This calibration changes the slope
of the curve of measured values.
It influences the display and the
analog output.
Calibration is only possible for
values > 25 % of the final value
of the measuring range.
It can be reset (
→
menu item
CAr
).
If the start-up delay is active (dSt > 0), the following conditions apply:
As soon as the flow has reached the value 3% of the final value (FV)
• the start-up delay starts and
• the outputs are switched according to the programming: ON with
the NO function (Hno / Fno), OFF with the NC function (Hnc/Fnc).
During the start-up delay 2 cases are possible:
• fast increase of flow,
switch point / acceptable range are
reached
within dSt
→
outputs remain active
• slow increase of flow, switch
point / acceptable range are not
reached
within dSt
→
outputs are reset
Page 29
ENGLISH
Customer-specific
calibration (CGA)
Start-up delay (dSt)
Example
dSt
with
hysteresis function:
Technical information / Functioning / Parameters
Q
10 l/min
10 l/min
8 l/min
12 l/min
A
A2
A1
A = curve of measured values
without calibration
A1, A2 = curve of measured values
after calibration
display
t
SP
Q
dSt
rP
3%
1
0
1
0
1
dSt
2
3
4
5
6
7
flow reaches 3 % of the final value (FV)
→
dSt starts, the output
becomes active
dSt has elapsed, flow has reached SP
→
the output remains active
flow falls below SP but remains above rP
→
the output remains active
flow falls below rP
→
the output is reset
flow reaches 3 % of the final value again
→
dSt starts, the output
becomes active
flow reaches SP
→
the output becomes active
dSt has elapsed, flow has
not
reached SP
→
the output is reset
Hno
Hnc
1
2
3
4
5
6
7
