Endress+Hauser Mycom S CPM 153 Operating Instructions Manual page 63

Mycom S CPM 153
Endress+Hauser
CODE CHOICE
(default = bold)
MBB7 Relay:
Period:
t min:
E
Sensor technology:
MC1 Look-ahead measurement:
pH circuit 1 = controller
pH circuit 2 = look-ahead
MC2 Control with:
pH value circuit 1
pH value circuit 2
MC3 L :
B
L :
S
L :
E
MC4 Unit:
Unit:
4 mA value:
20 mA value:
INFO
n.c. Alkali dosing: Relay selection
000.0 s (for pulse length)
000.0 s Description see above
Note in display:
(only look-ahead)
In Quick Setup one process with look-ahead pH
!
measurement was selected.
Note!
Control with look-ahead measurement is only
possible in conjunction with a flowmeter and a two-
circuit transmitter.
Electrical assignment:
(only redundancy)
Selection of with which measured value, control is
effective.
0.5 m System arrangement
0.5 m Enter electrode/dosing point distances:
1.5 m L : Distance between the controlling electrode and the
S
acid dosing point
: Distance between the controlling electrode and the
L
B
alkali dosing point
: Distance from the controlling electrode to the
L
E
look-ahead electrode
Remark on Fig. 24: Electrode 1 is the controlling elec-
trode, electrode 2 is the look-ahead electrode.
Two-sided pipe flow neutralisation (inline)
with forward-locking pH measurement
pH elec- Flow
trode 2 meter
Q
Fig. 24: Schematic diagram of two-sided control with
look-ahead pH measurement
m
Flow velocity flowmeter
s Unit: Entry of the length and time unit for flow velocity
___ (e.g. m/s).
___ 4 mA value: Enter minimum flow velocity value.
20 mA value: Enter maximum flow velocity value.
6 Start-up
Mycom 153
pH elec-
trode 1
F
Q
Alkali Acid
L S
L B
L E
63