ECD DCA-23 User Manual

ELECTRO-CHEMICAL DEVICES, INC.

DCA-23 Instruction Manual

Seawater Chlorination/Dechlorination Analyzer

ELECTRO-CHEMICAL DEVICES, INC.

1681 Kettering, Irvine, CA 92614, USA

Tel: [phone], FAX: [phone]

www.ecdi.com

The information and technical data disclosed in this document may be used and disseminated only for the purposes and to the extent specifically
authorized in writing by Electro-Chemical Devices. Electro-Chemical Devices reserves the right to change published specifications and designs
without prior notice. Part No. 33DCA-23 Revision A

Rev: A - 03/11

PREFACE

Purchasing products from Electro-Chemical Devices, Inc. provides you with the finest liquid analytical instrumentation
available. If this is your first purchase from ECD, please read this manual before installing and commissioning your new
equipment.

If there are any questions concerning this equipment, please contact your local ECD representative, or the factory
directly at:

Electro-Chemical Devices, Inc.

1681 Kettering

Irvine, CA 92614 USA

Telephone: [phone]

FAX: [phone]

Website: www.ecdi.com

Email: [e-mail]

© 2010 Electro-Chemical Devices, Inc. All rights reserved. No part of this manual may be used or reproduced in any form or by any means, or stored in a database or
retrieval system without prior written permission from Electro-Chemical Devices, Inc. Making copies of any part of this manual for any purpose other than personal
use is a violation of United States copyright laws. Document printed in the United States of America.

Page ii DCA-23 Dechlorination Analyzer

TABLE OF CONTENTS

PREFACE .................................................................................................................................................................................. ii

TABLE OF CONTENTS .............................................................................................................................................................. iii

WARRANTY.............................................................................................................................................................................. v

IMPORTANT SERVICE INFORMATION ..................................................................................................................................... v

UNPACKING THE INSTRUMENT .............................................................................................................................................. vi

1.0 GENERAL DESCRIPTION ..................................................................................................................................................... 1

1.1 Features ........................................................................................................................................................................ 2

1.2 Specifications ................................................................................................................................................................ 2

2.0 INSTALLATION ................................................................................................................................................................... 4

2.1 MOUNTING ................................................................................................................................................................... 4

2.2 WIRING .......................................................................................................................................................................... 5

2.2.1 Wiring, Sensor(s) .................................................................................................................................................... 5

2.2.2 Wiring, power ........................................................................................................................................................ 5

2.2.3 Wiring, 4-20 mA Outputs ....................................................................................................................................... 5

2.2.4 Wiring, Contact Relay Outputs ............................................................................................................................... 5

2.3 PLUMBING ..................................................................................................................................................................... 6

2.3.1 Sample Requirements ............................................................................................................................................ 6

2.3.2 Connecting the Inlet and Drain fittings .................................................................................................................. 6

2.4 INSTALLING the SENSORS ............................................................................................................................................. 6

3.0 OPERATION ....................................................................................................................................................................... 7

3.01 Measurement Overview ......................................................................................................................................... 7

Table #1 TRO/pH/Equivalent Chlorine ppm .................................................................................................................... 7

3.1 KEYS ............................................................................................................................................................................... 8

3.2 MENUS .......................................................................................................................................................................... 8

3.2.1 TRO Menus ............................................................................................................................................................. 8

3.2.2 pH Menus ............................................................................................................................................................... 9

3.3 CALIBRATION MENUS ................................................................................................................................................. 11

3.3.1 pH Calibration ...................................................................................................................................................... 11

3.3.2 TRO Calibration .................................................................................................................................................... 11

3.3.3 Temperature Trim ................................................................................................................................................ 11

DCA-23 Page iii

3.4 OUTPUTS (4-20 mA Channels) ................................................................................................................................ 12

3.4.1 pH Output ............................................................................................................................................................ 12

3.4.2 Chlorine Output ................................................................................................................................................... 12

3.4.3 Manual Mode (4-20 mA Hold Function) .............................................................................................................. 12

3.5 ALARM RELAYS ............................................................................................................................................................ 13

3.5.1 Chlorine Alarm Relay ............................................................................................................................................ 13

3.5.2 pH Alarm Relay ..................................................................................................................................................... 13

4.0 START UP ......................................................................................................................................................................... 14

4.1 CALIBRATION ............................................................................................................................................................... 14

