Honeywell 4908-4909 plastic assembly instruction

4909 CPVC Conductivity Cell

Insertion/Removal Assembly

Operations Manual

70-82-25-19

Rev. 1

7/99

Copyright, Notices, and Trademarks

Printed in U.S.A. – © Copyright 1999 by Honeywell Inc.

Revision 1– 7/99

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. The information and specifications in this document are subject to change without notice.

ii

Honeywell

Industrial Automation and Control

Automation College

2820 West Kelton Lane

Phoenix, AZ 85023

(602) 313-5669

4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual 7/99

About This Document

Abstract

The purpose of this document is to support the installation operation and maintenance of the 4909 CPVC

Conductivity Cell Removal/Insertion Assembly.

Revision Notes

The following list provides notes concerning all revisions of this document.

Rev. ID

0

1

Date

11/96

6/99

Notes

This revision is the initial release of the Honeywell version of the L&N manual p/n 277731 Rev. E1. There were no major changes to the L&N version when it was Honeywellized.

Edits were made to standardize terminology and to add the new Model

Selection Guide.

References

Honeywell Documents

The following list identifies all Honeywell documents that may be sources of reference for the material discussed in this publication.

Document Title

9782 Series Conductivity/Resistivity Analyzer/Controller Operator’s Manual

7079-17 Two-Wire Transmitter for Conductivity/Resistivity Operation and

Maintenance Manual

ID #

70-82-25-74

70-82-25-51

Non-Honeywell Documents

The following list identifies select non-Honeywell documents that may be sources of reference for the material discussed in this publication.

Title Author Publisher ID/ISDN #

Contacts

The following list identifies important contacts within Honeywell.

7/99 4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual iii

Organization

Honeywell TAC

Telephone

1-800-243-9883 Voice

Address

1100 Virginia Drive

Fort Washington, PA 19034

iv 4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual 7/99

Contents

1.

INTRODUCTION....................................................................................................1

1.1

Overview.........................................................................................................................................1

1.2

4908 Conductivity Cell ...................................................................................................................1

1.3

31074357 Removal Device............................................................................................................2

2.

SPECIFICATIONS AND MODEL SELECTION GUIDE .........................................7

2.1

Specifications..................................................................................................................................7

Cell Constants....................................................................................................................................7

Electrode Material .............................................................................................................................7

Wetted Parts.......................................................................................................................................7

Pressure and Temperature (See Fig. 1-1) ..........................................................................................7

Maximum Pressure ............................................................................................................................7

Mounting ...........................................................................................................................................7

Purge Port ..........................................................................................................................................7

Insertion Depth ..................................................................................................................................7

Electrical Connections.......................................................................................................................7

Integral Automatic Temperature Compensation ...............................................................................8

Leadwire ............................................................................................................................................8

Weight ...............................................................................................................................................8

2.2

Model Selection Guide ...................................................................................................................8

...........................................................................................................................................................8

3.

INSTALLATION ...................................................................................................11

3.1

Requirements ................................................................................................................................11

3.2

Location and Position ...................................................................................................................11

Considerations .................................................................................................................................11

3.3

Prepare Assembly .........................................................................................................................12

Initial Prep .......................................................................................................................................12

Mounting into the Process ...............................................................................................................12

3.4

Insertion ........................................................................................................................................13

3.5

Removal ........................................................................................................................................14

3.6

Electrical Connections ..................................................................................................................14

7/99 4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual v

4.

MAINTENANCE AND REPLACEMENT PARTS .................................................17

4.1

To Clean The Cell.........................................................................................................................17

4.2

Replacing Removal Device Parts..................................................................................................17

Ball Valve ........................................................................................................................................17

Nipples.............................................................................................................................................17

Bushing And Washer.......................................................................................................................17

4.3

Replacement Parts.........................................................................................................................18

5.

PLATINIZATION AND PLATINUM BLACK .........................................................19

vi 4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual 7/99

Tables

Table 4-1 Replacement Parts __________________________________________________________ 18

Table 4-2 Voltage and Time Limits for Platinizing Cells ____________________________________ 18

Figures

Figure 1-1 Temperature/Pressure* Range__________________________________________________ 2

Figure 1-2 4909 CPVC Conductivity Cell Insertion/Removal Assembly with Conductivity Cell Installed3

Figure 1-3 4909 CPVC Conductivity Cell Insertion/Removal Assembly with Universal Head_________ 3

Figure 1-4 4908 Conductivity Cell _______________________________________________________ 4

Figure 1-5 31074357 Removal Device ____________________________________________________ 4

Figure 1-6 Universal Head _____________________________________________________________ 5

Figure 3-1 Outline and dimension drawing for 4909-X-X-X-X-03-X-X Conductivity Cell, Insertion Type with CPVC Removal Device _______________________________________________________ 15

Figure 3-2 Outline and Dimension drawing for 4909-X-X-X-X1-03-X-X Conductivity Cell, Insertion

Type with CPVC Removal Device and Universal Head __________________________________ 16

Figure 5-1 Installation Diagram-Cat. 4909 Cells with Junction Box Head Connected to 7082

Conductivity/Resistivity Analyzer ___________________________________________________ 20

Figure 5-2 Installation Diagram-Cat. 4909 Cells with Junction Box Head Connected to 9782


