Typical measurement errors for
water and different temperatures
of the medium.
The hysteresis keeps the switch-
ing state of the output stable if
the flow varies about the preset
value.
When the flow is rising, the out-
put switches when the switch-on
point has been reached (SPx).
When the flow is falling again,
the output switches back when
the switch-off point (rPx) has
been reached.
The hysteresis can be adjusted: First the switch-on point is set, then the
switch-off point with the requested difference.
The window function enables the
monitoring of a defined accept-
able range. When the flow varies
between the switch-on point
(SPx) and the switch-off point
(rPx), the output is switched (win-
dow function/NO) or not
switched (window function/ NC).
Page 27
ENGLISH
Measurement
accuracy
Hysteresis
Window function
Technical information / Functioning / Parameters
0
80 °C
25 °C
10 °C
Q min.
Q max.
max. neg.
error 10 %
of the end value
max. pos.
error 10 %
of the end value
t
Q
SP
rP
1
0
1
0
Hno
hysteresis
Hnc
t
Q
SP
rP
1
0
1
0
Fno
acceptable range
Fnc
