Home

OPERATION & INSTALLATION MANUAL

1. X gt lt OO dl SPEED SENSOR TACHO THE POSITION OF THE SLIDER SWITCH HAS BEEN FACTORY ADJUSTED AND DETERMINES THE OUTPUT OF THE TACHO THIS SETTING SHOULD BE CHECKED AGAINST THE DATA SHEET PRIOR TO COMMISSIONING J3 TERM DG SCREEN TO MASTERWEIGH 5 J3 TERM DG OV GND ELECTRONICS J3 TERM SUPPLY J3 TERM SIGNAL REVISIONS 26 10 98 ORIGINAL ISSUE WEB TECH AUSTRALIA PTY LTD ACN 010 764 431 DRAWING No DRAWN L HARTLEY ooo ams E A BEE LHARTLEY Phone 61 7 3841 2844 Fax 61 7 3841 0005 SE n m TACHO S S JUNCTION BOX ae S WIRING WITH MULTIPLICATION amp e CONNECTIONS TO MASTERWEIGH 5 INTEGRATOR mu This drawing and any information or descriptive matter set out hereon are the confidential PTY LTD used for manufacturing tendering permission IF IN DOUBT ASK ALL DIMENSIONS IN MILLIMETRES UNLESS OTHERWISE SPECIFIED and must not be disclosed loaned copie or for any other purpose without their wri SPEED SENSOR TACHO JUNCTION BOX CABLE SUPPLIED BY CUSTOMER CABLE TO BE BELDEN 3 CORE PART Na 8770 OR EQUIVALENT CABLE INTEGRAL TO SPEED SENSOR _____ _____ ___ E
2. 110 0 840 FIXED PULLEY WITH FLANGE UNIT EXAMPLE 1 TO MASTERWEIGH ENCLOSURE 110 0 0 840 274010 MASTERWEIGH ENCLOSURE FIXED PULLEY WITH PLUMMER BLOCK MOUNTING EXAMPLE 2 5 d 518 110 0 840 ADJUSTABLE PULLEY SCREW TAKE UP ENCLOSURE USING TAKE UP BEARING UNIT EXAMPLE 3 110 0 TORQUE ARM MOUNTED TO EQUIPMENT TO MASTERWEIGH ENCLOSURE ROTARY SHAFT ENCODER ASSEMBLY MOUNTED DIRECTLY TO PULLEY EXAMPLE 4 15 CLEARANCE HOLE 5 8 22 84 TYPICAL SHAFT EXTENSION WITH SPRING COUPLING Eas HOLES 9120 1350 END ELEVATION NOTES THIS DRAWING SHOWS TYPICAL EXAMPLES ONLY IT IS RECOMMENDED THAT THE ROTARY SHAFT ENCODER TACHO AND SPRING COUPLING BE SHROUDED TO PROTECT AGAINST MECHANICAL DAMAGE EXAMPLE 5 BRACKET COUPLING BOLTS TO BE LOOSENED BEFORE ADJUSTING PULLEY TAKE UP TO ALLOW FOR THE REALIGNMENT OF THE SHAFT FOLLOWING ADJUSTMENT ENCODER AND RETIGHTENED 3 1 TORQUE ARM WEB TECH SUPPLY ROTARY SHAFT ENCODER TACHO WEB TECH SUPPLY 111 5 8 S S SPRING
3. 4 INSTALLATION MANUAL WTE22 E2800 Belt Scale with Masterweigh 5 Integrator Web Tech Australia Pty Ltd Head Office Sydney Office 11 Electronic Street PO Box 4006 Phone 02 9757 2296 EIGHT MILE PLAINS QLD 4113 EIGHT MILE PLAINS BRISBANE QLD 4113 Phone 07 3841 2844 AUSTRALIA Fax 07 3841 0005 Email webtech G onaustralia com au wr Section 1 2 Web Tech Australia Pty Ltd TABLE OF CONTENTS Description Unpacking the Equipment Belt Scale Installation Guide Weighframe amp Electronics Installation Getting Started Belt Scale Maintenance Masterweigh 5 Operation Drawings Addendum Calibration Sheets Model 22 Belt Scale Unpacking MODEL WTE22 UNPACKING EQUIPMENT PACKING 1 WEIGHFRAME The weighframe is shipped in a timber crate and is retained by bolts in the floor of the crate Remove these bolts before attempting to lift out the weighframe 2 ELECTRONICS The Masterweigh or Optimus electronics and enclosure are shipped in a separate cardboard box When removing the packing be sure to check for any documentation that may be supplied within the box 3 BELT SPEED SENSOR The belt speed sensor is normally shipped in the same box as the Masterweigh or Optimus electronics 4 CALIBRATION WEIGHTS The calibration weights if supplied are shipped in the same crate as the weighframe They are also bolted to the floor 5 WEIG
4. CALIBRATION POSI l N 222 aM lt Far 7 54 HH o SS 8 1486 a N SALES 7 DR TONY BERNARDI CHECKED APPROVED Ss mE DATE APP D EB TEC T SCALE OADCELI MACHNNG 01 02 03 05 10 SCALE 1 5 r G NGEMEN FABRICATION 05 05 05 10 20 NOT SCALE F IN DOUBT iL REG sos eos ASK SE SPECIFIED Addendum ADDENDUM The following addenda are applicable to the equipment supplied for this contract Page 1 WEB TECH AUSTRALIA LTD Conveyor Designation Model Tacho Data Software Version Contract No MENU FUNCTION MASTERWEIGH 5 SETTINGS 1 Parameter Setup Capacity Increments Size Pulse Time On Zero Reference Precision Reference 2 Pulses per Belt Programmed Pulses per Belt Revolution Revolution No of Belt Revs Zero Calibration Zero Calibration mV AutoZero Tracking mV 5 Emperical Span Empircal Span Null Level Null Level 7 Auto Zero Auto Zero Level Auto Zero Period Tracking Delay Time secs Fixed Weight Span Target Weight Calibration Loadcell Input Dynamic No L
5. Here the time based reporting period is displayed and may be modified The time period entered here will cause the Masterweigh 5 to automatically print a report via the serial port every time the period expires ie a report period of 4 hours will cause a report to be automatically printed at midnight 4 am 8 am noon 4 pm 8 pm etc Pressing enter here returns to step 1 above Pressing Enter when report mode is Total based advances to 3 100 tonnes 0 tonnes Report every Enter new value Here the total based reporting increment is displayed and may be modified mass total increment entered here will cause the Masterweigh 5 to automatically print a report via the serial port every time the increment is added to the mass total ie a total increment of 2500 tonnes will cause a report to be automatically printed at 20000 tonnes 22500 tonnes 25000 tonnes 27500 tonnes etc Pressing Enter here returns to step 1 above The RS232 Parameter are Baud 19200 bps Data bit 8 bits Stop bit 2 bits Parity None MENU ENTRY 16 Report Printing Menu optional Masterweigh Operation OP 23 RESETTING MASTERWEIGH 5 Under some circumstances Masterweighs memory can be corrupted so that correct operation of the unit is not possible This condition can occur if Masterweigh has been subjected to severe electrical noise or spikes These phenomena usually occur on 240 110V AC power lines however they can also appear o
6. J5 J6 COM NO NC COM NO NC P P SHD TG TIN TE A AG L L E E SHD GND TxD RxD Com Rx Rx LIMIT SE T O 65932 Ste Z B8o a HEH SG u m O lt U X z Z m 2 6 PES lt a INTERCONNECTION CABLE TO BE FOUR 4 CORE SCREENED LOAD CELL S CONTAINED WITHIN oe LAC VEIGHFRAME RED 0 11 Amp 240V BLACK y 0 2 Amp 120V REMOTE TOTALISER SCREEN p OPTIONALLY SUPPLIED GREEN 2nd LOAD CELL DEPENDANT 12345678 w a a a ON SERIES OF WEIGH FRAME REMOTE RATE METER BLACK T OPTIONALLY SUPPLIED SCREEN J3 DG TIN 4 5 INTERCONNECTION CABLE TO BE SE SPROCKET MOUNTED I T THREE 3 CORE SCREENED OPTIONAL SUPPLY END OF IDLER ROLL 5 SUPPLIED BY OTHERS 0 1 ji JUNCTION BOX SSC A Bc NOTES Dr OPTIONAL SUPPLY i u 5188 1 2 BELT SCALE SYSTEMS REQUIRE EITHER ONE 885 OFF BELT SPEED SENSOR OR ONE JUNCTION BOX MAGNETIC PICKUP DETAIL 7 OFF MAGNETIC PICK UP APPROX 2m OF CABLE BELT SPEED SENSOR TACHO OPTIONAL SUPPLY SUPPLIED WITH SENSOR 099 2 gt US
7. of entry Masterweigh displays the following if no entry has been previously entered GETTING STARTED Menu entry 7 Zero track if lt 20 0 4 revs This display tells us that Masterweigh will automatically force itself to read zero when the recorded mass rate is less than 20 tonnes per hour and stays below that value for the duration of five belt revolutions Should material start to flow Masterweigh immediately cancels the Autozeroing and works with previously set values As some conveyors experience surges of material then run empty as part of the plant s normal operating conditions Masterweigh can if instructed delay any autozeroing process for a predetermined time To enter the Autozero menu press the Enter key and the display will change to the following Autozero level 20 000 tonnes hour Enter new level 0 000 At this point a new mass rate level can be entered Note this level should be sent at approximately 2 of the maximum flow rate On pressing the Enter key again the display will change to the following Autozero period 5 revs Enter new period WTE22 Belt Scale GETTING STARTED CONTD It is best to set this to the same number of belt revolutions as when the zero and span were set However fewer whole revolutions can be used if preferred Note by entering 0 into this entry the Autozero mode is switched off If the Enter key is press
8. the Masterweigh Control of the Autozero Alarm relay is achieved from this menu The auto zero mode will not be entered or continue unless the mass rate remains below the specified level The value is normally set at approximately 1 5 of capacity A qualifying time delay period is also provided to ensure that the belt is completely free of material Should it be necessary to clear the present auto zero value then this can be done by entering Menu 3 load zero calibration then aborting after starting the test A z will be displayed at the right hand side bottom line of the main mass rate mass total display when the auto zero conditions are met and the Masterweigh is collecting data for a possible new zero level Note The auto zero tracking procedure is inhibited under the following conditions Masterweigh not in mass rate mass total display mode amp Input tacho frequency less than 5Hz It may be required that the user wishes to know if the Autozero function is being forced to zero out belt zero errors which could be considered as abnormal This is achieved by setting a window around the signal being returned during any period that the belt is considered to be running empty by the computer The window is set in this menu at step 5 amp 6 If the signal from the load cell falls outside these user preset levels then the Autozero limit alarm relay will energise Under some circumstances it may be necessary to
9. 4 Zero reset To Start zero cal Press E Mass rate 0 000 Revs 0 0 To Abort zero calibration Press A Mass rate 0 000 Revs 0 0 6 To calculate new calibration Press E Mass total 1 150 Revs 10 DN Zero error 2 756 millivolts Press E to save otherwise press A MENU ENTRY 3 1 At Menu Entry 3 press Enter to proceed 2 Optional Using a digital voltmeter measure the belt zero error value in millivolts at the loadcell or read the mV level displayed in menu 8 Manually key in the value to the Masterweigh and press the Enter key to accept Otherwise press Enter with no data entered to continue with no change Note that entering this value does not negate the need to perform a zero calibration 3 The live zero error is now displayed as a mass rate Press Enter for the loadcell calibration procedure 4 The mass total will now display zero Check that the belt is empty then press the Enter key to begin the zero calibration test 5 The difference between the current loadcell zero and the actual load reading is accumulated over the test duration which is the total number of belt revolutions specified in menu 2 The test can be aborted at any time by pressing the Abort key If the test is aborted the working copy of the load zero is reinitialised from the stored load zero calibration value This working copy normally includes contributions from both the load zero calibration as car
10. supply is rated at 200mA maximum and is overload and short circuit proof with fold back current limiting It may be necessary to briefly remove all load after removing a short circuit in order to reset the protection circuit Short circuiting of the tacho 5 volt supply will not affect the Masterweigh CPU operation Masterweigh is fitted with a potentiometer RV2 to adjust the tachometer s 5V rail if required Normally only used when the tacho supply drops to a voltage where tachometer ceases to work owing to significant voltage drop from long cable runs IS barriers or the like CAUTION Application of external voltage source to the tacho supply terminals may cause damage to the Masterweigh FACILITIES AVAILABLE b Frequency Selection The tacho generator should be selected and fitted to provide a frequency input to the Masterweigh within the range 5 to 1000 Hz to ensure compatibility amp accurate measurement The tachometer is normally selected for the user by the factory Selection depends on rotational speed of the pick up pulley which in turn is supplied by the user Note that the tacho frequency has no affect on the rate at which the load cell signal is sampled Pulse Output The Masterweigh provides a pulse output for external accumulation of the mass total Masterweigh provides for three methods of indicating when an increment Masterweighs total has occurred 1 An Internally Generated
11. COUPLING 5 5 WEB TECH SUPPLY QTY PART NUMBER No SIZE DESCRIPTION LENGTH MAT SPEC WEIGHT REMARKS 5 UNLESS OTHERWISE STATED v WEB TECH AUSTRALIA PTY LTD SIZE DRAWING No UNTOLERANCED DIMENSIONS NUMBER SHT REV SIS BE THE LIMITS SHOWN CHECKED 11 BECIRONCS STREET MLE PLANS QUEENSLAND 413 AUTRAUA P O BOX 4006 EIGHT MILE PLAINS QUEENSLAND 4113 AUSTRALIA e EE P al Ga S wr5013 00 E 8 TITLE CONTRACT e 88 l3 vna TYPICAL INSTALLATIONS ROTARY Zeches ec lee E _ SHAFT ENCODER IN CONJUNCTION po 5 E Su CAD FILE SE gees er Ge WITH CONVEYOR BELT SCALES al 8 259 al Sal 95 IF IN DOUBT ALL DIMENSIONS IN MILLIMETRES 25 ASSEMBLIES ASK UNLESS OTHERWISE SPECIFIED ALTERNATING ALTERNATING AND LINE 1 COLUMN 40 LINE 2 COLUMN 34 LINE 2 COLUMN 56 LINE 2 COLUMN 40 23 45 67 8 9 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 5 8 1 0 10 tloininje 8 1 515 0 0 5 ASTERIX ASTERIX T E OR T NOTES SYMBO
12. J3 TERM DC SCREEN TO MASTERWEIGH 5 Z 93 TERM DG DN GND ELECTRONICS J3 TERM 45V SUPPLY TERM T SIGNAL WEB TECH AUSTRALIA PTY LTD DRAWING Ne ACN 010 784 431 ome ume Ee m Phone_ 61 7 3841 2844 1 7 241 000 S S JUNCTION BOX WIRING WITHOUT MULTIPLICATION 4 REVISIONS ALL DIMENSIONS IN MILLIMETRES UNLESS OTHERWISE SPECIFIED a z H 2 gt g LOADCELL 1 LOADCELL JUNCTION BOX LOADCELL J BOX TERMNATION BOARD ann wnt sew LOADCELL 4 5 SOME LOADCELLS DON T HAVE SENSE WIRES IF THE LOAD CELL HAS SENSE WIRING TERMINATE AS SHOWN OPTIMUS DOES NOT REQUIRE SENSE WIRING UNLESS OTHERWISE STATED UNTOLERANCED DIMENSIONS BE MaN ts Sow beet WC soo coe ne e eleng bes S S ore sero ramas as pas su n na vn ASK SIGNAL SIGNAL EXCITATION 0 ELECTRONICS EXCITATION SCREEN WIRING amp SUPPLY BY OTHERS CABLE BELDON 8723 OR EQIVALENT WEH TECH AUSTRALIA PTY LTD Aii TS DRAWING NUMBER 1 SMLCJE 04 LOADCELL J BOX WS CONNECTION DIAGRAM FOR VARIOUS TYPE LOADCELLS ALL DIMENSIONS IN MILLIMETRES UNLESS OTHERWISE SPECIFIED 2102 Kevin DRAWINGS Electrical Drawings unction Box Drawings 4 loadcell Marks design1 dwg 21 05 2004 3 48 59 LOADCELL