Figure 5-3 Installation Diagram-Cat. 4909 Cells with 7 or 20 Foot Leads Connected to 7082


Figure 5-4 Installation Diagram-Cat. 4909 Cells with 7 or 20 Foot Leads Connected to 9782


7/99 4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual vii

Introduction

1. Introduction

1.1 Overview

The 4909 Conductivity Cell Insertion/Removal Assembly is designed for use in a pipeline or closed vessel where it is desirable to remove the cell for inspection and maintenance without shutting down the system and releasing the pressure. The assembly comprises a 4908 Conductivity Cell and a 31074357 Removal

Device which are shown assembled in Figs. 1-2 and 1-3. It is to be used in applications for which maximum pressure does not exceed 125 psig, and can be reduced to 50 psig during insertion and removal of the cell. Maximum operating temperature is determined by the temperature compensator range. Do not use in solutions above 80

°

C.

The depth of insertion is given in Figs. 3-1 and 3-2.

The conductivity cell is made of polyethersuflone (PES), which is resistant to most corrosive inorganic chemicals over a wide range of temperatures (common exceptions are chlorinated hydrocarbons and ketones). Sample solutions come into contact with the PES and the platinum or nickel electrode surface of the cell. (Any cell constant can be supplied with either electrode material). The only materials of the 4909

Assembly with which the sample solution may come into contact are in the removal device which is comprised of CPVC plastic, Teflon, EPDM and Viton materials. The automatic temperature compensator may be built into the cell as shown in Section 2.2, Model Selection Guide.

CAUTION

Specific parameters of your process may prohibit the use of nickel electrodes. For example, always use a platinum cell (Table II = 44) if the cell will measure or be exposed to regeneration acids or bases.

1.2 4908 Conductivity Cell

The molded conductivity cell and its one-inch diameter by 3-inch long adapter comprise a one piece cell unit and are made of polyethersulfone (PES). This adapter serves as a stop during the removal operation.

The cell can be supplied with a two, three or four conductor, Tefzel-sheathed cable, Fig. 1-2. Either of two different lengths of cable can be furnished as specified in the Model Selection Guide (MSG) number, see

Section 2.2, Model Selection Guide. Or the insertion/removal assembly can be supplied with a Universal

Head, Fig. 1-3.

The cells having constants of 5, 10, 20, 25 or 50 cm

-1

are intended for making measurements in highly conductive solutions. They differ in construction from those having constants of 0.01, 0.1, or 1. On the 5 to 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. The channels are larger on the 25 constant cell and they are elliptical on the 5 and 10 constant cell. The 0.01, 0.1, and 1.0

constant cells have a removable cell guard which is screwed onto the cell body to protect the electrode surfaces. Cells with a guard tube must be used with the guard in place or the cell constant may differ from that specified. Electrodes are three discs on the 1 constant cell, parallel plates on the 0.1 constant cell, and a pair of concentric wires wound on the cell body on the 0.01 constant cell.

7/99 4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual 1

4909 CPVC Conductivity Cell Insertion/Removal Assembly Operations Manual

1.3 31074357 Removal Device

This device consists of a ball valve which is connected to the closed system by a 1-1/2 inch CPVC schedule

80 mounting nipple and to a housing by a 6 inch long schedule 80 CPVC nipple into which the support tube for the cell mounting is inserted. The compression handle provides a seal around the cell support tube.

Depending on the Key Number selected in Section 2.2, MSG, the 31074357 Removal Device may or may not include the 4908 Cell preinstalled in the device.

If Key Number 04908 is selected, the 4908 Cell (Fig. 1-4) is shipped apart from the removal device.

If Key Number 04909 is selected, the 4908 Cell is preinstalled into the removal device, Fig. 1-3. Details of each type of installation are given in Section 3.3.

130

80

70

60

50

40

30

120

110

100

90

20

10

0

-10 -5 0 10 60 70 80 20 30 40

DEGREES CELSIUS

50

a/n 23349

Figure 1-1 Temperature/Pressure* Range

* 50 psig max. during insertion or removal of 4908 cell.

2 4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual 7/99

Introduction

Conductivity Cell

Valve

Purge Port

1/4" NPT Plug

Compression Handle

Support Grip

6" Nipple

1-1/2" NPT Nipple

Housing

Adapter (Contains Automatic Temperature Compensator when Specified)

Cable

Cable Grip a/n 23350

Figure 1-2 4909 CPVC Conductivity Cell Insertion/Removal Assembly with Conductivity Cell Installed

Universal Head Assembly a/n 23351

7/99

Figure 1-3 4909 CPVC Conductivity Cell Insertion/Removal Assembly with Universal Head

4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual 3


Conductivity

Cell

Adapter *

* Automatic Temperature Compensator,

when specified by catalog number, is

mounted inside adapter.

Cable

a/n 23352

Figure 1-4 4908 Conductivity Cell

Do not nick outside of support tube

Note: Apply a thin film of Silicone grease to all surfaces of bushing and to diameter of support tube as shown.

Apply grease

(See Note above)

Modify per sketch*

Tighten securely to pipe

Apply teflon tape to both ends of support tube. Tighten all pipe thread fittings two turns beyond hand tight.

