Sartorius Midrics Series - Rice Lake Weighing Systems
Contents
1. 35Nm C3 3 SAG type 011290 500 ko SAG type 011293 7 5 kg C 14Nm SAG type 011294 15 kg C3 14Nm 14Nm 14Nm 20Nm 35Nm 35Nm TEDEA1510 500kg 35Nm 35Nm lastz drehm07 1206 xls After replacing load cells you need to check the overload stops and adjust them if necessary see page 27 28 21 Repairing the Weighing Platforms Replacing the Load Cell Foot To replace a load cell foot use a screwdriver to pry the retainer spring free and push it out or loosen the nut and remove the screw see arrow in the lower illustration on the left Color Codes of the Wiring for Weighing Platforms Models MAPS Platform size Verdrahtungsdiagramm f r den Indicator siehe Seite 33 in mm No 1 2 3 4 5 6 320 x 240 blue green white red gray black 400 x 300 blue green white red gray black 5 500 x 400 blue green white red gray black 650 x 500 blue green white red gray black 650 x 500 green black red white blue brown 800 x 600 blue green white red gray black 800 x 600 green black red white X blue brown 1000 x1000 blue green white red gray black 1250 x 1000 blue green white red gray black 1500 x 1250 blue green white red gray black AUT24001a JPG 1500 x 1500 blue green white red gray black 2000 x 1500 blue green white red gray black 1 MAPP1 2 MAPS1 32 120 HH un GE a BE FR eccL Kabel3 EPS A D Converter AUT24016 a JPG Repairing the Weighing Platforms2. oe k uU E pi a es ab 2 3 BI Eins hy dz p AUT23962 JPG VU AUT23968 JPG Repairing the Midrics Indicators Digital I O Interface e For digital I O interface pin assignments see page 16 COM1 Interface With and Without Clock Chip e For COM1 variant pin assignments see page 16 Sn HAL e oe ee I Tl 5 e The COM1 interface is required for Mu loading software e Jo enable loading of software a solder bridge must be closed on the back of the COM interface see illustration on the right Note X Before commissioning the COM ports the PCBs and any required DIP switches must be checked for Z correct installation and settings F AUT23978a JPG Adjusting the Weighing Platform Version with the junction box 5 Part no 57004 428 01 The illustration on the left shows GF frame 650x500 1 Load cell 1 2 Load cell 2 3 Load cell 3 4 Load cell 4 5 Junction box AUT23995 JPG 19 1 1 2 1 3 1 4 1 5 1 20 Cable to load cell 1 Cable to load cell 2 Cable to load cell 3 Cable to load cell 4 Connecting cable for A D converter indicator Junction Box 1 Junction box open Aut15158 jpg Adjusting the Weighing Platform ou s inding 97 Aut15158b jpg Adjusting the Weighing Platform Pin Assignments in the Junction Box 1 Color Coding Connecting cable 5 1 from the junction box terminals to the A D convert
3. 36 Service Specifications MW NCE MAP NCE Example for the order number of a Midrics full range scale MW2P4 3000RR NCE Applications Material Number of Weighing Platform size Resolution Design load cells capacity kg mm order code MW2 P 4 i WR NCE MAP P 4 3000 WR NCE producibility Off center load T hrs Foor noany Pemissible rmissible y rmissible mi MW MAP NCE 0 02 Weighing Capacity 4 450 zs 0 05 kg 20 kg 0 05 kg 50 kg 0 05 kg M1 50 kg 450 2 ng p Weighing Capacity 2 MW MAP NCE m 5 3070 110 150 Weighing C ity 1 300 kg 04 kg 50 kg 0 1 kg 100 kg 01 kg M1 100 kg 300 kg 02 150 300 Weighing Capacity 2 a ee ee en ee En MW MAP NCE 300 0 1 300 0 2 Weighing C ity 1 600 kg 02 kg 100 kg 02 kg 200 kg 02 kg M1 200 kg 600 kg 04 Weighing Capacity 2 MW MAP NCE 600 0 2 600 0 4 Weighing ity 4 4500 kg 05 kg 500 kg 0 5 kg 500 kg 05 kg M1 500 kg 4500 kg 4 Weighing Capacity 2 t midrics e xls jus Adjusting the Weighing Platform Load Cell Connection Color Assignments Bridge supply voltage Test voltage Br ckenspeisespannung Messspannung miran Excitation Excitation Signal Signal Sale CONS IUC UON ianuae tret Supply Supply Ausgan Ausgan Sense Sense wvagezelen na cinch i f on bs ANMIELKUNELZUF Hersteller gang gang P P Kabelausf hrunc Sartorius Hamburg z B MP58T d 5mm 6 wres green blue green gray white s
4. Wiring Diagram for the Load Cells Junction Box 2 Connections in the Junction Box for the Load Cells 1 4 Pin assignment Supply v pos in Supply v neg in Designation V V Signal Signal Sense Sense GND D Sartorius Hamburg MP58T green cable Variant 1 Supply red Supply blue Output green Output gray 4 Sense white Sense black screen gr Shield Variant 2 blue black white red green gray Shield 2 Midrics 011 gray cable Connections in the Junction Box for the A D Converter Pin assianment Supply v pos in Supply v neg in Shield wire 4 Shield wire Shield 3 MAPPA MAPSA Test signal pos out Test signal neg out Designation V V MAPS1 Signal Signal Sense Sense GND GF IG Variant 3 blue black brown white red pink green gray Shield Variant 4 com green black red white blue brown Shield 33 Service Specifications MW L MAP L Example for the order number of a Midrics full range scale MW1P4 1500RR LCE Applications Material Number of Weighing Platform size Resolution Design load cells capacity kg mm order code MAP ro producibility Off center load T Posay Eccentricity nearity Permissible emine missible missible le EEE 0 001 0001 kg 3 8 9 oo kg 0 002 Class 700 1500 ju
