Hach-Lange UVAS sc - Manual (Page 28)

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Maintenance
5.2 Cleaning measuring path
Normal operation of this device may require the use of chemicals or samples that
are biologically unsafe.
• Observe all cautionary information printed on the original solution containers
and safety data sheets prior to their use.
• Dispose of all consumed solutions in accordance with the local and national
regulations and laws.
• Select the type of protective equipment suitable to the concentration and
quantity of the dangerous material being used.
If the wiper interval is set correctly and the wiper profile is changed on time,
additional cleaning of the measuring path is not necessary.
1. Open the MAIN MENU.
2. Press SENSOR SETUP and confirm.
3. Press SELECT SENSOR (if there is more than one sensor) and confirm.
4. Press DIAG/TEST and confirm.
5. Press TEST/MAINT and confirm.
6. Press SIGNALS and confirm.
7. Remove sensor from the tank.
Depending on the degree and nature of the soiling, clean using window
cleaner, grease remover or 5 % hydrochloric acid (operating the wiper arm
using the Enter key can help the cleaning process.)
After leaving to soak for 5–10 minutes, you must carefully clean the
measuring path with distilled water. Objective: [ER] and [EM] < 500
Confirm ENTER=WIPE.
8. Press the back-button to leave the menu SIGNALS.
9. Press the back-button to leave the menu TEST/MAINT. Confirm RETURN
PROBE TO PROCESS.
10. Confirm READY. Automatic wiping action and back to measurements.
D A N G E R
Potential danger with contact with chemical/biological substances.
Working with chemical samples, standards and reagents can be dangerous.
Make yourself familiar with the necessary safety procedures and the correct handling of
the chemicals before use and read and follow all relevant safety data sheets.