4

These parts should be hand-tightened only

*

Slice through one side as shown

Compression

Bushing

Figure 1-5 31074357 Removal Device

4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual

a/n 23353

7/99

Introduction

Nipple (3/4" NPT)

Set Screw

Base

#6-32 Screw

Wire

Gasket

Cap

#6-32

Binding Head

Screw &

Washer

#6-32 Screw

Chain

A

B

D

C

Terminal

Board

Assembly

View of Base with Cap Removed

O

C

D

N

C

U

IV

T

Y

IT

E

C

L

L a/n 23354

Figure 1-6 Universal Head




Specifications and Model Selection Guide

2. Specifications and Model Selection Guide

2.1 Specifications

Cell Constants

0.01, 0.1,1.0, 5, 10, 20, 25 and 50 cm

-1

.

Electrode Material

Nickel or Platinum, as specified.

Wetted Parts

Cell Body: Polyethersulfone (PES).

Mounting Materials: Chlorinated Polyvinyl Chloride (CPVC).

Internal Sealing Materials: Viton, Teflon & EPDM

Pressure and Temperature (See Fig. 1-1)

125 psig (862 kPa) max. @ 23

°

F (-5

°

C)

90 psig (621 kPa) max. @ 122

°

F (50

°

C)

50 psig (345 kPa) max. @ 176

°

F (80

°

C)

Maximum Pressure

During Insertion or Removal: 50 psig.

Mounting

1-1/2” NPT male pipe. Overall length of removal device: approximately 20 or 22 inches (allow additional clearance for cell withdrawal). See Figs. 3-1 and 3-2.

Purge Port

1/4” NPT female opening.

Insertion Depth

Varies between 4.5” and 6.8” nominal, depending upon cell constant. Greater insertion depths are optional.

See Figs. 3-1 and 3-2.

Electrical Connections

Three leads with integral automatic temp. compensator. Two leads without integral automatic temp.

compensator. Four leads with integral automatic temp. compensator)Table III = 333).



Integral Automatic Temperature Compensation

Refer to Section 2.2 – Model Selection Guide

Leadwire

Tefzel covered, 18-gage cable (7 feet, 20 feet, or Universal Head, as specified).

Weight

Approximately 3.5 lb (1.6 Kg) (including cell).

2.2 Model Selection Guide

KEY NUMBER

Description

04909 Complete Conductivity Cell Assembly

04908 Replacement Cell Only

TABLE I

Cell Constant

TABLE II

Electrode Material

TABLE III

Automatic Temperature Compensator (ATC)

No Temperature Compensator

Available for 9782 and 7082 Only

Nickel

Platinum

(Note 2) (Note 3)

(Note 1) (Note 3)

0.01

0.1

1

5

10

20

25

50

Selection Availability

04909

04908

001

X01

XX1

XX5

X10

X20

X25

X50

g g g g

Available for 7079C Transmitter or already withdrawn analytical instrumentation. (Refer to Tables 1 and 6 under Steps to Selecting

Appropriate Conductivity Instrumentation & Cells for available

Temp. Compensator/Conductivity range.)

33

44

074

088

090

091

093

113

114

160

164

168

000

333

009

013

014

071

072

073

f f


Specifications and Model Selection Guide

TABLE IV

Leadwire Length ’7 ft. Leadwire

20 ft. Leadwire

Junction Head (Aluminum)

TABLE V

Valve/Cell Material

4909 Stainless Steel (SS) Valve

Assembly

4908 PES Replacement Cell for

4909 SS Valve Assembly

4909 CPVC Valve Assembly

Material

Includes SS Valve assembly and

Standard insertion cell

Standard insertion cell only

Includes CPVC assembly and standard CPVC Support tube

(15 3/8") and cell

Cell only 4908 PES Replacement Cell for

CPVC Valve Assembly

TABLE VI

Special Mounting Options - select one option per unit

None

SS support tube for 4909 SS Valve assemblies only. Use Table V

Option = 02

4908 replacement cells for 4909 SS

Valve Assembly containing SS Support tube. Use Table V Option = 02

Special insertion lengths for new/ replacement cells for 4909 SS

Valve Assemblies. Only available for Table V Option = 02

Uses special insertion cell to increase standard insertion cell depth by 4.4"

Uses special insertion cell to

Extended Length CPVC Support tube.

Only available for Table V Option = 03 increase standard insertion cell depth by 8.8"

(Note 4)

Uses special insertion cell to increase standard insertion cell depth by 13.2"

(Note 4)

Uses special insertion cell to decrease standard insertion cell depth by 4.4"

Supplies special CPVC support tube (21 3/8") to increase cell insertion depth by 6.0" in a new CPVC Valve

Assembly. Note: Allow additional 6.0" for cell removal

049

Selection

09 08

X7

20

X1

02

02

03

03

000

930

930

910

920

925

940

950

c d e j c d e h h h h



049

TABLE VII - OPTIONS

Tagging

Certificate of Calibration

None

Linen

Stainless Steel

No

Yes

0_

L_

S_

_ 0

_ 1

Notes:

