Emerson Process Management Electric Co Weather Radio 225 Users Manual
225 to the manual 882ff466-7945-4443-971e-edc91731fc36
2015-02-06
: Emerson-Process-Management Emerson-Process-Management-Emerson-Process-Management-Emerson-Electric-Co-Weather-Radio-225-Users-Manual-540158 emerson-process-management-emerson-process-management-emerson-electric-co-weather-radio-225-users-manual-540158 emerson-process-management pdf
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Instruction Sheet PN 51A-225/rev.I December 2010 Model 225 Sanitary and CIP Toroidal Sensor For additional information, please visit our website at www.emersonprocess.com/raihome/liquid/. CAUTION SENSOR/PROCESS APPLICATION COMPATIBILITY The wetted sensor materials may not be compatible with process composition and operating conditions. Application compatibility is entirely the responsibility of the user. CAUTION WARNING Before removing the sensor, be absolutely certain that the process pressure is reduced to 0 psig and the process temperature is lowered to a safe level! SPECIFICATIONS MODEL Wetted Materials Temperature 225-03 225-07 225-08 225-09 PEEK (glass-filled) Unfilled PEEK, meets 21CFR177.2415 1 Unfilled PEEK, meets USP Class VI Tefzel (unfilled) 230°F (110°C) 266°F (130°C) 266°F (130°C) 230°F (110°C) Pressure 200 200 200 200 psig psig psig psig (1480 (1480 (1480 (1480 kPa kPa kPa kPa abs) abs) abs) abs) 1 Sensor meets 3A sanitary requirements for sensors and sensor fittings and connections used on milk and milk products equipment (74-03). INSTALLATION The sensor may be installed in either a tank or pipe using a customer-supplied Triclamp and tee assembly. The sensor requires a 2-inch Tri-clamp, a 2-inch type 1 gasket, and a 2-inch tank ferrule or tee. Keep at least 1 in. (25 cm) between sensor and pipe wall. If clearance is too small, calibrate the sensor in place. Ensure that the sensor is completely submerged in liquid to the flange. Mounting the sensor in a vertical pipe run with the flow from bottom to top is best. If the sensor must be mounted in a horizontal pipe run, orient the sensor in the 3 o’clock or 9 o’clock position. FIGURE 1. Dimensions MODEL 225 INSTALLATION WIRING Keep sensor wiring away from ac conductors and high current demanding equipment. Do not cut cable. Cutting the cable may void the warranty. FIGURE 2. Wire Functions FIGURE 3. Wiring 225-54 and 225-56 sensors to Model 1056 and 56 analyzers 2 MODEL 225 INSTALLATION FIGURE 4. Wiring 225-54 and 225-56 sensors to Model 54eC analyzer FIGURE 5. Wiring 225-54 and 225-56 sensors to Model Xmt-T panel mount transmitter 3 MODEL 225 WIRING FIGURE 6. Wiring 225-54 and 225-56 sensors to Model Xmt-T pipe/wall mount transmitter TB1 RCV B SENSE RCV A RTD IN RSHLD DRV B RCV B SENSE RCV A RTD IN RSHLD DRV B SHLD DRV A WHITE CLEAR BLACK CLEAR BLACK GREEN DSHLD WHITE WHITE BLACK GREEN BLACK CLEAR GREEN WHITE DRV A TB1 BLACK SHLD TB2 RTN CLEAR GREEN TB2 RTN DSHLD CLEAR (NOT USED) 225-54 225-56 FIGURE 7. Wiring 225-54 and 225-56 sensors to Model 1066 transmitter. 4 MODEL 225 WIRING FIGURE 8. Wiring 225-54 and 225-56 sensors to Model 5081-T transmitter PRESENT IN 23294-05 ONLY AND PN 23294-04 FIGURE 9. Wiring sensors through a remote junction box Wire sensors point to point. For wiring at the analyzer end, refer to the appropriate analyzer wiring diagram. For interconnecting cable 23294-00, use the 225-54 wiring diagram. For interconnecting cable 23294-04 and 23294-05, use the 225-56 wiring diagram. 5 MODEL 225 CALIBRATION FIGURE 10. Remote Junction Box (PN 23550-00) CALIBRATION The nominal cell constant of the Model 225 sensor is 2.7/cm. The error in the cell constant is about ±10%, so conductivity readings made using the nominal cell constant will have an error of at least ±10%. Wall effects, discussed below, will likely make the error greater. For higher accuracy, the sensor must be calibrated. Wall effects arise from the interaction between the current induced in the sample by the sensor and nearby pipe or vessel walls. As Figure 11 shows, the measured conductivity can either increase or decrease depending on the wall