5. if control limits are too low or too high Cannot store the current weight value e g the transaction counter has reached its limit Data not found or unreadable Error Codes Solution Contact your local Service Center for details on changing settings Check whether Tare zero at power on is set 1 12 Zero the scale Put a heavier weight on the scale Contact your local Service Center Define a lower value for the minimum load in the Application settings menu item 3 6 Change menu setting or perform Close function Check the interface and cable Contact your local Service Center None None Contact your local Service Center 47 mm Ll Vaal LI l ha Zu Cause Function is blocked e g menu is locked No weighing platform connected No weighing platform connected No weighing platform connected Error Codes Solution None Connect weighing platform Connect weighing platform Connect weighing platform Activating the Service Mode Description of the Equipment Switch the device on and immediately during the initialization of the device press briefly to display the menu LE TI IE Il Click on the menu item Select Device parameter SE TUF Click on the menu item LUJE press key until the LUJE appears in the display If a password is requested at this point enter the service password see Appendix and continue once the servi
6. SENSE_POS Sense Sense SENSE_NEG Sense Sense OUT_POS Measuring voltage positive Signal OUT_NEG Measuring voltage negative Signal OUT_POS Measuring voltage positive Signal To connect the cable the wires must be connected to the inner terminals marked in the illustration on page 20 22 Note The color coding of the connecting cable A D converter indicator to 4 junction box might be different when connecting a non Sartorius platform to the Midrics indicator 23 24 AUT24000 JPG Adjusting the Weighing Platform Cable from the Load Cell to the Junction Box Terminals See below for the colors of the wires the casing is gray Colors Function Terminal Ye yellow Shield BI blue BR POS Bridge supply voltage Supply Blk black BR NEG Bridge supply voltage Supply Gn green SENSE POS Sense Sense Gr gray SENSE NEG Sense Sense Rd red OUT NEG Measuring voltage negative Signal Wh white OUT POS Measuring voltage positive Signal The terminal strip designations and the order of the terminals 1 4 are marked on the PCB The sequence of the pin assignments of the terminals 1 4 should run from the outside to the inside AUT23995b JPG AUT23997a JPG Adjusting the Weighing Platform Procedure for Off center Load Adjustment Proceed as follows to adjust the off center load using the junction box Stand the weighing platfo
7. connect all subassemblies again measuring the supply voltage in each case The voltage at the power supply output connector A see page 12 is 15V 0 3 V direct current The output voltages of the DC DC converter are listed on page 13 Replacing the Power Cable Disconnect the cable from the power source Open the housing Replace the cable ETI Q 7 After replacing the power cable use a torque wrench to tighten the cable gland to 3 Nm aa pg netz jpg AUT23977a JPG 14 dh l 4 3 er netzt_kappe jpg netzteil jpg Repairing the Midrics Indicators Replacing the Power PCB Disconnect the cable from the power source Pry the protective cap from the power PCB To do this insert the end of a slotted head screwdriver into each of the four openings on the protective cap and carefully push the retainer clips located further down to one side Remove the protective cap and disconnect the two wires blue brown Unplug connector A remove the 2 screws and replace the power supply After replaceing the PCB make sure to return the protective cap to its original position Repairing the Midrics Indicators Points of Measurement 4 7 Note a Z Use a digital voltmeter Ve bb ee ws riui DC setting to measure voltages win against ground earth No MIYTTUUNSTSN TNNT particular points of measurement JL DE ee E are defined for this procedure for this reason use a thin test
