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Start Up

8.7 Load cell replacement

SITRANS WW310
Operating Instructions, 03/2014, A5E33490433-AA

29

①

Load cell

④

Overload screw

②

Bottom load cell mount

⑤

Top/front load cell mount

③

Shipping screw

Note
Load cell may appear different than shown.

Step 3

Support the scale idler/deck from below or above, and remove the two top/front load cell mount

bolts. Be careful not to move the idler as it is still attached to the load cell on the other side of the

weighfeeder.

Step 4

Remove the two bottom load cell mount bolts.

Step 5

Remove the load cell off the feeder.

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Содержание SITRANS WW310

Страница 1: ...SITRANS Weighfeeders SITRANS WW310 Operating Instructions 03 2014 ...

Страница 2: ...und version and in electronic version We encourage users to purchase authorized bound manuals or to view electronic versions as designed and authored by Siemens Milltronics Process Instruments Siemens Milltronics Process Instruments will not be responsible for the contents of partial or whole reproductions of either bound or electronic versions While we have verified the contents of this manual fo...

Страница 3: ...______________ ___________________ ___________________ ___________________ ___________________ SITRANS Weighfeeders SITRANS WW310 Operating Instructions 03 2014 A5E33490433 AA Introduction 1 Safety notes 2 Technical data 3 Operation 4 Mechanical installation 5 Calibration 6 Wiring 7 Start Up 8 Troubleshooting 9 Maintenance 10 Dimensions 11 ...

Страница 4: ...only by personnel qualified for the specific task in accordance with the relevant documentation in particular its warning notices and safety instructions Qualified personnel are those who based on their training and experience are capable of identifying risks and avoiding potential hazards when working with these products systems Proper use of Siemens products Note the following WARNING Siemens pr...

Страница 5: ...chanical installation 13 5 1 Installation 14 6 Calibration 19 6 1 Test load 19 6 2 Zero 19 6 3 Span 19 7 Wiring 21 8 Start Up 23 8 1 Shear gate 23 8 2 Skirtboards 23 8 3 Changing the conveyer belt 24 8 4 Belt tension 25 8 5 Belt tracking 26 8 6 Telescoper adjustment 26 8 7 Load cell replacement 28 8 7 1 Removing old load cell 28 8 7 2 Installing new load cell 30 8 7 3 Calibration 31 8 8 Weighing i...

Страница 6: ...Maintenance 35 10 1 1 Recommended Preventative Maintenance Schedule 35 10 2 General maintenance 36 10 3 Lubrication 36 10 4 Weighfeeder storage recommendations 37 10 4 1 Load cell care 37 10 4 2 Gear reducer Gear motor 37 10 4 3 Electrical 37 10 4 4 Lubrication 37 10 4 5 Belt care 37 11 Dimensions 39 11 1 8 pulley open unit 39 11 2 8 pulley enclosed unit 40 11 3 12 pulley open unit 41 11 4 12 pull...

Страница 7: ...ct is intended for use in industrial areas Operation of this equipment in a residential area may cause interference to several frequency based communications 1 1 The Manual This instruction manual covers the operation installation and maintenance of SITRANS WW310 Weighfeeder Specific information for your Weighfeeder model is also included with the product such as testing documents Follow these ope...

Страница 8: ...Introduction 1 1 The Manual SITRANS WW310 6 Operating Instructions 03 2014 A5E33490433 AA ...

Страница 9: ...Always follow established safe operating practices when working on or around the SITRANS WW310 especially in wet environments and when adjacent to conductive steel mounting framework Note A weighfeeder can be dangerous Pinch points exist along the conveyor belt line Secure the weighfeeder when replacing the belt working on or around the load cell s working on or around the speed sensor working on ...

Страница 10: ...Safety notes 2 1 Safety and General Precautions SITRANS WW310 8 Operating Instructions 03 2014 A5E33490433 AA ...