4.2 TEMPERATURE SENSOR .............................................................................................................................................. 14

4.3 pH SENSOR .................................................................................................................................................................. 14

4.3.1 Two Point Calibration ........................................................................................................................................... 14

4.4 CHLORINE SENSOR (TRO) ............................................................................................................................................ 14

4.4.1 TRO Calibration Example...................................................................................................................................... 15

5.0 MAINTENANCE ................................................................................................................................................................ 16

5.1 Chlorine TRO Sensor ................................................................................................................................................... 16

5.2 pH Sensor .................................................................................................................................................................... 16

6.0 TROUBLESHOOTING ........................................................................................................................................................ 17

7.0 ORDERING INFORMATION .............................................................................................................................................. 18

7.1 ACCESSORIES and SPARE PARTS ................................................................................................................................. 18

8.0 ENGINEERING DOCUMENTATION ................................................................................................................................... 19

8.1 SPECIFICATIONS .......................................................................................................................................................... 19

8.2 OUTLINE & DIMENSIONAL DRAWING ......................................................................................................................... 21

PN 1290220 ................................................................................................................................................................... 21

8.3 WIRING DIAGRAMS ..................................................................................................................................................... 21

PN 1290220-1 ................................................................................................................................................................ 21

PN 1290220-2 ................................................................................................................................................................ 22

PN 1290220-3 ................................................................................................................................................................ 22

PN 1290220-4 ................................................................................................................................................................ 23

PN 1290220-5 ................................................................................................................................................................ 23

Page iv DCA-23 Dechlorination Analyzer

WARRANTY

Electro-Chemical Devices, Inc. (ECD) warrants all products it manufactures to be free from defect in materials and factory workmanship, and agrees
to repair or replace any product that fails to perform, as specified, within one (1) year after date of shipment. This warranty shall not apply to any
product that has been:

1. Subjected to misuse, negligence or accident;

2. Connected, installed, adjusted or otherwise used not in accordance with the instructions furnished by ECD;

3. Repaired, modified or altered by persons not authorized by ECD, resulting in injury to the performance, stability or reliability of the
product.

This warranty is in lieu of any other warranty, expressed or implied. ECD reserves the right to make changes in the design or construction of its
products at any time, without prior notification, and without incurring any obligation to make any changes in previously delivered products.

Seller’s sole liabilities and the buyer’s sole remedies under this agreement shall be limited to a refund in the purchase price, or at ECD’s discretion,
to the repair or replacement of any product that proves, upon ECD’s examination, to be defective, when returned to the factory, transportation
prepaid by the buyer, within one (1) year of the product’s original shipment date. Seller shall not be liable for damages consequential or incidental
to defects in any product, for failure of delivery in whole or in part, for injuries resulting from its use, or for any other cause.

This warranty and the writing attached constitute the full understanding of seller and the buyer, and no terms, conditions, understanding, or
agreement purporting to modify or vary the terms hereof shall be binding unless hereafter made in writing and signed by an authorized official of
Electro-Chemical Devices, Inc.

This warranty does not cover pH, ORP or Specific Ion measurement, reference or combination electrodes or electrode cartridges that have been
commissioned in service.

IMPORTANT SERVICE INFORMATION

Use only factory authorized components for repair. Tampering or unauthorized substitution of components may adversely affect the
operation of this product and may void the warranty.

If service or repair is required, please obtain the serial number(s) or sales order number of the product(s) in question and contact
ECD’s Service Department at:

[phone] (USA/Canada) or [phone]

or email [e-mail]

A Return Material Authorization (RMA) number must be obtained from the service department before returning any material to
ECD. All material returned to ECD shall be shipped prepaid to the factory.

DCA-23 Page v

UNPACKING THE INSTRUMENT

Your Electro-Chemical Devices instrument has been carefully packaged to protect it from damage during shipment and
dry storage. Upon receipt please follow the procedure outlined below.

1. Before unpacking, inspect the condition of the shipping container to verify proper handling by the carrier. If
damage is noted, save the shipping container as proof of mishandling for the carrier.

2. Check the contents of the shipping container with the items and quantities shown on the packing list.
Immediately report any discrepancies to ECD.

3. Save the original packing material until you are satisfied with the contents. In the event the product(s) must be
returned to ECD, the packing material will allow you to properly ship it to ECD.

