Mettler Toledo Viper M, Viper L, Viper D, Viper T, Viper RM Service Manual

Service Manual METTLER TOLEDO

Viper M, L, D and T Scales Viper RM, RL, RD and RT Terminals

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General

About this service manual Service concept Product overview

1

2

Viper scales with small platform

Strain Gauge, IP65, MonoBloc, Ex

3

Viper scales with large platform

Strain Gauge, IP65, MonoBloc, Ex

4

5

Technician setup

6

Miscellaneous information

7

8

9

10

11

12

Exploded view drawings Spare parts lists

Accessing scale setup data Entering scale setup data

Service Manual 21203788C Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Technical data Overview of weighing cells an preloads Geographical table

Software

Software architecture Error messages Temperature compensation data

Repair of Viper scales

Repairs and replacement of components

Viper terminals

Exploded view drawings Spare parts lists Upgrade kits

Repair of Viper terminals

Repairs and replacement of components

Contents Page

1 How to use this service manual ........................................................................................................ 1-2

1.1 General ............................................................................................................................................ 1-2

1.2 Layout of the service manual .............................................................................................................. 1-2

1.3 Working with the service manual ........................................................................................................ 1-2

2 Service concept ............................................................................................................................... 1-3

3 Introducing the Viper scales product group ........................................................................................ 1-3

4 The Viper terminals .......................................................................................................................... 1-3

5 Safety.............................................................................................................................................. 1-4

6 Environmental protection .................................................................................................................. 1-4

Section 1

General

1-2 09/03 Service Manual 21203788C

Section 1 General Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1 How to use this service manual

1.1 General

This service manual contains instructions for the repair and maintenance work to be performed by service engineers. It is assumed that the reader is familiar with the operation of the scales and terminals, and can refer to the relevant operating

instructions when necessary.

1.2 Layout of the service manual

This manual comprises nine main sections:

• General: Section 1gives instructions on using the service manual, and also provides an overview of the Viper scales and

terminals covered by it.

• Viper scales with small platform: Section 2 contains the exploded view drawings and spare parts lists for Viper scales with

the small platform.

• Viper scales with large platform: Section 3 contains the exploded view drawings and spare parts lists for Viper scales with

the large platform.

• Viper terminals: Section 4 contains the exploded view drawings and spare parts lists for Viper terminals, as well as a list of

available upgrade kits.

• Repair of Viper scales: Section 5 describes all repair work and the replacement of components for Viper scales with large

and small platforms.

• Repair of Viper terminals: Section 6 describes all repair work and the replacement of components for Viper terminals.

• Technician setup: Section 7 describes how to enter scale data, calibrate the weighing system and use the diagnostic

functions.

• Miscellaneous information: Section 8 contains technical information on the Viper product group, plus an overview of all

load cells and preloads and a table of geographical adjustment values. In addition you will find instructions on connecting weighing platforms to Viper terminals and information on appropriate load cells, as well as important information on attaching a second weighing platform the the optional analog interface of Viper scales and terminals.

• Software: Section 9 contains information on the various software versions. It also describes typical error messages that can

appear following service work and provides troubleshooting instructions.

1.3 Working with the service manual

The section number and title are printed in the header of every page in the service manual. Each footer shows the order number for the manual, the date issued and the page number.

The pages are numbered in the footer. First comes the section number, then a hyphen followed by the page number, starting with 1 in every section.

The exploded view drawings are provided as a guide for disassembly and assembly work and for identifying the order numbers for spare parts.

When ordering spare parts, please use the information given in the spare parts lists. The item numbers in the first column correspond to those on the exploded view drawing opposite.

Service Manual 21203788C 09/03 1-3

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 1 General

2 Service concept

The scales have been designed so that defective components can be replaced with just a few simple tools. The LC-PT45 printer for service is not required, as almost all parameters can be configured with the keyboard of the scale (in special cases temperature compensation data of the MonoBloc load cell may need to be entered using a computer). As you can see, we have kept it simple for efficient servicing.

3 Introducing the Viper scales product group

The Viper scales product group comprises the following models, which are all covered by this manual:

Viper M scales

Viper M scales possess basic weighing functions for simple weighing duties. Special versions of these scales are also available (Viper EX M and Viper EX M MB) for use in explosion hazard zones (Class 1, Division 1) with the PSUx power supply unit or the PSU power supply unit/interface.

Viper L scales

In addition to basic weighing functions, Viper L counting scales also have built-in functions for piece counting. An extended keypad and a display with a visual weighing-in aid are available in order to use these additional functions.

Viper D scales

Viper D scales are counting scales providing an additional numeric keypad and ID functions.

