Note:
•
The instrument is pre-configured
for symmetrical measurement.
Change the configuration in field
A2 for asymmetrical measurement
(see chapter 5.2.1).
•
The conductor for the potential
matching pin must be connected
to the “PA/PM” terminal of the
instrument for symmetrical
measurement.
•
If the software setting
“asymmetrical” is chosen for a
symmetrical connection, this will
reduce the service life of the
reference electrode.
•
The instrument is approved for
protection class II and is generally
connected without protective earth.
•
Cable termination is only
required for CPM 223!
ϑ
ϑ
S
NC
NC
S
CPK 7
CPK 7
PH-AN01.CDR
11 12 13
11 12 13
Scree
n
Sc
re
en
wt
gn
ye
bk
PA/
PM
PA/
PM
BNC
gn wt ye
bk
bn
bn
bn
BNC
Potential matching pin
(PM/PMC)
Ref
Ref
bn
Fig. 3.18
pH electrode connection
to Liquisys M
CPM 223 / 253
Left:
Asymmetrical (without PMC)
Right:
Symmetrical (with PMC)
S
S
NC
NC
PA/
PM
PA/
PM
bk
Sc
re
en
CPK 7
CPK 7
bn
bk
S
c
reen
bn
bn
Potential matching pin
(PM/PMC)
pH/
mV
Ref.
Ref.
pH/
mV
RED-AN01.CDR
bn
bk
BNC
BNC
Panel-mounted
instrument
Field
instrument
Panel-mounted
instrument
Field
instrument
Fig. 3.19
ORP electrode connection
to Liquisys M
CPM 223 / 253
Left:
Asymmetrical (without PMC)
Right:
Symmetrical (with PMC)
Installation
Liquisys M CPM 223 / 253
16
Hauser