Minifors 2 - Benchtop Bioreactor
Operation
07 February 2019
Page
153
of
214
Example
Analogue: 50 % = half speed = half delivery capacity
Digital: 50 % = 100 % speed, but only active 50 % of the time
= half delivery rate.
Ex works, the pumps are configured as follows:
Pump 1:
ACID
(addition of acid, digital, with fixed speed),
controlled by the
pH
parameter.
Pump 2:
BASE
(addition of base, digital, with fixed speed),
controlled by the
pH
parameter.
Pump 3:
ANTIFOAM
(addition of antifoaming agent, digital,
with fixed speed), controlled by the
Foam
parameter.
Pump 4:
FEED
: Addition of feed solution, analogue, with vari-
able speed, controlled by the user.
The figure below shows the pumps with the factory configuration.
In digital operation, pumping is used as an actuator for other pa-
rameters such as
pH
or
Foam
and receive their setpoint from the
corresponding controller. This means that it is not possible to enter
a setpoint.
When pumping in analogue operation (example to the left,
Pump 4
), setpoints can be specified in % of pump capacity.
The totalled actual value of a pump is displayed, depending on the
configuration, in the number of rotations or as an estimated volume
in mL or for
Pump4
as a weight in grams in the VALUE column on
the main screen.
