Instruction Manual PN 51-SCS921A/rev.A November 2003 Model SCS 921A Reagent-Based Chlorine System ESSENTIAL INSTRUCTIONS WARNING ELECTRICAL SHOCK HAZARD READ THIS PAGE BEFORE Making cable connections to and servicing PROCEEDING! this instrument require access to shock haz- ard level voltages which can cause death or Rosemount Analytical designs, manufactures, and tests its serious injury. products to meet many national and international stan- dards. Because these instruments are sophisticated techni- Be sure to disconnect all hazardous voltage cal products, you must properly install, use, and maintain before opening the enclosure. them to ensure they continue to operate within their normal specifications. The following instructions must be adhered Relay contacts made to separate power to and integrated into your safety program when installing, sources must be disconnected before servic- using, and maintaining Rosemount Analytical products. ing. Failure to follow the proper instructions may cause any one of the following situations to occur: Loss of life; personal Electrical installation must be in accordance injury; property damage; damage to this instrument; and with the National Electrical Code warranty invalidation. (ANSI/NFPA-70) and/or any other applicable • Read all instructions prior to installing, operating, and national or local codes. servicing the product. If this Instruction Manual is not the Unused cable conduit entries must be correct manual, telephone 1-800-654-7768 and the securely sealed by non-flammable closures requested manual will be provided. Save this Instruction Manual for future reference. to provide enclosure integrity in compliance with personal safety and environmental pro- • If you do not understand any of the instructions, contact tection requirements. your Rosemount representative for clarification. The unused conduit openings need to be • Follow all warnings, cautions, and instructions marked on sealed with NEMA 4X or IP65 conduit plugs and supplied with the product. to maintain the ingress protection rating • Inform and educate your personnel in the proper installa- (IP65). tion, operation, and maintenance of the product. For safety and proper performance this • Install your equipment as specified in the Installation instrument must be connected to a properly Instructions of the appropriate Instruction Manual and grounded three-wire power source. per applicable local and national codes. Connect all products to the proper electrical and pressure sources. Proper relay use and configuration is the responsibility of the user. • To ensure proper performance, use qualified personnel to install, operate, update, program, and maintain the prod- No external connection to the instrument of uct. more than 69VDC or 43V peak allowed with • When replacement parts are required, ensure that quali- the exception of power and relay terminals. fied people use replacement parts specified by Any violation will impair the safety protection Rosemount. Unauthorized parts and procedures can provided affect the product’s performance and place the safe oper- Do not operate this instrument without front ation of your process at risk. Look alike substitutions may cover secured. Refer installation, operation result in fire, electrical hazards, or improper operation. and servicing to qualified personnel. • Ensure that all equipment doors are closed and protec- tive covers are in place, except when maintenance is being performed by qualified persons, to prevent electri- WARNING cal shock and personal injury. This product is not intended for use in the light indus- trial, residential or commercial environment, per the instrument’s certification to EN50081-2. Emerson Process Management Rosemount Analytical Inc. 2400 Barranca Parkway Irvine, CA 92606 USA Tel: (949) 757-8500 Fax: (949) 474-7250 http://www.raihome.com © Rosemount Analytical Inc. 2003 DANGER CAUTION HAZARDOUS AREA INSTALLATION SENSOR/PROCESS APPLICATION COMPATIBILITY Installations near flammable liquids or in haz- Wetted materials may not be compati- ardous area locations must be carefully eval- ble with process composition and uated by qualified on site safety personnel. operating conditions. Application This device is not Intrinsically Safe or compatibility is entirely the responsi- Explosion Proof. bility of the user. To secure and maintain an intrinsically safe installation, the certified safety barrier, transmitter, and sensor combination must be used. The installation system must com- ply with the governing approval agency (FM, CSA or BASEEFA/CENELEC) hazardous area classification requirements. Consult your analyzer/transmitter instruction manual for details. Proper installation, operation and servicing of this device in a Hazardous Area Instal- lation is entirely the responsibility of the user. About This Document This manual contains instructions for installation and operation of the Model SCS921A Reagent-Based Chlorine System. The following list provides notes concerning all revisions of this document. Rev. Level Date Notes A 11/03 This is the initial release of the product manual. The manual has been reformatted to reflect the Emerson documentation style and updated to reflect any changes in the product offering. MODEL SCS 921A TABLE OF CONTENTS MODEL SCS 921A REAGENT-BASED CHLORINE SYSTEM TABLE OF CONTENTS Section Title Page 1.0 DESCRIPTION AND SPECIFICATIONS.................................................... 1 Specifications.............................................................................................. 1 Ordering Information................................................................................... 2 2.0 INSTALLATION.......................................................................................... 4 Unpacking and Inspection .......................................................................... 4 Installation................................................................................................... 4 3.0 PRINCIPLES OF OPERATION .................................................................. 6 4.0 START-UP .................................................................................................. 7 Install the Sensor ........................................................................................ 7 Install the Sample and Drain Lines ............................................................. 7 Connect the Sample Conditioning Cabinet to a Power Source .................. 7 Start Sample Flow....................................................................................... 7 Zero the Sensor .......................................................................................... 8 Prepare and Install the Reagent ................................................................. 8 Begin Operation.......................................................................................... 8 5.0 CALIBRATION ........................................................................................... 9 6.0 MAINTENANCE AND TROUBLESHOOTING........................................... 10 Inspection ................................................................................................... 10 Sample Conditioning Reagent .................................................................... 10 Peristaltic Pump.......................................................................................... 10 Sensor ........................................................................................................ 10 Reagent Flow Check Procedure................................................................. 11 Cleaning the Sample Conditioning System ................................................ 11 Troubleshooting .......................................................................................... 12 i MODEL SCS 921A TABLE OF CONTENTS TABLE OF CONTENTS CONT'D. LIST OF FIGURES Figure No. Title Page 2-1 Recommended Arrangement of Analyzer & Sample Conditioning Cabinet . 4 2-2 Dimensions of SCS 921A Case .................................................................. 5 3-1 Schematic of Sample Conditioning System and Analyzer .......................... 6 3-2 Sample Conditioning System...................................................................... 6 ii MODEL SCS 921A SECTION 1 DESCRIPTION AND SPECIFICATIONS SECTION 1. DESCRIPTION AND SPECIFICATIONS The SCS 921A is a sample conditioning and measuring system for the continuous determination of chlorine in water. Although the SCS921A is intended primarily for the determination of chlorine in chlorinated seawater, it can also be used to determine monochloramine, free chlorine, and certain bromine oxidants. It is not suitable for the determination of dichloramine and other inorganic and organic chloramines. The conditioning system continuously pumps buffered potassium iodide reagent into the sample. Oxidants in the sample convert iodide into an equivalent amount of iodine. A sensor measures the concentration of iodine and sends its signal to the analyzer. The analyzer displays the concentration in ppm (mg/L) as Cl2. SPECIFICATIONS - SAMPLE CONDITIONING SYSTEM SAMPLE CONDITIONING SYSTEM Reagent: Potassium iodide, acetic acid, and sodium PHYSICAL acetate solution, 1 gallon (3.785 L). Enclosure: Fiberglass reinforced polyester, designed Reagent Usage: 1 gallon lasts approximately 14 days. to NEMA 12 standards Reagent Pump: Fixed speed peristaltic pump, 15 rpm, Dimensions: H 20.6 in. W 13.3 in. D 6.9 in. 10-11 mL/hr. (H 52.3 cm W 33.7 cm D