Instructions for Use
– SCHMIDT
®
Flow Sensor SS 20.500
Page 28
6 Commissioning
Before switching on the
SCHMIDT
®
Flow Sensor SS 20.500
the following
checks have to be carried out:
Mechanical mounting:
o
Immersion depth of sensor probe and alignment of enclosure.
o
Tightening of fastening screw respective spigot nut.
o
Installation of pressure safety devices.
For measurements in media with overpressure check if fas-
tening screw is tightened properly and pressure safety de-
vices are installed.
Connecting cable:
o
Proper connection in the field (switch cabinet or similar).
o
Tightness between sensor connector and connecting cable (flat
seal must be inserted correctly into the female cable connector).
o
Tight fit of spigot nut on connecting cable connector at sensor en-
closure.
After turning on the operating voltage, the sensor reports initialization by
switching on all four LEDs simultaneously for one second at a time, se-
quentially in the colors red, orange and green.
If the sensor detects a problem during initialization, it reports the problem
after initialization according to Table 5. An extensive overview of error
causes and troubleshooting measures is given in Table 9.
If the sensor is in the correct operational state after initialization it switches
into measuring mode. The indication of flow velocity (both LEDs and ana-
log output) switches for a short period to maximum and settles after ap-
prox. 10 s at the rough measuring value. Correct measuring values can
be expected after approx. 30 s if the sensor probe already has the medium
temperature. Otherwise, the process will last longer until the probe has
reached the medium temperature.
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