3.3.2.1 Required materials
- 30 % Perhydrol-Solution; Fa. Merck Cat. No.: 1.07209.1000
Procedure
1 ► Remove the system water container. Fill with 3% Perhydrol solution and empty the
liquid waste container.(Put about 100 ml 30 % Perhydrol solution in the tank, and fill
up with purified water to the 3 L mark. (3.5L volume). Mix carefully. Replace the
system water container.
2 ► Touch the Maintenance button on the screen.
3 ► Touch the Service Cleaning button on the screen.
4 ► Start. The procedure takes 50 min and consumes about 2.8 L. When cleaning is
finished the status changes to Stand-by. Allow the solution to react for 20 min.
5 ► Empty the liquid waste container.
6 ► Clean the system water container and refill with system water. Replace the container
on system.
7 ► Touch the Cleaning button again. Rinsing with system water starts (50 min).
Version 1.0 – May 2006 3 - 6 Chapter 3.3
RD/Hitachi cobas e411 Service Manual
Version 1.0 – May 2006 3 - 7 Chapter 3.3
8 ► Repeat points 5 to 7 twice to guarantee that the whole system is filled with system
water.
9 ► After finishing, the top of the screen changes to Stand-by. Please empty the liquid
waste container and refill the system water container with system water. The system
is now ready for the normal routine.
In case of frequent high water conductivity errors, check that the pipettor LLD voltage is 1.5 V or lower.
Otherwise, repeat the cleaning process with system water until the voltage is reduced to 1.5 V.
In case of strong contamination repeat the whole cleaning procedure again.
Note: There are some instruments that generate the alarm "Distilled Water: 25-01-01" during
Cleaning and the status shifts to Stand-by. However there is no problem with the
performance of cleaning function if enough system liquid (around 3 L) has run.