Endress+Hauser Mycom S CPM 153 Operating Instructions Manual page 30

6 Start-up
!
30
Note!
The two-circuit instrument offers you the possiblity of connecting two electrodes which
• work completely independently of each other (dual channel) or
• Redundancy measurement is always advisable when it is necessary to detect elec-
trode wear at an early stage.
• Look-ahead: Particularly in critical pipe neutralisations (inline), it is advisable to use
a look-ahead pH/redox electrode connected to a flow meter. This gives the controller
the opportunity of reacting to flow and pH changes at an early stage in the inflow.
One-side batch neutralisation with redundant pH measurement
Mycom 153
Fig. 15: Scheme of an one-side batch process with a redundancy pH measurement
Two-sided pipe flow neutralisation (inline)
with forward-locking pH measurement
pH elec-
trode 2
Fig. 16: Scheme of an two-sided inline process with a look-ahead pH measurement
pH electrode 2 pH electrode 1
Q Q
Mycom 153
Flow
meter
F
Q
Alkali Acid
L S
L B
L E
Mycom S CPM 153
Alcali or acid
pH elec-
trode 1
Q
Endress+Hauser