13. JUNCTION MOUNTED ON FEEDER LOADCELL J BOX TERMNATION BOARD LGAGCELL 1 LOADCELL 2 INDICATOR L ___ LI DEPENDING THE NODEL OF BELTSCALE FEEDER 1 2 LOAD CELLS MAY NEED BE CONNECTED LOADCELL 1 SIGNAL SIGNAL EXCITATION ELECTRONICS WRING FROM BELTSCALE FEEDER TO LOCAL JBOX EXCITATION SCREEN LOADCELL 2 NOTES SOME LOADCELLS DONT HAVE SENSE WIRES BELDDN 8732 OR EQUIVALENT IF THE LOAD CELL HAS SENSE WIRING TERMINATE AS SHEET te WIRING BY SETTERS SHOWN MW1 MWS OPTIMUS DO NOT REQUIRE SENSE WIRING no wx oxen oy Cim wer wer soc wc beso wa wx we we ___ _____ UNTOLERANCED DIMENSIONS CHECKED ug NUMBER SHT REV TO BE WITHIN THE LIMITS SHOWN 1 SMLCJB 02 1 B oes s sw s fone e EE 29 02 96 DRIGINAL ISSUE ALL DIMENSIONS IN MILLIMETRES UNLESS OTHERWISE SPECIFIED CA 5 2 11 12 B SPEED SENSOR J BOX WEB TECH SUPPLY 3 gt i EI STAINLESS STEEL MAGNETIC PICK UP EB TECH SUPPLY SPROCKET TO SUIT ROLL DIAMETER eg EB TECH SUPPLY NOTES 1 MOU
14. Mass Rate and Total Only neutral cure Silastic should be used if sealant is required MECHANICAL INSTALLATION WTE22 Belt Scale MECHANICAL INSTALLATION CONTD 15 Now the belt can be lowered and the belt take ups engaged It is a good idea to paint the idlers that are in the alignment zone a different colour from the non aligned idlers Signs should be posted warning maintenance personnel that the idlers in the alignment zone should not be adjusted or interfered with If the belt does not track properly and there are no alignment faults within the alignment zone adjust idler assemblies upstream and downstream from the zone 0 effect acceptable belt tracking Finally Note and remember that any roll that may fail in service must be replaced by a modified roll grub screw fitted and aligned if performance specifications are to be maintained MECHANICAL INSTALLATION WTE22 Belt Scale ELECTRICAL INSTALLATION ELECTRONIC ENCLOSURE It is advisable to mount the enclosure as close to the weighframe as possible The maximum cable length from weighframe junction box to the enclosure is approximately 150m However in our experience it is quite frustrating moving any distance between the weighframe and electronics during zeroing and calibration routines Fix the enclosure to a suitable post or wall It is advisable to select a position which is not subject to excessive vibration and is out of direct sunlight unless a
15. Section Potentiometer Adjustments RV1 LK4 LK5 Current loop supply These links select the power supply for the analog output current loop The supply can be an internally generated isolated 28VDC supply or an external supply of 20 to SOVDC Set the links to select the appropriate power source as follows USER CONFIGURATION Internally generated LK4 LK5 1 2 1 2 Externally generated LK4 LK5 2 3 2 3 LK6 LK7 LK8 LK9 Control Pulse Output Type These links select the power source for the totaliser counter pulse output Set the links to suit the external counter device Internally generated 5 VDC not isolated LK6 LK7 LK8 LK9 12 12 1 2 12 Internally generated 28 VDC Isolated LK6 LK7 LK8 9 1 2 12 23 2 3 Relay provided voltage free contacts LK6 LK7 LK8 LK9 23 23 23 23 CPU PCB Top Board LK1 When installed to the bottom Masterweighs digital communication is based on the RS232 protocol When installed to the top the digital communication is based on the RS485 protocol RS485 communications are only available if the main board has the relevent optional components installed LK2 Not user configurable Link 1 4 amp 3 6 or leave un linked Masterweigh Operation OP 29 POTENTIOMETER ADJUSTMENTS Power Supply Bottom Board RV1 Used to adjust the load cell excitation used in conjunction with a digital meter or the Masterweigh when menu 8 has been selected RV2 Us
16. Span calibration is complete If not press The display will now read New Span Factor xx xxx Press E to save Otherwise press A The span value should not change by more than around 1 If the span change is greater than 1 Abort the calibration amp check the weigh feeder for mechanical problems changes If the span change is within 1 record the new value amp press masterweigh will return to the normal operating display Steps 19 through to 24 should be repeated until the value in step 24 is 0 5 of the Target Weight If the span value is changed the final value should be recorded and the Calibration Data sheet updated REVISIONS 15 11 96 ORIGINAL ISSUE A CONTAINED WITHIN MASTERWEIGH ENCLOSURE 5 gt Ka 5 o 1 a o CH 2 4 2 D gt S 6 A NS m lt lt On Z 2 E 2 lt Y 205 Oe d 2 gt gt gt aoa 91 ud 2 2 gt gt a tw Di 9 Z m 2 Co 72 Co i 5 5 gt D W o o n o YW oo 2 2 2 Ex C qu n A J J J J J wd k n en quj u E E J J J J O lt 4 gt D gt Ll Lu Ll D DH 000 H 2 B I H H O 4 zl FS X lt lt lt lt x lt lt lt m m m c ac D J J J 1 8 7 J
17. is made in this menu Pressing Enter advances to Time 09 13 56am Enter new time HHMM Here the current time is displayed and may be modified A 4 digit time string of the form needs to be entered Where HH is the desired hours ie 12 03 etc and MM is the desired minutes ie 45 07 etc E g to enter 9 30 press 0 9 3 0 MENU ENTRY 14 Real Time Clock Menu Pressing Enter advances to 5 Time is currently am Press to change Enter to accept Here the current 12 hour time format postfix is displayed and may be modified The user can select either am Pressing Enter advances to 6 Date 29 6 94 Enter new date DDMMY Y Here the current date is displayed and may be modified A 6 digit time string of the form DDMMY Y needs to be entered Where DD is the desired days ie 27 04 etc MM is the desired months 1e 11 05 etc and YY is the desired years ie 94 Ol etc E g to enter 12 Feb 2000 press 1 2 0 2 0 0 Pressing Enter advances to 7 Day of the week Wednesday Press to change Enter to accept Here the current day of the week is displayed and may be changed by the user Pressing the or key toggles through the days of the week Pressing Enter advances to 8 Power of hours 1 Press Enter to continue Here a count of power on hours since the last unit re configuration is displayed This display is pro
18. not to continue Press E to continue 8 The display will request a new Calibration Zero to be entered Enter the value that is engraved onto the right hand side of the main pcb under the label Cal Zero then press E 9 The display will request a new Precision Reference Enter the value that is engraved onto the right hand side of the main pcb under the label Prec Ref then press E 10 Press M then E to return to normal running mode Remember If MW5 is reconfigured all calibration data is lost Keep Notes RESETTING MASTERWEIGH 24 Masterweigh Operation FACILITIES AVAILABLE Introduction The Masterweigh is a precision microprocessor based instrument for accurate integration of mass totals in belt scale applications The core highly successful Masterweigh 1 design has been in operation for many years and has been proven in the field and tested by the National Standards Authority of Australia The tests on the core proved that the instrument is accurate to 0 1 over its operating range The operating environment is based on a series of discrete Menus Each menu allows the user to set up a working environment or calibrate the system For a detailed description of each menu refer to Section OP 3 OPxx of the manual Note that detailed information relating to the keyboard operating command procedures is to be found earlier in this manual Load Cell Input and Excitation The Masterweigh is designed
19. sunshield if require contact Web Tech with details for pricing is fitted out of the way of running water during rain or hosing and easily accessible to an operator Note Close up the enclosure door to prevent ingress of water and dirt TACHOMETER INSTALLATION a General Refer to Dwg No s WT5013 Masterweigh uses the signal from the tachometer to calculate the belt speed The signal from the device is a train of 5 volt square wave pulses The pulses per revolution are selected by Web Tech to suit your conveyor s performance from the following range 100 500 1000 The tachometer selected will normally supply pulses at a rate of between 400 and 600 per second Masterweigh has been designed so that if the pulse rate exceeds approximately 900 per second they are automatically cut off therefore Masterweigh will read zero mass rate If ever necessary it is important to replace the tachometer with one with the same number of pulses per revolution b Tachometer Positioning The preferred position for the tachometer is the tail pulley The tail pulley has a large angle of wrap and because it is not driving it is unlikely to slip Its relatively large diameter is not normally affected by material build up also is less likely to be speed sensitive to the effects of belt thickness variations Whilst the tail pulley is normally subjected to harsh environmental conditions the Web Tech tachometer has been manufactured to co
20. the target weight first When the system is purchased from Web Tech a set of data referring to the Belt Scale parameters accompany the delivery see back of manual for a sample After entering your target weight and pressing the Enter key the display will change to the following Press E to continue Mass rate mmmm Where mmmm the current mass rate prior to span adjustment On pressing E once again the display changes to the following To start span calibration Press E Mass rate 0 0000 Revs 0 0 This display indicates that Masterweigh is ready to start and requires that the Enter key be pressed again On pressing the Enter key the display will change to the following To abort span calibration press A Mass rate m mmm Revs Where m mmm the current mass rate prior to calibration r r belt revs that have elapsed When Masterweigh has timed out the display will automatically change to the following To calculate new calibration Press E Mass total tt ttt Revs r r Where tt ttt Mass total r r Number of revs On pressing the Enter key Masterweigh uses the target weight and the found mass total to calculate it s new span factor NOTE The above calibration data will not be stored in the Masterweigh working memory until the following key sequence has been carried out 1 Press Menu 2 Press E Enter key If A lAbort i
21. to accept a load cell millivolt signal in the range 0 to 32 millivolts with a resolution of approximately 4 microvolts An on card voltage source provides excitation for the load cell This source can provide excitation for up to four 350 ohm load cells in parallel The excitation is not precisely controlled but is maintained within approximately 1 percent of the set value The Masterweigh monitors the excitation voltage and automatically compensates for any voltage change that may occur FACILITIES AVAILABLE The excitation is adjustable over a wide range to enable optimum performance to be obtained from a wide variety of load cells The Masterweigh may be configured to provide either a positive excitation voltage referenced to ground unipolar or a plus minus bipolar voltage by configuration of links The positive voltage is continuously adjustable from 4 to 12 volts The negative voltage is set at 12 volts The Masterweigh is factory set for a unipolar excitation of 10 volts Following adjustment of the excitation allow a minimum of 30 seconds for the Masterweigh to update its internal excitation reading before proceeding with calibration functions The approximate value of the excitation voltage sensed by the Masterweigh is displayed in Menu 8 This should match the voltage sensed at terminals J3 pin 12 and 13 if link LK3 is correctly installed and should be checked when configuring the Masterweigh Allow 30
22. total 120 000 Revs 10 New span factor 223 580 Press E to save otherwise press A 10 Seen only if span invalid 1 IER CU Fixed weight calibrate span 222 1 2 1 Press Enter when at Menu Entry 4 to Manual entry of Span Factor 0 000 proceed or press Enter to continue 2 Atthis stage the belt span factor can be set manually by entering the desired span factor 3 and pressing the Enter key If no value has Span Cal Mode Fixed Weight been entered then no change is made to the Press Clear to Change Enter to accept stored value and the next level is entered 3 Masterweigh 5 has been provided with two methods of spanning calibrating Fixed Current weight 120 8 tonnes Weight or Empirical Menu 5 Enter target weight 0 000 tonnes After initial calibration the user can by toggling Fixed Weight to R Cal perform a calibration verification An explanation of Press E to continue this procedure follows this text Mass rate 0 000 For initial calibration toggle this menu step to Fixed Weight by pressing the Clear C button if R Cal has been selected To Start span calibration Press E Mass Rate 0 000 0 0 To abort span calibration Press Mass rate 1543 000 Revs 1 507 MENU ENTRY 4 Fixed Weight Calibration Masterweigh Operation OP 9 MENU ENTRY 4 Fixed Weight Calibration cont d 4 The target weight is the mass total that is expe
23. value for the display filter constant may be entered 3 The 4 20mA mass rate output filter time constant is now displayed A new value for the mass rate output filter constant may be entered 4 The tachometer input filter is displayed here and a new constant applied if necessary Note At each step pressing the Enter key will save the new value If a new value has not been entered then the current value is unchanged MENU ENTRY 10 Modification of Filter Constants 18 Masterweigh Operation MENU ENTRY 11 Modification of Displayed Units The displayed units for mass may be selected from tonnes 165 tons and kgs The displayed units for mass rate will be the same as those selected for mass ie tonnes hour Ibs hour tons hour or kgs hour Menu entry 11 To modify display units Press E 2 lbs 4 tonnes 1 tons 3 kgs 1 Pressing the Enter key will advance to select mass units 2 At this stage the mass units which can be displayed are shown To select the mass unit required press the number key associated with it then press the Enter key The units number selected will be shown in the lower right hand comer of the display Numbers greater than 4 will not change the currently displayed mass total and mass rate units Pressing the Enter key without entering a new unit number or pressing Abort will not change the currently displayed units 3 Press Menu and Enter to save ME
