Endress+Hauser Proline Prosonic Flow 91 Operating Instructions Manual page 97

Proline Prosonic Flow 91
Endress+Hauser
Functional description SYSTEM PARAMETER
MEASURING MODE Pulse output
(Contd)
STANDARD
Only flow components of the positive flow direction are output.
Components in the opposite direction are not taken into account.
SYMMETRY
The absolute value of the positive and negative flow components is taken into account.
Status output
!
The information is only applicable if LIMIT VALUE was selected in the function ASSIGN
STATUS OUTPUT.
STANDARD
The status output signal switches at the defined switch points.
SYMMETRY
The status output signal switches at the defined switch points, irrespective of the sign. In
other words, if you define a switch point with a positive sign, the status output signal
switches as soon as the value is reached in the negative direction (negative sign), (see
illustration).
Example for the SYMMETRY measuring mode:
Switch-on point: Q = 4
Switch-off point: Q = 10
m = Status output switched on (conductive)
n = Status output switched off (nonconductive)
Totalizer
STANDARD
Only positive flow components are output.
Negative components are not taken into account.
SYMMETRY
The positive and negative flow components are balanced.
In other words, net flow in the flow direction is registered.
Note!
Q
10
4
0
- 4
- 10
➀
➀ ➁ ➀
Description of device functions
t
➁ ➀
A0001247
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