Infors HT Multifors 2 Operating Manual page 204

Multifors 2 - Parallel Bench-top Bioreactor
Interferences
Interference
pH value drifts up and down over time or acid and base are added almost continuously in turn.
Possible cause
Incorrect PID setting in pH parame-
ter.
Incorrect strength of reagents: Con-
centration is too weak or too strong.
Page 204 of 211
Remedy
Check the PID settings and adjust as necessary.
Change the special proportional factor (Prop. Term)
or Dead band setting.
Check the strength of reagents. Adjust if necessary:
0.1 mol to 2.0 mol.
By
Operator
Operator
28 March 2018