24. 0 GETTING STARTED WTE22 Belt Scale GETTING STARTED Masterweigh is now ready to zero and will as soon as the Enter key is pressed again Masterweigh did not start executing its zeroing immediately because it gives time to make sure that the belt is empty most important After confirming that the belt is empty press the Enter key to start the zeroing The display will now change to the following To abort zero calibration Press A Mass rate a aaa Revs Where a aaa the zero error the number of revolutions completed Once Masterweigh has completed the test the display will change to the following To calculate new calibration Press E Mass total 7 777 Revs Where Z ZZZ the totalised value of the mass rate found during the routine x x the number of belt revolutions By pressing the Enter key at this point Masterweigh will calculate a new zero If something went wrong during the test e g material did accidentally get onto the belt pressing the Abort A key will cancel the test Following the pressing of the Enter key Masterweigh will display the zero as a voltage output from the load cell and once again give you the ability to cancel out the result Masterweigh will also cancel the tests if the results from that test fall outside preset limits See the section Load Zero Calibration in Masterweigh Operation GETTING STARTED Spann
25. 32 serial output Terminal GND Ground Terminal TxD Transmit Terminal RxD Receive RS 485 Serial Output Terminal Strip J6 Optional Feature Masterweigh 5 is provided with an RS 485 serial output Terminal Tx Transmit Terminal Tx Transmit Terminal Com Ground Terminal Rx Receive Terminal Rx Receive ELECTRICAL INSTALLATION WTE22 Belt Scale MECHANICAL TARE One of the advantages of using a torque tube is that the dead load can be supported thus allowing the whole positive range of the load cell to be used To mechanically tare the weighframe proceed as follows 1 Make sure that the connections in the junction box have been made and that all connections to Masterweigh have been made 2 Switch on Masterweigh and observe that the mass rate and total display appears 3 Using a digital multimeter of 3 1 2 digits or better and with the millivolt scale selected place the probes across the load cell positive green wire and the loadcell negative white wire If the Web Tech junction box is being used then red probe is placed on and the black probe on TP2 Remove links LK1 amp LK2 Now the load cell output has been isolated and the mechanical tare procedure can take place Observe the reading which should be 2 5mV If not then adjust the tare screw so that approximately 2 5mV is achieved 2 5mV 0 5mV By screwing in the tare screw the reading will decrease until i
26. 335 5 178 5 099 1 790mA Press to reset unit A current meter needs to be connected across pins 6 amp 7 of J3 and in series with the load if connected Masterweigh Operation OP 5 MENU ENTRY 2 Pulses per Belt Revolution Calibration This calibration is carried out with the belt moving The number of complete belt revolutions over a time period are counted by the operator and the Masterweigh counts the pulses returned from the speed sensor device The revolutions are then entered using the keypad and the pulses rev calculated by the Masterweigh and then saved To enable the revolutions to be counted a point on the belt should be marked with paint and a suitable point on the framework chosen close to the belt The count is then started as the belt mark passes this point and stopped as the mark again passes this point after the greater of 5 minutes or 5 belt revolutions 1 Menu entry 2 Pulse per rev 1000 Revs 5 2 Manual entry of Pulses Rev or press Enter to continue 3 Manual entry of N of Revs or press enter to continue 4 To start belt pulse count Press E Pulse counted Time To stop belt pulse count Press E Pulses counted Time Enter number of belt revolutions Pulses counted Time 7 Pulses belt revolution Press E to save otherwise press A 1 At Menu Entry 2 press Enter to proceed with calibration 2 If the pulses per rev are known then manually key in the numb
27. 5VDC Pulse 2 An Internally Generated 28VDC Pulse 3 Contact closure from an internal relay providing voltage free contacts Which of these options is used can be selected from links LK6 LK7 Lk8 and LK9 as shown in the USER CONFIGURATION section The pulse duration is adjustable in Menu 1 One pulse is output each time the least significant mass total digit displayed is incremented by 1 count A minimum of 20 milliseconds is guaranteed between pulses thereby providing a maximum pulse rate of 25 pulses per second 20 milliseconds on plus 20 milliseconds off The internal 5V supply is regulated to 5V It is not isolated from ground External load resistance should not be lower than 50 ohms Masterweigh Operation OP 27 FACILITIES AVAILABLE CONT D The internal 28V is unregulated and may vary over the range 25 35V It is isolated from ground to allow configuration of a fully isolated pulse output This 28V supply is shared with the 4 20mA analogue loop output and is rated at 400mA continuous maximum current The contact closure is completely isolated and is rated at 32V maximum and 500mA maximum It must not be used for 110V or 240V operation All pulse outputs are protected by 2 of 500mA fast blow fuses F2 and F3 Analog Output The Masterweigh provides one analog output channel The output operates over a 4 20mA range and provides a resolution of better than 0 5 It operates as loop powered config
28. AND KEY FUNCTIONS 2 Masterweigh Operation KEYBOARD LAYOUT AND KEY FUNCTIONS CONT D If the display is flashing the CPU fault status may be viewed by pressing the enter key in the MRMT display mode SPEED KEYS TOTAL RESET When this key is pressed MW5 clears accumulated mass total ZERO Activation of this key takes the operator directly to the belt zero function without having to scroll through the menu structure CAL When this key is pressed the operating display jumps to the fixed weight calibration function ready to span the system The blank key has been deliberately left in this condition as it is a key that will be assigned to user s requiring special functions ordered as option However if no options are required this key provides the user with a method of switching on and off the displays back lighting The action of this key overrides the normal timed function of the backlighting That is under normal operating conditions the back lighting will automatically switch off 5 minutes after the last keypad operation NUMERIC KEYS These keys are used to enter calibration data KEYBOARD LAYOUT AND KEY FUNCTIONS Masterweigh Operation OP 3 KEYBOARD LAYOUT AND KEY FUNCTIONS CONT D Menu is used firstly to enter the maximum capacity of the weigher and the precision of the remote counter pulse 1 Menu Entry 1 Parameter Set Up 2 Current capacity 1000 000 tonnes hou
29. Contact Terminal NOT Relax Normally Open Contact Terminal NC Relay Normally Closed Contact Pulse Output Terminal Strip J3 Masterweigh 5 provides a pulse output which can be used for remote totaliser PLC DCS The pulse output gives one pulse out each time the Main totaliser increments one count The type of pulse output can be selected as either SVDC 24VDC or Voltage Free Contacts by selecting the appropriate link configuration see elsewhere for details Terminal P Pulse Positive Terminal P Pulse Negative Belt Speed Sensor Terminal Strip J3 The belt speed sensor tacho is connected to terminals DG T and T Terminal DG Ground Terminal T Tacho Output Terminal T Tacho 5 VDC Supply Rate Output 4 20mA Terminal Strip J3 Masterweigh 5 provides a 4 20 mA analog output which can be used for remote rate meter PLC DCS The output is optically isolated Terminal A Negative Terminal A Positive Load Cell s Terminal Strip J3 Load cell s connections to Masterweigh are made via terminals AG L L E and E Terminal AG Load Cell Screen Terminal L Load Cell Output Positive Terminal L Load Cell Output Negative Terminal E Load Cell Supply Positive Terminal E Load Cell Supply Negative ELECTRICAL INSTALLATION WTE22 Belt Scale ELECTRICAL INSTALLATION CONTD RS232 Serial Output Terminal Strip J5 Masterweigh 5 is provided with an RS2
30. E EITHER GREEN OR WHITE CABLE DEPENDING a ru ON TACHO MODEL USED 5 APPROX 1m OF CABLE SUPPLIED WITH SENSOR DRAWN T BERNARDI WEB TECH AUSTRALIA PTY LTD DRAWING No Z Z CHECKED 11 ELECTRONICS STREET EIGHT MILE PLAINS QUEENSLAND 4113 AUSTRALIA NUMBER 5 amp aoa amp E 0 BOX 4006 EIGHT MILE PLAINS QUEENSLAND 4113 AUSTRALIA age Em S SEN Phone 461 7 384 2844 Fox 461 7 3841 0005 2 B TITLE CUSTOMER us B ELECTRICAL CONNECTION DIAGRAM FOR 325 g 5 BELT SCALE SYSTEMS are rud e 225 8 25985 INCORP MASTERWEIGH 5 INTEGRATOR REV RE Soe e zje 585 Thi i hereon ore the confidentiol Z 2 DOUBT ALL DIMENSIONS IN MILLIMETRES 6528 5 8158158 ASK UNLESS OTHERWISE SPECIFIED on manufacturing tendering SPEED SENSOR TACHO JUNCTION BOX COMPONENTS REMOVED FOR CLARITY RED SHIELD I BLACK OR BLUE OV GND L WHITE NRO WwW gt WwW A HIV SUPPLY 71 GREEN YR SIGNAL SHIELD CABLE SUPPLIED BY CUSTOMER CABLE TO BE BELDEN 5 CORE PART No 8770 OR EQUIVALENT CABLE INTEGRAL TO TACHO 9 G p C 2 1
31. Enter key to advance and the display will change to the following To start belt pulse count Press E Pulses counted 0 Time 0 You should now wait until the mark on the belt coincides with the selected reference point and as they coincide press the Enter key The display will now change to the following To stop belt pulse count Press E Pulses counted yyy Time Time elapsed since pressing the Enter key WTE22 Belt Scale GETTING STARTED Now Masterweigh is counting the pulses coming from the tachometer and the elapsed time When the minimum time or one belt rev has occurred then the Enter key is again pressed when the mark on the belt passes the reference point Note Web Tech advises using 5 belt revolutions assuming that 5 belt revolutions take longer than 5 minutes and that full belt revolutions only are used The display will now change to the following The display will now look like the following Menu entry 3 Zero cal 20 010 mV 0 010 mV Press the Enter key to gain access to the menu The display will now look like the following Enter number of belt revolution 0 Pulses counted Time Manual entry of zero error 0 000 Or press Enter to continue Where yyyy number of pulses counted the elapsed time in seconds You should now enter the number of complete belt revolutions When th
32. H IDLERS If weigh idlers have been supplied by Web Tech these will be packed on a separate pallet or skid STORAGE If the equipment is to be stored for a long period prior to installation we would suggest that the equipment be covered if in an outdoors situation EQUIPMENT DAMAGE If any equipment has been damaged in transit or some item s appears to be missing please contact Web Tech immediately Page 1 WTE22 Belt Scale MECHANICAL INSTALLATION NOTE Mechanical misalignment will cause the accuracy and repeatability of the system to be severely degraded After the location for the scale s weighframe has been selected using the previous chapter as a guide carry out the installation using the following method Refer to Dwg No s WTE22 and WTE22 1 which are at the end of this manual 1 Electrically isolate the conveyor 2 Lift the conveyor belt so that clear access is gained to idlers numbered 1 to 12 Remove idlers 4 5 6 7 8 and 9 Examine idlers 1 2 3 10 11 12 and check Replace if not sound Square up idlers 1 and 12 Elevate to approximately 1 2mm It is important that these two idlers be square with respect to the stringers and are securely bolted down prior to proceeding The measurement between idlers 1 and 11 divided by 11 will from there on be referred to as the pitch The pitch must be an achievable measurement over the 12 idlers under discussion The zinc plated brackets to wh
33. L LOCATION DESCRIPTION THE ALTERNATING 7 AND SIGNS IS INDICATION OF CORRECT OPERATION OF THE COMPUTER WHEN AN ASTERIX IS DISPLAYED THE HIGH SETPOINT RELAY HAS BEEN ACTIVATED WHEN AN ASTERIX IS DISPLAYED THE LOW SETPOINT RELAY HAS BEEN ACTIVATED WHEN THE SYMBOL 7 IS DISPLAYED MASTERWEIGH IS IN THE PROCESS OF AUTOZERO TRACKING IF THE SYMBOL E APPEARS REFER THE RELEVENT SECTION OF THE MANUAL REVISIONS 20 11 00 ORIGINAL ISSUE 0000 UNLESS OTHERWISE STATED UNTOLERANCED DIMENSIONS TO BE WITHIN THE LIMITS SHOWN NOMINAL SIZE DRAWING No TONY BERNARDI WEB TECH AUSTRALIA PTY LTD ACN 010 766 431 P O BOX 4006 EIGHT PLANS QUEENSLAND 4115 AUSTRALIA Phone 61 7 38 2844 Fuy 461 7 3841_ 0005 CHECKED APPROVED 7 MASTERWEIGH 5 INTEGRATOR FABRICATION DISPLAY FORMAT DO NOT SCALE IF IN DOUBT DATE APP D SCALE 1 ALL DIMENSIONS IN MILLIMETRES UNLESS OTHERWISE SPECIFIED ASK L gt EN E REVISIONS TO MASTERWEIGH 5 ELECTRONICS CABLE SUPPLIED BY CUSTOMER CABLE BE BELDEN 3 CORE PART Na 8770 OR EQUIVALENT J3 TERM SLD J3 TERM TG J3 TERM SCREEN OV GND SIGNAL SPEED SENSOR TACHO JUNCTION BOX CABLE INTEGRAL TO Iw vx WEB TECH AUSTRALIA PTY LTD pen vw ERE ee Aen Ee PICKUP JU
34. NCTION BOX WIRING CONNECTIONS MASTERWEIGH 5 T INTEGRATOR DO NOT SCALE IF IN DOUBT ALL DIMENSIONS IN MILLIMETRES UNLESS OTHERWISE SPECIFIED Web Tech AutoWeigh Manufacturers amp designers of bulk solids weighing amp proportioning systems Mining and mineral Aggregate cement and Food processing Recycled material processing building materials processing processing Web Tech AutoWeigh is a privately owned 2 Australian company specialising in the design Equipment supplied includes the following manufacture and servicing of continuous weighing and feeding equipment for all facets of industry Established in 1984 our head office and manufacturing facilities are located on the Technology Park at Eight Mile Plains just south of Brisbane CBD Queensland Weigh Belt Feeders Conveyor Belt Scales 1055 1 n Weight Feeders Screw Weighing Systems Volumetric Feeders Vibratory Feeders Metal Detectors Bulk Bag Un loaders Bin Weighing amp Level Systems Load Cells Conveyor Take ups Stainless Steel Cleaners We have a large range of standard equipment to suit most applications however we specialise in producing custom solutions to suit existing plant layouts and process requirements Retrofitting of older existing equipment is also a specialty Equipment manufactured by Web Tech AutoWeigh has been installed in countries worldwide including USA China Indonesia Malaysia Thailand Chile Arg