4. Familiarize yourself with the instrument before installation, and follow proper installation and wiring
procedures.

Page vi DCA-23 Dechlorination Analyzer

1.0 GENERAL DESCRIPTION

The Model DCA-23 is a single purpose analyzer designed to
monitor the chlorination and/or dechlorination of seawater in
the range of 0.00 - 2.00 ppm.

Sea water is used for cooling in power plants, refineries and
SWAC systems (salt water air conditioning). The heat
exchangers on LNG terminals use large quantities of sea
water in the regasification process. Sea water is also
chlorinated and de-chlorinated at desalination plants. The
chlorination of sea water inhibits the growth of marine life on
the various filters, screens and heat exchange surfaces that the sea water passes over. Before the
chlorinated water is returned to the environment it must be dechlorinated to a level acceptable to the
local authorities.

Sea water contains approximately 68 mg/L of bromide. When chlorine is added to sea water, the
bromide ion is oxidized to hypobromous acid (HOBr) and hypobromite (OBr-) by the Free Chlorine (HOCl
and OCl-). This is a very rapid reaction and essentially all of the chlorine is instantaneously converted
into bromine and bromamines. The DCA-23 displays Chlorine ppm in order to conform to existing
conventions. It actually measures the temperature, pH and Total Residual Oxidant (TRO) potential of the
seawater and converts them into an equivalent “ppm chlorine” value. TRO is defined as the total
oxidizing capacity (free and combined) of the sea water that is available after chlorination.

The Model DCA-23 analyzer is supplied as a fully assembled rack mounted system. The ¾” schedule 80
PVC pipe flow through assembly is configured with ¾” slip fittings on both the Input and Drain ends. The
flow through assembly and the T23 Analyzer/Transmitter are mounted on two 1 ⅝” x 1 ⅝” Uni Strut rails
pre-drilled with two 0.38” holes 24” apart and with 6” between the Struts. The Standard Configuration
allows the sample to flow through either the measurement loop or the bypass loop depending on the
valve orientations. The pH sensor and TRO sensor are pre-wired into the analyzer allowing for easy
installation and Start Up of this measurement system. Simply mount the DCA-23 assembly to a wall,
plumb the Input and Drain lines, connect the power and output wiring and the system is up and running.

DCA-23 Page 1

1.1 Features

• Uni Strut Rail Mounted System, Easy Installation

• Plumb and Play Design, Ready to Use

• Not Flow Sensitive, Eliminates Pressure Regulators and Rotameters

• Direct Chlorine Readout, pH and Temperature compensated

1.2 Specifications

Sensor and Flow Train

TRO Sensor:

Platinum Indicator/Silver-Silver chloride Reference, PTFE junction

0.75” OD x 10.5” length, Internal Signal Conditioning

pH Sensor:

Glass Indicator/Silver-Silver chloride Reference, PTFE junction

0.75” OD x 10.5” length, Internal Signal Conditioning

Measurement Range:

Chlorine: 0.00 to 2.00 ppm
pH: 0 to 14 pH

Operating Temperature:

0° C to 60° C (32° F to 140° F)

Operating Pressure:

0-50 psig at 60° C

Wetted Materials:

PVC, PP, PTFE, Glass, Platinum, 316 SS

Process Connections:

Input: ¾” NPT Slip fitting,
Drain: ¾” NPT Slip fitting

Response Time:

T90 in 2 minutes

C22 Analyzer:

Measurements:

Chlorine: 0.01 to 2.00 ppm
pH: 0 to 14 pH
Temperature: 0° C to 100° C (32° F to 212° F)

pH Compensation:
Automatic
Display:
4” X 1” LCD, 2 x 16 characters
Enclosure:

NEMA 4X, LxWxD: 5.7” x 5.7” x 7

Outputs:

(1) 4-20 mA for Chlorine (set to Sensors Range, 0-2.00 ppm or 0-1.00 ppm)

Page 2 DCA-23 Dechlorination Analyzer

(1) 4-20 mA for pH (Optional) set 0-14 pH

Alarm Relay Ratings:

Optional (2) SPDT 230 VAC/5A or 30 VDC / 5A resistive max.
Standard Configuration (1) High Alarm Chlorine, (1) Low Alarm Chlorine, (User adjusted Set Points)

(Optional User Defined configuration, Configurable at the Factory Only)

Input Power

24 VDC (12 to 50 VDC) @ 0.25A
Optional 110/220 VAC @ 50/60 Hz

DCA-23 Page 3