Hach EZ Serie Manuel De L'utilisateur page 20

Reagents, standards and cleaning solutions are supplied by the user. The tubing is factory installed.
Read the label on each tube to identify the correct plumbing connection. Do the steps that follow to
install all of the necessary fluid connections.
1. Use 1/8-in. or 1/4-in. OD tubing (PFA based on the application) to connect the sample line. If a
selection pinch valve is used, make sure to pull the tubes into the pinch valve. Refer to
number 6.
2. Use 1/8 in. OD tubing to connect the rinse line to the rinse selection valve. The rinse solution is
de-mineralized water.
Note: There are pre-installed tubes for the rinse line, reagents, validation and drain connections at the fluid
connections port on the bottom of the analysis panel. Refer to
3. Use 1/8-in. OD tubing to connect the reagents and validation solutions line. Connect the reagent
line to the applicable bottle. Refer to Refer to
on page 21.
4. Use 1/4-in. OD tubing to connect the drain line. Refer to
guidelines on page 18.
5. Use 1/4-in. OD tubing to connect the instrument air feed. Use the instrument air is used to purge
the analyzer and prevent corrosion caused by gases (e.g., chlorine gas) from outside the
analyzer. The instrument air is also used to operate the external sample valves on the
preconditioning panel (if installed). Refer to
6. Use 3/8-in. OD tubing to connect the overflow tube. The overflow tube drains the analysis
compartment if there are leakage of sample fluids or reagent fluids in the compartment. Use the
same guidelines as the drain line to install the overflow tube. Refer to
7. Push on the pinch valve to manually open the pinch valve and install the tubing. Refer to
Figure 6, number 4.
20 English
Figure 6, number 2.
Figure 6 number 2 and
Figure 6
Figure 6, number 1.
Install the bottles
number 2 and Drain line
Figure 6, number 3.
Figure 6,