Instructions for Use
– SCHMIDT
®
Flow Sensor SS 20.500
Page 24
5 Signalling
Light emitting diodes (LED)
The
SCHMIDT
®
Flow Sensor SS 20.500
has four Duo-LEDs
18
(see Fig-
ure 5-1) that are either indicating flow velocity during error-free operation
in a quantitative way or signal the error cause (see Table 5).
Figure 5-1
No.
State
LED 1
LED 2
LED 3
LED 4
1
Ready for operation & flow < 5 %
19
2
Flow > 5 %
3
Flow > 20 %
4
Flow > 50 %
5
Flow > 80 %
6
Flow > 100 % = overflow
7
Sensor element defective
8
Supply voltage too low
9
Supply voltage too high
10
Electronic temperature too low
11
Electronic temperature too high
12
Medium temperature too low
13
Medium temperature too high
Table 5
LED off
LED shines orange
LED shines green
LED flashes red (approx. 1 Hz)
18
Component with two separately controllable LEDs (red and green) that generate in com-
bination the mixed color orange.
19
„%“ of the end of measuring range
LED 1