1. Replacement cells only, caution look at Restrictions for insertion depth dimensions based on valve assembly type.

2. When converting from 4806 to 4909, order 4908 directly.

3. Replacement 4908 cells for existing 4908’s and 4909’s manufactured before 8/85 must specify Table V = 02.

4. This option is application sensitive. You must contact Analytical Instruments Marketing for approval.

RESTRICTIONS

Restriction Letter c

Table

Available Only With

Selection Table

Not Available With

Selection

V Standard insertion cell for SS valve assemblies consists of a conductivity cell of variable length based on the cell constant and a 13.2" PES tube molded to the cell. The conductivity cell insertion depth is listed below:

d e f g h j

V

III

V

V

001, X01, XX1 = 7.5"

XX5 = 6.5"

X10 = 7.7"

X20 = 8.0"

X25, X50 = 8.8"

V Standard conductivity cell insertion depth dimensions according to cell constants for CPVC assemblies is listed below:

001, X01, XX1 = 5.5"

XX5 = 4.5"

X10 = 5.7"

X20 = 6.0"

X25, X50 = 6.8"

02

For 9782 and 7082 Analyzers only

02

03

I

I X25, X50

Not for 9782 and 7082 Analyzers


Installation

3. Installation

3.1 Requirements

To insure that a representative sample is being measured at all times, the solution must move through and completely purge out the cell channels or guard tube. If the measurement is made in a rapidly moving liquid, the existing circulation of the solution can be utilized by mounting the assembly as described in the next section so that the flow of the solution forces liquid through the cell. However, when measurements are to be made in quiescent solutions, means must be provided for forcing the solution through the conductivity cell so no air bubbles accumulate or care taken to place the cell in a position to measure the true value of the solution.

Do not use the cells in solutions which will attack the fittings used or the wetted cell materials. The PES and platinum or nickel of the electrode are the cell materials with which the solution will come into contact.

The wetted materials of the removal device with which the process may come into contact with are CPVC,

Teflon, EPDM and Viton.

Do not use the cell in a solution having temperatures greater than 80

°

C. The maximum limit set by the temperature compensator range must be observed.

For cells having a constant of 0.01, 0.1 or 1, make certain that the guard is in place and is not loose on the cell body. The guard tube must be hand-tightened only. There is a 1/16 inch space between the guard tube and the cell body.

Do not install the 4909 Assembly where pressures and/or temperatures may occur outside the operating range given in Fig. 1-1. Both pressure and temperature must be within the shaded area of the curve.

Avoid installations where the 4909 Assembly will be exposed to pressure shock caused by water hammer.

3.2 Location and Position

Refer to Fig. 3-1 or Fig. 3-2 for mounting dimensions.

Considerations

The cross-channel in the high constant cells or the guard tube holes in the low constant cells must be covered by the solution during measurements.

Vertical insertion (from above) or horizontal insertion can be used. Make certain the tank or pipeline is full under all process conditions. If a pipeline is not always full, use a vertical mounting and insert the cell far enough into the vertical pipe that the cross-channel is below the horizontal exit pipe which may empty out.

Make certain an air bubble in the pipe does not prevent the cell from filling properly. (If the cell becomes dry after use, it may require cleaning in accordance with Section 4.1 before again being placed in service.)

For best results, whether vertical or horizontal mounting is used, position the cell so that the sample will flow through the channels or guard tube towards the mounting end of the cell, exiting through the crosschannel or guard-tube holes. In applications where vertical mounting is required, avoid a position with the cell channels pointed up, as this will permit solution to flow down into the open end of the cell and may result in clogging by solids settling in the cell channels.

Allow for insertion depth from the outside wall of the mounting surface as indicated by the dimensions in

Fig. 3-1 or 3-2.



Allow at least 1/2 inch clearance beyond the end of the cell and 1/8 to 3/16 inch radius clearance surrounding the cell to permit circulation of the solution.

Avoid locations where excessive temperature changes may occur.

Allow clearance behind the support grip to permit removal of the cell per dimensions in Fig. 3-1 or 3-2.

Locate the insertion/removal assembly on the pressure side of pumps; not the vacuum side.

Avoid locations where the operator must take an awkward position to perform the cell insertion or removal operation.

The 4909 Insertion/Removal Assembly is designed to support only its own weight. Do not install in locations where it would be used as a foot rest or where it would be used as a hand grip. Do not hang or support any other piping or objects from the assembly.

The removal device should not be mounted onto pipelines or vessels displaying excessive vibration unless a support is provided on the 6” long valve nipple.

3.3 Prepare Assembly

If X7 or 20 are selected in Table IV of the Model Selection Guide, then the 4908 Conductivity Cell (Fig. 1-

4) must be joined with the support tube of the 31074357 Removal Device as discussed in Section 1.3.

Refer to Fig. 1-5.

Initial Prep

1.

Loosen compression handle by turning it counterclockwise until it is free from housing.

2.

Withdraw the support tube, bushing, washer and handle assembly keeping the bushing and washer in place on the support tube. When greater insertion depth of the conductivity cell into the process solution is desired, p/n 074344 Support Tube will give an additional 6 inches immersion beyond the standard depth. See Figs. 3-1 and 3-2. If 074344 Support Tube is to be used, it must be secured to the support grip.

3.

Slide the bushing and washer off of the standard support tube.

4.

Turn the compression handle counterclockwise to remove it from the support grip.