35. NT SPROCKET JUNCTION BOX ON ACCESS SIDE OF CONVEYOR 2 SPROCKET MUST BE MOUNTED CONCENTRIC TO IDLER ROLL ROTATE IDLER ROLL BY HAND TO CHECK RUN OUT 3 PROVIDE MECHANICAL PROTECTION FOR MAGNETIC PICK UP CABLE 4 AFTER ADJUSTMENT ENSURE LOCKNUT ON MAGNETIC PICK UP IS TIGHTENED 5 MAGNETIC PICK UP BRACKET MUST BE MOUNTED SO THAT MAGNETIC PICK UP AXIS 5 DIRECTLY IN LINE IDLER ROLL CENTRE MAGNETIC PICK UP BRACKET 6 DO NOT WELD SPROCKET TO IDLER ROLL WEB TECH SUPPLY 4 EE Sch WEB TECH AUSTRALIA LTD DRAWING No UNTOLERANCED DIMENSIONS 5 ER m WITHIN THE UMTS SHOWN CHECKED MPU e APPROVED 61 7 3841 2844 61 7 3841 0005 S B mm se um Dass STAINLESS STEEL MAGNETIC PICK UP BELT Zug ATE APP 03 01 9 P qp EE SPEED SENSOR AND ASSOCIATED SPROCKET o MACHINING 01 02 03 05 10 SCALE NIC EE GENERAL ARRANGEMENT FABRICATION 05 05 05 10 20 DO NOT SCALE dd IF IN DOUBT ALL DIMENSIONS IN MILLIMETRES copyright property oF WEB TECH AUSTRALIA PTY LIDO rn E05 re E EE e ASK UNGE GE OTHERWISE SPECIF TEN EE E V
36. NU ENTRY 12 Belt Speed Indication This entry displays the current belt speed in metres second or feet minute if the mass rate unit is in tons or lbs based on the total belt length in metres 1 Menu entry 12 Belt speed 3 10 metre second 2 Belt load 75 015 kg metre Press E to continue E Current belt total length 2 200 000m Enter new belt total length 0 000m Enter measured belt speed in metres min 0 000 Press E for belt length Calculated belt length 2 0 000 metres Press E to save otherwise Press A MENU ENTRY 11 amp 12 1 This entry shows the current calculated belt speed Press Enter once view the current belt loading 2 The current calculated belt loading will be displayed in the appropriate units Kg m or Lb ft depending on the mass units selected This belt loading is calculated from the current Mass Rate and belt speed 3 The current value for the belt length is shown If the belt length is known enter it here 4 If the belt length is not known and an accurate belt speed has been physically measured from the belt itself the Masterweigh can calculate the belt length Enter the measured belt speed in the units shown then press E to calculate the new belt length 5 If you entered a belt speed this value will be the calculated belt length If it seems correct Press enter to save the value or abort to ignore the calculation Note that if you entered a bel
37. ay will show zero no increment of the mass total will occur no pulses will be output to the e m pulse counter and the mass rate analog output will be set to 4 0mA Menu entry 6 Null level 20 000 tonnes hour 2 Max Mass Rate 230 195 Press C to Clear Press E to continue 3 Enter a new null level 0 000 Mass 230 497 tonnes hour 1 At Menu Entry 6 press Enter to proceed 2 Max Mass rate will latch on the highest mass rate value recorded automatically 3 Key in the new Value as observed in menu no 2 Press Enter when the data is correct Note on selecting the null level This entry is used to mask variations in mass rate caused by variations in the belt weight caused by the belt splice etc To select the null level observe the mass rate shown over several belt revolutions with the belt running completely empty ie no product or calibration weights Take note of the highest equivalent mass rate reached then enter a value slightly higher than this level Eg if the mass rate was swinging from 20 to 0 to 20 select 22 as the null level On a correctly installed and aligned weigher this figure should be approximately 196 of capacity MENU ENTRY 6 Null Level 14 Masterweigh Operation MENU ENTRY 7 Auto Zero Tracking This entry specifies the mass rate level below which automatic zero tracking occurs and the number of belt revolutions required before a new zero level is established
38. been activated then the display will switch off if any key has not been used within 5 minutes System Output Status A voltage free contact has been provided for remote monitoring of the Masterweigh autozero function If the autozero function returns a value that is outside the high and low limits that were set in Menu 7 the relay will energise It will remain energised until an operator initiated zero is performed in Menu 3 FACILITIES AVAILABLE 28 Masterweigh Operation USER CONFIGURATION Power Supply PCB Lower Board LK1 Grounding When the shunt is in position Masterweigh is referenced to ground When open Masterweigh is floating LK2 Excitation Selection This link allows the user to select either a unipolar or bipolar excitation voltage Refer also to Section Load cell Input and Excitation Unipolar OV is used for excitation voltages in the range 4 to 13 volts Selecting bipolar VE allows a plus minus excitation with a total voltage within the range 16 to 25 volts LK3 On Board Half Bridge This link allows use of input devices that have a half bridge configuration When linked for half bridge input micro the negative side of load cel input is disconnected from the terminal block J6 and instead connected to an on board half bridge circuit This half bridge is energised from the excitation as supplied to the external device The zero point is adjustable via RV1 Refer to
39. cted over the number of belt revolutions as currently set Menu 2 This target weight may at this point be changed to suit the calibration weights being used Note that this value will generally be determined by running this procedure and recording the result immediately after performing an empirical calibration Menu 5 A load zero calibration should generally be performed Menu 3 before running this procedure If a new value is entered then pressing the Enter key will save this as the new target weight If the Enter key is pressed without entering a target weight then no change to the stored value occurs 5 The current mass rate is shown the number of belt revolutions is zeroed Press the Enter key to start the test 6 Once started the test will run until the currently specified number of belt revolutions has been counted Refer to Menu 2 7 During this step the weight is totalised over the specified number of belt revolutions after which time totalisation is automatically stopped If the Enter key is pressed during the test then the totalisation will be terminated with a mass total of zero The test can be aborted at any time by pressing the Abort key 8 The resulting mass total is displayed along with the number of belt revolutions counted Press the Enter key to calculate the new span calibration factor 9 The new derived loadcell span is displayed Press the Enter key to save this value as the new loa
40. dcell span Press the Abort key if this value is not to be stored 10 Should the span value calculated be outside the range 0 1 to 3000 then the Masterweigh will display a warning message Under these circumstances the new span will not be saved and the unit will revert to the value previously stored Calibration Methods 1 Ideally conveyor belt scales should initially be calibrated using empirical data obtained from accurate static scales However in most situations this task is impossible to achieve but the fact remains that there is no substitution for data being input to Masterweigh 5 that has been derived from real material bearing down on the load cell via the weighframe carriage at representative speeds 2 A calibration chain a device that rolls on top of the belt provides the next best method of calibration and check calibration imparts load to the cells through the belt but can not simulate belt tensions as a fully loaded belt does 3 Static calibration weights are often used where a chain is impractical to use Bars of a known weight are loaded directly onto the weighframe and hence simulated a load This method does not take into consideration belt tension or weight transfer through the belt It does however exercise the weighframes mechanics 4 R Cal is an electronic method of checking the calibration A simulated loadcell signal is created by running the belt empty and electronically unbalancing the loadce
41. de then the display returns to MRMT format after 30 seconds If an invalid code is detected the display returns to MRMT format immediately If a security code is detected then limited or complete access is gained to the menus as appropriate Once the menu format is exited the code will have to be re entered for further access MENU ENTER KEY FUNCTIONS MENU This key switches between the main display mode showing Mass Rate Mass Total MRMT and the Menu mode AND D When in Menu mode pressing the key once will go forward or backward one menu entry If either key is held down the menu changes will repeat at a rate of approx 5 per second When entering the data the key is the decimal point ABORT When in the Menu mode and entering changes or new data this key enables the user to abort the changes and restore the existing entries top level menu screen is then displayed el Similar to Abort except that the current screen data only is cancelled and the existing entries restored The display remains at the current screen ENTER In menu mode the key accepts the default setting or confirms any data entered and moves to the next level in the operating sequence In MRMT display mode if the Enter key is pressed the current CPU central processor unit status is displayed and also the number of times the CPU has been restarted KEYBOARD LAYOUT
42. e correct number of revolutions have been entered press Enter key and now Masterweigh will calculate the number of pulses per revolution and the display will change to the following At this point you could enter that value you found in Menu 8 earlier See Mechanical Tare If you don t remember don t worry as Masterweigh will calculate it later Note that the entry of data at this point only assists Masterweigh in finding an average zero and does NOT negate the requirement to run the zero test Press enter again the display will change to the following Pulses per belt revolution Press E to save otherwise press A Press E to continue Mass rate a aaa By pressing the Enter E key the calculated data is stored in Masterweigh memory and will be used as a time base for zeroing and spanning calibrating The display will now return to Menu 2 entry display showing the new data If the A key was pressed no calculations would be done and the display would show previously stored data Zeroing Masterweigh Advance to Menu No 3 by pressing the key Where a aaa shows the current zero if the belt is running This data is raw that is not adjusted by the computer and will be changing frequently This information is mostly used by technicians Press the Enter key again and the display will change to the following Zero reset To start zero cal Press E Mass rate 0 000 Revs 0
43. e shown on the screen and totalised However the 4 20mA mass rate output signal will show 20mA for all mass rates above this value Note that units can be changed to tons Ibs or kg if preferred within Menu Entry 11 3 This step displays and allows alteration to the mass total increment This increment is used for both the mass rate and the mass total displays Enter the new value required and press the Enter key No change is made if Enter is pressed without data entry Note that the increment set is the increment required to cause one pulse output from the electronic counter Also do not change the increment in normal operation as the change insetting will invalidate any existing accumulated mass total 4 This step displays and allows alteration to remote counter pulse width this value is limited to between 20ms and 1000ms Note the value entry should be in multiple of 10ms ie 20 30 990 1000 No change is made if Enter is press without data entry One pulse is output each time the mass total increases by one increment as set in step 3 above 4 Masterweigh Operation KEYBOARD LAYOUT AND KEY FUNCTIONS CONT D Enter a pulse width that will match with the remote counter response time but keep the following in consideration when selecting this value The pulse output can go no faster than the value you just selected but the accumulation of the mass total may and so the remote totaliser will fall behi
44. ed in the Calibration data sheet Target Weight Press key This will return to start of menu 4 Press 8 key or key 4 times This will bring you to MENU 8 Loadcell Input Check that loadcell voltage is close to that last recorded in the calibration data sheet DYNAMIC With Weights mV and is relatively stable Press 9 key key 1 time This will bring you to MENU 9 Tacho Frequency Check that the frequency displayed is close to that last recorded in the Calibration Data Sheet and is relatively stable Press Menu key then press Abort key Masterweigh will return to the normal operating display With the weigh feeder running empty and calibration chains in place press the CAL key The display should read Start Span Calibration Press E Press The belt should complete a full number of revolutions as indicated on the Calibration Data Sheet Menu 27 No of Belt revs Watch weigh feeder to ensure no product flows over the weigher and nothing is fouling the weigh area while the calibration takes place When the calibration is complete the display will read To calculate new calibration press MASS TOTAL z xx xxx Where xx xxx is the actual number of kg the weigh feeder has weighed during the calibration The Mass Total value should be close to the target weight If it is 0 596 Press A Masterweigh will return to the normal operating display and the