8. for reference load cell 498 kg load cell with the lowest readout value Readout for load cell being adjusted 501 1 kg G D 2 3 kg R R 0 x G D R 1000 ohms x 2 3 kg R 4 6 ohms G T 500 kg In this example note that the test weight 500 kg is also distributed over the other load cells which means that the weight on the load cell being tested is somewhat lighter To compensate for this effect always use the next higher resistor value R 4 7 ohms resistor to be installed see page 42 Adjusting the Weighing Platform Resistors available in the E24 Series 5 Part no 57004 433 01 0 39 ohms 57004 434 01 0 82 ohms 57004 435 01 1 20 ohms 57004 436 01 1 60 ohms 57004 437 01 2 00 ohms 57004 438 01 2 70 ohms 57004 439 01 3 00 ohms 57004 440 01 3 30 ohms 57004 441 01 3 90 ohms 57004 442 01 4 70 ohms 57004 443 01 5 60 ohms A set of the resistors listed here containing 3 of each type can be ordered under part no 69CW0106 val Note Q On stainless steel models the IP65 protection must be checked after 7 closing the junction box 41 Adjusting the Weighing Platform Selecting the Adjustment Resistor Adjusting Off center Load with 1000 Ohms Initial Resistance Adjustment resistor in ohm Test weight Test weight Test weight Test weight Test weight 50kg 100kg 200kg 500kg 1000kg Off center in kg 42 0 00 0 02 0 02 0 04 0 04 0
9. sensor Note Once ADC configuration has been completed an adjustment of the weighing platform calibration adjustment and linearization must be carried out Close the menu access switch Menuws re JPG 91 Sartorius AG Weender Landstrasse 94 108 37075 Goettingen Germany Internet http www sartorius com Copyright by Sartorius AG Goettingen Germany All rights reserved No part of this publication may be reprinted or translated in any form or by any means without the prior written permission of Sartorius AG The status of the information specifications and illustrations in this manual is indicated by the date given below Sartorius AG reserves the right to make changes to the technology features specifications and design of the equipment without notice Status November 2007 Sartorius AG Goettingen Germany Printed in Germany on paper that has been bleached without any use of chlorine W1A000 I K Publication No WMI5005 e07113
10. the load cells Note The off center load is adjusted only in weighing platforms that have 4 load TA cells Mechanical asymmetries can result in off center loading errors that exceed u permissible tolerance limits Such errors must be compensated by solde ring resistors to the PCB in the junction box The 4 solder bridges for the resistors are short circuited at the factory see the illustration on the left note the 4 solder bridges and the sequence of the load cells To minimize the off center loading error use the load cell with the lowest readout value as a reference Then adjust the other load cells to this value by adding resistors Adjusting the Weighing Platform Setting the Overload Stops 1 Weighing Platforms with One Load Cell Steel Platform nominal Test weight for Test weight for capacity in kg middle stops in kg corner stops in kg 3 3 10 6 6 10 15 15 10 30 30 10 60 60 10 150 150 10 300 300 10 AUT24013 JPG 2 Weighing Platforms with Four Load Cells Steel Platform nominal Test weight for Test weight for Nominal load cell capacity in kg middle stops capacity in corner measurement path in kg stop in kg in mm in kg 150 0 4 MP58T 91kg 300 E 0 4 MP58T 227kg 600 0 6 MP58T 454kg 1500 0 6 MP58T 1134kg 3000 1 0 MP58T 2268kg AUT24003a JPG 27 28 AUT23706 JPG AUT24003a JPG Adjusting t
11. 06 0 06 0 07 0 08 0 09 0 1 0 13 0 13 0 14 0 15 0 16 0 16 0 19 0 19 0 23 0 23 0 27 0 20 0 33 0 00 0 05 0 05 0 07 0 08 0 11 0 12 0 15 0 16 0 19 0 20 0 26 0 27 0 29 0 30 0 32 0 33 0 38 0 39 0 46 0 47 0 55 0 56 0 66 Important These are calculated estimated values Diagram 1 Adjustment resistor in ohms 5 5 4 5 20 kg Selecting the Adjustment Resistor Adjusting Off center Load with 350 Ohms Initial Resistance 50 kg 100 kg Adjusting the Weighing Platform 200 kg 500 kg I 20 kg U 50kg E 100 kg 200 kg e 500 kg 1000 kg 1000 kg 0 5 1 5 2 5 3 3 5 4 5 5 Off center in kg 43 Diagram 2 44 Adjustment resistor in ohms 20kg 50kg 100 kg Adjusting the Weighing Platform Adjusting Off center Load with 1000 Ohms Initial Resistance 200 kg 500 kg 1000 kg Test load kg 20 kg 50kg 100 kg 200 kg 500 kg 1000 kg 0 5 2 Off center in kg 2 5 3 5 Error Codes Error codes are shown on the main display Err codes are shown continuously Inf messages are shown for 2 seconds after which the program returns automatically to the weighing mode Display Cause Solution Ere Eom aH Key is stuck Release key or Key pressed at power on contact your local Service Center