Страница 11: ...IP67 rated Non linearity 0 03 Non repeatability 0 02 Speed sensor Industrial duty digital optical encoder tail shaft mounted Framework Cantilevered painted mild steel structural frame for quick and easy belt replacement Pulleys 200 mm 8 OR 300 mm 12 crowned with 6 mm min rubber lagging on drive pulley for maximum traction 200 mm 8 OR 300 mm 12 crowned tail Idlers Heavy duty 100 mm 4 CEMA C with pr...

Страница 12: ...Technical data 3 1 Specifications SITRANS WW310 10 Operating Instructions 03 2014 A5E33490433 AA ...

Страница 13: ...of the two inputs required for integration Unlike static weighing in motion weighing integration requires a second input a pulse signal proportional to the speed of the conveyor belt Each belt speed sensor pulse represents a fixed distance of belt travel Since the force measured by the load cell is represented as weight per unit length it can be multiplied by the distance of belt travel one speed ...

Страница 14: ...Operation 4 1 Weighfeeders SITRANS WW310 12 Operating Instructions 03 2014 A5E33490433 AA ...

Страница 15: ... 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 Note The frame of the weighfeeder needs to be grounded to ensure accurate signal processing to the integrator Do NOT remove the tagged load cell shipping bolt s until the installation is complete to prevent load cel...

Страница 16: ...recommended Step 1 Construct the necessary support framework to provide a sturdy rigid base Vibration isolators are recommended if the location is subject to moderate or heavy vibration Step 2 Align the in feed section of the weighfeeder with the discharge of the feed device Prevent twisting or misalignment that could induce stress on the weighing section Step 3 Install a gasket between the flange...

Страница 17: ...electric supply to the motor and or motor controller The AC or DC motor controller if present must be grounded to minimize noise to the electronic integrator Refer to the applicable wiring diagram to make all electrical connections between the electronic integrator and the weighfeeder Note Units with a plugged discharge switch should refer to the wiring diagram included in the CLS100 manual Step 8...

Страница 18: ... WW310 16 Operating Instructions 03 2014 A5E33490433 AA Step 9 Before starting the weighfeeder make a final check to see that the conveyor belt is free of all tools and foreign objects and that the infeed skirtboards are not pinching against the belt ...

Страница 19: ...Mechanical installation 5 1 Installation SITRANS WW310 Operating Instructions 03 2014 A5E33490433 AA 17 ...

Страница 20: ......

Страница 21: ...ing test sheet To calculate the test load or to change it refer to the integrator instruction manual 6 2 Zero Perform the zero calibration as described in the Calibration section of the integrator manual Note This calibration should be at least three belt revolutions or five minutes whichever is longer 6 3 Span The test load used in the calibration procedure is based on a set of factory sized test...

Страница 22: ...Calibration 6 3 Span SITRANS WW310 20 Operating Instructions 03 2014 A5E33490433 AA ...

Страница 23: ...SITRANS WW310 Operating Instructions 03 2014 A5E33490433 AA 21 Wiring 7 Note Standard wiring consult wiring diagrams for optional connections ...

Страница 24: ...Wiring SITRANS WW310 22 Operating Instructions 03 2014 A5E33490433 AA ...

Страница 25: ...elt tracking Page 26 8 1 Shear gate The shear gate on the inlet of the weighfeeder needs to be set to allow the maximum feedrate capacity required Consult your Siemens representative if feed rate changes are required 8 2 Skirtboards The skirtboards have been factory set to proper specifications Note that near the inlet the skirtboards are very close to the belt However toward the discharge end of ...

Страница 26: ... for reference This will be a reference when you re install the belt Loosen the telescopers to remove tension from the belt Step 3 Remove support posts on the belt change side and the belt side roller below the belt plow remove tension from the belt scraper and remove all other components for belt changing Note Skirtboard removal or adjustment is not normally necessary to perform belt removal or i...