5.

Using a strap wrench, loosen and remove the standard support tube.

6.

Install 074344 Support Tube by wrapping one end with Teflon tape overlapping by 50% on each wrap.

Wrap the tape in a clockwise direction as viewed from the threaded end of the support tube.

7.

Thread this end into the support grip by hand and tighten an additional two turns by using a strap wrench. Do not use stillson or chain type wrenches as they may damage or score the support tube and prevent a good seal with the bushing.

8.

Replace the compression handle, washer and bushing removed earlier. Note the proper orientation of the bushing with the tapered surface facing away from the compression handle.

Mounting into the Process

The valve nipples and housing can now be mounted into the process pipeline or tank wall.

1.

Remove the protective cap and apply Teflon tape to mounting nipple. Wrap the tape on the threads in a clockwise direction as viewed from the threaded end. Overlap the tape by 50% on each wrap. Cover the threaded area twice in this manner.

2.

Install the mounting nipple and valve assembly hand tight.


Installation

3.

Using a strap wrench on the mounting nipple, tighten the assembly an additional 1-1/2 to 2 turns. Do not use stillson or chain type wrenches as they may damage and weaken the CPVC plastic. Do not use the valve handle for leverage.

4.

Close the ball valve; handle perpendicular to valve.

A purge port is provided on the removal device housing. Water or some other fluid source can be piped to this port for the purpose of cleaning out the valve assembly from accumulated debris. For most conductivity applications, the process stream will not have high particle content and the purge port is not used.

If purging is required remove plug and install a purge line to the ¼” NPT opening. Note that the purge fluid temperature and pressure must not exceed the 4909 Assembly temperature and pressure specifications as shown in Fig. 1-1. Also, the purge line must have a shutoff valve located near the removal device.

Another use for the purge port can be realized if a pressure gage is installed in the ¼” NPT opening. It will serve as a local indication of process pressure to confirm that the pressure is below 50 psig during insertion or removal of the cell.

Make sure the bushing and washer are in place on the support tube, then feed the cable of the 4908

Conductivity Cell through the support tube and turn the tube hand tight onto the conductivity cell. Using a strap wrench, tighten the 4908 Cell an additional 1-1/2 to 2 turns. Do not score or gouge the support tube surface because the bushing makes a seal on the tube surface.

Tighten the cable grip to provide strain relief from the cell cable.

If X1 is selected in Table IV of the Model Selection Guide, then the 4908 Conductivity Cell has been premounted by Honeywell onto the support tube. Also cable wiring to the universal head terminal board has been completed. The valve assembly can then be mounted to the process by following steps under

“Mounting into the Process” mentioned earlier.

3.4 Insertion

1.

Make sure the bushing and washer (Fig. 1-5) are in place on the support tube. A thin film of silicone grease is applied at the factory to the bushing and to the support tube area covered by the compression handle. If this film has been wiped off or if dirt or grit is present, clean these areas and reapply a new film of silicone grease (p/n 090011, 0.3 oz. tube).

2.

Obtain the cell and support tube assembly prepared earlier. Separate the compression handle from the support grip by turning the support grip counterclockwise approximately two turns. Slide the compression handle along the support tube until the bushing and washer are sandwiched between the handle and 4908 Cell Adapter.

3.

Slide the cell and tube assembly into the removal device housing and tighten the compression handle clockwise until drag is felt on the tube. This can be determined by rotating the tube by hand.

4.

REDUCE PROCESS PRESSURE TO 50 PSIG OR LESS. Open the ball valve; handle parallel to valve.

5.

Push the cell and support tube assembly all the way in using the support grip.

6.

Tighten the support grip by turning clockwise two turns.

7/99

ATTENTION

This step is important to prevent blow-back of cell and support tube assembly. The bushing acts as a safety stop against the cell adapter if the support tube does blow back.

7.

Return the process to normal operating pressure.

8.

Further tighten the compression handle if leakage occurs from the bushing seal area.

4909 CPVC Conductivity Cell Insertion/Removal Assembly– Operations Manual 13


3.5 Removal

1.

REDUCE PROCESS PRESSURE TO 50 PSIG OR LESS. Shut off purge line, if used. Disconnect wiring connections if X1 is selected for Table IV in the MSG.

2.

DO NOT STAND BEHIND THE TUBE WHEN PERFORMING THIS STEP. While holding the compression handle from turning, turn the support grip two turns counterclockwise. Loosen the compression handle until the process pressure pushes the cell and support tube assembly out to its internal stop. If necessary, pull out by hand until stop is reached.

3.

Close the ball valve. If the valve does not close easily, make sure the support tube is pulled all the way back.

4.

Completely loosen the compression handle to withdraw the cell.

3.6 Electrical Connections

The terminal board connections for recorder or analyzer are given in the appropriate directions furnished with the measuring instrument.

When the cell assembly includes a built-in temperature compensator, all leads are used. The cell is connected between black and white and the compensator is between red and white, except when MSG Table

III=333. In this case, the built-in temperature compensator is between red and green. See Figs. 5-1 and 5-2 when wiring cells with MSG option=333.

To avoid the possibility of ac pick-up in the cell leads, separate them from all AC line voltage wiring or run them in a separate grounded conduit.

