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Summary of Contents for Sartorius MW1P
- Page 1 Service Manual Sartorius Midrics Series Models MW1P | MW2P | MW1S | MW2S for Complete Midrics Scales Models MIS1 | MIS2 for Midrics Indicators Models MAPP1 | MAPS1 MAPP4 | MAPS4 for Midrics Weighing Platforms including Service Specifications Mi111101.eps WMI5005-e07113...
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Page 2: Table Of Contents
Contents Overview Interface Description General Information RS-232 Interface Service Concept RS-485 Interface Information RS-485 Analog Interface Overview of the Models Digital I/O Interface Auxiliary Service Tools and Equipment COM1 Interface With and Without Clock Chip Accompanying Literature Adjusting the Weighing Platform Description of the Equipment Adjusting the Weighing Platform Indicators... - Page 3 Contents Sample Calculation Based on Diagram 2 Repairing the Weighing Platforms Resistors Available in the E24 Series (+/- 5%): Replacing the Connecting Cable Selecting the Adjustment Resistor Replacing Load Cells Adjusting Off-center Load with 1000 Ohms Initial Torque Values Resistance Replacing the Load Cell Foot Selecting the Adjustment Resistor: Color Codes of the Wiring...
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Page 4: General Information
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. -
Page 5: Overview Of The Models
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. Important:... -
Page 6: Accompanying Literature
Overview | General Information Qty. 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) Ring lugs (stainless steel;... -
Page 7: Description Of The Equipment
Description of 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: –... -
Page 8: Function Of The Switches
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”... -
Page 9: Repairing The Midrics Indicator
Repairing the Midrics Indicator Indicator Important: An isolating 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. -
Page 10: Replacing The Front Panel
Repairing the Midrics Indicator Replacing the Front Panel In the case of a defective key, keypad overlay, or display, the entire front panel must be replaced. P1250006b.JPG P1250006a.JPG There are two front panel variants, Midrics 1 and Midrics 2. The only difference between the two is the range of operating keys. -
Page 11: Blank Display
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 connect all subassemblies again, measuring the supply voltage in each case. -
Page 12: Replacing The Power Pcb
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. -
Page 13: Points Of Measurement
Repairing the Midrics Indicators Points of Measurement Note: Use a digital voltmeter (DC setting) to measure voltages against ground (earth). No particular points of measurement are defined for this procedure; for this reason, use a thin test pin and exercise extreme caution to avoid short-circuiting the equipment. -
Page 14: Replacing The Main Pcb
Repairing the Midrics Indicators Replacing the Main PCB – 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. -
Page 15: Replacing The Main Pcb
Repairing the Midrics Indicators 1. Connect the strain-gauge simulator and turn the switch to simulate different input signals. The weight readout should be stable. Main PCB Replacing the Main PCB Note: If communcation problems occur during communication with connected devices (such as a printer), check the cable connections and the data transfer parameters first;... -
Page 16: Terminal Assignments In Midrics Indicators
Repairing the Midrics Indicators Terminal Assignments in Midrics Indicators COM1 with Variant: UniCOM with Option: Standard data output Data output Clock RS232 RS485 4-20mA Digital I/0 Pin YDO01M-232 YDO01M-232CLK YDO01M-232CO YDO01M-485 YDO01M-20MA YDO01M-IO LOAD_PRINTER LOAD_PRINTER TXD+ I_out (+) OUT5_LOW RESET_OUT RESET_OUT TXD- I_in (-) -
Page 17: Interface Description
Repairing the Midrics Indicators Interface Description RS-232 Interface • For RS-232 interface pin assignments, see page 16. RS-485 Interface • For RS-485 interface pin assignments, see page 16. AUT23965.JPG Switch Function when switch closed Terminating resistor, transmitting 120 Ω SW1-1 Bias resistor, , transmitting side (TxD+, pull-up) 680 Ω... -
