Hach CLF10sc User Manual page 13

5. If the flow cell is not sufficiently clean, soak the flow cell for 10 to 15 minutes in a 1:3 mixture of
3-5% hydrogen peroxide solution and vinegar.
6. Rinse the flow cell with water.
7. Install the sensor in the flow cell and start the sample flow.
Replace the flow sensor
Under normal conditions, the flow sensor does not require regular maintenance or replacement.
However, if the LED flow indicator does not light when the float is at or above the float alignment
mark and power is applied, the sensor may need to be replaced. To replace the flow sensor, do the
illustrated steps that follow.
Note: It is not necessary to remove the chlorine sensor, drain the flow cell or power down the controller to replace
the flow sensor.
English 13