45. ed once again the display will change to the following Delay before auto zeroing 60 sec Enter new delay 0 Where XXXX delay in seconds Note When the autozero is running a lower case z appears on the display when load 15 detected it will be switched off Should appear where z normally appears it means that the signal from the load cell has gone negative with respect to the normal load cell output The lower the autozero tracking level selected the more sensitive Masterweigh is to detecting a relatively negative signal the appearance of the E during normal operation signifies to the operator that the weighframe should be inspected for mechanical damage or positional change The E can also appear if the conveyor belt is damaged with pieces missing etc GETTING STARTED WTE22 Belt Scale BELT SCALE MAINTENANCE GUIDE ONGOING MAINTENANCE Many Belt Scale installations are ignored until a problem exists Like all equipment a minimum of maintenance will assist in providing long term reliability For multiple installations at the one site it may be worth contracting Web Tech to carry out the maintenance and regular calibrations These visits can also be used to provide basic training for the site personnel in the event of an emergency breakdown situation These site visits are normally scheduled at three monthly intervals The following work should be carried out on a regular wee
46. ed to boost the tachometer supply voltage when the voltage drops are evident at the tachometer due to a large separation between Masterweigh and the tachometer or due to Intrinsic Safety Barriers on the tachometer cables CPU PCB Top Board Adjusts the LCD display viewing angle so that the display can be easily read VR2 Used to span the analog output channel Use this potentiometer with a digital current meter in series with the output Use this potentiometer in conjunction with Menu 1 Sub Menu C final step to calibrate the analog output by setting the output to 20 000mA in the menu then adjusting the potentiometer until the current meter shows 20 000mA POTENTIOMETER ADJUSTMENTS 30 FIELD TERMINAL STRIPS J1 Power supply input Masterweigh Operation J5 85232 Communications Port L LI 240 Active 12 240VAC 110VAC Neutral 1 2 N 3 G 240VAC 110VAC Earth J8 Auto Zero Limit Alarm 1 COM Common contact 2 NO Normally open contact 3 NC Normally closed contact J7 System Status Relay 1 Common contract 2 NO Normally open contract 3 NC Normally closed contact Load cell and tachometer inputs pulse counter and analog outptuts P Pulse Counter Output 2 P Pulse Counter Output 3 Shd Shield 4 DG Tacho Digital Ground 5 Tin Tacho Signal In 6 TE Tacho Excitation 5V 7 Analog output ve 8 A Analog output ve 9 Analog g
47. eight for time period 15 x 17 tonnes 20 Load on cells x z Item Total y 2 1 451 x y 7 400 0 305 0 305 0 457 800 0 305 0 305 0 457 2400 0 219 0 991 1 219 1 374 2800 0 219 0 991 1 219 1 374 BENE Fig 1 2 a All dims from centre ofpivot T T Distance to centre of first idler dual idler only y Distance to load cell s centre z Distance tocentreof second idler a Distance Tocentreof Cal Wt
48. enables the entry of manual belt totalisations the resultant recalculation of the load cell span To use this calibration facility it is necessary to weigh a quantity of material with the belt scales and then to accurately determine the actual mass of that material by independent means i e via a weighbridge The two totals are then entered and the Masterweigh computes the new span factor 1 Menu entry 5 Empirical calibration span 211 7 2 Enter weigh bridge total 0 000 3 Enter belt scale total 0 000 4 New span 205 6 previous 211 7 1 At menu Entry 5 press Enter to proceed 2 Enter the exact mass total as measured by the weighbridge Press Enter when the data is correct 3 Enter the mass total as measured by the weigher Press Enter 4 Press Enter to store the new span value as the load cell span calibration factor Press Abort if no update is required Press Menu and Enter to save 12 Masterweigh Operation THIS PAGE INTENTIONALLY LEFT BLANK TO INSERT APPROPRIATE SOFTWARE TO PREVENT CREATING MANY IDENTICAL FILES IN VARIOUS LOCATIONS STANDARD SOFTWARE EMPIRICAL SPAN Jodie Mydocs manuals software mw5 mwSempir OR Non Standard Software Mass rate multi point linearisation Jodie Mydocs manuals software mw5Sliner Masterweigh Operation OP 13 MENU ENTRY 6 NULL LEVEL This entry displays the level at which the load is considered to be zero Below this level the mass rate displ
49. entina New Zealand and others We have provided systems for materials varying from iron ore to potato chips and most materials in between If you have an application in mind please contact us or visit our website www web tech com au Web Tech AutoWeigh Manufacturers amp designers of bulk solids weighing amp proportioning systems Web Tech AutoWeigh has kept at the forefront of manufacturing technology Through continual investment Web Tech AutoWeigh utilises all the very latest technology for several very good reasons It ensures our products are Accurate Reliable Easy to setup use and are the best value on the market Good value does not have to affect accuracy performance and reliability it just means we have found ways to manufacture more cost effectively In House electronic manufacture also ensures total control on quality Web Tech AutoWeigh also offer comprehensive service contracts with one of our qualified technicians BF 1 7 ep Web Tech Autoweigh Has worked with some of the largest Engineering consultancies in Asia pacific Including Ausenco who have worked with Web Tech Autoweigh for the last 10 years We are always impressed with Web Tech technology They produce quality equioment and are innovative Their responses and feedback on technical issues are valuable to the engineer and designer They produce consistent quality and accuracy with their equipment and are the major reasons for usin
50. equire to be zeroed and spanned The time required to zero and span a system is determined by the belt speed and length It is recommended that a minimum time of about 5 minutes be used Note the longer the time and hence more revolutions the better Entering Pulses per Revolution To input this time into Masterweigh mark the conveyor belt with chalk or paint a particular point on the belt If there is already a distinguishing mark on the belt use that Select a static point that can be easily used as a reference point to start and stop counting belt revolutions Set the Belt Scale running Masterweigh should now be switched on Press Menu key and then to advance to Menu Entry No 2 If the instrument is new it may show the following Menu Entry 2 Pulse per rev 1000 This is a factory entry and will change to the application values when entered To gain access to change these values to your GETTING STARTED application press the Enter key The display will now change to the following Manual entry of Pulses Rev or Press Enter to Continue This entry is used when the number of pulses per revolution is known and is not applicable to a new installation Press the Enter key to advance and the display will change to the following Manual entry of No of Revs or Press Enter to continue Once again this entry is not normally used in a new installation Press the
51. er of pulses and press E Otherwise simply press E to continue 3 Manually key in the number of revs for the above number of pulses and press E Otherwise press E to continue 4 At the moment the belt mark passes the fixed point chosen press E to start the Masterweigh counting pulses and start counting revolutions Note that the display panel will show the counting 5 After at least 5 minutes press E again to stop the count as the mark passes the fixed point 6 Key in the number of revolutions counted and press E to confirm 7 Press E to save the number of pulses rev just calibrated otherwise press A to abort and return to the original values if any MENU ENTRY 2 P 6 Masterweigh Operation MENU ENTRY 3 Load Zero Calibration This menu entry enables the operating zero to be calibrated specified number of belt revolutions are run as determined by Menu 2 with no material or calibration weights on the belt If the zero is correct then the mass total accumulated over the period will be zero The display shows the currently stored value in millivolts as read at the load cell input including any contribution made by the autozero function Note that the zero value is automatically adjusted if the excitation voltage changes 1 Menu entry 3 Zero cal 2 563mV 2 563mV ZTrck 2 Manual entry of Zero Error 0 000mV or press Enter to continue 3 Press E to continue Mass rate 0 000
52. f capacity Press A Masterweigh will return to the normal operating display and Zero calibration is complete If not press The display will now read Zero Error xx xxxmV Press E to save Otherwise press This value should be close to those recorded in step 7 Record this value amp press The Masterweigh will return to the normal operating display Steps 14 through to 19 should be repeated until the value in step 19 is lt 0 2 of capacity If the zero calibration is changed the new value should be recorded and the Calibration Data sheet updated E tee FE 14 15 16 17 18 19 20 21 22 23 24 Span Calibration with Masterweigh 5 Acquire correct Calibration Data Sheet and Design Data Sheet for weigh feeder Allow weigh feeder to run for at least 20 minutes prior to calibration Remove feed from weigh feeder Perform Zero calibration before span calibration is attempted Ensure correct number and weight of calibration chain is used Design Data Sheet With the weigh feeder running empty apply calibration chains Press MENU key Press 4 key or key 3 times This will bring you to menu 4 Fixed Weight Calibrate Span Check that the Span value is the same as that last recorded in the calibration data sheet Press key 3 times The display will read Target weight XX XXXt Check that this value is the same as that last record
53. frequency is 10Hz and the maximum 1000Hz The reading should be fairly stable if the conveyor is not surging or slipping Wild fluctuations generally indicate a mechanical problem with the installation or conveyor drive Field Wiring Refer to Dwg WTMWS 01 1 WTMWS 01 7 All field wiring should be run away from any influence of high voltage and current cables Note If the field wiring is run in conduit make sure that the conduit termination is sealed so water cannot enter the Masterweigh enclosure from the conduit Load Cell Electrical Connections Refer to Dwgs WIMW5 01 1 WTMW5 01 7 Locate the junction box on the conveyor stringers preferably on the easy access side Bring all conduits in from the bottom of the junction box so that water ingression is limited Connect the load cell to the terminal block as shown Connect load cell Masterweigh interconnect cable to J5 as per drawing ELECTRICAL INSTALLATION Note Water dirt coal dust etc will degrade the system performance Make sure that the Junction box is always properly sealed Commercially available sealants that use acetic acids as an accelerator can cause acidic fumes which condense of the PCB and cause electrical leakage Use Neutral Cure Based Sealants Power Connections Masterweigh can be supplied with 240 or 110V 50 or 60Hz or optionally 24 48VDC Check that the slide switch on the power PCB is set to the appropriate supp
54. g Web Tech AutoWeigh The ability to produce on time and be competitive was also a major factor in our choice of supplier They meet our vendor data requirements and quality control Overall they offer good Web Tech AutoWeigh also represents the design features and produce quality equipment following companies in Australia EE Peter Murphy Area Lead Engineer Ausenco Brisbane RICE LAKE WEIGHING SYSTEMS Please contact us if you require more information or if you large range of load cells digital weight indicators would like a quotation please fill out a product specific and batching systems www ricelake com application data form from the website and send it with your enquiry Bolt on sensors for bin weighing and level systems www kistlermorse com Products Inc Telescoper conveyor take ups including screw and spring loaded types www bryantpro com Wr Web Tech AutoWeigh Head Office 11 Electronics St Eight Mile Plains QLD P O Box 4006 Eight Mile Plains QLD 4113 Ph 61 7 3841 2844 Fax 61 7 3841 0005 email info web tech com au Sydney Office Ph 1800 777 906 www web tech com au BELT WIDTH 75 1 r L 357 p d K E EO p
55. ged 3 Enter the period required in belt revolutions over which autozeroing occurs Note that the number of belt revolutions should be chosen such that the total zeroing period is of the order of 5 minutes or more This will ensure that accurate zero levels are produced Note that the actual zero level used by the Masterweigh will not be updated until a zeroing period has been completed If a new value is entered and the Enter key is pressed then that value is saved otherwise no update occurs 4 This step enables the qualifying delay time to be set Choose a time that will ensure that all material is off the belt The delay time commences when the mass rate falls below the minimum level set above 5 Step five allows the user to enter the value in mV below which it may be considered that an invalid Autozero is taking place 6 Step six allows the user to enter the value in mV above which it may be considered that an invalid Autozero is taking place 7 Increase this factor if the letter E is being encountered in the main display 8 The function of displaying the letter E can be switched on or off here by pressing the C button MENU ENTRY 7 Auto Zero Tracking 16 Masterweigh Operation MENU ENTRY 8 Loadcell Input Millivolts This entry displays the load cell input in millivolts The displayed value is unaffected by the load zero load calibration and zero tracking functions The entry also display
