Endress+Hauser Proline Promass 83 - Display Transducer Block parameters

10 Block SPECIAL FUNCTION Device Functions Proline Promass 83 MODBUS RS485
134 Endress+Hauser
COMPENSATION
MODE
(continued)
7205 • Response when MODE 1 is selected:
For short batchings and for batching cycles that follow on quickly from one
other. Batching ends before the quantity specified in the function BATCH
QUANTITY (7203) is achieved and the after run quantity is recorded. The
exact batching switch-off time is calculated based on the previous after run
quantities.
The number of after run quantities which are to influence the calculation can
be specified in the functions AVERAGING DRIP (7207) and CALCULATION
MODE (7206). The after run quantity in MODE 1 is determined between the
switch-off point and the first undershooting of the low flow cut off. Any
subsequent fluid movements are not taken into account.
• Response when MODE 2 is selected:
For batchings where batching accuracy is vital and where process-related
fluctuations in flow occur during after running. Batching ends before the
quantity specified in the function BATCH QUANTITY (7203) is achieved and
the after run quantity is recorded. The exact batching switch-off time is
calculated based on the previous after run quantities.
The number of after run quantities which are to influence the calculation can
be specified in the functions AVERAGING DRIP (7207) and CALCULATION
MODE (7206). The after run quantity in MODE 2 is determined between the
switch-off point and the constant undershooting of the low-flow cut off. This
means that the lower the setting is for the low-flow cut off, the longer the after
run quantity is recorded. The batching is very accurate.
A0004711
Fig. 36 : Example diagram of a batching sequence and the respective response
in MODE 1 and MODE 2
Q = Flow
t = Time
t
1
= time period shorter than or equal to the maximum batching time
A = Coarse batching quantity
B = Fine batching quantity
C = After run quantity
(Effective batching quantity = A + B + C)
1 = Coarse batching starts and valve 2 opens (two-stage batching)
2 = Coarse batching ends / fine batching starts, valve 2 closes, valve 1 opens
3 = Fine batching ends, valve 1 closes (automatically when the specified batching
quantity is achieved)
4 = After run quantity recording in MODE 1 ends
5 = After run quantity recording in MODE 2 ends
a = After run quantity recorded in MODE 1
b = After run quantity recorded in MODE 2
s = Low flow cut off
Function description
SPECIAL FUNCTION → BATCHING FUNCTION → CONFIGURATION
t
Q
A
t
1
B
a
s
12345
b
C