12. D TXD PARES OUT2_HIGH MAJOR gt OUT1_LOW SET OUT1 HIGH LOAD PRINTER LINE OUT IN5 LOW RESET OUT LINE OUT IN5 HIGH GND GND IN4 LOW GND GND IN4 HIGH 5V OUT IN3_ LOW 5V switched IN3_HIGH GND IN2_ LOW GND IN2_HIGH Dic INT LOW LINE OUT IN1 HIGH a 1 2 2 4 5 6 7 8 not electrically isolated EEE EJ b Tw CUN mm oem Wie Eom Dutina d4 pud pe _ amd a al moms cs A Bsw2 me a ga S E us LJ Ph ow A LJ T LJ T T AUT23964 JPG Repairing the Midrics Indicators Interface Description RS 232 Interface e For RS 232 interface pin assignments see page 16 RS 485 Interface e For RS 485 interface pin assignments see page 16 Switch SW 1 1 SW1 2 SW 1 3 SW 1 4 SW2 1 SW2 2 SW2 3 SW2 4 Function when switch closed Terminating resistor transmitting 120 Q Bias resistor transmitting side TxD pull up 680 Q Bias resistor transmitting side TxD pull down 680 Q RS 422 mode open RS 485 mode Terminating resistor receiving side 120 Q Bias resistor receiving side RxD pull up 680 Q Bias resistor receiving side RXD pull down 680 Q Not used Analog Interface e For analog interface pin assignments see page 16 Switch Function SW1 1 SW1 2 open open 4 20mA closed open 0 10V open closed 0 20mA closed closed 0 24mA SW1 3 For future applications SW1 4 For future applications 17 18 E LI 5
13. Er den Program memory defective Contact your local Service Center Err J333 Verified weighing platform not compatible Connect a compatible weighing platform with the connected terminal Err og Operating parameter memory EEPROM Turn the scale off and then on again defective If Err 340 is still displayed contact your local Service Center Eer i Flash lost data Turn the scale off and then on again If Err 340 is still displayed contact your local Service Center Err 343 Data lost from the memory module for Contact your local Service Center transaction numbers in external alibi memory InF Li i Data output not compatible with output Change the menu settings format inF uc Calibration adjustment condition Calibrate only when zero is displayed not met for example not tared or Press to tare there is a load on the weighing pan Unload the scale inF US Adjustment could not Allow the scale to warm up again and then be completed within a certain time repeat the adjustment process in UG Built in calibration weight defective Contact your local Service Center 45 Cause Function not allowed in scales verified for use in legal metrology The load on the scale is too heavy to zero the readout Taring is not possible when the gross weight Is a minus value Error in storing reference value load is too light Error in initializing an application Minimum load not reached Indicator is in XBPI mode Cannot store the current weight value e g
14. T UM MS LT 4 4 Replacing the Main PCB Mertens Note If communcation problems occur during communication with connected T devices such as a printer check the cable connections and the data Q transfer parameters first if the error source is not found start the d internal test program 2 an vaD Switch off the indicator Press and hold the key while switching the indicator on again All segments are displayed YDOO1M 232 YDOOIM 232CLK In case of defect replace the main PCB without clock chip with clock chip After replacing the main PCB use the PpLoadWHB8 exe program to load the software F Note To load the software COM PCB model YDOO1M 232 or YDOO1M 232CLK Is required UA Following installation and commissioning of the new main PCB the display backlighting should blink on and off 15 Repairing the Midrics Indicators Terminal Assignments in Midrics Indicators COM with Variant UniCOM with Option Standard data output Data output Clock RS232 RS485 4 20mA Digital 1 0 YDO01M 232 YDOO1M 232CLK YDOO1M 232CO YDOO1M 485 YDOO1M 20MA YDOO1M IO LOAD PRINTER LOAD PRINTER CTS TXD out OUT5 LOW RESET OUT RESET OUT DIR TXD in OUT5 HIGH 5V OUT 5V OUT RXD RXD V_out OUT4_LOW GND GND TXD RXD V_in OUT4_HIGH CTS CTS GND GND elec isol GND elec isol OUT3_LOW DTR DTR Universal In GND elec isol GND elec isol OUT3_HIGH RXD RXD MINOR lt OUT2_LOW TX
