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Milltronics MMI Belt Scale – INSTRUCTION MANUAL

7ML19985DR02

Flat Idler

idler modification

idler installation

In most applications standard
conveyor manufacturers’
brackets cannot be used,
replacement brackets (as
shown) are needed.

12.7 mm

(0.5”)

customer’s idler

after

before

customer bolts

(4 places)

idler clip

«
...
18
19
20
21
22
...
»

Summary of Contents for Milltronics MMI

Page 1: ...Instruction Manual September 2006 MMI BELT SCALE MMI BELT SCALE milltronics ...

Page 2: ...urage users to purchase authorized bound manuals or to view electronic versions as designed and authored by Siemens Milltronics Process Instruments Inc Siemens Milltronics Process Instruments Inc 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 for agreement with the instrumentation ...

Page 3: ...5 Installation Precautions 5 Installation Procedure 6 General Installation Requirements for Legal for Trade Applications 10 Calibration 11 Test Load 11 Zero 11 Span 11 Material Test 12 Re Rating 12 Maintenance 13 Idler Mounting 14 Troughed Idler With Channel Spine 14 Troughed Idler With Pipe Spine 15 Flat Idler 16 MMI Wiring 17 Outline Dimensions 18 ...

Page 4: ...ii ...

Page 5: ...tion control inventory accountability or where certification for trade purposes is required The MMI is an accurate and repeatable force sensor Its performance is ultimately dependent upon the conveyor system and the quality of the installation and alignment Safety Notes Special attention must be paid to warnings and notes highlighted from the rest of the text by grey boxes The Manual This instruct...

Page 6: ...Capacity Maximum ranges 50 100 250 500 750 1000 lb Overload Maximum 1000 of rated capacity Temperature 40 to 85 C 40 to 185 F operating range 15 to 65 C 0 to 150 F compensated Belt Width 18 to 96 in 1 increments to suit CEMA sizes equivalent to 500 to 2000 mm in metric sizes Refer to Outline Dimensions on page 18 Belt Speed Up to 4 m s 800 fpm Capacity Up to 5000 t h 5500 STPH at maximum belt spee...

Page 7: ...age 3 Weight See chart Outline Dimensions on page 18 Hazardous Locations With the use of approved Intrinsically Safe barrier strips Approvals CSA certified for general purpose Legal for Canadian Trade Measurement Canada approved Legal for US Trade NTEP approved ...

Page 8: ...material to the load cells These are the active components in the weighing assembly As the material travels along the conveyor belt a force is exerted through the suspended idler onto the weighing assembly The weighing assembly is forced down proportionally The movement in each load cell is sensed by its strain gauges when excited by voltage from the electronic integrator and produces a signal pro...

Page 9: ...d or by referring to the Belt Scale Applications Guidelines 7ML19985GA01 Welding Load Cell Handling The load cell can tolerate very little negative displacement without damaging the load cell When handling the individual MSIs install both shipping stops to their vertical position to protect the load cells Do not lift the MSI by the dynamic frame or subject it to shock from blows of a hammer when t...

Page 10: ...L19985DR02 Installation Procedure 1 Remove the conveyor idler currently at the desired point of installation 2 Remove the idler foot plate and modify the idler frame at both ends of the idler as shown below 12 7 mm 0 5 100 mm 4 customer s idler before after ...

Page 11: ...s so that they are centered and square to the stringer Mount the modified idler so that it is centered on the scale using the idler clips Tighten all mounting hardware Refer to Idler Mounting on page14 for alternate idler mounting arrangements Position the scale so that the large arrow on the scale mounting brackets is pointing in the direction of material flow Note Be sure there is sufficient cle...

Page 12: ... in the weighing area must be properly aligned and leveled by shimming the scale idler S the two approach A and the two retreat idlers R until they are within 0 8 mm 1 32 of each other Be sure to check that the idlers are centered and squared to the conveyor during the shimming process B shoulder bolts shipping stop shipping stop A screws C C 90 center of idler to be in line material flow idlers m...

