PID control in ÄKTA ready
In ÄKTA ready, PID control is used for controlling the pump speed based on flow velocity,
as measured in the flow meter cell.
The method instruction FlowTune is used for setting the three PID parameters. The
FlowTune instruction is available in group Pump in the Instruction Box in the Method
Editor module. There are two sets of parameter fields under FlowTune, one for each
flow kit size. Default values for the PID parameters are:
D
I
P
Column volume
0
25
0.3
1 l
0
25
0.3
2.5 l
0
15
0.3
10 l
1
0
10
0.5
20 l
1
1
ÄKTA ready High Flow Kits should be used for columns of 10 l or more.
It is usually not necessary to tune the PID parameters — the default values can be used
unchanged. If tuning is required, however, use large adjustments for the I-parameter.
(To slow down control, double the I value, and to speed it up, set it to half the initial value.)
ÄKTA ready Operating Instructions 28960345 AD
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14 Reference information
14.5 PID control
