Instructions for Use
– SCHMIDT
®
Flow Sensor SS 20.600
Page 31
7 Information concerning operation
Environmental condition Temperature
The
SCHMIDT
®
Flow Sensor SS 20.600
monitors the temperature of both
medium and electronics. As soon as the specified operating range of the
electronics (-20 ... +70 °C) is exceeded, the sensor switches off both
measuring functions associated with the medium and signals the error by
means of the LED bar according to Table 5. As soon as proper operational
conditions are restored, the sensor resumes measuring mode.
Even when exceeding or underrunning the operating tempera-
tures for a short time, the sensor may be damaged irreversibly.
Environmental conditions Medium
The
SCHMIDT
®
Flow Sensor SS 20.600
is also suitable for relatively im-
pure gases provided that no harmful, chemical aggressive constituents
23
are included. Dust or non-abrasive particles can be tolerated as long as
they do not form any deposits on the sensor chip.
Deposits or other soiling must be detected during regular inspections and
removed during cleaning because they can lead to distortion of the meas-
urement result (see chapter
Dirt or other deposits on the sensor head cause false measure-
ment results.
Therefore, the sensor must be checked for contamination at reg-
ular intervals and cleaned if necessary.
Condensing liquid components in the measuring medium or even immer-
sion of the sensor probe into liquids must be avoided at all costs.
Always avoid liquids on the sensor during operation.
It leads to serious measurement distortions and can damage the
sensor in the long term.
When using the sensor outdoors, it must be protected against di-
rect exposure to the weather.
23
Strong mineral acids e.g. can be critical; in general the suitability has to be checked.
