Proline Promass 83E/F/O Description of Device Functions - FMC ...
Proline Promass 83E/F/O Description of Device Functions - FMC ...
Proline Promass 83E/F/O Description of Device Functions - FMC ...
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10 Block SPECIAL FUNCTION <strong>Device</strong> <strong>Functions</strong> <strong>Proline</strong> <strong>Promass</strong> 83<br />
Function description<br />
SPECIAL FUNCTION BATCHING FUNCTION CONFIGURATION<br />
COMPENSATION MODE<br />
(continued)<br />
• Response when MODE 2 is selected:<br />
For batchings where batching accuracy is vital and where process-related fluctuations<br />
in flow occur during after running. Batching ends before the quantity specified in the<br />
function BATCH QUANTITY (7203) is achieved and the after run quantity is recorded.<br />
The exact batching switch-<strong>of</strong>f time is calculated based on the previous after run<br />
quantities.<br />
The number <strong>of</strong> after run quantities which are to influence the calculation can be<br />
specified in the functions AVERAGING DRIP (7207) and CALCULATION MODE<br />
(7206). The after run quantity in MODE 2 is determined between the switch-<strong>of</strong>f point<br />
and the constant undershooting <strong>of</strong> the low-flow cut <strong>of</strong>f. This means that the lower the<br />
setting is for the low-flow cut <strong>of</strong>f, the longer the after run quantity is recorded. The<br />
batching is very accurate.<br />
Example diagram <strong>of</strong> a batching sequence and the respective response in MODE 1 and<br />
MODE 2:<br />
Q<br />
t 1<br />
A<br />
a<br />
b<br />
B<br />
s<br />
1 2 3 4 5<br />
C<br />
t<br />
A0004711<br />
Q = Flow<br />
t = Time<br />
t 1 = time period shorter than or equal to the maximum batching time<br />
A = Coarse batching quantity<br />
B = Fine batching quantity<br />
C = After run quantity<br />
(Effective batching quantity = A + B + C)<br />
1 = Coarse batching starts and valve 2 opens (two-stage batching)<br />
2 = Coarse batching ends / fine batching starts, valve 2 closes, valve 1 opens<br />
3 = Fine batching ends, valve 1 closes (automatically when the specified batching quantity is<br />
achieved)<br />
4 = After run quantity recording in MODE 1 ends<br />
5 = After run quantity recording in MODE 2 ends<br />
a = After run quantity recorded in MODE 1<br />
b = After run quantity recorded in MODE 2<br />
s = Low flow cut <strong>of</strong>f<br />
Page 150 • MN0M023<br />
Issue/Rev. 0.2 (12/12)