Hach NITRATAX plus sc, User Manual

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24
Maintenance
6.2 Clean the 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.
Additional cleaning of the measuring path is not necessary if the wiper interval is set for
the appropriate application and the wiper profile is replaced regularly.
To clean the measuring path:
1. Select MENU.
2. From the Main Menu, select SENSOR SETUP and confirm.
3. Select the appropriate sensor, if more than one sensor is attached and confirm.
4. Select TEST/MAINT and confirm.
5. Select MAINT.PROC. and confirm.
6. Confirm the displayed OUTPUT MODE information.
7. Select SIGNALS and confirm.
8. Confirm ENTER = WIPE.
9. Remove sensor from the tank. Depending on the degree and nature of the soiling,
clean measuring path using window cleaner, grease remover or 5 % hydrochloric
acid (the operation of the wiper arm using [WIPERTEST], [WIPE] can assist the
cleaning process).
10. Soak for 5–10 minutes, then carefully clean the measuring path with distilled water.
Objective: [ER] and [EM] < 500
11. Press BACK to return to MAINT.PROC.
12. Press BACK again. Confirm RETURN PROBE TO PROCESS (Measuring operation
after automatic wiping).
13. The cleaning of the measuring path is completed.
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.