Cells are available with leadwire up to 20 feet as specified in the MSG assembly. For distances greater than

20 feet, use the required length of cable and a junction box, both listed in Section 4.3. For assemblies supplied with a Universal Head, Fig. 3-2, a junction box is not required.


Installation

X "

See Below

* Standard Insertion Depth

Table I

X" Approx.

mm

001

0 1

5.5

5.5

140

140

1

5

5.5

140

114

1 0

20

4.5

5.7

6.0

145

152

25

50

6.8

6.8

173

173

Approx 4.1"

(105mm)

Approx 12.5"

(317mm)

Approx 19.7" max.

(502mm)

1/4" NPT

Purge connection. Do not exceed Temp./Press.

specifications of removal device

Allow a minimum clearance of 36"

(914 mm) beyond this point for removal of electrode.

Allow 42" (1067mm) if alternate support tube is used.

2.5"

(64mm)

* Add 6" (152 mm) to

Dimensions if 074344

Support Tube is Used.

0.940"

(24mm)

Dia

Temp.

Comp.

1 1/2 NPT

Schedule 80 Nipple

RED

WHITE

Cell

BLACK

Linear Micromho,

Resistivity, or

Concentration Ranges

RED

Shunt

Comp.

WHITE

Series

Comp.

Cell

BLACK

Non-Linear

Micromho Ranges

Cell

WHITE

BLACK

Without Temp.

Compensation

RED

Temp.

Comp.

GREEN

WHITE

Cell

BLACK

Linear Ranges

Electrode Cable, approx 0.25" (6.4mm)

O.D. max with 2, 3, or

4 conductors of

#18 AWG wire a/n 23355

Figure 3-1 Outline and dimension drawing for 4909-X-X-X-X-03-X-X Conductivity Cell,

Insertion Type with CPVC Removal Device



X "

See Below

* Standard Insertion Depth

Suffix A

001

0 1

1

5

X" Approx.

5.5

5.5

5.5

4.5

mm

140

140

140

114

1 0

20

5.7

6.0

145

152

25

50

6.8

6.8

173

173

Approx 4.1"

(105mm)

Approx 12.5"

(317mm)

Approx 19.7" max.

(502mm)

2.5"

(64mm)

1/4" NPT

Purge connection. Do not exceed Temp./Press.

specifications of removal device

* Add 6" (152 mm) to

Dimensions if 074344

Support Tube is Used.

0.940"

(24mm)

Dia

RED

Temp.

Comp.

WHITE

Cell

BLACK

Linear Micromho,

Resistivity, or

Concentration Ranges

1-1/2" NPT

Schedule 80 Nipple

RED

Shunt

Comp.

WHITE

Series

Comp.

Cell

BLACK

Non-Linear

Micromho Ranges

WHITE

Cell

BLACK

Without Temp.

Compensation

Cell Wiring

1/2" female NPT for user’s flexible electrical conduit connection. For insertion or removal of cell, disconnect conduit connections.

RED

Temp.

Comp.

Cell

GREEN

WHITE

BLACK

Linear Ranges

(Table III = 333)

Allow a minimum clearance of 36"

(914 mm) beyond this point for removal of electrode.

Allow 42" (1067mm) if alternate support tube is used.

3"

(76mm) a/n 23346

Figure 3-2 Outline and Dimension drawing for 4909-X-X-X-X1-03-X-X Conductivity Cell,

Insertion Type with CPVC Removal Device and Universal Head


Maintenance and Replacement Parts

4. Maintenance and Replacement Parts

If a series of below normal conductivity readings or above normal resistivity readings occur, this may indicate that the cell is not filled with process solution. Check the cell installation. Refer to Sections 3.1

and 3.2.

The only maintenance which may be required is occasional cleaning in certain applications. The 0.01, 0.1, and 1.0 cm

-1

low constant electrodes are not platinized.

4.1 To Clean The Cell

CAUTION

The cell assembly is PES (polyethersulfone). Do not clean with acetone, chloroform, toluene, benzene, or any chlorinated hydrocarbon.

The cell will require cleaning if sludge, slime, etc., accumulates in the flow channels. Since the materials of construction are chemically inert, chemical agents may be used and are recommended for cleaning the cells.

The particular cleaning agent used must be selected according to the type of contamination to which the cell is exposed. In general, soap and hot water cleaning solution is effective. Immerse the plastic body of the cell in this solution. A 10 or 15 minute soaking period should be adequate. If necessary, a soft bristle brush of appropriate diameter may be used to clean out the tubular channels of the 5, 10, 20, 25 and 50 constant cells. Care must be taken not to scratch the electrode surfaces. Do not use a brush on the low (0.01, 0.1

and 1) constant cells and be especially careful not to bend the electrode plates of the 0.1 constant cell.

Rinse the cell thoroughly in tap water and then in distilled water if available. To remove the platinum black from electrodes (5 to 50 constants only), refer to Section 5. Replatinizing after each cleaning (5 to 50 constant cells only) may not be necessary unless brushing was used.

4.2 Replacing Removal Device Parts

Ball Valve

If a new ball valve is installed, orient the valve body so that the heavy walled end is toward the process connection for added support strength. See Teflon tape note below.

