Batch Controller RA33
Commissioning
Hauser
27
6.2.2
Batch controller with flow measurement and 2-stage batching
This application describes the standard application of the batch controller. It describes two-stage
batching with two valves. This application uses one valve with a higher rate of flow and another
valve with a lower rate of flow to dose the medium. The valve with the higher rate of flow is used
for fast filling and is closed earlier so that the device can then dose more precisely with the second
valve.
a0014353-en
Fig. 25:
Batch controller with flow measurement and 2-stage batching
Input signals:
Flow, (pulse input or current input)
Output signals:
Valve control (relay or open collector)
Pump control (analog output, relay or open collector)
Required settings:
a.
Flow input: Enter pulse value or measuring range of the 0/4 to 20 mA input.
b.
Valve control: Set the choice of filling stages to 2-stage. Assign the selected outputs to control
the filling stages.
Display variables:
Preset counter (volume), batch counter (volume), volume flow, daily, monthly and annual counters
and totalizer for batched quantity, number of batches.
Miscellaneous notes:
• Before starting a batch for the first time, a value must be entered for the preset counter (
Otherwise batching cannot commence. Afterwards, the last preset counter value to be used is
stored in the device.
• To ensure that the after-run quantity is kept to a minimum during the first run even if the auto-
matic after-run correction function is activated (this function requires an initial measurement), it
is advisable to enter a measured value as the manual after-run correction value, or to teach the
device gradually with a small test quantity.