56. h will quote for the supply of new rolls with grub screws fitted to the shafts if this method is preferred Note The maximum vertical misalignment should be no more than 0 8mm 13 When the vertical alignment pitch and squareness of the idler is correct the transportation block can be removed and the working load cell installed To assist in removing the transportation block remove the calibration bars from the load arms if used Now lift the load arms by screwing the tare screw until the striker bar is just free of the transportation block Make sure that the lock nuts are loose before attempting to lift the striker bar Carefully bolt down the load cell using the four bolts and washers supplied Tighten the bolts alternatively to approximately 45Nm Now lower the striker bar into contact with the load cell by loosening anti clockwise the tare bolt until it is free of load 14 The cable from the load cell should be run in the steel conduit which is built into the weighframe A flexible conduit should be used to carry the load cell cable to the load cell junction box The junction box should be mounted on the outside of the conveyor stringer If the optional Web Tech load cell junction box is not used then a waterproof box should be used and all load cell wires terminated in a suitable connector strip Note Water ingress into the load cell junction box will cause inaccuracies and non linearity in the displayed
57. his can be a number in the range 1 to 32766 Note that entering a Configuration access code of 0 zero clears the Configuration access code Pressing Enter returns to step 1 above MENU ENTRY 15 Access Code Menu 22 Masterweigh Operation MENU ENTRY 16 Report Printing Menu Optional This menu controls the automatic report printing function of the Masterweigh 5 This menu is only accessible if the real time clock module has been installed It is possible to configure the Masterweigh 5 to automatically produce a report the RS232 serial port on either a time or mass total basis It is also possible to manually command a report at any time The format of the report is Masterweigh Report Date 29 06 00 Time 12 01 41 Mass total 2474450 tonnes Massrate 5380 tonnes hour Menu step 1 displays the following 1 Menu entry 16 Automatic report printing Off Pressing Enter advances to 2 Press Clear to print report NOW Press E to continue Pressing Clear will cause a report to be immediately printed via the RS232 serial port Pressing Enter advances to 3 Report Mode Off Press Clear to change Enter to accept Pressing Clear toggles the report mode between off time based or total based Pressing Enter when report mode is Off returns to Step 1 above Pressing Enter when report mode is Time based advances to 4 hour O hours Report every Enter new value
58. ich the idler will eventually be welded are manufactured with slotted mounting holes Check and set the measurement between the centre of the torque tube pivot Point and the centre of the first idler on the weighframe at 2 9mm If the desired pitch cannot be obtained move the two idlers 1 and 12 to assist 3 Locate the weighframe assembly Carefully remove it from its wooden crate Do not lift it out by the load arms the load arms will be marked with warning signs to this effect Place the frame into a position where the weighing idler assembly can be easily welded onto the support bracket sometimes loading the frame into the conveyor stringers is the most convenient 4 Drawing WTE22 shows the load cell positioned within the body of the weighframe carried on a stainless steel plate This plate positions the load cell so that it contacts the weighframe s striker bar The weighframe is supplied with a transportation support block in place of the load cell The block is of the same dimensions as the load cell and must be left in place whilst the installation procedure is taking place Load Cells can be easily damaged by shock loading overload or welding in the vicinity of the cell reserve the right to cancel any warranty on the load cell if it is damaged for any of the above reasons 5 The zinc plated brackets are affixed to the torque arms by two bolts These bolts fit through two elongated holes i
59. increase the tolerance at which Masterweigh flags in the display that a negative loadcell excursions has taken place which is greater than the level set in the Auto Zero 2 The error is only flagged in the local display in form of an at the right hand side of the display where the Z is normally shown MENU ENTRY 7 Auto Zero Tracking Step 7 allows the user to increase the tolerance before displaying the E At step 8 the user can toggle the above function on or off depending on preferences Note Under normal running conditions negative loadcell excursions should not be occurring Check the weigh area for abnormalities Menu Entry 7 Zero Track if greater than 20 0 for 5 revs Auto Zero Level 20 0000 tonnes hour Enter New Level 2 0 00000 3 Auto zeroing period 5 revs Enter new period 0 4 Delay before auto zeroing 60secs Enter new Delay 0 Auto Zero Low Limit 0 000mV Enter new level Auto Zero high Limit 0 000mV Enter new level 0 000mV Auto Zero Error Level 2 times Auto Zero Enter new value 0 Autozero Error Display is On Press Clear to Change Enter to accept Masterweigh Operation OP 15 MENU ENTRY 7 Auto Zero Tracking Cont d 1 At Menu Entry 7 press Enter to proceed 2 Enter the new autozero level in mass rate units and press the Enter key If the Enter key is pressed with no data entry then the stored value remains unchan
60. ing Calibration There are three ways of calibrating spanning Masterweigh 1 By passing material over the belt weighing that material and then entering that value into Masterweigh via Menu 5 2 Using a weigh chain 3 Using supplied calibration bars This part of the manual will deal only with method 3 Refer to the calibration data sheet supplied with your system and the sample sheet at the rear of this manual The calibration bars supplied have been manufactured to weigh approximately 70 of the load that the weighframe will carry when the maximum flow rate as detailed in the client s data sheet is achieved With the belt stopped load all the calibration bars supplied onto the weighframe They should be placed centrally across the weigh arms and pushed hard up against the two stops Now set the weighfeeder running and advance Masterweigh to Menu 4 and enter that Menu by pressing the Enter key The display will change to the following Manual entry of span factor 0 000 Or press Enter to continue WTE22 Belt Scale GETTING STARTED CONTD Normally with a new installation data would not be available at this stage as Masterweigh calculates this parameter however this entry is useful if span adjusting is required at a later date Press the Enter key and the display will change to the following 60 000 tonnes 0 000 tonnes Current weight Enter target weight Dealing with
61. kly basis Clean down of build up on weighframe and removal of spillage Inspection and cleaning of idler rolls Zero calibrations Inspect belt tracking Inspect belt wear 9 NOTE The Zero calibrations can AutoZero initiated which only requires belt to be run empty for the calibration period The following work can be carried out less frequently 3 monthly Span calibrations Check cabling and junction boxes The following work should be carried out on a 12 monthly basis Lift belt and check all idler rolls for wear build up and bearing problems Carry out mechanical alignment check with stringlines Adjust balance on loadcells where applicable Apart from the general housekeeping of the installation the other important aspect that should be addressed is the record keeping for each installation Most modern Belt Scale electronics store all data in battery backed or non volatile memory however in the case of catastrophic failure this data will probably be lost or not accessible At these times it is essential that accurate records be available for reprogramming purposes Accurate records also allow review of the Belt Scale performance and possible problems that may require attention Web Tech has provided proper data record sheets that can be used in conjunction with the maintenance program BELT SCALE MAINTENANCE GUIDE wr Tech AutoWeigh OPERATION MANUAL Masterweigh 5 Integrat
62. ll by switching in a reference signal across one arm of the loadcell bridge MENU ENTRY 4 Fixed Weight Calibration 10 Masterweigh Operation MENU ENTRY 4 Fixed Weight Calibration cont d This method provides a reasonable method of quickly checking a weightometer but is no substitution for the aforementioned calibration methods The software required to implement this function is supplied in all Masterweigh 5 units but the hardware required for the use is an optional extra and therefore only supplied to order Assuming that your system is rigged for R Cal proceed as follows Initially calibration Menu 4 should be accessed and the enter key pushed until the sub menu Span Cal Mode is reached Menu 4 Span Cal Mode R Cal Press Clear to change Enter to accept Toggle the clear key until R Cal has been selected Now proceed as for normal calibration which is performed as described under Menu Entry No 4 When Masterweigh 5 completes the test note the number but not accept it by pressing enter Press the Abort key The total achieved should be logged and future R Cal tests reference to it If the value recorded in subsequent tests exceeds 0 5 of the original value perform a full calibration using weights etc Note Zero system prior to R Cal test MENU ENTRY 4 Fixed Weight Calibration Masterweigh Operation OP 11 MENU ENTRY 5 Empirical Span Calibration This menu entry
63. ly voltage if supplied with AC supply Masterweigh is protected against most industrial electrical noise If problems are encountered an external mains power filter should be used Power Connections Terminal Strip J1 Refer to Dwg WTMWS 01 1 WTMWS 01 7 Masterweigh 5 can be supplied 240VAC or 110VAC 50 or 60Hz Check that the slide switch below the transformer is set to the required supply voltage Terminal L LI Active Terminal N L2 Neutral Terminal G Earth Ground Masterweigh is protected against most industrial electrical noise however problems with the mains supply encountered an external mains power filter should be used 21 Belt Scale ELECTRICAL INSTALLATION CONTD Auto Zero Limit Alarm Terminal Strip J8 Masterweigh 5 is fitted with an Auto Zero Limit Alarm feature which can be used to alert operators that the Auto Zero Tracking has exceeded predetermined limits Terminal Com Relay Common Contact Terminal NO Relay Normally Open Contact Terminal NC Relay Normally Closed Contact System Status Alarm Terminal Strip J7 Masterweigh 5 is fitted with a System Status alarm which can be used to alert operators when an electronic problem has been detected or if the power to the electronics has been turned off The terminal designation is shown for the de energised condition In fault free circumstances the relay is energised Terminal Com Relay Common
64. me one aspect of the problem but if the profile troughing angle is found to be causing stringline contact then those idlers must be changed to comply with the weigh idler profiles Note Make sure all weigh roll grub screws have been backed off so the roll shaft is in contact with the idler support brackets WTE22 Belt Scale MECHANICAL INSTALLATION CONTD 12 Using packers and shims of various thickness elevate the non weigh idlers so that the rolls just contact the stringline If the rolls make too positive a contact with the stringlines it is likely that the lines will be deflected thus causing all further idlers to be misaligned The weigh idler rolls will have been fitted with grub screws and lock nuts These grub screws are to be used to lift the rolls into contact with the stringlines It should also be noted that a certain amount of profile adjustment can be made if careful use is made of the grub screws It is necessary to securely bolt down all the weighing idlers using the grub screws as the idler assembly will tend to be pulled away from the stringlines when tightening the securing bolts Remember to tighten up the grub screw lock nut after the final adjustment has been made If the profile of the non weighing quality idlers needs to be altered then either weld support plates to the idlers shaft carrying slot if the particular rolls need lifting or grind out the slot if the rolls need to be lowered Web Tec
65. n the brackets Make sure that the brackets either side of the frame are either fully forward or fully back prior to proceeding to the next step MECHANICAL INSTALLATION WTE22 Belt Scale MECHANICAL INSTALLATION CONTD 6 Lift the idler assembly onto the zinc support brackets and centralise the assembly so that the zinc angle iron support straddles the weighframe evenly The rolls can be removed if the assembly is heavy and unmanageable 7 Weld the angle iron of the idler brackets to the zinc brackets It is advisable to run the welds along the front and rear of the angle iron on the brackets It is also advisable to protect the welds with cold galvanised paint etc 8 Fit the weighframe into the conveyor making sure that it is not lifted by the torque arms Place the weighframe halfway between the first of the original downstream and upstream idlers Note that the weighframe is usually orientated so that the two vertical arms which retain the calibration bars are in the upstream position However if the conveyor is inclined the weighframe can be fitted with the calibration bar stops downstream Now load the two upstream and downstream weigh idlers followed by the remaining two upstream and downstream idler assemblies 9 Carefully space out the idlers and weighframe dividing the entire alignment area into eleven Note The idlers that have been mounted on the weighframe can also be adjusted by means of the slo
