Sartorius MW1P Bedienungsanleitung

Mi111101.eps

WMI5005-e07113

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

Contents

Overview

General Information 04

Service Concept 04

Information 04

Overview of the Models 05

Auxiliary Service Tools and Equipment 05

Accompanying Literature 06

Description of the Equipment

Indicators 07

Function of the Switches 08

Menu Access Switch 08

Repairing the Midrics Indicator

Repairing the Indicator 09

Replacing the Front Panel 10

Blank Display 11

Replacing the Power Cable 11

Replacing the Power PCB 12

Points of Measurement 13

Replacing the Main PCB 14

Quick-test of the A/D Converter 14

Pin Assignment Chart 14

Replacing the Main PCB 15

Terminal Assignments in Midrics Indicators 16

Interface Description 17

RS-232 Interface 17

RS-485 Interface 17

RS-485 Analog Interface 17

Digital I/O Interface 18

COM1 Interface With and Without Clock Chip 18

Adjusting the Weighing Platform

Adjusting the Weighing Platform 19

Junction Box 1 20

Pin Assignments in the Junction Box 1 21

Junction Box 2 22

Cable from the Load Cell

to the Junction Box 2 (Terminals) 23

Cable from the Load Cell

to the Junction Box (Terminals) 24

Adjusting the Off-center Load 26

Setting the Overload Stops 27

1. Weighing Platforms with One Load Cell: Steel 27

2. Weighing Platforms with Four Load Cells: Steel 27

3. Weighing Platforms with One Load Cell:

Stainless Steel 28

4. Weighing Platforms with Four Load Cells:

Stainless Steel 28

Contents

Repairing the Weighing Platforms

Replacing the Connecting Cable 29

Replacing Load Cells 30

Torque Values 31

Replacing the Load Cell Foot 32

Color Codes of the Wiring

for Weighing Platforms, Models MAPS 32

Wiring Diagram for the Load Cells (Junction Box 2) 32

Connections in the Junction Box

for the Load Cells 1-4 33

Connections in the Junction Box

for the A/D Converter 33

Service Specifications

Service Specifications MW...-L / MAP...-L 34

Service Specifications MW...-LCE / MAP...-LCE 35

Service Specifications MW...-NCE / MAP...-NCE 36

Service Specifications MW...-NCE / MAP...-NCE 37

Adjusting the Weighing Platform

Load Cell Connection (Color Assignments) 38

Determining the Resistance for Adjustment

of the Off-center Load 39

Determining Resistance Values 39

Sample Calculation Based on Diagram 2 40

Resistors Available in the E24 Series (+/- 5%): 41

Selecting the Adjustment Resistor 42

Adjusting Off-center Load with 1000 Ohms Initial

Resistance 42

Selecting the Adjustment Resistor: 43

Diagram 1 43

Adjusting Off-center Load with 350 Ohms

Initial Resistance 43

Diagram 2 44

Adjusting Off-center Load with 1000 Ohms

Initial Resistance 44

Error Codes

Err 101-343 ; InF 01-06 45

InF 07-73 46

InF 74-99 47

Description of the Equipment

Activating the Service Mode 48-49

Configuring the A/D Converter 50-51

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.)

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: 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. Any 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:

Qty. Designation

1 Isolating transformer

1 Flintec LCT-01 load cell tester

1 Socket wrench, double hexagon, 10-32 mm, square driver (1/2“)

1 Torque wrench, 10-120 Nm 14x18, stainless steel

Overview | General Information

Qty. Designation

1 Torque wrench, 60-320 Nm 14x18, stainless steel

1 Set of open-ended wrenches with sockets

1 Set of sockets, up to 30 mm (hexagonal, stainless steel)

2 Transport belt (to move load plates or weighing

platforms; available from specialist suppliers)

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)

1 Set of screwdrivers (slotted)

1 Set of screwdrivers (Phillips head)

1 Set of Allen wrenches

1 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 98648-015-33

Overview | General Information

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:

– 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

digital display (Midrics 2 has

additional keys)

– Midrics indicators

are equipped with either cable

glands or D-Sub 25 connectors.

Note: Additional electronic subassemblies are optional.

P1250006a.JPG

Main PCB with H8S

processor, analog/

digital converter and

DC/DC converter

Power PCB

AUT23957.JPG

UniCOM ports in several variants*

COM1 interface in 2

versions*

1 2 3 4 5 6

* Optional

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.

Description of the Equipment

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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.

Note: After completing maintenance or repair work, check the seal between the

front panel and the housing body for damage and replace if necessary. If

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.

Mi171107.eps

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

P1250006a.JPG

P1250006b.JPG

AUT23993.JPG

P1250008.JPG

AUT23993.JPG

Repairing the Midrics Indicator

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