PART TWO - INSTALLATION
SECTION 3 - ELECTRICAL CONNECTIONS
Model P53 pH/ORP Analyzer (universal-mount 1/2 DIN)
Rev. 6-501
26
3.3 Conventional
Combination Electrode
with Ground Rod
3.
Connect a jumper between these TB1 terminals:
Terminals 18 and 20 for analyzers with “B” prefix
serial number (Figure 2-7).
Terminals 18 and 19 for analyzers with “A” or no
letter prefix serial number (Figure 2-8).
4.
Connect the electrode’s temperature element (typically
white and red insulated wires for GLI electrode) to
these “TEMP” terminals on TB1:
Terminals 14 and 16 for analyzers with “B” prefix
serial number, attaching either wire to either termi-
nal (Figure 2-7).
Terminals 14 and 15 for analyzers with “A” or no
letter prefix serial number, attaching either wire to
either terminal (Figure 2-8).
Some applications require that an external ground rod be
used with the combination electrode. The electrode must be
within 100 ft./30 m of the analyzer (985 ft./300 m for elec-
trode with preamp). See Figure 2-9 or 2-10 and directly
connect the electrode’s coaxial cable to the analyzer.
Connect the electrode and temperature element wires in the
same way as described in Section 3.2 --
except eliminate
the jumper wire
. Instead, connect the ground rod wire to
Terminal 18 on TB1.
16 18
14
13
YE
L
L
OW
BL
A
C
K
W
HI
T
E
RE
D
GR
E
E
N
SH
IE
L
D
TB1
20 22
AC
T
IVE
RE
F
GND
TE
M
P
TE
M
P
Figure 2-9 Connecting Conventional Combination
Electrode with Ground Rod to Analyzers with
“B” Prefix Serial Number
Figure 2-10 Connecting Conventional Combination
Electrode with Ground Rod to Analyzers with
“A” or No Letter Prefix Serial Number