66. n the load cell input cables as well as the tachometer cables Masterweigh has been protected as far as possible however severe noise or spikes can get through Once any part of memory has been corrupted Masterweigh will detect it and automatically flag an error If the corruption has only changed data an error may not be detected and some erroneous results may occur The only way to clear the memory of this data is by re initialising Switching off and on will not clear the memory The act of re initialising causes all the calibration data to be lost and replaced by factory data The calibration data specific to your application can easily be re entered if you have kept a note of what was in the menus Menu 1 however does have specific data that is logged on the main PCB under Calibration zero and Precision ref LOG ALL CALIBRATION DATA AS YOU MAY NEED TO MANUALLY RE ENTER IT AT A LATER DATE TO RE INITIALISE MASTERWEIGH 5 PROCEED AS FOLLOWS 1 Switch off Masterweigh 2 Simultaneously press the Blank and Abort keys 3 With both the above keys pressed switch Masterweigh on 4 The display will now show the message Press C to Configure Any other key to continue 5 Now press the C key and Masterweigh will return to normal running mode 6 Masterweigh is now configured to factory defaults 7 Press Menu to enter menu entry 1 then press C to enter the calibration data section The display will warn you
67. nd the actual mass total E g if the pulse width is set to 100mS then at it s fastest rate the output will on for 100ms then off for 100ms This will give a maximum output of 5 complete pulses per second 100mS on and 100mS off 200mS per total pulse Therefore if the feeder is running faster than 5 increments per second 18000 increments per hour then the remote total will be wrong E g for an increment value of 0 0ltonnes the limit will be 180tph To modify factory calibration data 5 At Menu Entry 1 press the C key to gain access to the factory calibration data The correct values for these calibration constants have been engraved onto the main board of the Master Weigh 5 stack the top board Check that the values in the computer are the same as the engraved values and modify the values in the computer as required 6 The display will warn the operator not to modify data and to press A to exit and continue Press the E key at this point for access to the Zero Reference 7 Enter new data and or press the E key to proceed 8 Now access to the precision reference has been gained Enter new data and or press the B key again MENU ENTRY 1 Parameter Set Up 9 Either exit at this step by pressing the A key or press E to access the menu which exercises the 4 20mA circuit 10 Press C to step through the Rate O P s to the desired value namely 20 0 10 04 5 02 7 53 6 27 5 645 5
68. oad Dynamic with weights Tacho Frequency Tacho Frequency Hz Q Hz on VF Drive if appl Filter Constants Display Time Constant Rate O P Time Constant Tacho I P Time Constant Displayed Units tonnes hr kg hr kg min tons hr Ibs hr 0 1 2 Belt Speed Indicated Belt Speed m sec Hz on Drive if appl Indication Current Belt Length metres 5 1 Access Codes Operator Code Configuration Code 1 1 1 DESIGN DATA SERIES Conveyor Date CAL BARS 1 Max Nominated Conveyor Capacity t hr No Wt kg 2 Max Capacity in kg s 1 x 1900090 kg min 1 3 Measured Belt Speed m min 2 4 Max Load on Belt 2 3 kg m 3 5 Weigh Span metres 4 6 Loading across Weigh Span 4 x 5 kg 5 6 7 Effective Load Load cell See Fig 1 7 8 Length of Weigh Moment 0 305 yin table below 8 c c Torque tube Load cell 9 9 Force Load cell s Full Scale 7 x 8 kg 10 10 Calibration Bars Total kg 11 11 Length of Moment 0 457 a in table below 12 c c Torque Tube and Weights 13 12 Force on Load cell s with Cal Bars 10 x 11 kg 14 13 Cal Bars as a of Max Capacity 12 9 x 100 15 14 Mass Rate with Cal Bars 1 x 13 100 t hr 16 15 Tonnes per min with Cal Bars 14 60 t min 17 16 Time per Belt Revs secs 18 17 Time expressed in minutes 16 60 min 19 18 Target W
69. of the excitation output will interfere with normal operation of analog input circuitry and the RS232 interface Caution Application of an external voltage source to the excitation terminals may cause serious damage to the Masterweigh No calibration adjustment of Masterweigh analog inputs is required Gain and zero are automatically adjusted by the reference This automatic calibration 15 repeated once every 30 seconds whenever the Masterweigh is energised After energising the Masterweigh always allow a minimum of thirty 30 seconds for this automatic calibration to be performed before initiating a span or zero calibration sequence Note If Masterweigh has not been energised for some time allow 3 minutes before initiating the above FACILITIES AVAILABLE 26 Masterweigh Operation FACILITIES AVAILABLE CONT D Tacho Input and Supply a Electrical Characteristics The tacho input is designed to accept a voltage input of 2 5 to 50 volts peak and so will accept either a TTL or sinusoidal voltage input The input threshold voltage is 1 2 volts at the positive input with respect to the negative input The negative input is directly connected to the Masterweigh grounds Avoid earthing this input in the field as it will create ground loops The tacho input will not accept frequencies in excess of 800 Hz approx A regulated 5 volt supply is provided for energising a digital pulse generator This
70. onveyor Press MENU key Press 3 or key 2 times to get to menu 3 Zero Calibration There will be 2 values displayed 1 is Zero Cal xx xxxmV the 2 value is xx xxxmV Ztrck Record BOTH values for future reference Press 8 key key 5 times This will bring you to MENU 8 Loadcell Input Check that loadcell voltage is close to that last recorded in the calibration data sheet DYNAMIC No Load mV and is relatively stable Press 9 key or key 1 time This will bring you to MENU 9 Frequency Check that the frequency displayed is close to that last recorded in the Calibration Data Sheet and is relatively stable Press Menu key then press Abort key Masterweigh should return to the normal operating display With the belt running empty press the ZERO key The display should read Start Zero Cal Press Press The belt should complete a full number of revolutions as indicated on Calibration Data Sheet Menu 2 No of Belt revs Watch conveyor to ensure no product flows over the weigher and nothing is fouling the weigh frame while the calibration takes place When the calibration is complete the display will read To calculate new calibration press MASS TOTAL xx xxx Where xx xxx is the actual number of tonnes the belt scale has weighed during the calibration If the Mass Total value is lt 0 2 o
71. or Web Tech Australia Pty Ltd Head Office 11 Electronics Street EIGHT MILE PLAINS QLD 4113 PO Box 4006 Email info web tech com au EIGHT MILE PLAINS 2 4119 www web tech com au Phone 07 3841 2844 AUSTRALIA Fax 07 3841 0005 MAN MW5 06 11 TABLE OF CONTENTS Masterweigh Operation Keyboard Layout and Key Functions Menu Entry 1 Parameter Setup Menu Entry 2 Pulses Per Revolution Calibration Menu Entry 3 Load Zero Calibration Menu Entry 4 Fixed Weight Calibration Menu Entry 5 Empirical Span Calibration Menu Entry 6 Null Level Menu Entry 7 Auto Zero Tracking Menu Entry 8 Load Cell Input Millivolts Menu Entry 9 Tacho Frequency Menu Entry 10 Modification of Filter constants TN Menu Entry 11 Modification of Displayed Units Menu Menu Entry 12 Belt Speed Indication Menu Entry 13 Clearing Mass Total Menu Entry 14 Real Time Clock Menu Menu Entry 15 Access Code Menu Menu Entry 16 Report Printing menu Optionl Resetting Masterweigh 5 m m Facilities Available Introduction Loadcell Input and Bxcitation Tacho Input amp Supply a Tacho Electrical Characteristics b Tacho Frequency Selection Pulse Output Analog Outputs Earthing A Display User Configuration LK1 Grounding LK2 Excitation Selection LK3 On Board Half Bridge LK4 LK5 Current Loop Supply LK6 LK7 LK8 LK9 Control Pulse Output Type CPU PCB Top Board Po
72. pe If you are unable to place the tachometer in the tail pulley consult Web Tech As there are many different conveyor designs and hence tail pulley fixings we do not supply a fixing bracket for the tachometer See Dwg WT5013 for a suggested method Whilst the spring coupling will accommodate small misalignments without any problems large misalignments will cause premature failure of the coupling When connecting the spring coupling it is advisable to smear anti freeze grease onto the tail pulley s snub shaft and the two grub screws located at both ends of the spring couplings c Electrical Connections Refer to Electrical connection drawings in the Drawing section NOTE The Tachometer must move with the tail pulley if screw take up is used Connect the tacho up as shown using Beldon 8771 or equivalent It is important to seal the junction box against water and to run the cable away from high voltage power cables ELECTRICAL INSTALLATION WTE22 Belt Scale ELECTRICAL INSTALLATION CONTD Loosen the four screws on the junction box cover plate noting that they have retaining washers fro the screws and gasket The enclosed PCB can be removed by squeezing the nylon locks on the PCB stand offs in turn and pulling the board forward When Masterweigh has been connected and ready for commissioning it is advisable to observe the frequency of the tacho pulses arriving at Masterweigh displayed in Menu 9 The minimum
73. r Enter new capacity 0 000 3 Mass total increment 1 000 tonnes Enter new inc 10 0 001 0 000 4 Remote totaliser pulse width 100ms Enter new value 20 1000 0 Menu 1 can also be used to access and modify the precision zero reference and reference voltage by pressing the C key It is advisable however not to adjust this data unless the unit has been reconfigured 5 Menu Entry 1 Parameter setup 6 WARNING Calibration data Do not modify Press A to continue 7 Calibration zero x xxx milli volts Enter new zero ref 0 000 8 Precision ref x xxx millivolts Enter new precision ref 0 000 9 Press E for Rate O P span calibration else press A MENU ENTRY 1 Parameter Set Up 10 Rate O P x xxmA C for next E to reset unit 1 At Menu Entry 1 press Enter to examine or modify the maximum capacity of the weigher the precision of the remote counter pulse or the remote counter pulse width 2 At this step the current feeder capacity is displayed A new value may be keyed in then press Enter to continue Otherwise press Enter with no data entry to retain existing values and continue This value sets the 10046 point for the 4 20mA mass rate output signal Note that the system can measure mass rates above this value assuming the instruments remain within their normal operating range and higher values will b
74. ried out in this menu entry and the auto zero tracking function It is thus possible by entering the menu to this level and then aborting to reinitialise the working copy of the load zero and remove any auto zero tracking contribution Masterweigh Operation OP 7 MENU ENTRY 3 Load Zero Calibration Cont d 6 This display will come up automatically when the belt has completed the required number of revolutions The measuring phase of the test has finished and the resulting mass total is displayed This mass total should be approximately zero however if non zero then a new loadcell zero may be required Press the Enter key to display the millivolt offset resulting from this test 7 The new loadcell zero or offset is displayed in millivolts Press the Enter key to save this value as the new loadcell zero or press Abort to exit without saving MENU ENTRY 3 8 Masterweigh Operation MENU ENTRY 4 Fixed Weight Calibration This menu entry allows the automatic calibration of the load cell span The test is run over a preset number of belt revolutions as in Menu 2 during which calibration weights or weigh chains are placed on the or weighframe A mass total is accumulated in the course of the test This total is then compared with an expected or target weight and the span adjusted accordingly The display shows the currently stored load cell span value To calculate new calibration Press E Mass
75. round 10 L Loadcell output ve 11 L Loadcell output ve 12 Loadcell excitation ve 13 Loadcell excitation ve 14 Shd Loadcell Shield FIELD TERMINAL STRIPS 1 GND 2 TXD 3 RXD 1 TX 2 TX 3 COM 4 RX 5 RX Ground Transmit Receive J6 RS485 Communications Port Transmit Transmit Ground Receive Receive DATA SHEET Customer Conveyor Designation Model Date Load Cell Cap Type Data by Mark Wilde Tare Serial No Material Contract No Order No Software version No Board S N Tacho Ppr Type Multiplier Menu MASTERWEIGH 5 DATA 1 Parameter Setup Pulse Width ms Capacity Inc Zero ref mV Precision ref mV Pulses Per Belt Rev No of Belt Revs Zero Calibration mV Z Track mV Fixed Weight Calibration Calibration Weights Span Target Weight From Chains or Live Load Test 5 Empirical Span 6 Null Level This value should be no more than 1 to 296 of design capacity Autozero Tracking Zero Track if For Revs Delay Time secs 8 Load Cell Output Static No Load mV Static with Weights mV Dynamic No Load mV Dynamic with Weights mV 9 Tacho Frequency Hz Motor frequency Hz 10 Filter Factors Display secs Rate O P secs Tacho secs Fast Track Band 11 Displayed Units Kgs Hr Belt Serial Number 12 Belt Speed m Motor freq Hz Belt Length m s Rese
76. s pressed instead of E Enter then the new calibration information is lost and Masterweigh uses previous data The same loss occurs if power is lost during calibration GETTING STARTED WTE22 Belt Scale GETTING STARTED CONTD Fine Tuning Now that the system is running it can be fine tuned a Null Level Most conveyor belts have sections which are much heavier or lighter than the average weight of the belt To stop Masterweigh adding small amounts of weight to its total during those periods when the belt is running empty Masterweigh has a menu entry which is called Null The joint in the belt is a major cause of small amounts of weight being added to the totaliser and the effects of the joint can be seen by entering Menu 6 The display will change to the following Enter a new null level 0 000 Mass rate 0 165 tonnes hour By running the belt empty in this menu the raw empty belt mass rate can be observed As the joint or any other belt abnormality passes the weighing element observe the highest mass rate value achieved over one belt revolution and enter a null value just higher than the mass rate noted b Autozero Tracking Material sometimes builds up on the conveyor belt and the weigh area even though belt scrapers are used and Masterweigh s weigh area is narrow Masterweigh can automatically compensate for these build ups if Menu 7 is activated Advance Masterweigh to Menu 7 At the point