Page 18: Digital I/O Interface
Repairing the Midrics Indicators Digital I/O Interface • For digital I/O interface pin assignments, see page 16. AUT23962.JPG COM1 Interface With and Without Clock Chip • For COM1 variant pin assignments, see page 16. • The COM1 interface is required for loading software. -
Page 19: Adjusting The Weighing Platform
Adjusting the Weighing Platform Version with the junction box (5) Part no. 57004-428-01 The illustration on the left shows GF frame 650x500 Load cell 1 Load cell 2 Load cell 3 Load cell 4 Junction box AUT23995.JPG... -
Page 20: Junction Box
Adjusting the Weighing Platform Junction Box 1 Junction box; open. 1.1 Cable to load cell 1 2.1 Cable to load cell 2 3.1 Cable to load cell 3 4.1 Cable to load cell 4 5.1 Connecting cable for A/D Contacts to connect converter / indicator the cable 5.1 Aut15158.jpg... -
Page 21: Pin Assignments In The Junction Box 1
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. Aut15158b.jpg... -
Page 22: Junction Box 2
Adjusting the Weighing Platform Junction Box 2 Junction box; open. 1.1 Cable to load cell 1 2.1 Cable to load cell 2 Contacts to connect 1.1 - 4.1 3.1 Cable to load cell 3 the cable 5.1 4.1 Cable to load cell 4 5.1 Connecting cable for A/D converter / indicator... -
Page 23: Cable From The Load Cell To The Junction Box 2 (Terminals)
To connect the cable, the wires must be connected to the inner terminals (marked in the illustration on page 20/22). Note: 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. AUT23982.JPG... -
Page 24: Cable From The Load Cell To The Junction Box (Terminals)
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 Bl (blue) BR_POS (Bridge supply voltage +) Supply + Blk (black) BR_NEG (Bridge supply voltage -) Supply -... - Page 25 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 platform (with 4 load cells) on its side and secure it in this position. – Remove the four screws (S) from the junction box. –...
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Page 26: Adjusting The Off-Center Load
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 Junction Box 1 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. -
Page 27: Setting The Overload Stops
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 + 10% — 6 + 10% —... -
Page 28: Weighing Platforms With One Load Cell: Stainless Steel
Adjusting the 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 + 10% — 6 + 10% —... -
Page 29: Repairing The Weighing Platforms
Repairing the Weighing Platforms Replacing the Connecting Cable If the connecting cable (from junction box to indicator) needs to be Midrics 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 indicator and Midrics disconnect the cable from the terminal strip of the A/D converter. -
Page 30: Replacing Load Cells
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 02 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. -
Page 31: Torque Values
Repairing the Weighing Platforms – Tighten the load cells with the required torque. Torque Values Load cell designation Torque value Load cell designation Torque value SAG type 011469/220kg C3 130Nm SAG type 011246/50 kg C3 14Nm SAG type 011231/550kg C3 130Nm SAG type 011247/100 kg C3 14Nm... -
Page 32: Replacing The Load Cell Foot
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). -
Page 33: Wiring Diagram For The Load Cells (Junction Box 2)
Sense - - Sense black gray 7 Shield screen gr. (Shield) (Shield) Sartorius Hamburg MP58T, green cable Midrics (011...), gray cable Kabel3.EPS A/D Converter Connections in the Junction Box for the A/D Converter Pin assignment Designation Variant 3 Variant 4 com 1 Supply v. -
Page 34: Service Specifications Mw
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 1500 1500 Reproducibility Off-center load Span Linearity TC S... -
Page 35: Service Specifications Mw...-Lce / Map
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 Reproducibility Off-center load Span Linearity TC S iso C AL (R epeatability) -
Page 36: Service Specifications Mw
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 Reproducibility Off-center load Span Linearity TC S iso C AL (R epeatability) -
