triOS nanoFlu - Preparing the Sensor for the Function Test and Zero Value Determination

25D01-060en202008 Manual nanoFlu
UseCalibration
Commis-
sioning
Introduction
General
Information
FAQ Technical DataWarranty
Customer
Service
Contact
Keyword
Index
Accessories
Malfunction &
Maintenance
nanoFlu // Malfunction & Maintenance
6.1.3 Preparing the Sensor for the Function Test and Zero Value Determination
Clean the probe as described in chapter 6.1.1 and 6.2.2. At the end of the cleaning process, rinse the probe
carefully with deionized water. Dry the sensor with a paper towel. Wipe the sensor o󰀨 with a little acetone on a
kitchen towel to remove any greasy residues.
Clean the sensor window with special optical paper or a soft, lint-free cloth and a few drops of acetone accord-
ing to the previous instructions on cleaning the measuring window.
Important: Polish the window next with a soft dry cloth or special optical paper to remove the thin lm that may
have appeared while cleaning the window.
Have a suitable measurement container lled with ultra-pure water ready nearby. Before this step, the measure-
ment container should already have been cleaned carefully with a detergent solution and rinsed with ultra-pure
water.
Immerse the sensor in the container, which has been su󰀩ciently lled with ultra-pure water so that the measur-
ing window is completely immersed in water. Never place the sensor on the measuring window. The measuring
window should be at least 10 cm from the oor.
Wait 10 – 15 minutes. During this time, hidden dirt can come loose from the sensor.
Remove the probe from the water and rinse it with ultra-pure water. Fill the container once more with fresh
ultra-pure water and immerse the sensor again. Lift the probe and move it around in the water to remove any air
bubbles that may have formed. Carry out the function test or the calibration of the sensor.
The sensors should be positioned diagonally in the measurement container, if at all possible, to prevent very
small, almost invisible air bubbles collecting at the top of the measuring window. When using an upright meas-
uring cylinder which requires the sensor to be positioned vertically, make sure to watch out for air bubbles in
the optical path.
Make sure the measurement container is su󰀩ciently stable!
For your own safety, you must wear the appropriate gloves and protective
goggles!
CAUTION