Endress+Hauser Proline Prosonic Flow 93C Description Of Device Functions page 43

Device functions Proline Prosonic Flow 93C PROFIBUS DP/PA
Endress+Hauser
OUTPUTS → CURRENT OUTPUT 1 → CONFIGURATION
MEASURING MODE • PULSATING FLOW
(Continued)
Detailed explanations and How the current output responds under the following postulated conditions:
information
1. Defined measuring range (
• STANDARD
• SYMMETRY
• PULSATING FLOW
(continued on next page)
Functional description
(only with PROFIBUS DP)
If flow is characterized by severe fluctuations as is the case, for example, with
reciprocating pumps, flow components outside the measuring range are buffered,
balanced and output after a maximum delay of 60 seconds. If the data cannot be
buffered within approx. 60 seconds, a fault or notice message appears.
Under certain plant conditions, flow values can aggregate in the buffer, for example in
the case of prolonged and unwanted fluid backflow. However, this buffer is reset in all
relevant programming adjustments which affect the current output.
m n
–
I [mA]
20
4
0
m
and the following flow behavior:
Q
The current output signal is proportional to the measured variable.
The flow components outside the scaled measuring range are not taken into account
for signal output.
I [mA]
The current output signal is independent of the direction of flow.
I [mA]
Flow components outside the measuring range are buffered, balanced and output after
a maximum delay of 60 seconds.
I [mA]
S
6 Block OUTPUTS
m n
): and have the same sign
Q
n
t
t
t
A
t
S = A
A0001248
A0001265
A0001267
A0001268
A0001269
43