HF scientific CLX Online Residual Chlorine Monitor (Old) User Manual
Page 32
CLX (9/07)
Page 26
REV 3.1
Flushing the System
It is recommended that the tubings replacements be timed with reagent replacement. Press
the SERVICE button to stop the water flow. Remove old reagents and discard. Place the
inlet tubings in a small container of clean water. Press SERVICE to return to operation
mode, press PRIME and then to flush the system with water. Remove the inlet tubings
from the water Press PRIME and then to remove most of the water.
Note: After a PRIME the CLX will perform a water calibration (WCAL). It will take a few
minutes to complete this procedure.
3 Month Tubing Replacement
The “B” tubings need replacement more often due to the fact that they are subject to wear
from the reagent “Pump”. The check valves should not need to be replaced and should be
saved. Please note that the check valves are directional and that the “IN” side is smaller in
diameter (see drawing).
Steps:
1
Flush the system as described above to reduce personal contact with the reagents.
2
Press SERVICE to stop the flow of sample water and drain the cuvette.
3
Remove and retain the thumb screw and washer on top of the pump; pull the pump
hammer up and out of the way of the “B” tubing. Do not remove the hammer
completely.
4
Work on one reagent side at a time. Disconnect the “C” tubing between the reagent
cap and the check valve.
5
Remove the check valve from its seat by pulling it down and out.
6
Replace the “B” (black) tubing between optics inlet and the check valve OUTLET.
Discard the old “B” tubing.
7
Replace the check valve into its seat.
8
Reconnect the “C” tube (from the reagent bottle caps) to the check valve INLET.
9
Repeat steps 4-8 for the other reagent.
10 Check the drawing on the following page to ensure correct installation.
11 Return to operation as described.
Annual Tubing Replacement
Once a year, complete the 3 Month Tubing Replacement as above, and then follow the
steps below:
1. Replace the two “C” tubings (from the check valves to the reagent bottles).
2. Replace the two “D” tubings (Reagent Bottle intake tubing).
Note: “D” tubing is notched on one side. This notched side should face the bottom of bottle.
3. Turn the knurled top on the optics system counterclockwise (as viewed for the top)
until the cuvette just “pops” out, but do not remove the top.
4. When the cuvette “pops” out, move the retaining o-ring & remove the cuvette. You
may need a stiff wire such as a bent paper clip to grasp the cuvette. Retain this cuvette
for future use if it can be cleaned.
5. Install the new cuvette by pushing it firmly in place and turning the knurled top
clockwise until the cuvette is held securely.
6. Check the drawing on the following page to ensure correct installation.
7. Return to operation as described.