Nipples

If nipples are replaced, use exact replacement to ensure pressure and temperature ratings, proper immersion length and proper operation of removal device.

Use only Teflon tape on all valve, nipple and support tube pipe threads. Other liquid or paste sealants may contain solvents that weaken the CPVC material.

Bushing And Washer

Replace these parts if swollen, cracked or damaged in a way that prevents a good seal on the support tube.

Lightly grease the new bushing with silicone grease before installing.

Note that the support grip must be removed from the support tube before replacing the bushing and/or washer. Orient the bushing so that the tapered surface faces away from the compression handle, Fig. 1-5.



4.3 Replacement Parts

Table 4-1 Replacement Parts

Description

Complete Assembly

Cell Assembly

Complete CPVC Removal Device

Universal Head Parts

Part Number

See Figs. 1-5 and 1-6

Cat. 4908

31074357

See Fig. 1-6

Platinizing Solution (3 oz. bottle)

Cell Guard Tube (0.01, 0.1, and 1.0 Constants Only)

Support Tube, 1/2” NPT Sch. 80, CPVC (12” Immersion)

Support Tube, 1/2” NPT Sch. 80, CPVC (6” Immersion)

Junction Box

Cell Extension Leadwire (Table III other than 333)

Three conductor 18 gage cable PVC (105

°

C max.)

Three conductor 18 gage cable Tefzel (150

°

C max.)

9782/7082 Standard Ranges

Up to 500 ft.

Three conductor, 18 gage cable (Belden 9493)

and Coax Cable (Belden 9259)

Up to 1000 ft

Four conductor (3 used), 16 gage cable,

Belden 9494 or equivalent and Coax Cable (Belden 9259)

9782/7082 Wide Ranges

Up to 500 ft - Four Conductor, 18 gage

Up to 1000 ft - Four Conductor, 16 gage

31103011

065602

074344

074343

31316260

834059

834086

834059

835024

834055

835024

31834052

834055

Table 4-2 Voltage and Time Limits for Platinizing Cells

Cell Constant

DC Voltage 5 10 20 25 50

1.5

3.0

6.0

12.0

----

200 sec

80 sec

----

----

240 sec

100 sec

----

----

----

180 sec

120 sec

----

----

200 sec

150 sec

----

----

300 sec

240 sec


Platinization and Platinum Black

5. Platinization and Platinum Black

Only the electrodes having constants from 5 to 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 cell is received. Always replatinize if a brush was used in cleaning the electrodes. The indication of a need for replatinization of the electrodes is a long term drift of the measuring instrument caused by an apparent increase in cell constant as the platinum black coating is depleted from the electrode surfaces. The electrodes of the high constant cells are not visible since they are located near the middle of the flow channels. Therefore the need for platinization is only indicated by the effect on the measuring instrument. Do not platinize cells intended for measuring high purity water.

Before platinizing, clean the cell with detergent and brush as described in Section 4.1.

Support the cell in a cylindrical vessel with the end of the cell raised from the bottom. It is not necessary to remove the cell from the fittings for platinizing. However, the guard tube must be removed from the low constant cells. Pour in platinizing solution (p/n 31103011) to a level above the cross-channel.

To platinize the 5, 10, 20, 25 and 50 constant cells, immerse an auxiliary platinum electrode* in the solution to a point about midway between the cross-channel or tube hole and the open end of the cell. Both electrodes of the cell are platinized simultaneously by connecting the negative terminal of the battery (see

Table 4.2 for voltage) to both leadwires of the cell.

ATTENTION

* This third electrode should be chemically pure platinum. Its shape is unimportant. It may be one of the electrodes in another conductivity cell or a platinum strip, sheet, rod, wire, etc.

Connect the positive terminal of the battery to the auxiliary platinum electrode. Note the time in seconds listed in Table 4.2. During the platinizing operation, move the cell up and down gently to keep the solution stirred. Then disconnect the battery and remove the cell. Rinse the cell thoroughly in tap water and then rinse in distilled water.

Pour the platinizing solution back into its container as it may be used a number of times.



Four Point Terminal Plate with #6-32 Screw Terminals

Five Point Terminal Board.

Each Terminal Will Accept

#16 Gage Max. Wire

1000 ft. max.

RED

B

Temp.

Comp.

GREEN

D

Cell

WHITE

C

BLACK

A

Internal Cell Assembly

Configuration

A

B

D

C

Note 3

B

D

A

C

Coax Cable Shield

4905

View of Junction Box Head with Cap Removed

l l A s l y n n

I II III IV

V VI

- - 333 - X1

4973

4974

I II III

- 333 - X1 -

IV V

4908

4909

I II III IV V VI

- - 333 - X1

VII

Note 2

Note 1

An

W K SH G

Conductivity/Resistivity

l y r I np

Analyzer

t C e n

R

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 7082 ground screw as shown dotted. Do not ground 10, 25, or 50 constant cells.

2. 70 1 17 , (only)

Use 22 gage minimum coaxial cable type RG59/U connecting shield to terminal "SH" only.

3. 70 2 , 1 , 1 9

For cable runs of up to 500 ft., use: 18 gage minimum, three conductor cable.

For cbale runs of 500 - 1000 ft., use: 16 gage minimum, three conductor cable.