77. s the excitation voltage as currently sensed by the Masterweigh It is displayed to the nearest volt only ie 10 is in the range 9 501 to 10 5V It is updated once every 3 minutes This display enables a user to confirm that the Masterweigh is correctly sensing excitation voltage and thus that all links etc are correctly installed Incorrect excitation sensing will result in inaccurate and unstable mass rate measurements Access is also available to the output of the voltage to frequency converters 1 Menu Entry 8 Loadcell 16mV Extin 10V 2 V to F count xxxxx Press Enter to continue This facility is for technician s use only 1 Menu Entry 8 displays the load cell millivolt output and excitation voltage 2 Press E to access the current V to F output 3 Press again to return to Menu Entry 8 MENU ENTRY 9 Tacho Frequency This entry displays the current tacho frequency in hertz the input range is 5Hz to 1000Hz and switches between software or hardware inputs 1 Menu Entry 9 Tacho Frequency 50 005 Hertz 2 Tacho Source Hardware Press Clear to change Enter to accept 3 Tacho Source Software Press Clear to change Enter to accept 4 Tacho Source Ext Con Press Clear to change Enter to accept MENU ENTRY 8 amp 9 1 Press E to enter the menu to select the source of the tachometer signal 2 Press to change or toggle between the available pul
78. se sources which are e Hardware input signal to the system as generated by the speed sensor magnetic pick up or optical tachometer e Simulated an internally generated 100Hz signal that is always on Ext Con an internally generated signal that is only on when an external contact is closed between terminals DG and In on terminal strip J3 3 Press E to accept and return to the Menu Entry 9 Masterweigh Operation OP 17 MENU ENTRY 10 Modification of Filter Constants Filtering can be applied to the following functions Displayed mass rate 4 20mA mass rate output Tacho input The level of filtering is specified by a constant that may be in the range 1 second to 120 seconds Time constants greater than 120 seconds have the same effect as a 120 second constant A time constant of 1 second is equivalent to no filtering Time constants greater than 1 second introduce a delay in the rate of change of the filtered function 1 Menu Entry 10 To modify Filter factors press Enter 2 Display Time constant is 2 secs Enter new Time constant 0 3 Rate O P Time constantis 4secs Enter new Time constant 4 Tacho I P Time constant is 1 secs Enter new time constant Press Enter to modify the display filter time constant 2 The display mass rate filter time constant is shown When a time constant of greater than 1 is selected main mass rate display is damped A new
79. seconds for update of display after adjusting the excitation Incorrect configuration of excitation sensing will cause erratic mass rate readings The millivolt input accepts either a differential millivolt signal or a half bridge input and will operate accurately over a common mode range of minus 8 to plus 8 volts The input is overload protected to plus or minus 35 volts on either terminal with the Masterweigh energised and plus or minus 20 volts on either terminal when not energised Transient overload capacity is much higher than this continuous rating and depends the duration of the overload Masterweigh Operation OP 25 FACILITIES AVAILABLE CONT D Load cell Input and Excitation Contd The analog digital conversion is performed using voltage to frequency conversion techniques thereby providing excellent rejection of signal noise over wide frequency range With the exception of short periods allocated to self calibration the Masterweigh is continuously monitoring the load cell input rather than periodically sampling as is the case for systems which use dual slope integrating converters This results in a more accurate measurement of the rapidly fluctuating input signal from the load cell Careful design of the input circuitry ensures excellent rejection of common mode signals both AC and DC Note The excitation voltage regulators are overload and short circuit protected however short circuiting
80. t goes to approximately 0 06mV Screwing the screw out will cause the millivolt reading to increase The maximum value is dependent on the capacity of the load cell and the weight of the idlers Once the digital voltmeter reads approximately 2 5mV lock the screw by tightening up the lock nut making sure that the action of tightening the lock nut does not cause the tare screw to move and hence change the tare output from the load cell If a digital multimeter is not available then Masterweigh can be used to display the load cell output With Masterweigh on and in the normal running mode press the Menu key and advance the display by pushing the key until Menu 8 appears Menu 8 display the load cell output in millivolts When the tare voltage has been set up return Masterweigh to the run mode by pressing the Menu key followed by the Enter key Finally seal up the junction box and make sure that the water can t enter via conduit connections etc Remember Water entering the junction box will adversely affect the performance of Masterweigh MECHANICAL TARE WTE22 Belt Scale GETTING STARTED NOTE The following procedures will normally have been carried out at the factory This section includes a minimum of basic information to get you started Detailed procedures are to be found in Masterweigh Operation The set up sequence is Enter pulses revolution Zero Span Fine tuning Most Belt Scales r
81. t length in step 3 and not a belt speed in step 4 this value will be meaningless Press E to continue Masterweigh Operation OP 19 MENU ENTRY 13 Clearing Mass Total Ment entry 13 Press C to clear Mass Total 1 When the mass total on the mass rate mass total display MRMT is to be zeroed press C at Menu Entry 13 All totalised figures are then cancelled by the integrator Press Menu then Enter to return to the MRMT display MENU ENTRY 13 Clearing Mass Total 20 Masterweigh Operation MENU ENTRY 14 Real Time Clock Menu This menu controls the operation of the Masterweigh 5 real time clock The real time clock is a separate module with its own battery power source that will continue to keep accurate time even in the case of power loss to the Masterweigh 5 unit This menu is only accessible if the real time clock module has been installed Step 1 displays following current time date and day of week information 1 Menu entry 14 Wed Time 09 12 43am Date Pressing Enter advances to 2 Elapsed Time Press clear to reset 0 days 00 19 58 hours Here a free running elapsed time count is displayed Pressing Clear will reset the elapsed time counter Pressing Enter advances to Clock is currently in 12 hour mode Press to change Enter to accept Masterweigh 5 real time clock can be configured to display the current time in either 12 or 24 hour mode the selection
82. tentiometer Adjustments RV1 Excitation Level Adj ustment RV2 Low Voltage Adjustment Field Terminal Strip J1 J6 Masterweigh 5 OP 1 TABLE OF CONTENTS MAN MWS June 11 Masterweigh 5 TABLE OF CONTENTS Drawings MWS5 DIS WTMWS5 01 JB010011 JB010015 JB010014 JB010020 SMLCJBO2 SMLCJB04 WT5013 Data Sheets MW5 Calibration Data Sheet TABLE OF CONTENTS MAN MWS June 11 Masterweigh Operation Mw5 Rev F OP 1 KEYBOARD LAYOUT AND KEY FUNCTIONS CONT D MASTERWEIGH 5 KEYBOARD LAYOUT TOTAL RESET ZERO CAL III rns EDD ABORT Masterweigh 5 operate protected security or open mode depending how the user has configured it See Security for set up details The following text assumes that the operator has gained access to the system SECURITY CODES If a user has entered security codes into the Masterweigh 5 entry to the menus will be restricted Two four digit codes will have been entered see Menu 15 for details One code low level allows for the code holder limited access to any data in the menus for inspection only The other code high level is needed for access to menus and to make modifications to constant start calibration sequences etc Note that no access is given if no code is entered If security codes have been activated on pressing the Menu key the computer waits for the four digit code If no attempt is made to enter a co
83. ts Cleared to 1 Configures Cleared to 1 10 0 0 99 raid C1 Electronics sheets MWS Data Sheet MW5 Data sheet doc WEB TECH WEIGHFEEDER DESIGN DATA SHEET CLIENT DESIGNATION MODEL CALIBRATION METHOD NIA t A W N CALIBRATION BAR S CALIBRATION BAR QTY AND TOTAL WEIGHT ke IDLER PITCH TOTAL WEIGH AREA metres EQUIVALENT LOADING m WITH CAL BAR S 1 Item 3 kg m BELT SPEED m s SIMULATED MASS RATE Item 4 x Item 5 x 60 kg min BELT LENGTH metres No OF BELT REVOLUTIONS FOR TEST TARGET WEIGHT Item 4 x Item 7 x Item 8 10 TARGET WEIGHT after material tests CALIBRATION CHAIN N WEIGHT OF CALIBRATION CHAIN PER STRAND kg m No OF STRANDS TOTAL WEIGHT OF CALIBRATION CHAIN Item 1 x Item 2 kg m BELT LENGTH m 5 No OF BELT REVOLUTIONS FOR TEST 6 TARGET WEIGHT Item Item 4 Item 5 7 TARGET WEIGHT after material tests 1 SETTINGS SHEARGATE OPENING CENTRE mm MIN FREQUENCY ON DRIVE Hz 2 2 MAX FREQUENCY ON DRIVE Hz 10 0 0 99 raid C1 Electronics Data sheets MWS Data Sheet MW5 Data sheet doc PO NDS 11 12 13 14 15 16 17 18 19 Zero Calibration with Masterweigh 5 Acquire correct Calibration Data Sheet and Design Data Sheet for belt scale Allow conveyor to run for at least hr prior to calibration Remove feed from c
84. tted zinc angle brackets The measurement from the torque tube to the first idler must be 305mm When it has been confirmed that all idlers are of equal pitch diagonally square and square with respect to the stringers and belt mark out the fixing hole positions and drill them MECHANICAL INSTALLATION Remove all swarf from the drilled holes before proceeding 10 Loosely bolt down all idlers and weighframe making sure that the load cell contacts the transportation block Two calibration bars loaded onto the load arms will ensure that the striker bar stays in contact with the transportation block during the following steps If the calibration bars do not force the striker bar on to the load cell button loosen the tare screw 11 Using either piano wire or nylon fishing line 50kg breaking strain or greater run seven stringlines along the alignment zone These seven lines should be tied off on the two previously elevated idlers Two lines should be allocated to each of the wing rolls with three being allocated to the bed roll The lines must be very taut after tying off and there should be no measurable sagging No rolls wing or bed must contact any of the strings at this time If any rolls are contacting a stringline then the two idlers used to tie off the stringlines have not been elevated high enough or there is an idler profile mismatch between the new and old idlers Adding shims to the tie off idler will overco
85. uration and therefore derives its operating power from the 4mA residual loop current A minimum of 20 volts is required to operate with zero ohms load rising by 1 volt for every 50 ohms of load ie 30 volt supply required for 500 ohm load The output can operate with supply voltage of up to 50 volts and provides excellent rejection of power supply ripple and noise The loop power supply thus need not be heavily filtered or regulated An unregulated DC supply is provided on the Masterweigh board which can be used for energisation of the analog loop This supply provides a nominal 28V DC and is isolated from the Masterweigh ground Links are provided on the board to enable this supply to energise the analog output To use an external loop supply configure links LK4 and LK5 on the board appropriately and connect the external supply in series with the analog loop Span calibration of the output is readily performed by accessing the analog calibration in the Menu 1 set up There is no provision for zero adjustment on the analog output Earthing This is achieved by installing the shunt on link located on the lower pcb above the capacitors Installing this link will connect the Masterweigh s digital and analog grounds to power earth Display Backlighting The liquid crystal display used in the Masterweigh provides LED backlighting for improved readability under adverse light conditions If the unmarked key has not
86. vided for information only it is not user adjustable Pressing Enter returns to step 1 above Masterweigh Operation OP 21 MENU ENTRY 15 Access Code Menu Masterweigh 5 provides for 2 levels of user configurable access code If no access codes are activated all Masterweigh 5 menus are accessible all the time An Operator and a Configuration access code may be entered As soon as an access code is activated the user cannot leave the main mass rate total menu and gain entry to the menu system without entering a valid correct access code Entering the correct Configuration access code allows full access to all Masterweigh 5 menus and parameters Entering the correct Operator access code allows limited access to the Masterweigh 5 menu system Step 1 of this menu displays 1 Menu Entry 15 Press Enter to modify access codes Unless the special security key has been installed in link 3 of the CPU PCB the following menus cannot be accessed If the security key is installed then pressing Enter advances to 2 Operator Access Code Enter access code 0 Here a new Operator access code may be entered this can be a number in the range 1 to 32766 Note that entering and Operator access code of 0 zero clears the Operator access code If the security key is installed then pressing Enter advances to 3 Configuration access code Enter access code 0 Here a new Configuration access code may be entered t

OPERATION & INSTALLATION MANUAL

Contents

Download Pdf Manuals

Related Search

Related Contents

OPERATION &amp; INSTALLATION MANUAL

Contents

Download Pdf Manuals

Related Search

Related Contents

OPERATION & INSTALLATION MANUAL