Page 37: Service Specifications Mw
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 3000 3000 Reproducibility Off-center load Span Linearity TC S... -
Page 38: Adjusting The Weighing Platform
-Ausgang +Sense -Sense Wägezellen Anmerkung zur +Eingang -Eingang +Output -Output Hersteller Kabelausführung d 5mm, 6 wires, green, shield grounded Sartorius Hamburg blue green gray white black d 5mm, 6 adrig, grün, (z.B.: MP58T/...) blau grün grau weiß schwarz Abschirmung geerdet... -
Page 39: Determining The Resistance For Adjustment Of The Off-Center Load
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: Equation:... -
Page 40: Sample Calculation Based On Diagram 2
Adjusting the Weighing Platform Sample Calculation Based on Diagram 2 Initial resistance in the load cell: 1000 ohms. - Test weight: 500 kg - Readout for reference load cell = 498 kg (load cell with the lowest readout value). - Readout for load cell being adjusted = 501.1 kg - G G G G G (D) = 2.3 kg R R R R R = R(0) x G(D) R R R R R = 1000 ohms x 2.3 kg... -
Page 41: Resistors Available In The E24 Series (+/- 5%)
Adjusting the Weighing Platform Resistors available in the E24 Series (+/- 5%): Part no. 57004 - 433 - 01 0.39 0.39 0.39 ohms 0.39 0.39 ohms ohms ohms ohms 57004 - 434 - 01 0.82 0.82 0.82 ohms 0.82 0.82 ohms ohms ohms... -
Page 42: Selecting The Adjustment Resistor
Adjusting the Weighing Platform Selecting the Adjustment Resistor Adjusting Off-center Load with 1000 Ohms Initial Resistance Adjustment Test weight Test weight Test weight Test weight Test weight resistor 50kg 100kg 200kg 500kg 1000kg (in ohm) Off-center (in kg) 0.00 - 0.02 0.00 - 0.05 0.0 - 0.1 0.0 - 0.1... -
Page 43: Selecting The Adjustment Resistor
Adjusting the Weighing Platform Selecting the Adjustment Resistor: Diagram 1 Adjusting Off-center Load with 350 Ohms Initial Resistance 50 kg 100 kg 200 kg 20 kg 500 kg 20 kg 50 kg 100 kg 200 kg 500 kg 1000 kg 1000 kg Off-center (in kg) -
Page 44: Diagram 2
Adjusting the Weighing Platform Diagram 2 Adjusting Off-center Load with 1000 Ohms Initial Resistance 20 kg 50 kg 100 kg 200 kg 500 kg 1000 kg Test load (kg) 20 kg 50 kg 100 kg 200 kg 500 kg 1000 kg Off-center (in kg) -
Page 45: Error Codes
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 Err 101 - 104 Key is stuck Release key or Key pressed at power on contact your local Service Center... - Page 46 Error Codes Display Cause Solution Function not allowed in scales Contact your local Service Center Inf 07 verified for use in legal metrology for details on changing settings Inf 08 The load on the scale is too heavy to zero Check whether “Tare/zero at power on”...
- Page 47 Error Codes Display Cause Solution Function is blocked (e.g., menu is locked) None Inf 74 Inf 98 No weighing platform connected Connect weighing platform Inf 99 No weighing platform connected Connect weighing platform NO WP No weighing platform connected Connect weighing platform...
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Page 48: Description Of The Equipment
Description of the Equipment Activating the Service Mode Switch the device on and immediately (during the initialization of the device) press briefly to display the menu Setup Click on the menu item setup Setup Select Device parameter WP-1 Code Click on the menu item (press key k until the Code appears in the display) - Page 49 Description of the Equipment 202122 Code Select the menu item and enter the service password » « Use keys ( ) k p Saving the service password »S« When the service mode is activated an appears in the top right-hand corner of the display.
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Page 50: Configuring The A/D Converter
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“) Menuws-li.JPG Activate the service mode (see page 48-49) - Page 51 Description of the Equipment – Select the menu item ADC configuration and confirm ADC-CON – Select whether a standard configuration (STAND) or a verifiable configuration Stand. (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 –...
- Page 52 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.
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