Weighfeeders SITRANS WW200 Operating Instructions 03/2010 SITRANS
Safety Guidelines: Warning notices must be observed to ensure personal safety as well as that of others, and to protect the product and the connected equipment. These warning notices are accompanied by a clarification of the level of caution to be observed. Qualified Personnel: This device/system may only be set up and operated in conjunction with this manual. Qualified personnel are only authorized to install and operate this equipment in accordance with established safety practices and standards.
Table of Contents Safety ..................................................................................................................................... 2 Safety and General Precautions .........................................................................................................2 Specifications ...................................................................................................................... 3 Operation .................................................................
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SITRANS WW200 SITRANS WW200 is a low- to medium- capacity weighfeeder for minor ingredient additives. The unique weigh system applies live load directly to two platform load cells. The SITRANS WW200 comes with weigh bridge, speed sensor, and test weights. An integrator is required to complete the system. Safety Notes Note: means important information about the product or that part of the operating manual.
Safety Safety and General Precautions WARNING: Always follow safe practices when working on or around the SITRANS WW200, especially in wet environments and when adjacent to conductive steel mounting framework. ALWAYS STOP the belt, lock-out, and/or place a "Do Not Energize" tag on the main disconnect before working on or around the weighfeeder. Note: A weighfeeder can be dangerous. Pinch points exist along the conveyor belt line.
Specifications Accuracy • ± 0.5%1 Operating Temperature • -10 to +40 °C (+14 to +104 °F) Materials • mild steel with stainless steel, abrasive resistant contact parts optional Load Cells • two corrosion resistant platform type with mechanical overload protection (aluminum or stainless steel) • non-linearity ± 0.03% • non-repeatability ± 0.
Belt Tension • screw type, telescoper module with 150 mm (6") travel (mild or stainless steel) Belt Cleaning • UHMW blade type with spring tensioning at head pulley • return plow Belt Support • edge of flatbars eliminates material buildup Drive • 0.37 kW (0.
Operation Weighfeeders Weighfeeders weigh bulk material while it is conveyed. An accurate rate of flow and totalized weight measurement is received without interrupting the flow of material in process. A weighfeeder can also control the rate of flow of the conveyed product. In-motion weighing requires accurate transmission of the product load to strain gauge load cells.
Installation mmmmm Mechanical Installation Perform a thorough and systematic inspection of containers immediately upon receipt of your Siemens weighfeeder. The containers are packed to separate each item and provide protection during shipping. Note: Do not remove equipment from shipping crates or boxes until you check for possible shipping damage. Contact the carrier immediately if damage is noted. Your weighfeeder has been designed, assembled, and factory tested for your specific application.
minimize the possibility of load cell damage resulting from incidental overload. 9. Before starting the machine, make a final check to see that the conveyor belt is free of all tools and foreign objects. 7ML19985MS01 SITRANS WW200 - OPERATING INSTRUCTIONS Page 7 mmmmm Note: DO NOT loosen or tighten the overload bolt—it has been factory set to Installation 8. present) must be grounded to minimize noise to the electronic integrator.
Calibration After SITRANS WW200 has been properly installed, calibration of the weighing system must be done in conjunction with the integrator. Refer to the integrator instruction manual for programming and calibration. The calibration is initially done using the supplied test load. Material tests are recommended to achieve maximum accuracy. Calibration mmmmm Test Load The test load value for your SITRANS WW200 is given on the accompanying test sheet.
Wiring load cell ‘B’ load cell ‘A’ Note: aluminum/ nickelplated shown for reference R R B B E E L L D D K K ‘A’ ‘B’ ‘A’ ‘B’ W H T ‘B’ G R N ‘B’ S I G + S I G S I G + S I G A A B B junction box S H I E L D to integrator Aluminum/Nickelplated Stainless Steel RED GREEN TB 2 +Sense TB 3 -Sense TB 4 -Excitation BLACK BLACK TB 5 +Load Cell A GREEN WHITE TB 6 -Load Cell A WHITE BLACK/RED TB 7 +Load Cell B GREEN WHITE TB 8 -Load Cell B WHITE BLACK/RED YELLOW YELLOW/CLEAR SIEMEN
Start Up Your weighfeeder has been factory run-in for a minimum of four hours; it should require little adjustment. However, periodic inspections of the belt tracking are recommended. Start the belt and observe rotation. WARNING: Turn off and lock out all power sources before correcting rotation. On DC motors, reverse the armature wires. On AC motors, reverse 2 of the 3 motor wires. Start the belt again and observe the machine as it is running.
