Instructions for Use SS 20.260
Page 13
Analog outputs
Error signaling
If the supply voltage is too high or if the sensor detects a defect, one
respectively both interfaces emit 0 V or 2 mA
7
.
Representation of the measuring range
The measuring range of the corresponding measuring value is
mapped in a linear way to the signaling range of its analog output.
For flow measurement the measuring range reaches from zero to the
selectable end of the measuring range w
N,max
(= 100 % in Figure 6).
A higher flow up to 110 % (= 11 V or 21.6 mA) is still output in a line-
ar way, moreover the signal remains constant.
Voltage output w
N
Current interface w
N
wN
Out
N
N
U
V
w
w
,
max
,
10
)
4
(
16
,
max
,
mA
I
mA
w
w
wN
Out
N
N
Figure 6 Representation for flow velocity
The measuring range of the medium temperature is -20 to +120 °C
(Figure 7). Falling below this temperature it is still output in a linear
way down to -30 °C (3 mA), going deeper the signal remains con-
stant. An exceeded of the temperature range is output in a linear
way up to +130 °C (21.2 mA), moreover this output remains con-
stant.
For a correct temperature measurement, the flow velocity
on the sensor head must be > 2 m/s. An excessive tem-
perature value is output if flow velocity is < 2 m/s.
7
In accordance with NAMUR specification
!