Hach-Lange NITRATAX sc - Manual (Page 27)

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Maintenance
6.3 Change the wiper profile
Refer to Figure 8 and the following steps to change the wiper profile.
Note: First remove the sensor out of the flow-through unit until the wiper can be extended without
resistance.
For this purpose on the menu set SENSOR SETUP>CONFIGURATION>BYPASS to
"NO". For more information about the flow-through unit refer to the instruction sheet of the
flow-through accessories for NITRATAX sc.
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. Remove the sensor out of the basin.
Note: For disassembly the sensor from the flow-through unit, refer to the instruction sheet of the
flow-through accessories for NITRATAX sc.
7. Confirm the displayed OUTPUT MODE information.
8. Select REPLACE PROFILE and confirm.
9. Lift the retaining strap ( Figure 8 , item 1), move the cap bottom up and remove it
( Figure 8 , item 2 and 3).
10. Confirm REMOVE CAP!
Note: Only on instrument versions with 1 or 2 mm measuring path.
11. The wiper extends automatically. Exchange the wiper profile ( Figure 8 , item 4) and
replace the cap to lock in place ( Figure 8 , item 5).
12. Confirm REPLACE PROFILE! PUT ON CAP!
Note: Only on instrument versions with 1 or 2 mm measuring path.
13. Press BACK.
14. Remove the sensor back to the tank or install it in the flow-through unit. If necessary
adjust "YES" for the flow-through unit in the configuration menu.
15. Confirm RETURN PROBE TO PROCESS (Measuring operation after automatic
wiping).
16. The exchange of the wiper profile is completed.
C A U T I O N
Obey the locally applicable accident prevention regulations. Wear protective gloves where
necessary during the change of the wiper rubber.