4.5
Connection of pH and redox electrodes
4.5.1
Special measuring cables
The pH and redox electrodes are connected
via special ready-made multi-wire and
shielded measuring cables:
• CPK 1 for electrodes without Pt 100
• CPK 7 for electrodes with Pt 100
• CPK 9 for electrodes withESA/ESS plug-in
head (TOP 68)
• CPK 6 for:
–
Sensopac with double reference electrode
–
1 pH single electrode, 1 reference
electrode and 1 Pt 100
–
2 pH combination electrodes and 1 Pt 100
or 1 common reference electrode, resp.
If you need to extend the measuring cables,
use the junction box VBA and
non-ready-made cables:
• CYK 71 for CPK 1, CPK 7 and CPK 9
• DMK
for CPK 6
(see connection accessories).
Caution:
It is vital to protect plugs and
terminals against moisture, because
moisture leads to inaccurate
measuring results!
For stranded inner wires use wire
end sleeves.
Outer screen
CPK 7
PM
Ref.
pH
bn
ye
gn
Coax bk
wt
Pt
100
PM
pH + Pt 100
CPK 1
Outer screen
PM
Ref.
pH / redox
bn
Coax bk
PM
pH / redox
Temp. (term. 13)
bn
Temp. (term. 11)
Temp. (term. 12)
PM
bk
pH (circuit 2)
pH (circuit 1)
wt
Coax rd
Ref. 2
Ref. 1
wt
Coax wt
gn
wt
PM bk
PE ye/gn
Outer screen
pH
Ref.
Pt 100
CPK 6-S
Application:
Sensopac CPA 320
with double reference
electrode
Temp. (- - -) 13
- - -
bn
Temp. (Ref.) 11 (Ref.) - - - (Ref.)
Temp. (- - -) 12
- - -
PM
PM
- - -
Signal
Slot 1
FCP1 (1)
Slot 2
FCP1 (2)
remove from PM, add cable sleeve
pH 1
pH/mV
- - -
remove
Ref. 1
Ref.
- - -
Ref. 2
Ref.
- - -
pH 2
- - -
pH/mV
rd
rd
gn
wt
wt
Coax
wt
Coax
rd
wt
PM
bk
rd
wt
gn
wt
PE
ye/gn
Outer screen: grounded via metal cable gland
or connected to PE
ye/gn is connected
to outer screen
under hose wt connected with bn
(alternatively: reference electrode)
Application:
2 pH combination
electrodes and
1 Pt 100 or
2 pH combination
electrodes and
1 common reference
electrode, resp.
pH 1
pH 2
Pt 100
CPK 6-A
1
2
3
Temp.
bn
Temp.
Temp.
PM
pH
remove
Screen, to 0 V (PM)
Ref.
bk
gn
wt
wt
Coax wt
Coax rd
wt
PM
bk
rd
wt
gn
wt
PE
ye/gn
Outer screen: grounded via metal cable gland
or connected to PE
ye/gn is connected
to outer screen
under hose wt connected
with bn
Application:
1 pH single
electrode,
1 reference
electrode and
1 Pt 100
pH
Ref.
Pt 100
CPK 6-D
1
2
3
CPK 9
for pH/redox
electrodes with and
without a built-in
temperature sensor
(for TOP 68 plug-in
heads ESA / ESS)
PM
pH/
redox
+Pt 100
PM
Ref.
pH
bn
ye
gn
Coax bk
wt
Pt
100
bk
CPK167E.CDR
Fig. 4.22
Ready-made
measuring cables
CPK1-7M.CDR
Fig. 4.23
CPK 1 to CPK 9:
connection of outer
screen to PE using
a metal cable gland. The
contact originates in the
inner cable gland.
pm152e04.chp
mycom CPM 152
Installation
Hauser
17