
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.
PH-AN01E.CDRFig. 3.18
pH electrode connection
to Liquisys M
CPM 223 / 253
left:
Connection of CPS 11
with CPK 9
right:
Connection of CPS 401
with CPK12
RE-AN01E.CDR
Fig. 3.19
Redox electrode
connection to Liquisys M
CPM 223 / 253
left:
Asymmetrical (without PM)
right:
Symmetrical (with PM)
Installation Liquisys M CPM 223 / 253
16 Endress+Hauser
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