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Technical information / Functioning / Parameters
Measurement
accuracy
Hysteresis
Window function
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)
switched (window function/ NC).
max. pos.
error 10 %
of the end value
0
max. neg.
error 10 %
of the end value
Q min.
Q
SP
rP
1
0
1
0
acceptable range
Q
SP
rP
or
not
1
0
1
0
80 °C
25 °C
10 °C
Q max.
hysteresis
t
Hno
Hnc
t
Fno
Fnc
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