Labfors 5 – Version for Microorganisms
Interferences
Page
184
of
205
22 January 2019
Interference
No pO
2
control.
Possible cause
Remedy
By
The
pO
2
parameter and/or cascaded
parameter is/are
not activated.
Activate parameters.
Operator
The cascade settings are incorrect. Check the cascade settings and change as neces-
sary.
Operator.
No gas flow into culture vessel.
Refer to interferences in the gassing system.
Operator
Interference
pO
2
value fluctuates strongly or the stirrer speed fluctuates.
Possible cause
Remedy
By
Incorrect PID settings in the
pO
2
pa-
rameter.
Check the PID settings (
PID
parameter option) and
adjust as necessary. Special proportional factor
(
Prop. Term
) and dead band. Dead band value must
be 0 (zero).
Operator
11.7 Interferences Antifoam or Level Sensor and Antifoam Pump
Interference
Foam/medium is not detected.
Possible cause
Remedy
By
Sensor is not properly connected.
Check connections and connect properly as neces-
sary.
Operator
Interference
Foam/medium is always/frequently detected.
Possible cause
Remedy
By
Sheathing of sensor is damaged.
Have the sheathing of the sensor replaced.
INFORS HT
service techni-
cian or li-
censed dealer
Interference
Antifoam pump does not work.
Possible cause
Remedy
By
Parameter
Antifoam
is not activated. Activate the parameter.
Operator
Dosing time of parameter
Antifoam
=
0 (zero).
Set dosing time > 0.
Operator
Summary of Contents for Labfors 5
Page 208: ......