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Electrical Connections
10 4905 Series Conductivity Cells – Installation and Maintenance 12/07
4. Electrical Connections
4.1 Overview
The terminal board connections for the various Honeywell measuring instruments are given in the
appropriate Figures in this section.
To avoid the possibility of AC pickup in the cell leads, separate them from all AC line-voltage wiring or
run them in a separate grounded conduit.
ATTENTION
Do not use shielded cable except where shown in the following figures.
4.2 Instrument Wiring for 4905 Cells with Integral Cable
4.2.1 Model 4905 Series with Integral Cable to UDA2182 Analyzer
NOTES:
1. FOR PURE WATER SAMPLES IN NON -CONDUCTIVE (PLASTIC, GLASS, ETC)
PIPING, GROUND THE BLACK CELL ELECTRODE LEAD NEAR THE CELL.
ALTERNATELY, CONNECT TO THE UDA GROUND SCREW AS SHOWN DOTTED.
DO NOT GROUND 10, 25, OR 50 CONSTANT CELLS
2. FOR CELL LEADS A AND C, USE 16 TO 22 AWG CABLE SHIELDED TWISTED PAIR,
WITH 30pF MAX. CAPACITANCE BETWEEN CONDUCTORS, CONNECT SHIELD TO TERMINAL “10”
3. FOR COMPENSATOR LEADS B AND D, USE 16 TO 22 AWG, TWO CONDUCTOR CABLE
4. CELL TO ANALYZER CABLES ARE CONSIDERED LOW LEVEL. RUN SEPARATE FROM HIGH LEVEL WIRING.
NOTES:
1. FOR PURE WATER SAMPLES IN NON -CONDUCTIVE (PLASTIC, GLASS, ETC)
PIPING, GROUND THE BLACK CELL ELECTRODE LEAD NEAR THE CELL.
ALTERNATELY, CONNECT TO THE UDA GROUND SCREW AS SHOWN DOTTED.
DO NOT GROUND 10, 25, OR 50 CONSTANT CELLS
2. FOR CELL LEADS A AND C, USE 16 TO 22 AWG CABLE SHIELDED TWISTED
WITH 30pF MAX. CAPACITANCE BETWEEN CONDUCTORS, CONNECT SHIELD TO
3. FOR COMPENSATOR LEADS B AND D, USE 16 TO 22 AWG, TWO CONDUCTOR C
4. CELL TO ANALYZER CABLES ARE CONSIDERED LOW LEVEL. RUN SEPARATE F
NOTES:
1. FOR PURE WATER SAMPLES IN NON -CONDUCTIVE (PLASTIC, GLASS, ETC)
PIPING, GROUND THE BLACK CELL ELECTRODE LEAD NEAR THE CELL.
ALTERNATELY, CONNECT TO THE UDA GROUND SCREW AS SHOWN DOTTED.
DO NOT GROUND 10, 25, OR 50 CONSTANT CELLS
2. FOR CELL LEADS A AND C, USE 16 TO 22 AWG CABLE SHIELDED TWISTED PAIR,
WITH 30pF MAX. CAPACITANCE BETWEEN CONDUCTORS, CONNECT SHIELD TO TERMINAL “10”
3. FOR COMPENSATOR LEADS B AND D, USE 16 TO 22 AWG, TWO CONDUCTOR CABLE
4. CELL TO ANALYZER CABLES ARE CONSIDERED LOW LEVEL. RUN SEPARATE FROM HIGH LEVEL WIRING.
NOTES:
1. FOR PURE WATER SAMPLES IN NON -CONDUCTIVE (PLASTIC, GLASS, ETC)
PIPING, GROUND THE BLACK CELL ELECTRODE LEAD NEAR THE CELL.
ALTERNATELY, CONNECT TO THE UDA GROUND SCREW AS SHOWN DOTTED.
DO NOT GROUND 10, 25, OR 50 CONSTANT CELLS
2. FOR CELL LEADS A AND C, USE 16 TO 22 AWG CABLE SHIELDED TWISTED
WITH 30pF MAX. CAPACITANCE BETWEEN CONDUCTORS, CONNECT SHIELD TO
3. FOR COMPENSATOR LEADS B AND D, USE 16 TO 22 AWG, TWO CONDUCTOR C
4. CELL TO ANALYZER CABLES ARE CONSIDERED LOW LEVEL. RUN SEPARATE F
Figure 4-1 Installation Diagram, 4905 Cells, with Junction Box head connected to UDA2182
Analyzer