Страница 27: ...se load cell damage Step 8 Reverse Step 7 Page 25 to Step 1 Page 24 to re install the same belt Note On a new replacement belt there may be an arrow printed on the underside of the belt This arrow indicates what direction the belt should rotate when it is installed If there is no arrow rotation of the belt may be in either direction Whenever a new belt is installed perform the belt tracking proced...

Страница 28: ... rollers Note Do not adjust belt tracking rollers they have been factory set Belt plow blades are adjustable vertically for proper contact to the belt belt tension is properly set Turn on the feeder and observe its tracking line on the head and tail pulleys If the belt is drifting toward one side of the feeder then adjust the telescoper on either side of the machine see Telescoper adjustment Page ...

Страница 29: ...e belt then compress or extend both telescopers and complete the belt tracking process again To avoid this problem extend one telescoper while compressing the other to obtain proper belt tracking 5 Re tighten the jam nut located on the telescoper to maintain the new telescoper position after completing the tracking procedure 6 If you are having problems tracking the belt consult your Siemens repre...

Страница 30: ...epresentative for assistance if you have any questions or problems 8 7 1 Removing old load cell Step 1 Confirm the new replacement load cell is correct and functional Using a digital volt meter or ohm meter verify that the resistance of the new load cell matches the resistance printed on the specification sheet that comes with the load cell If the resistances do not match the load cell may be dama...

Страница 31: ...Shipping screw Note Load cell may appear different than shown Step 3 Support the scale idler deck from below or above and remove the two top front load cell mount bolts Be careful not to move the idler as it is still attached to the load cell on the other side of the weighfeeder Step 4 Remove the two bottom load cell mount bolts Step 5 Remove the load cell off the feeder ...

Страница 32: ... the two top front load cell mount bolts Tighten them by hand Step 4 Start with the bottom load cell mounting bolts and tighten them to the torque rating specified with the new load cell Now tighten the two top front load cell mounting bolts to the same torque value Step 5 Route the load cell cable to the junction box and connect the load cell according to the supplied interwiring diagram Repeat f...

Страница 33: ...integrator manual for reference Record zero calibration procedure results Step 3 Span calibrate the unit using the integrator manual for reference Record span calibration procedure results Step 4 Re check zero calibration Run another zero calibration and record the results Verify that the zero repeated to the same value recorded in Step 2 Page 31 Step 5 Confirm calibration with material test as de...

Страница 34: ...ection Secure bolts with idlers aligned and load cells level Align both sides and secure load cells in unison Alignment string wire Run string to ensure idler alignment on both sides to 1 32 Use spirit level to level load cell on each side 8 9 Quick start up overview 1 Verify that the weighfeeder is installed properly as described in Mechanical installation Page 13 Verify that the belt is tracking...

Страница 35: ... Drift non repeatability or non linearity Check for the following conditions weigh idler alignment Verify weigh idler alignment is as accurate as possible Improper alignment is the most common mechanical problem affecting scale accuracy Contact your Siemens representative if you find a problem here Note Alignment should be 1 32 0 8 mm 0 0 mm aligned with slider bars retreat and approach material b...

Страница 36: ...Troubleshooting 9 1 Mechanical troubleshooting SITRANS WW310 34 Operating Instructions 03 2014 A5E33490433 AA ...

Страница 37: ...fy alignment is recommended 10 1 1 Recommended Preventative Maintenance Schedule Item Required Maintenance Frequency Comments Weigh Section Blow or brush off any material building up on load cell area Weekly More frequently in dirty environments Belt Tracking Visually inspect to assure that conveyer belt remains trained Daily Integrator controller Span check Monthly Use calibration chain Calibrati...

Страница 38: ...or ragged edges on the belt will create performance problems Replace the belt if it becomes ragged or torn 10 3 Lubrication All head and tail pulley bearings are pre greased at the factory These bearings should be field greased periodically Lubrication frequency may vary dry dusty applications may warrant weekly greasing while less harsh applications may need greasing only once or twice a year Do ...

