triOS nanoFlu - Malfunction and Maintenance; Cleaning and Upkeep; Cleaning the Housing; Cleaning the Measuring Window

24 D01-060en202008 Manual nanoFlu
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Malfunction & Maintenance // nanoFlu
6 Malfunction and Maintenance
To ensure an error-free and reliable measurement, the device should be periodically checked and maintained.
For this, the sensor must be cleaned rst.
6.1 Cleaning and Upkeep
Deposits (vegetation) and dirt depend on the medium and the duration of exposure of the medium. Therefore,
the degree of pollution depends on the use. For this reason, it is not possible to give a general answer to how
often the sensor should be cleaned.
Normally, the system is kept clean by the nano-coated window and also by the air cleaning system. If the con-
tamination is too bad, the following instructions should be followed.
6.1.1 Cleaning the Housing
To loosen caked-on dirt, we recommend softening the sensor for several hours in a rinsing solution. During any
cleaning, exposed connectors should be avoided so that these do not come in contact with water. To ensure
this, make sure that the locking cap of the connector is properly locked. Please inform yourself thoroughly about
the risks and safety of the cleaning solution used.
If the sensor is very dirty, additional cleaning with a sponge may be necessary. You should exercise extreme
caution to avoid scratching the glass of the optical path.
In the case of calcication, a 10 % citric acid solution or acetic acid can be used for cleaning.
Brownish dirt or spots can be contamination due to iron manganese oxides. In this case, a 5% oxalic acid solu-
tion or a 10% ascorbic acid solution can be used to clean the sensor. Please note that the sensor should only
briey come in contact with the acid, and then it should be thoroughly rinsed.
Under no circumstances should the sensor be cleaned with hydrochloric acid.
Even very low concentrations of hydrochloric acid can damage components made
of stainless steel. In addition, TriOS Mess- und Datentechnik GmbH cautions
against using strong acids, even if the sensor should have a titanium housing.
Please use protective goggles and gloves when cleaning the sensor, espe-
cially when using acids, etc.
CAUTION
NOTICE
Do not use any aggressive cleaning solutions, putty, sandpaper or cleaning solu-
tions that contain abrasive substances to remove caked-on dirt.
NOTICE
6.1.2 Cleaning the Measuring Window
You can clean the window with a lint-free cloth, a clean paper towel or a special optical paper from TriOS Mess-
und Datentechnik GmbH with a few drops of acetone. Make sure that you do not touch the window surface
with your ngers!
TriOS Mess- und Datentechnik GmbH o󰀨ers a cleaning set with a bottle of acetone and special optical cleaning
paper to simplify cleaning the optical window.