15. ce password has been accepted gt gt gt 06 gt 06 Description of the Equipment rnc pa pa Select the menu item COTE and enter the service password CLIC cc Use keys ED Saving the service password When the service mode is activated an 5 appears in the top right hand corner of the display Return to Code in the service mode Return to Setup in the service mode 49 Description of the Equipment Configuring the A D Converter Open the menu access switch Remove the cap that covers the menu access switch on the left hand side of the back of the indicator To do this move the switch to the left towards the interface connectors open position Activate the service mode see page 48 49 Select weighing platform and confirm c iM _ Menu item I I Menu item itt g d toenter gt Description of the Equipment Select the menu item ADC configuration and confirm Select whether a standard configuration STAND or a verifiable configuration VERIF should be carried out in this example standard configuration See 98648 014 89 WMI6001 d07063 Operating Instructions for a detailed description of the procedure Once you have completed the configuration save the data using the menu item The A D converter can now be treated like any standard weighing platform in connection with the load
16. er indicator See page 33 for the colors of the wires the casing is gray and black Function Terminal Shield BBR_POS Bridge supply voltage Supply BR_NEG Bridge supply voltage Supply SENSE_POS Sense Sense SENSE_NEG Sense Sense OUT_POS Measuring voltage positive Signal OUT_NEG Measuring voltage negative Signal The shield is connected to the housing by means of the cable gland see page 29 To connect the cable the wires must be connected to the inner terminals marked in the illustration on page 19 Note The color coding of the connecting cable A D converter indicator to junction box might be different when connecting a non Sartorius platform to the Midrics indicator 7 21 Adjusting the Weighing Platform Junction Box 2 Junction box open Cable to load cell 1 Cable to load cell 2 Contacts to connect Cable to load cell 3 Cable to load cell 4 Connecting cable for A D converter indicator LC Output Signal sidai e grey green AUT23982 JPG 120 AUT23982 JPG EU saig see sees asses SP i T Qu AA Adjusting the Weighing Platform Cable from the Load Cell to the Junction Box 2 Terminals Color Coding See page 33 for the colors of the wires the casing is gray or black Function Terminal Screen Shield BBR_POS Bridge supply voltage Supply BR_NEG Bridge supply voltage Supply
17. g transformer must be installed between the indicator and mains before performing work that entails opening the Midrics indicator housing To open the Midrics indicator remove the four nuts as shown in the illustration on the left y l After completing maintenance or repair work check the seal between the A u front panel and the housing body for damage and replace if necessary If TERE the Midrics indicator in question has an IP65 protection rating a special test procedure is used to check the IP65 protection after the housing has been closed P1250008 JPG Repairing the Midrics Indicator i wmartorius Replacing the Front Panel In the case of a defective key keypad overlay or display the entire front panel must be replaced There are two front panel variants Midrics 1 and Midrics 2 The only difference between the two is the range of operating keys If the indicator housing seal is defective it must be replaced When installing a new seal make sure it rests entirely within the housing and is not caught between the upper and lower housing parts when you close the indicator P1250008 JPG Repairing the Midrics Indicator Blank Display If the display is blank dark disconnect the equipment from mains open the housing and disconnect all cables and wires from the subassemblies Then connect the equipment to power again through an isolating transformer and
18. he Weighing Platform 3 Weighing Platforms with One Load Cell Stainless Steel Platform nominal Test weight for Test weight for capacity in kg middle stops in kg corner stops in kg 3 3 10 6 6 10 15 15 10 30 30 10 60 60 10 150 150 10 4 Weighing Platforms with Four Load Cells Stainless Steel Platform nominal Test weight for Test weight for Nominal load cell capacity in kg middle stops capacity in corner measurement path in kg stop in kg mm in kg 150 z 0 4 MP58T 91kg 300 0 4 MP58T 227kg 600 u 0 6 MP58T 454kg 1500 0 6 MP58T 1134kg 3000 1 0 MP58T 2268kg Repairing the Weighing Platforms fctO1 23 eps Replacing the Connecting Cable If the connecting cable from junction box to Midrics indicator needs to be replaced on a weighing platform with four load cells or if the load cell needs to be replaced on a platform with only one load cell open the Midrics indicator and disconnect the cable from the terminal strip of the A D converter Unscrew the cable gland the cable or load cell can now be replaced Remove the isolation and connect the new cable Expose approx 6 cm 2 4 in of the wires 3 in the cable Remove the isolation from approx 1 cm 0 5 in of the wires and affix ferrules to the wire ends hread the cable through the cable gland The shielding 1 must have contact with the clamps 2 Connection to ground via the