7 2 , , 1 [coax and shield (SH) not used]

For cable runs of up to 500 ft., use: 18 gage minimum, four conductor cable.

For cable runs of 500 - 1000 ft., use: 16 gage minimum, four conductor cable.

4. Cell to analyzer cables are considered low level. Run seperate from high level wiring.

GND

Figure 5-1 Installation Diagram-Cat. 4909 Cells with Junction Box Head

Connected to 7082 Conductivity/Resistivity Analyzer

a/n 23345





#16 Gage Max. Wire

RED

B

Temp.

Comp.

GREEN

D

WHITE C

Cell

BLACK

A

Internal Cell Assembly

Configuration

Four Point Terminal Plate with #6-32 Screw Terminals

A

B

D

C

1000 ft. max.

Note 3

D

B

Note 2

R

W

K

W

K

SH

G

R

G

(Note 5)

#2 Temp

Compensator

#1 Temp

Compensator

Cell 2

(Note 5)

Electrodes

Cell 1

Electrodes

View of Junction Box Head with Cap Removed

C

A

Coax Cable

Shield

Note 1

4905

4973

4974

l l A s l y n n

I II III IV V VI

- - 333 - X1

I II III

- 333 - X1 -

IV V


Analyzer

An l y r I np t C e n

4908

4909

I II III IV

- - 333 - X1

V VI VII

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 9782 ground screw as shown dotted. Do not ground 10, 25, or 50 constant cells.

2. 97 2C (only)


3. 9 8 0



9 2C




5. If 2 Cells are to be appplied, the same wiring guidelines are applied to Cell 2 as are followed for Cell 1.

Figure 5-2 Installation Diagram-Cat. 4909 Cells with Junction Box Head


GND



Temp.

Comp.

Cell

RED

GREEN

WHITE

BLACK

4905

4973

4974

4908

4909

s s e l y e i o

I II III IV V VI

- - 333 - X1

I II III

- 333 - X1 -

IV V

I II III IV V VI

- - 333 - X1

VII

20 ft. max.



#16 Gage Max. Wire

Red

Green

Black

White

Cell cable is approx. .250"

(6.4mm) O.D. max. with 4 conductors of #18 AWG wire, 7 or 20 foot length.

i r e t C A a r I n t a t i o

W K SH G R

Note 1

Conductivity / Resistivity Analyzer

An l y ze t C e ti o s

GND

20 ft. max.

1000 ft. max.

Note 3

4905

4973

4974

4908

4909

l l A s l y Co e i o s

I II III IV V VI

- - 333 - X1

I II III

- 333 - X1 -

IV V

I II III IV V VI

- - 333 - X1

VII

Red

Green

Black

White

Junction Box

R

G

K

W

C l l t o a r T r o h n t i o o

Note 2

Coax Cable Shield

Note 1

W K

SH G R

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 7082 ground screw as shown dotted. Do not ground 10, 25, or 50 constant cells.

2. 70 1 , 1 , (only)


3. 70 -1 , 1 , 1 , 1



7 2 , , 1 [coax and shield (SH) not used]





Analyzer

An l y r I

Co n

n u

t i on

t

s

GND a/n 23346

Figure 5-3 Installation Diagram-Cat. 4909 Cells with 7 or 20 Foot Leads



Temp.

Comp.

Cell

RED

GREEN

WHITE

BLACK




#16 Gage Max. Wire

20 ft. max.

Red

Green

Black

White

K

W

K

R

W

SH

G

R

G

#2 Temp

#1 Temp

Compensator

Cell 2

(Note 5)

Electrodes

Cell 1

Electrodes

Cell cable is approx. 0.250"

(6.4mm) O.D. max. with 4 conductors of #18 AWG wire, 7 or 20 foot length.

Note 1

i r e t C A a r I n t a t i o


Analyzer

An l y r I np t C e s

(Note 5)

Compensator

GND 4905

4973

4974

4908

4909

l l A s l y n n

I II III IV

V VI

- - 333 - X1

I II III

- 333 - X1 -

IV V

I II III IV V VI

- - 333 - X1

VII

4905

4973

4974

4908

4909

s s e l y e i o

I II III IV

V VI

- - 333 - X1

I II III

- 333 - X1 -

IV V

I II III IV V VI

- - 333 - X1

VII

20 ft. max.

Red

Green

Black

White

Junction Box

R

G

K

W

1000 ft. max.

Note 3

C l l t o a e r o h n t i o B

Note 2

Coax Cable

Shield

Note 3

Note 1

K

W

K

SH

G

R

G

R

W

#2 Temp

Compensator

#1 Temp

Compensator

Cell 2

(Note 5)

Electrodes

Cell 1

Electrodes


Analyzer

An l y r I np t C e ti o s

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 9782 ground screw as shown dotted. Do not ground 10, 25, or 50 constant cells.

2. 97 - S (only)


3. 9 8 - S



9 78 - W0




5. If 2 Cells are to be applied, the same guidelines are applied to Cell 2 as wereused for Cell 1.

(Note 5)

GND a/n 23346

Figure 5-4 Installation Diagram-Cat. 4909 Cells with 7 or 20 Foot Leads



Industrial Automation and Control

Honeywell, Inc.

1100 Virginia Drive

Fort Washington, Pennsylvania 19034

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