LIQ_MAN_ABR_ April 2014 Total Chlorine Sensor For additional information, please visit our website at www.rosemountanalytical.com. CAUTION The wetted sensor materials may not be compatible with process composition and operating conditions. Application compatibility is entirely the responsibility of the user. CAUTION Do not exceed pressure and temperature specifications. Pressure: 65 psig max (549 kpa abs max) Temperature: 32 to 122 F (0 to 50 C) Specifications - Sensor Pressure: 0 to 65 psig (101 to 549 kpa abs) Temperature: 32 to 122 F (0 to 50 C) Process Connection: 1 inch MNPT Wetted Parts: Noryl, Viton, silicone Cathode: gold Installation The sensor is intended for use only in the SCS921, SCS921A, or TCL Sample Conditioning System for total chlorine. Consult the instruction manual for the sample conditioning system for more information. Wiring Note For additional wiring information on this product, including sensor combinations not shown here, please refer to either our online wiring programs or the Manual DVD enclosed with each product. 1056, 1057, 56, 5081, 6081, 54e, and XMT : http://www3.emersonprocess.com/raihome/sp/liquid/wiring/xmt/ 1066 and sensors with SMART preamps: http://www2.emersonprocess.com/en-us/brands/rosemountanalytical/liquid/sensors/ Pages/Wiring_Diagram.aspx 1055: http://www3.emersonprocess.com/raihome/sp/liquid/wiring/1055/
April 2014 LIQ_MAN_ABR_ Figure 1. Wiring Sensor with Standard Cable to 1056 and 56 Analyzers Figure 2. Wiring Sensor with Optimum EMI/RFI or Variopol Cable to 1056 and 56 Analyzers Figure 3. Wiring Sensor with Standard Cable to 54eA Analyzer Figure 4. Wiring Sensor with Optimum EMI/RFI or Variopol Cable to 54eA Analyzer 2
LIQ_MAN_ABR_ April 2014 Figure 5. Wiring Sensor with Standard Cable to 5081-A Transmitter. Figure 6. Wiring Sensor with Optimum EMI/RFI or Variopol Cable to 5081-A Transmitter. Figure 7. Wiring Sensor with Standard Cable to Xmt-A Transmitter. Figure 8. Wiring Sensor with Optimum EMI/RFI or Variopol Cable to Xmt-A Transmitter. 3
April 2014 LIQ_MAN_ABR_ Figure 9. Wiring Sensor with Standard Cable to 1066 Transmitter Figure 10. Wiring Sensor with Optimum EMI/RFI or Variopol Cable to 1066 Transmitter Figure 11. Pin Out Diagram for 499ACLVP Sensor (top view of connector end of sensor) When making connections through a junction box (PN 23550-00), wire point-to-point. NOTE Use a wire nut and pigtail (included) when connecting several wires to the same terminal. Calibration Zero point: The sample conditioning system converts total chlorine in the sample into iodine, which the 499ACL-02 sensor measures. Even in the absence of iodine, the 499ACL-02 sensor generates a small signal called the zero current. Failing to correct for the zero current can introduce a bias, particularly if the total chlorine concentration is small (<0.2 ppm). Zero the sensor when it is first placed in service and every time the fill solution is changed. To zero the sensor, place it in a cup of deionized or bottled water. Once the sensor current has reached a stable low value, which takes at least two hours, follow the analyzer prompts for zeroing the sensor. The zero current should be between -10 and +50 na. For more information refer to the TCL manual. Full Scale: Because stable dilute total chlorine standards are not available, the sensor must be calibrated against the results of a laboratory test run on a grab sample of the process liquid. Place the sensor in the flow cell inside the TCL and start the sample and reagent flow. Adjust the sample concentration so that it is near the upper end of the operating range. Once readings are stable, follow the analyzer prompts to complete the calibration. After calibration, go to the diagnostics menu and check the sensitivity. It should be between 900 and 1200 na/ppm. For more information, refer to the TCL manual. 4
