Endress+Hauser Proline Promag 55 Operating Manual page 75

Device functions Proline Promag 55 FOUNDATION Fieldbus
Endress+Hauser
3.1 Signal processing
The following figure shows the internal structure of the individual Transducer Blocks:
Transducer Block "Flow"
Amplifier
Density Param. - Fixed Value
System Param. - Install. Direct.Sensor
EPD - Adjustment
EPD - Param. Mode
EPD - Param. Time
Transducer Block "Totalizer"
Volume Flow
Mass Flow
Transducer Block "Diagnosis"
Transducer Block "Display"
Fig. 2: Internal structure of the individual Transducer Blocks
The "Flow" Transducer Block receives a signal variable (Volume) from the sensor as the input signal.
The amplifier converts this input signal to volume flow. The amplifier calculates the current mass
flow via the "Density Param. - Fixed Value" parameter ( → Page 87) by deriving the value from
the measured volume flow.
Optionally, the empty pipe detection function can be adjusted and switched on or off by means of
the EPD parameter group.
Simulation - Value Measurand
Simulation -
Measurand
Low Flow
Cut Off-Assign
Off Value
On Value
EPD
Tot. 1 - Assign
Mode_BLK
Tot. 2 - Assign
Auto
O/S
Auto
Tot. 3 - Assign
3 Transducer Block
System Param. -
Positive Zero Return
Auto O/S
Mode_BLK
Signals
Calc.
Mass Flow
Volume
Flow
Totalizer ... - Mode
Totalizer ... - Reset
Totalizer 1
S
Totalizer 2
S
Totalizer 3
S
Tot. - Reset All
CH 1
CH 2
CH 7
CH 8
CH 9
AI Block
A0006545-EN
75