Xylem CL200 Waterproof Total Residual Chlorine Tester User Manual
Page 6
CL200 V6.0 06/05
6
Considerations and Techniques
1. If the meter has not been used for several weeks or is new, at least
two tests should be made to condition the electrode.
2. Do not touch the reagent tablets. Touching can cause
contamination.
3. If the electrode has not been used for in a 24hr period, wipe the tip
with a clean/dry paper towel before use.
4. Before use, wash the sample cups and the caps and then rinse them
completely.
5. The CL200 should not be left in a solution while turned off. If left in
solution while turned off, subsequent readings may take longer to
reach the correct value.
6. Do not touch the sensor surface except with a clean/dry paper towel.
7. When measuring solutions that have large differences in chlorine
concentration, i.e. 0.1ppm and 5.0ppm, use separate sample cups.
8. Discard the sample cup when it shows a color change.
9. Maintain the electrode by completely wiping dry and then replacing
the electrode cover immediately after taking a measurement. The
electrode should always be stored in the dry cap.
10. Cover the connector with the clear cover whenever the electrode is
removed from the meter body.
11. Gently stirring the probe in the solution for 10 seconds, within the
first minute of operation, will accelerate the process and yield more
accurate readings. Do not stir after 10 seconds.
Troubleshooting Guide
1. If the unit appears locked it is possible that the Data Hold mode has
been inadvertently accessed. If the HOLD icon is displayed, simply
press the MODE button or turn the meter off and restart.
2. If the meter latches up and cannot be reactivated by a button press,
remove the batteries and restart. Note that if the batteries are
removed, any stored readings will be lost.
Electrodes Types
The CL200 can also measure ORP and pH. To perform these tests,
the appropriate electrode must be acquired and connected to the
ExStik
®
. When the unit is turned on, it recognizes the type of electrode
that is connected and displays the appropriate unit of measure.