LIQ_MAN_ABR_ April 2014 Maintenance When used in clean water, the total chlorine sensor requires little maintenance. Generally, the sensor needs maintenance when the response becomes sluggish or noisy or when readings drift following calibration. Maintenance frequency is best determined by experience. If the sensor is a used in potable water, expect to clean the membrane every month and replace the membrane and electrolyte solution every three months. Sensors used in dirty water require more frequent maintenance and calibration. However, if experience shows the sensor is holding calibration and not drifting appreciably between calibration intervals, the maintenance interval can be extended. CAUTION Before removing the sensor from the process stream for maintenance, be sure the process pressure is reduced to 0 psig and the process temperature is at a safe level! Cleaning the Membrane Keep the membrane clean. Clean the membrane with water sprayed from a wash bottle. Use a soft tissue to gently wipe the membrane. Replacing the Electrolyte Solution and Membrane CAUTION Fill solution may cause irritation. May be harmful if swallowed. Read and follow manual. 1. Unscrew the membrane retainer and remove the membrane assembly and O-ring. See Figure 12. 2. Hold the sensor over a container with the cathode pointing down. 3. Remove the fill plug and allow the electrolyte solution to drain out. 4. Wrap the plug with one or two turns of pipe tape and set aside. Remove old tape first. 5. Prepare a new membrane. Hold the membrane assembly with the cup formed by the membrane and membrane holder pointing up. Fill the cup with electrolyte solution. 6. Hold the sensor at about a 45-degree angle with the cathode end pointing up. Add electrolyte solution through the fill hole until the liquid overflows. Tap the sensor near the threads to release trapped air bubbles. Add more electrolyte solution if necessary. 7. Place the fill plug in the electrolyte port and begin screwing it in. After several threads have engaged, rotate the sensor so that the cathode is pointing up and continue tightening the fill plug. Do not over tighten. 8. Place a new O-ring in the groove around the cathode post. Cover the holes at the base of the cathode stem with several drops of electrolyte solution. 9. Insert a small blunt probe, like a toothpick with the end cut off, through the pressure equalizing port. See Figure 12. Gently press the probe against the bladder several times to force liquid through the holes at the base of the cathode stem. Keep pressing the bladder until no air bubbles can be seen leaving the holes. Be sure the holes remain covered with electrolyte solution. NOTE Do not use a sharp probe. It will puncture the bladder and destroy the sensor. 10. Place a drop of electrolyte solution on the cathode, then place the membrane assembly over the cathode. Screw the membrane retainer in place. 11. The sensor may require several hours operating at the polarizing voltage to equilibrate after the electrolyte solution has been replaced. 5
April 2014 LIQ_MAN_ABR_ Figure 12. Sensor Parts Spare Parts 33523-00 Electrolyte Fill Plug 9550094 O-Ring, Viton 2-014 33521-00 Membrane Retainer 23501-02 Total Chlorine Membrane Assembly: includes one membrane assembly and one O-ring 23502-02 Total Chlorine Membrane Kit: includes 3 membrane assemblies and 3 O-rings 9210438 Total Chlorine Sensor Fill Solution, 4 oz (120 ml) 6
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April 2014 LIQ_MAN_ABR_ Rev. J facebook.com/emersonrosemountanalytical AnalyticExpert.com twitter.com/raihome Credit Cards for U.S. Purchases Only. youtube.com/user/rosemountanalytical 2014 Rosemount Analytical, Inc. All rights reserved. Emerson Process Management 2400 Barranca Parkway Irvine, CA 92606 USA Tel: (949) 757-8500 Fax: (949) 474-7250 rosemountanalytical.com Rosemount Analytical Inc. 2014 The Emerson logo is a trademark and service mark of Emerson Electric Co. Brand name is a mark of one of the Emerson Process Management family of companies. All other marks are the property of their respective owners. The contents of this publication are presented for information purposes only, and while effort has been made to ensure their accuracy, they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or applicability. All sales are governed by our terms and conditions, which are available on request. We reserve the right to modify or improve the designs or specifications of our products at any time without notice.