19. hield grounded blau gr n grau wei d 5mm 6 adrig gr n Abschirmung geerdet d 5mm 6 wres green green gray shield grounded EILIRI ch er a Abschirmung geerdet white blue brown wei blau braun Combics 011 blue blau green gr n GWT TEDEA 12 12 06 xls 38 Adjusting the Weighing Platform Determining the Resistance for Adjustment of the Off center Load Determining Resistance Values Place the test weight on each load cell in turn and write down each displayed value Using the lowest displayed value as the basis calculated the resistance values for the other load cells in accordance with the following equation Equation R R 0 x G D G T R required resistance in ohms R 0 Initial resistance in the load cell being adjusted in ohms if not specified in the specification sheet measured between Signal OUT POS positive measuring voltage and Signal OUT NEG negative measuring voltage G D Difference between lowest off center loading error from reference load cell and the off center load value displayed for the weigh cell in kg G T Test weight applied in kg Solder the required resistor into the bridge of the load cell being adjusted Then perform calibration adjustment again 39 40 Adjusting the Weighing Platform Sample Calculation Based on Diagram 2 Initial resistance in the load cell 1000 ohms est weight 500 kg Readout
20. ie Sartorius Service Manual Sartorius Midrics Series Models MW1P MW2P MW1S MW2S for Complete Midrics Scales Models MIS1 MIS2 for Midrics Indicators and Models MAPP1 MAPS1 MAPP4 MAPS4 for Midrics Weighing Platforms including Service Specifications WMI5005 e07113 Contents Overview General Information Service Concept Information Overview of the Models Auxiliary Service Tools and Equipment Accompanying Literature Description of the Equipment Indicators Function of the Switches Menu Access Switch Repairing the Midrics Indicator Repairing the Indicator Replacing the Front Panel Blank Display Replacing the Power Cable Replacing the Power PCB Points of Measurement Replacing the Main PCB Quick test of the A D Converter Pin Assignment Chart Replacing the Main PCB Terminal Assignments in Midrics Indicators 04 04 04 05 05 06 07 08 08 09 10 11 11 12 13 14 14 14 15 16 Interface Description RS 232 Interface RS 485 Interface RS 485 Analog Interface Digital I O Interface COM1 Interface With and Without Clock Chip Adjusting the Weighing Platform Adjusting the Weighing Platform Junction Box 1 Pin Assignments in the Junction Box 1 Junction Box 2 Cable from the Load Cell to the Junction Box 2 Terminals Cable from the Load Cell to the Junction Box Terminals Adjusting the Off center Load Setting the Overload Stops 1 Weighing Platforms with One Load Cell S
21. pin and exercise extreme caution to avoid short circuiting the equipment VH rg m he various supply voltages delivered by the DC DC converter can be measured at the following points pn rg hfe wl te EE nr Wore Bor E E m EN M1 15V 5 Input voltage for the DC DC converter M 2 9 2V 5 X Supply voltage for the A D converter M3 49 2V 5 Supply voltage for the A D converter M4 5V 5 Supply voltage for the digital PCB M5 3 3V 5 Supply voltage AUT23902_b JPG AUT23958_c JPG Replacing the Main PCB Repairing the Midrics Indicators Before replacing the main PCB try to read out the data from the main PCB controller using the service software if this is successful you can load the adjustment data in the controller of the new main PCB once it is installed In many cases this precludes the need to adjust the weighing system Quick test of the A D Converter Pin Assignment Chart No Signal designation 1 BR_POS 2 SENSE_POS 3 OUT POS 4 OUT NEG 5 SENSE NEG 6 BR NEG Meaning Voltage Bridge supply voltage 4 5V 0 18V Sense Bridge supply voltage Measuring voltage positive Measuring voltage negative Sense Bridge supply voltage Bridge supply voltage 4 5V 0 23V Repairing the Midrics Indicators 1 Connect the strain gauge simulator and turn the switch to simulate different Main PCB input signals The weight readout should be stable TE x i IUD E
