Instructions for Use
– SCHMIDT
®
Flow sensor SS 20.260
Page 16
8 Service information
Maintenance
Soiling of the sensor head may lead to distortion of the measured value.
Therefore, the sensor head must be checked for contamination at regular
intervals. If contaminations are visible, the sensor can be cleaned as de-
scribed below.
Cleaning of sensor head
If the sensor head is soiled or dusty, it must be cleaned carefully by means
of compressed air.
The sensor head is a sensitive measuring system.
During manual cleaning proceed with great care.
In case of persistent deposits, the sensor chip as well as the interior of the
chamber head can be cleaned carefully by using residue-free drying alco-
hol (e.g. isopropyl alcohol) or soapy water with special cotton swabs.
Figure 8 Suitable cotton swabs with small cleaning pads
For this purpose cotton swabs that have small, soft cotton pads are suita-
ble, e.g. type "SP4" of the brand "CONSTIX Swabs" of the manufacturer
"CONTEC". The flat, narrow side of the pads fit just between chamber
head wall and sensor chip and therefore exerts a controlled, minimal pres-
sure on the chip. Conventional cotton swabs are too big and therefore can
break the chip.
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