Replace The Tubing; Replace The Electrodes - Hach EZ Serie Manuel De L'utilisateur

1. Flush the dispenser piston with deionized water to remove the reagent.
Note: Set the drain pump to on during this step.
2. Remove the deionized water from the dispenser (fill the dispenser with air).
Note: Set the drain pump to on during this step.
3. Remove power to the analyzer.
4. Remove the syringe. Refer to
5. Replace the valve. Refer to the illustrated steps that follow.
6. Apply power to the analzer. Set the analyzer to on.
7. Fill the dispenser with reagent. Examine for leaks.
8. When the procedure is complete, push F2 > Dispenser > [select dispenser] > E > Init to start the
dispenser operation.

9.13 Replace the tubing

Replace all of the analyzer tubing: pinch valve tubing, sample tubing, reagents tubing, drain and rinse
tubing. Tubing sets are available based on the analyzer model.
1. Replace the tubing and make the connections at the same fittings.
2. When the procedure is complete, start the analyzer and look for leaks.

9.14 Replace the electrodes

The usual lifespan of an electrode is approximately one year with standard laboratory use, but the
actual lifespan of the sensing module can change based on the type of samples. Replace the
electrode when the slope decreases and readings start to drift. Before an electrode is replaced, make
sure that the unusual measurements are caused by a defective sensing module.
Refer to the documentation supplied with the electrode for additional information.
32 English
Replace the dispenser syringe on page 31.