22. r 50 51 Determining the Resistance for Adjustment of the Off center Load 39 Determining Resistance Values 39 Overview General Information Service Concept Prerequisites for performing maintenance and repair work on Sartorius Midrics scales requires considerable experience with both indicators and weighing platforms In case of defects repairs are performed on site Generally the equipment is not replaced Do not connect or disconnect cables to or from the equipment always disconnect the power cable from the wall socket mains supply first Information To ensure safety an isolating transformer must be installed between the indicator and the power supply before performing work that entails opening the Midrics indicator housing On complete Midrics scales check and adjust as necessary Repeatability standard deviation Off center load Span Linearity The procedure is the same as for all scale and weighing platform models Important Overview General Information Overview of the Models The hardware configuration consists of either a Midrics 1 or 2 indicator and Sartorius weighing platform s or a Midrics 1 or 2 indicator and weighing platform s strain gauge load cells from another manufacturer Mechanical and electrical service or repair work on the complete Midrics scale requires considerable experience and for this reason should be performed only by Sartorius technicians trained at the factory An
23. rm with 4 load cells on its side and secure it in this position Remove the four screws S from the junction box Pull approximately 20 to 30 cm of the load cell cables out of the platform see arrow Return the weighing platform to the horizontal and position it next to the junction box The junction box is now accessible for adjustment of the resistors At the conclusion of off center load adjustment follow the instructions above in reverse order to reassemble the weighing platform Important Make sure to push the cables back into the weighing platform 25 Junction Box 1 METZT IE inding 97 jou s Aut15158c jpg Junction Box 2 N oS ndlcatan LEHE on Ei I T Y j ER d A LC Output J g SAK ale is SIgnal grey green AUT23982b JPG 26 i e Adjusting the Weighing Platform Adjusting the Off center Load If the weighing platform has only 1 load cell the off center load is not adjusted in case of error The load cell must be replaced The off center load is adjusted only in weighing platforms that have 4 load cells Mechanical asymmetries can result in off center loading errors that exceed permissible tolerance limits Such errors must be compensated by soldering resistors to the PCB in the junction box The 4 solder bridges for the resistors are short circuited at the factory see the illustration on the left note the 4 solder bridges and the sequence of
24. shield After replacing the cable or load cell use a torque wrench to tighten the cable gland to 5 Nm Note S sl d On stainless steel models the IP67 protection must be checked after Y Z closing the junction box 29 Repairing the Weighing Platforms Replacing Load Cells If an off center load error is detected platforms with one load cell or if the output signal from the load cell is too high or too low inF Ge is displayed during span adjustment replace the load cell Because the mechanical construction of the platforms is basically uncomplicated no detailed description of the disassembly procedure is included here Important Toreplace a load cell in a platform with four load cells use two eye bolts 7 6740 81 in two corners and then lift the weighing platform Remove the plastic caps from the bore holes before inserting the eye bolts he eye bolts can be ordered under spare part number 6740 81 When reassembling the weighing platform make sure to replace any plates that were under the platform frame lastz 1 jpg AUT23705 JPG AUT24012 JPG Ti pcr aM 3 P2020003 JPG Repairing the Weighing Platforms ighten the load cells with the required torque Torque Values 130Nm MP58T 91kg C3 130Nm 130Nm 130Nm 130Nm C3 130Nm 10Nm MP58T 2268kg SAG type 011241 7 5 kg C3 SAG type 011242 15 ko C C3 10Nm 14Nm SAG type 011245 100 kg C3 BENE NNNM
25. st midrics e xls 34 Service Specifications MW LCE MAP LCE Example for the order number of a Midrics full range scale MW2P1 300FE LCE Applications Material Number of Weighing Platform size Resolution Design load cells capacity kg mm order code FE ICE MAP P 1 FE LCE producibility Off center load T Buren Eccentricity noany Permissible Permissible missible zzi ped MAP LCE 0 001 ETE 0 001 kg ne 0 001 KIJ ETETE oo g 075223 kg 9 2 2 3 0002 kg Class MW MAP LCE IMW MAP LCE just midrics e xls 3 C1 Service Specifications MW NCE MAP NCE Example for the order number of a Midrics full range scale MW2P1 6DC NCE Applications Material Number of Weighing Platform size Resolution Design load cells capacity kg mm order code MW2 1 6 Dc NCE MAP S 1 6 DC NCE bility Off center load Ser tere Te Pemissible emine missible EEES Were Test Test se 0 90 7 1 11 5 Weighing Capacity 1 0 1 i 3 ko oco 9 Tus Kg Weighing Capacity 2 0 5 0 7 1 5 2 2 3 3 6 Weighing Capacity 2 IMW MAP NCE Weighing Capacity 1 3 7 11 15 l 5 10 0 01 10 10 kg 0 01 kg du 10 k9 30 kg 0 02 kg Kg 15 30 kg 0 02 kg 10 n Weighing Capacity 1 60 kg 0 02 kg 20 0 02 kg 20 Kg 0 02 kg Mt 20 id 60 kg 0 4 kg Kg 30 60 kg 04 kg 10 n Weighing Capacity 2 J 19 just midrics e xls
