Instructions for Use
– SCHMIDT
®
Flow Sensor SS 20.600
Page 10
General installation conditions
The sensor head of the
SS 20.600
consists of two basic elements:
The enclosing measuring chamber:
The measuring chamber, also referred to as chamber head, protects
the inner sensor chip from mechanical and electrical influences.
The aerodynamically
optimized design allows tilting around the longitu-
dinal axis of the sensor up to ±3° relative to the ideal measuring direc-
tion (see Figure 3-2) without significant impact on the measurement re-
sult
5
.
The axial tilting of the sensor head relative to the flow direc-
tion should not exceed ±3°.
The center of the chamber head (also used for specification of probe
length L) is the actual measuring point of the flow measurement and
must be placed in the flow as advantageous as possible, for example
in the middle of the pipe.
Position the sensor head always at the most advantageous
position for flow measurement.
The sensor chip:
The measurement direction is clearly defined by the measuring princi-
ple (unidirectional).
The measuring direction is indicated by means of two arrows; the first
indication is located on the front of the chamber head, the other one is
printed on the housing cover below the LED indication (see Figure 3-2).
With the remote version, an additional arrow is located at the cable end
of the sensor.
Note:
If the sensor has been mounted in the wrong direction (rotated by 180°
relative to the flow direction) and flow is available, it does not output
zero but wrong (too high) measuring values.
The sensor measures unidirectional and must be adjusted
correctly relative to the flow direction.
5
Deviation < 1 % of the measured value
