Burkert Type 8035 - Manual (Page 86)

84
Operatingandfunctions
This dosing mode allows for starting the dosing of a quantity proportional to the activation duration of the digital
input DI1, according to the formula:
X = A*T + B
• where A is the proportionality factor in dosing units per second,
• B is the offset in dosing units,
• X is the dosing quantity, in dosing units,
• and T is the activation duration of the digital input DI1, in seconds with a resolution of 5 ms.
→
Calculate constants A and B (see example in “Table 11”) in order:
• the activation duration "T" is within a time interval related to the process,
• the activation duration "T" is lower than the real filling duration, taking into account the flow rate in the pipe,
• (A*T + B) is always lower than 100 000 dosing units,
• (A*T + B) is higher than or equal to 6 divided by the set K factor (in pulse/litre),
• the minimum activation duration (100 ms) is observed,
• the maximum activation duration (300 s) is observed,
OPtiONAL MODE EXt. [t] A= 0.000
→
Enter the value of constant A, in dosing units per second
(the dosing units have been configured in chap. “9.7.2”).
→
Confirm.
REtURN
B= 0.000
→
Enter the value of constant B, in dosing units.
→
Confirm.
Figure 66: Configuring the dosing mode "EXT. [T]"
Table 11: Calculation example of constants A and B
Dosing quantities Required activation durations "T" Value of constant A Value of constant B
110 litres 2 seconds
5 l/s 100 litres
120 litres 4 seconds
130 litres 6 seconds
150 litres 10 seconds
→
If you do not want to adjust another parameter, go to the "END" parameter of the Parameters menu and press
ENTER to save the settings or not and go back to the Process level.
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Type 8025 - 8035 BATCH