4905 Style Conductivity Cells Installation and Maintenance Manual 70-82-25-18 Revision 6 Honeywell Process Solutions
Copyright, Notices, and Trademarks Printed in U.S.A. – © Copyright 2007 by Honeywell Inc. Revision 6 – 12/07 While this information is presented in good faith and believed to be accurate, Honeywell disclaims the implied warranties of merchantability and fitness for a particular purpose and makes no express warranties except as may be stated in its written agreement with and for its customer. In no event is Honeywell liable to anyone for any indirect, special or consequential damages.
About This Document Abstract This document is intended to support the installation, operation and maintenance of the 4905 Series of Conductivity Cells. Revision Notes The following list provides notes concerning all revisions of this document. Rev. ID Date Notes 0 12/96 This document is the initial Honeywell release of the L&N manual p/n 177667 Rev. M2. There has been no significant changes made to this manual. The format has been changed to reflect the Honeywell layout.
Contents 1. INTRODUCTION ................................................................................................... 1 1.1 2. SPECIFICATIONS................................................................................................. 3 2.1 Specifications for 04905 Series ...................................................................................................... 3 2.2 Specifications for 276127 Flow Chamber ..........................................................................
Figures Figure 1-1 4905 Type Conductivity Cell Mounted in a 1-1/4” Schedule 80 Tee Using an Adapter Bushing ________________________________________________________________________ 1 Figure 3-1 Typical Conductivity Measuring Installation ______________________________________ 6 Figure 3-2 Dimension Drawing for 276127 Flow Housing ____________________________________ 7 Figure 3-3 Mounting Dimensions for 04905 Series __________________________________________ 8 Figure 3-4 Mounting Dimensions for 04905 Series
vi 4905 Series Conductivity Cells – Installation and Maintenance 12/07
Introduction 1. Introduction 1.1 Overview These cells form the sensing network for industrial analyzers and transmitters designed to make continuous measurements of electrolytic conductivity. The cells are primarily suited to measurements in effluents of ion-exchangers and distillation columns; but appropriate constants are provided for many other applications, including measurements in micro-electronic component washing and plating-rinse effluents.
Introduction The cell constant is selected according to the range of the measuring instrument used and the solution measured. In general, a high-constant cell is used for solutions having low electrical resistance (high conductivity) and a low-constant cell is used for solutions having high electrical resistance (low conductivity). Automatic Temperature Compensation (ATC) during the measurement is provided by a built-in temperature sensing network located near the cross-channel or guard-tube holes.
Specifications 2. Specifications 2.1 Specifications for 04905 Series Parameter Description Cell Constant 04905 Series: 0.01, 0.1, 1.
Specifications 2.2 Specifications for 276127 Flow Chamber Parameter Description Maximum Flow 2 gpm @ 40psig and atmospheric discharge Maximum Pressure 200 psig @ 25°C Maximum Temperature 140°C (284°F) at atmospheric pressure Dimensions 1-1/2” (3.8 cm) octagon x 8-3/4” (22.2 cm) long.
Installation 3. Installation 3.1 Overview The conductivity cell is secured permanently to the 1” N.P.T. bushing which is used for all types of mountings. Although the physical appearance of the various cells is the same (except for length), the cell construction differs according to the constant. On the 10 and 50 constant cells, the electrodes are short tubes located midway inside the two parallel tubular channels that run lengthwise through the cell, and are open to the sample at both ends of the cell.
Installation 3.4 Flow-Type Mounting The cross-channel or guard-tube hole in the cell must always be covered by the solution and the solution level must be 1-1/2 inches above these holes. When mounting the cell in a pipe tee such as shown in Figure 3-1, have the solution enter the tee from below and exit to the side. As shown, the guard-tube hole is in line with the horizontal pipe run.
Installation 3.6 Insertion-Type Mounting The cell can be inserted into a 1” N.P.T. threaded opening, but it is imperative that the tank or chamber be full under all process conditions. Make certain the liquid head is above the cell location. A vertical insertion (from above) or a horizontal insertion can be used. To install, simply tighten the cell into a 1” N.P.T. threaded opening (using a Teflon thread compound such as Teflon tape) so that the entire electrode is immersed in the measured solution.
Installation “X” See Table Cell Constant X" Approx. 5.4" 5.4" 5.4" 5.8" 6.9 001 0.1 1 10 50 1.687" (42.8mm) mm 138 138 138 146 175 1" NPT 0.940" (24mm) Dia Cell cable is approx. 0.250” (6.4 mm) O.D. max with 4 conductors of #18 AWG wire. 1.5" (38mm) Octagon Figure 3-3 Mounting Dimensions for 04905 Series "X" See Table Cell constant X" Approx. 001 5.4" 5.4" 0.1 1 5.4" 510 4.5" 5.8” 10 50 6.9” 5.8" 20 6.0" 25 6.9" 50 6.9" 5.
Installation 26AWG CONDUCTORS WITH .02 (0,6) DIA. FERRULES CABLE CONNECTOR WILL PASS THRU A 0.625(15,9) MIN. DIA PIPE OR CONDUIT OPENING QUICK DISCONNECT COAX ELECTRODE CABLE APPROX. 0.270(6,8) DIA. CABLE LENGTHS AVAILABLE: 2, 3, 6, 15 METERS MAX. TEMP. = 70 DEG. C (158 DEG.
Electrical Connections 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.
Electrical Connections 50 FT. MAX. WIRE. 20 FT. OR 50 FT. CABLE LENGTH. Direct Cell to Analyzer Installation 50 FT. MAXIMUM 4905 4800 SERIES SERIESCONDUCTIVITY CONDUCTIVITYCELL CELL Cell to Analyzer through Junction Box 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.
Electrical Connections 4.2.
Electrical Connections 4.3 Instrument Wiring for 4905 Cells with Quick Disconnect Cable 4.3.1 Wiring Model 4905 with Quick Disconnect Cable to UDA2182 Wire Color Signal name Yellow 10 Cell Low 9 8 Coax 7 Cell High 6 RTH 3rd Wire Green Red 5 RTH Low 4 RTH High Brown Blue Wire to chassis ground screw 3 2 1 Earth Ground Figure 4-4 Wiring Diagram for 4905 Cells with Quick Disconnect Cable Connected to UDA2182 Analyzer YELLOW COAX 4.3.
YELLOW COAX Electrical Connections Note: Ignore black and blue wires.
Maintenance 5. Maintenance 5.1 Introduction If abnormal readings occur, this may indicate poor response because the cell is not filled with process solution. Check the cell installation. Note that a grayish dull surface on the cell plastic (normally glassy) can result from exposure to temperatures above 140°C. The only maintenance which may be required is occasional cleaning in certain applications. Cell constants 0.01, 0.
Maintenance 5.4 Platinizing the Cell Electrodes Only the electrodes having constants 10 and 50 must be replatinized if the velvety-black deposit has been rubbed off the electrodes in service or in cleaning or if platinized electrodes are recommended and this black deposit is not present when the new cell is received. Always replatinize if a brush was used in cleaning the electrodes.
Replacement Parts and Accessories 6. Replacement Parts and Accessories Description Flow Cell Housing, PES Junction Box Part Number 276127 31316260 Legacy updates cap 50028816-001 Extension Cables for Sensors with Quick Disconnect Option 2m (6.56 ft) 50024092-001 3m (9.84 ft) 50024092-002 6m (19.69 ft) 50024092-003 15m (49.
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