Page 13: ...re or string must be able to withstand sufficient tension in order to eliminate any sag Adjust shims so that all rolls of the A2 through to the R2 idlers are in line within 0 8 mm 1 32 Although the accepted tolerance for idler alignment is 0 8 mm 1 32 the scale mounted idler should never be lower than the adjacent idlers Establishing good idler alignment is the most important part of the installat...

Page 14: ...erably in a control room not subject to direct sunlight 2 Stringer Requirements a The MMI Scale shall be located close to a vertical conveyor support where conveyor stringer deflection is near zero b The conveyor Stringers in the scale area should be strong enough to limit relative deflection to 0 8 mm 1 32 c The conveyor stringers must be straight to prevent any belt tracking problems 3 Conveyor ...

Page 15: ... load must be recalculated as follows Failure to do so will cause the design test load value to be in error test load Total weight of all test weights Kg or lb idler spacing m ft The above calculation must be performed for each MSI scale suspension using the weights designated for that particular suspension Enter the average value of the two calculations into the integrator s Test Load Parameter t...

Page 16: ...sting conditions are such that the installation of the scale cannot meet the above mentioned requirements for an approved installation it is recommended that Material tests be performed This will enable the user to compare the present scale results to the results of the material tests The scale is then adjusted or factored so that subsequent scale calibrations with test weights will agree with act...

Page 17: ... up operation proper material feeding and spillage control You can observe the integrity of the load cells by performing zero and span calibrations If the zero and span deviations display a continuous unidirectional drift or the system becomes uncalibratable for no apparent mechanical reason the load cells may be suspect Spare Parts The only spare part recommended for the MSI is the load cell Refe...

Page 18: ... The idler depicted in the Installation Procedure section on page 6 uses an angle iron spine The following images depict alternate idler construction and tips on how they should be modified and installed Troughed Idler With Channel Spine idler modification idler installation gusset reinforcementif required See Installation Procedure on page 6 12 7 mm 0 5 100 mm 4 customer s idler foot pads welded ...

Page 19: ...ne idler modification idler installation gussetreinforcement if required See Installation Procedure on page 6 12 7 mm 0 5 100 mm 4 customer s idler foot pads welded to idler spine after before customer bolts 4 places idler clip welded to idler pipe be sure idler is square to scale conveyor frame ...

Page 20: ...7ML19985DR02 Flat Idler idler modification idler installation In most applications standard conveyor manufacturers brackets cannot be used replacement brackets as shown are needed 12 7 mm 0 5 customer s idler after before customer bolts 4 places idler clip ...

Page 21: ...Load Cell A Load Cell B MSI 1 MSI 2 MSI 1 Load Cell B Load Cell A To integrator E X C E X C S I G A S I G A S H I E L D S I G B S I G B DETAIL A belt travel DETAIL A belt travel E X C E X C S I G A S I G A S H I E L D S I G B S I G B r e d A r e d B b l k A b l k B w h t A g r n A w h t B g r n B s h l d A s h l d B r e d A r e d B b l k A b l k B w h t A g r n A w h t B g r n B s h l d A s h l d ...

Page 22: ...9 25 743 mm 9 5 241 mm 5 5 140 mm 7 178 mm 90 lbs 41 kg 30 762 mm 39 991 mm 35 25 895 mm 9 5 241 mm 5 5 140 mm 7 178 mm 99 lbs 45 kg 36 914 mm 45 1143 mm 41 25 1048 mm 9 5 241 mm 5 5 140 mm 7 178 mm 107 lbs 49 kg 42 1067 mm 51 1295 mm 47 25 1200 mm 9 5 241 mm 5 5 140 mm 7 178 mm 116 lbs 53 kg 48 1219 mm 57 1448 mm 53 25 1353 mm 9 5 241 mm 8 203 mm 7 178 mm 125 lbs 57 kg 54 1372 mm 63 1600 mm 59 25...

Page 23: ...IQ300IX fm Page 5 Tuesday October 2 2001 1 43 PM ...

Page 24: ...ltronics Process Instruments Inc 1954Technology Drive P O Box 4225 Peterborough ON Canada K9J 7B1 Tel 705 745 2431 Fax 705 741 0466 Email techpubs smpi siemens com Siemens Milltronics Process Instruments Inc 2006 Subject to change without prior notice Printed in Canada ...

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