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Electrical Connections
10 Installation and Maintenance Manual 10/07
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 4973 Cells with Integral Cable
4.2.1 Model 4973 Series with Integral Cable to UDA2182 Analyzer
Figure 4-1 Installation Diagram, 4973 Cells, with junction box head connected 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. ALTERNATIVELY, CONNECT TO THE UDA
GROUND SCREW AS SHOWN DOTTED. DO NOT GROUND 10, 25, OR 50 CONSTANT CELLS.
2. FOR CELL LEADS BLACK AND WHITE, USE 16 TO 22 AWG CABLE, SHIELDED TWISTED PAIR,
WITH 30 pF MAX. CAPACITANCE BETWEEN CONDUCTORS. CONNECT SHIELD TOTERMINAL
“10”. FOR MODEL 4973 INSTALLATIONS WITH HONEYWELL 31079198 SS FLOW CHAMBER, USE
22 AWG MINIMUM COAXIAL CABLE TYPE RG59U (BELDEN 9259 OR EQUIV.). CONNECT COAX
SHIELD TO TERMINALS “A” AND “10”. CONNECT COAX CONDUCTOR TO TERMINALS “C” AND “7”.
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.
DRAWING 50012874