26. teel 2 Weighing Platforms with Four Load Cells Steel 3 Weighing Platforms with One Load Cell Stainless Steel 4 Weighing Platforms with Four Load Cells Stainless Steel 17 17 17 17 18 18 19 20 21 22 23 24 26 27 27 27 28 28 Contents Repairing the Weighing Platforms Sample Calculation Based on Diagram 2 40 Replacing the Connecting Cable 29 Resistors Available in the E24 Series 5 41 Replacing Load Cells 30 Selecting the Adjustment Resistor 42 Torque Values 31 Adjusting Off center Load with 1000 Ohms Initial Replacing the Load Cell Foot 32 Resistance 42 Color Codes of the Wiring Selecting the Adjustment Resistor 43 for Weighing Platforms Models MAPS 32 Diagram 1 43 Wiring Diagram for the Load Cells Junction Box 2 32 Adjusting Off center Load with 350 Ohms Connections in the Junction Box Initial Resistance 43 for the Load Cells 1 4 33 Diagram 2 44 Connections in the Junction Box Adjusting Off center Load with 1000 Ohms for the A D Converter 53 Initial Resistance 44 Service Specifications Error Codes Service Specifications MW L MAP L 34 Err 101 343 InF 01 06 45 Service Specifications MW LCE MAP LCE 35 InF 07 73 46 Service Specifications MW NCE MAP NCE 36 InF 74 99 47 Service Specifications MW NCE MAP NCE 37 Description of the Equipment Adjusting the Weighing Platform Activating the Service Mode 48 49 Load Cell Connection Color Assignments 38 Configuring the A D Converte
27. the Equipment The complete Midrics scales from Sartorius are primarily used in industry Because there are a number of hardware configurations to choose from Midrics models are constructed according to customer requirements The complete Midrics scale consists of A choice of weighing platforms with capacities from 3 kg to 3000 kg in stainless steel or steel and indicators The Midrics 1 2 indicators consist of Front panel with keypad and UniCOM ports in several variants COM interface in 2 digital display Midrics 2 has versions additional keys Main PCB with H85 processor analog digital converter and DC DC converter Optional P1250006a JPG Midrics indicators are equipped with either cable glands or D Sub 25 connectors AUT23957 JPG Power PCB Q Note Additional electronic subassemblies are optional closed verriegelungs_schalter eps Description of the Equipment Function of the Switches This switch must be open to work with the service software or to configure the A D converter e g Trade configuration If the menu access switch is closed the error message ACCESS SWITCH LOCKED is displayed in the service program and the indicator shows L underload or H overload In this case the A D converter cannot be configured If adjustment is necessary span linearity the 2 window is active Repairing the Midrics Indicator Indicator Important 0 11 An isolatin
28. y attempt to perform repair work can result in damage to the equipment Auxiliary Service Tools and Equipment In addition to standard tools you will need the following special tools to work on the complete Midrics scale Oty Designation Isolating transformer Flintec LCT 01 load cell tester Socket wrench double hexagon 10 32 mm square driver 1 2 Torque wrench 10 120 Nm 14x18 stainless steel en en 0 Overview General Information Oty Designation Torque wrench 60 320 Nm 14x18 stainless steel Set of open ended wrenches with sockets Set of sockets up to 30 mm hexagonal stainless steel Transport belt to move load plates or weighing platforms available from specialist suppliers N e m 2 Ring lugs stainless steel for moving the load plates or weighing platforms available from specialist suppliers 1 Set open ended wrenches spanners up to 24 mm stainless steel 1 Threaded rod M 16x120 for lifting the weighing platform available from specialist supplier Set of screwdrivers slotted Set of screwdrivers Phillips head Set of Allen wrenches Strain gauge simulator __ Accompanying Literature Operating instructions for Complete Midrics 1 2 Scales WMW6004 e06101 98648 014 94 Operating instructions for Midrics 1 2 Indicators WMI6001 e06101 98648 014 89 Operating instructions for Painted or Stainless Steel Weighing Platforms WMA6037 e06101 98648 01 5 33 Description of
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