PART TWO - INSTALLATION
SECTION 3 - ELECTRICAL CONNECTIONS
Rev. 6-1100
Model P33 pH/ORP Analyzer (panel-mount 1/4 DIN)
25
3.3 Conventional
Combination Electrode
with Ground Rod
1.
Connect the electrode’s reference signal -- braided
shield wire of coaxial cable (black insulated wire for GLI
electrode) -- to “REF” Terminal 10 on TB3.
2.
Connect the electrode’s active signal -- center wire of
coaxial cable (clear insulated wire for GLI electrode) --
to “ACT” Terminal 1 on TB4.
3.
Connect a jumper between “GND” Terminal 9 and
“REF” Terminal 10 on TB3.
4.
Connect the electrode’s temperature element (typically
white and red insulated wires for GLI electrode) to
“TEMP” Terminals 2 and 3 on TB3, attaching either wire
to either terminal.
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). Refer to Figure 2-7 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 connecting Terminals 9 and 10 on TB3
. In-
stead, connect the ground rod wire to “GND” Terminal 9.
FIGURE 2-7
Connecting Conventional Combination Electrode with Ground Rod
