Configuring a "volume dosing" function – Burkert Type 8619 User Manual
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Adjustmentandcommissioning
ON/OFF FX: Combine the TIME DOSING function with an ON/OFF function (see chap.
) for a conduc-
tivity measurement only in order to ensure prebleed of the system. Configure and activate the "ONOFF" function
before this "TIME DOSING" function so that it appears in this menu.
CMD SAFE: Confirm (choose "Mode: ON") or do not confirm (choose "Mode:OFF") the use of a fallback position
on the output when the "System switch" event (see chap. 8.10.17) has the state "ON". When use of the fallback
position is confirmed, enter a fallback position value of between 0 and 100% for each output.
• The time base is the one set in the "Date" and "Time" functions in the "Parameters" menu. See chap.
• When the "time dosing" function is already operational, modifying one of its parameters resets the
function.
• A new dosing cycle on the same channel cannot start until the previous dosing cycle has finished.
• Channels 1 and 2 operate independently of each other.
• When a dosing cycle is running on one of the channels, a new dosing cycle on the other channel is run
according to the following rules:
- when the current cycle is in prebleed phase, the lowest prebleed setpoint "PBLIMIT" of the 2 cycles is taken into
account. Moreover, the longest prebleed duration of the 2 cycles is taken into account.
- The prebleed phase on the new dosing cycle is not run if the current cycle is in dosing or waiting phase.
- It is only when both cycles are finished that the conductivity controller takes over.
8.10.16. configuring a "Volume Dosing" function
This function is available as an option. See chap. 8.10.4
This function is used to add a product to a process during a predefined period after a predefined volume of fluid
has been totalized.
fallback
position
process input
(DI1 / DI2)
real time clock
system switch
result (F: CMD1)
volume
dosing
setpoint (SP)
Figure 54 :
"Volume dosing" function
Once the function has been configured and activated, the result "Fx:" calculated is available in the list of
process variables on the "M0:MAIN" board. This list appears in the output configuring, user view config-
uring and datalogging menus to:
• Assign the result "Fx:" calculated to a physical output (analogue, AO, or digital, DO) (see chap. 8.10.22
and 8.10.22).
• Display the result "Fx:" on one of the user defined "Ux" views: see chap. 8.10.8.
• Logging the values of "Fx:" using the datalogger: see chap. 8.10.18.
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