Hach astroTOC UV 4195-1010 Manuel D'utilisation page 29

• If measurement is not necessary or possible, use deionized water for sample in the analyzer.
To shut down the analyzer:
1. Replace all reagent containers with distilled or deionized water.
2. Turn off the UV lamp(s) from the Service/Relay test/lamps screen.
3. Flush the analyzer with the distilled or deionized water for 10 minutes.
4. Stop the analyzer to turn off the pumps. From the main menu, push the DOWN arrow, then push
ENTER.
5. Disconnect the gas line between the GLS and the IR manifold.
6. Flow clean, dry nitrogen or purified air through the IR cell to dry and clean it.
7. Turn off the main power to the analyzer.
Replace the pump head and pump tubing
Electrocution hazard. Remove all power from the instrument and relay connections before this
maintenance task is started.
Pinch hazard. Remove power from the instrument before maintenance or service activities are done.
Required items:
• Tube loading key
• Flat blade screwdriver
Flush the analyzer with DI water for 20 minutes before this procedure.
Use barb reducers to connect any reduction tubing as given in the pump kit instructions. For best
operation, use only the minimum lengths of tubing necessary.
Loosen the four captive screws and swing out the pump module to make the pump accessible. Refer
to Figure 15.
D A N G E R
C A U T I O N
English 29