Care and maintenance
contrAA 600
Edition 01/2014
69
1
Tube holder
2
Dosing tube
3
Tube holder
4
Screw top at the dosing unit
5 Tube guide lock screw
6
Tube guide clamp nut
Fig. 41
Dosing tube at the AS-GF
Cleaning the dosing tube
The dosing tube requires cleaning, dependent on the sample material, when:
The pH levels of the sample, the wash liquid and the air bubble are blurred, or if the
bubble is segmented.
The sample is spread out in the tube (tube is contaminated on the inside).
An 8 to 13% sodium hypochlorite solution (NaOCl) is recommended as a cleaning solution.
The following cleaning procedure should be repeated as often as is necessary.
1.
Fill the sodium hypochlorite solution into a 5 mL special cup and mount tray position 101
with it.
2.
Switch on the contrAA 600 and start the ASpect CS software.
3.
In ASpect CS open the window
Autosampler
with
. Change to the tab
Function
tests
4.
In the area
Tracker/Rotator
enter "101" into the list field and enable the option
Cup no
.
The autosampler arm moves to position "101".
5.
In the area
Dipping arm
in the list field
Depth
lower the autosampler arm into the
special cup with the arrow keys (approx. 50 mm).
Note:
The autosampler is only lowered if the arrow keys are used. After entering the
value directly into the list field, click the arrow keys once again!
6.
In the area
Pipetter
, in the list field
Volume [µL]
, use the arrow keys to set the volume
to be picked up (approx. 100 - 200 µL). The volume can be set in steps of 50 µL.
7.
Press the button
[Take up]
. The autosampler fills the dosing tube with the cleaning
liquid.
8.
Allow the cleaning liquid to work for approx. 20 min.
9.
In the area
Tracker/Rotator
enable the option
Wash position
.
10. The autosampler arm moves to the wash position.