Страница 39: ...ces liberally with an appropriate lubricant to help with reassembly In addition fill the gear reducer with an appropriate gear oil to prevent oxidation When the equipment is re installed completely drain this gear oil and then refill the reducer to the appropriate level 10 4 3 Electrical To prevent oxidation place a desiccant or moisture removal material in all electrical junction boxes and compon...

Страница 40: ...Maintenance 10 4 Weighfeeder storage recommendations SITRANS WW310 38 Operating Instructions 03 2014 A5E33490433 AA ...

Страница 41: ...11 1 8 pulley open unit Open unit dimensions Belt Width A Nominal B C 457 mm 18 1143 mm 45 406 mm 16 813 mm 32 610 mm 24 1295 mm 51 482 mm 19 965 mm 38 762 mm 30 1448 mm 57 558 mm 22 1118 mm 44 914 mm 36 1600 mm 63 635 mm 25 1270 mm 50 1067 mm 42 1753 mm 69 711 mm 28 1423 mm 56 ...

Страница 42: ...433 AA 11 2 8 pulley enclosed unit Enclosed unit dimensions Belt Width A Nominal B C 457 mm 18 1143 mm 45 914 mm 36 813 mm 32 610 mm 24 1295 mm 51 1066 mm 42 965 mm 38 762 mm 30 1448 mm 57 1219 mm 48 1118 mm 44 914 mm 36 1600 mm 63 1371 mm 54 1270 mm 50 1067 mm 42 1753 mm 69 711 mm 28 1423 mm 56 ...

Страница 43: ...4 A5E33490433 AA 41 11 3 12 pulley open unit Open unit dimensions Belt Width A Nominal B 457 mm 18 1092 mm 43 838 mm 33 610 mm 24 1245 mm 49 991 mm 39 762 mm 30 1397 mm 55 1143 mm 45 914 mm 36 1549 mm 61 1295 mm 51 1067 mm 42 1702 mm 67 1448 mm 57 1219 mm 48 1854 mm 73 1600 mm 63 ...

Страница 44: ...14 A5E33490433 AA 11 4 12 pulley enclosed unit Enclosed unit dimensions Belt Width A Nominal B 457 mm 18 1092 mm 43 838 mm 33 610 mm 24 1245 mm 49 991 mm 39 762 mm 30 1397 mm 55 1143 mm 45 914 mm 36 1549 mm 61 1295 mm 51 1067 mm 42 1702 mm 67 1448 mm 57 1219 mm 48 1854 mm 73 1600 mm 63 ...

Страница 45: ... Zero 19 D Drive 9 E Electrical storage 37 F Feedrate 23 Framework 9 G Gear motor 36 storage 37 Gear reducer 36 storage 37 General maintenance 36 Grounding 13 I Idlers 9 Inlet 23 In motion weighing 11 Installation 13 integrator 19 Integrator 5 11 19 30 32 L Load cell care 37 Load cells 9 11 Lubrication 36 storage 37 M Materials 9 O Operating range 9 Operating temperature 9 P Preventative maintenan...

Страница 46: ...f flow 11 Replacing load cells 28 S Safety 7 Shear gate 23 Skirtboards 23 span calibration 19 Specifications 9 Speed sensor 9 Static weighing 11 Storing a weighfeeder 37 T Test load 19 Test weights 5 U Units 11 W Weigh bridge 5 Weighfeeders How they work 11 Z zero calibration 19 ...

Страница 47: ......

Страница 48: ...siemens com level For more information www siemens com processautomation Siemens AG Industry Sector 1954 Technology Drive P O Box 4225 Peterborough ON Canada K9J 7B1 Subject to change without prior notice A5E33490433 Rev AA email techpubs smpi siemens com Siemens AG 2014 A5E33490433 ...

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