Changing the Conveyor Belt 1. Open and remove the access and non-access side covers (omit this step on open construction models). 2. Mark the position of the telescopers for reference. This will be handy when you reinstall the belt. Loosen the telescopers to remove tension from the belt. 3. At the discharge end of the conveyor, find the belt scraper spring tensioner. Unhook the spring on both sides of the belt scraper arm and let the belt scraper swing down away from the belt.
Belt Tracking 1. Before attempting to track the belt, be sure: • belt scraper and belt tension counterweights are in place • belt tension is near guidelines suggested on page 11 • feeder is level and true • installation has not warped or twisted the frame • head and tail pulley are square • plow is contacting underside Turn on the feeder and observe its tracking line on the head and tail pulleys.
6. If you are having problems tracking the belt, consult Siemens Milltronics. Common causes of belt tracking problems are: uneven or improperly distributed product loading, twisted frame, or product buildup on head or tail pulleys. jam nut adjusting screw side rail driven shaft Load Cell Replacement WARNING: ALWAYS STOP the belt, lock-out, and/or place a "Do Not Energize" tag on the main disconnect before working on or around the weighfeeder.
3. Install the shipping screw (tagged) through the bottom load cell mount and into the load cell. Tighten the shipping screw until the load cell bottoms out on the overload screw. weigh deck belt top load cell mount overload screw shipping screw load cell bottom load cell mount 4. Support the scale deck and remove the two top load cell mount bolts. Be careful not to move the deck as it is still attached to the load cell on the other side of the weighfeeder. 5.
Calibration 1. Power up the integrator and using the appropriate integrator menu, verify that the new load cell(s) are operating correctly. 2. Zero calibrate the unit. using the integrator manual for reference. Record zero calibration procedure results. 3. Span calibrate the unit using the integrator manual for reference. Record span calibration procedure results. 4. Re-check zero calibration. Run another zero calibration and record the results.
Troubleshooting Mechanical Troubleshooting Review mechanical installation procedures and perform a thorough visual inspection to be sure the operating error is caused by a mechanical problem. Then review and check the common problems listed below. Note: If you have difficulty determining the cause of the problem, contact the Service Department at Siemens Milltronics. Be sure to have the Model Number and Serial Number of your system and all of the calibration and setup parameters available before calling.
Maintenance The maintenance schedule below is recommended to maintain top performance and accuracy of the system. Weighfeeders mounted in severe weather or dusty conditions may require a more rigorous maintenance schedule. Make sure the weigh idler is aligned with the approach and retreat sections for accurate weighing. Periodic measurement to verify alignment is recommended.
Maintenance mmmmm Lubrication All head and tail pulley bearings are pre-greased at the factory. These bearings should be field greased periodically. The frequency of lubrication may vary due to specific operating conditions. Some dry, dusty applications may warrant weekly greasing, while other less harsh applications may need greasing only once or twice a year. In no case, however, should more than 10,000 hours elapse between re-greasing.
Dimensions Open Unit A (nominal) belt width “A” inlet 1321 mm (52”) discharge 724 mm (28.5”) 229 mm (9”) 698 mm (27.5”) “A” Open Unit Belt Width 305 mm (12”) 457 mm (18”) 610 mm (24”) 762 mm (30”) 914 mm (36”) 1067 mm (42”) 1219 mm (48”) 7ML19985MS01 A 660 mm (26”) 813 mm (32”) 965 mm (38”) 1118 mm (44”) 1270 mm (50”) 1422 mm (56”) 1575 mm (62”) B 257 mm (10.14”) 333 mm (13.13”) 410 mm (16.13”) 486 mm (19.13”) 562 mm (22.
Enclosed Unit view A-A A (nominal) B Dimensions mmmmm belt width C B/2 C/2 “A” inlet 425 mm (16.75”) 1975 mm (77.75”) 1321 mm (52”) discharge 908 mm (35.75”) 146 mm (5.75”) 95 mm (3.75”) 425 mm (16.75”) 1016 mm (40”) “A” Enclosed Unit Belt Width 305 mm (12”) 457 mm (18”) 610 mm (24”) 762 mm (30”) 914 mm (36”) 1067 mm (42”) 1219 mm (48”) Page 20 A 889 mm (35.38”) 1051 mm (41.38”) 1203 mm (47.38”) 1356 mm (53.38”) 1508 mm (59.38”) 1661 mm (65.38”) 1813 mm (71.
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www.siemens.com/processautomation For more information www.siemens.com/level www.siemens.com/continuous-weighing Siemens Milltronics Process Instruments Inc. Industry Automation (IA) 1954 Technology Drive P.O. Box 4225 Peterborough, ON Canada K9J 7B1 Subject to change without prior notice 7ML19985MS01 Rev. 1.0 © Siemens Milltronics Process Instruments Inc. 2010 email: techpubs.smpi@siemens.com www.siemens.
