Endress+Hauser Proline Promag 300 - Page 72

Description of device parameters Proline Promag 300 Modbus RS485
72 Endress+Hauser
the output signal of the measuring device. The response time of the output signal
increases as the filter depth increases.
Selection
• Adaptive
– Strong flow damping with a short output signal response time.
– Some time is needed before a stable output signal can be generated.
– Not suitable for pulsating flow as the average flow can be different here.
• Dynamic
– Average flow damping with a delayed output signal response time.
– The average flow is displayed correctly over a measuring interval determined over a
long period.
• Binomial
– Weak flow damping with a short output signal response time.
– The average flow is displayed correctly over a measuring interval determined over a
long period.
• CIP
– This filter is also available for the Adaptive and Dynamic filter options.
– If the CIP filter has detected a change in the medium (abrupt increase in the noise
level, e.g. quickly changing medium conductivity values during CIP cleaning), flow
damping is greatly increased and the raw value (before flow damping) is limited by the
mean value (delimiter). This eliminates extremely high measured errors (up to several
100 m/s).
– If the CIP filter is enabled, the response time of the entire measuring system increases
and the output signal is delayed accordingly.
Examples
Possible applications for the filters
Application Adaptive Adaptive
CIP
Dynamic Dynamic
CIP
Binomial Binomial
CP
Pulsating flow (flow is negative
intermittently)
––– ––– ++ –– ++
Flow changes frequently (flow is
dynamic)
– –– ++ – ++
Clear signal, quick control loop (< 1 s) –– –– +
1)
++
Poor signal, slow control loop
(response time of a few seconds)
++ – –– ––– –––
Permanently bad signal ++ –– – ––– –
Short and severe signal distortion
after a while
++ ++
Replacement of a Promag 50/53:
system damping Promag 100 = 0.5 *
Promag 50/53
+++
Replacement of a Promag 10: system
damping Promag 100 = Promag 10
+ 2
+++
For a stable flow signal (no other
requirements)
+++
1) Flow damping value < 6