material. Because wall effects do not disappear until the Model 225 sensor is at least 1 inch (25 mm) away from the nearest wall, wall effects are present in most installations. Correcting for them is an important part of calibration. Conductivity sensors are calibrated against a solution of known conductivity (a standard) or against a previously calibrated referee sensor and analyzer. If wall effects are present, calibrating a toroidal sensor with a standard solution is possible only if the vessel holding the standard has exactly the same dimensions as FIGURE 11. Measured conductivity as a function of clearance between sensor and walls 6 the process piping. Model 225 sensors are often installed in sanitary flange tees, so an appropriate calibration vessel is another tee with blank flanges on the ends. If removing the sensor from the process piping for calibration is impractical, calibrate the sensor in place against a referee sensor and analyzer while both sensors are simultaneously measuring the process liquid. If this is not practical the sensor can also be calibrated against the results of a measurement made on a grab sample. For more information about calibrating toroidal conductivity sensors, refer to application sheet ADS 43-025 available on the Rosemount Analytical website. MAINTENANCE CAUTION Be sure sensor has been cleaned of process liquid before handling. Generally, the only maintenance required is to keep the opening of the sensor clear of deposits. Cleaning frequency is best determined by experience. MODEL 225 TROUBLESHOOTING TROUBLESHOOTING PROBLEM PROBABLE CAUSE SOLUTION Off-scale reading Wiring is wrong. Verify and correct wiring. RTD is open or shorted. Check the RTD for open or short circuits. See Figure 12. Sensor is not in process stream. Confirm that the sensor is fully submerged in the process stream. See installation section. Sensor is damaged. Perform isolation checks. See Figure 12. Sensor is improperly installed in the process stream. Confirm that the sensor is fully submerged in the process stream. See installation section. Sensor cable is run near high voltage conductors. Move cable away from high voltage conductors. Sensor cable is moving. Keep sensor cable stationary. Bubbles are trapped in the sensor, particularly in the toroid opening. Install the sensor in a vertical pipe run with the flow against the toroid opening. Increase flow if possible. Sensor is not completely submerged in the process stream. Confirm that the sensor is fully submerged in the process stream. See installation section. Cell constant is wrong. Wall effects are present. Calibrate the sensor in place in the process piping. See calibration section. Wrong temperature correction algorithm is being used. Check that the temperature correction is appropriate for the sample. See analyzer manual for more information. Temperature reading is inaccurate. Disconnect the RTD leads (Figure 12) and measure the resistance between the in and common leads. Resistance should be close to the value in Table 1. Slow temperature response to sudden changes in temperature. Use an RTD in a metal thermowell for temperature compensation. Sensor is installed in a dead area in the piping. Move sensor to a location more representative of the process liquid. Slow temperature response to sudden changes in temperature. Use an RTD in a metal thermowell for temperature compensation. Noisy reading Reading seems wrong (lower or higher than expected) Sluggish response TABLE 1. Temperature Resistance 10°C 103.9 Ω 20°C 107.8 Ω 25°C 109.7 Ω 30°C 111.7 Ω 40°C 115.5 Ω 50°C 119.4 Ω 7 FIGURE 12. Resistance check. Disconnect leads from analyzer before measuring resistances. The right people, the right answers, right now. ON-LINE ORDERING NOW AVAILABLE ON OUR WEB SITE http://www.raihome.com Specifications subject to change without notice. 8 Credit Cards for U.S. Purchases Only. Emerson Process Management 2400 Barranca Parkway Irvine, CA 92606 USA Tel: (949) 757-8500 Fax: (949) 474-7250 http://www.raihome.com © Rosemount Analytical Inc. 2010
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