 MAINTENANCE
134
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 133))
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 134))
Replacing beads
1.
Remove the residual-chlorine sensor from the device.
Removing the residual-chlorine sensor" (page 133))
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 134))
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
Summary of Contents for TW-100
Page 1: ...Water Distribution Monitor TW 100 Instruction Manual CODE GZ0000080187H ...
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