Viper T scales

Viper T scales are the top-of-the-range models in the product group. These counting scales support a wide array of useful functions. They have a dot matrix display with graphics capability and a numeric keypad. The various menu functions are controlled by soft keys in the display, i.e. context-sensitive screen buttons which change according to the momentary status of the menu. This scale type is also available for applications other than piece counting (such as SQC 16 and Remote).

Common features

Apart from the differences with regard to functions and operating and display elements, all models in the Viper product group have the following common features:

– Depending on the weighing range, some models are only available with the small platform, some only with the large platform

and some with both. The essential difference between the two platform sizes is in their external dimensions and the type of load cell used.

– All models are designed either for direct connection to the AC power line or contain a built-in rechargeable battery. Recharge-

able battery scales are connected to the AC power line via an AC adapter. Viper EX scales are powered by an external AC

adapter. – All models are certifiable. – The load cells are either of the strain gauge or MonoBloc type.

4 The Viper terminals

In terms of functionality and features the Viper RM, RL, RD and RT terminals exactly match the respective scale models (M, L, D and T, see above). Using appropriate weighing platforms the Viper terminals allow to build customized weighing systems.

1-4 09/03 Service Manual 21203788C

Section 1 General Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

5 Safety

When carrying out service or repair work, always observe the following:

• Before opening the scale or terminal, isolate it from the AC power line (pull out the plug).

• The scales and terminals contain precision electronic components that are sensitive to electrostatic discharge. We recommend that you wear a grounding wrist strap when doing any work in the interior of the scale or terminal, in order to prevent any electrostatic charge building up. Grounding wrist straps are commercially available from electronic component suppliers.

• Servicing work in explosion hazard zones is strictly prohibited. Ignition power could inadvertently be generated, causing an explosion. Servicing work should therefore only be undertaken in secure areas. Please also observe all special instructions in this Service Manual relating to work on Viper scales that are approved for use in potentially explosive environments. Such instructions are indicated by the adjacent symbol.

6 Environmental protection

Disposal of rechargeable batteries

Some models in the Viper product group have a built-in rechargeable battery. This contains heavy metals which could be hazardous to the environment. The battery is therefore classified as a hazardous waste, which must not be disposed of as normal domestic refuse. Please ensure that used batteries are disposed of correctly in accordance with the relevant local regulations.

Disposal of electronic components

Dispose of defective components in strict compliance with all local and national regulations! In many countries electronic components are classified as hazardous waste for whose disposal there are special regulations. In some countries electronic components are collected separately for recycling. If necessary, find out the applicable regulations from the local authorities!

Contents Page

1 Scales ............................................................................................................................................. 2-2

1.1 Scales with strain gauge load cells (not including Ex version) ................................................................ 2-2

1.2 Scales with strain gauge load cells and IP65 protection......................................................................... 2-8

1.3 Scales with strain gauge load cells, Ex version ..................................................................................... 2-12

1.4 Scales with MonoBloc load cells (not including Ex version) ................................................................... 2-16

1.5 Scales with MonoBloc load cells, Ex version ........................................................................................ 2-20

2 Display units.................................................................................................................................... 2-24

2.1 Viper M display unit (not including Ex version) ..................................................................................... 2-24

2.2 Viper EX M display unit ...................................................................................................................... 2-26

2.3 Viper L display unit ............................................................................................................................ 2-28

2.4 Viper D display unit ........................................................................................................................... 2-30

2.5 Viper T display unit ............................................................................................................................ 2-32

3 Fasteners set ................................................................................................................................... 2-34

Repair: see Section 5

Section 2

Viper scales with small platform

2-2 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1 Scales

1.1 Scales with strain gauge load cells (not including Ex version)

2

3

4

1

6

7

5

8

Service Manual 21203788C 09/03 2-3

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 platter 7.9" x 9.5" (200 x 240mm) 21203071 2 4 rubber cushion (1 piece)

1)

21203073 3 2 countersunk Torx screw M6 x 30 * 4 1 pan support plate 7.9" x 9.5" (200 x 240mm) – 5 1 housing, VIPER with small platform – 6 1 keypad overlay Chapter 2 7 1 mounting plate and display unit (digital PCB with LCD and back-light unit) Chapter 2 8 2 EMC clamp 21203480

* included in the fasteners set (chapter 3) – not available as spare part

1)

New rubber cushions have a hole in the surface to assist with assembly. A pin can be used to insert the cushion into the corresponding drilled hole in the pan support plate. Earlier rubber cushions did not have this assembly aid.

2-4 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with strain gauge load cells (continued)

11

1

2

5

4

6

8

9

10

16

12

13

14

17

18

3

7

19c

19d

19a

19b

19

15

25

22

23

24

14

26

27

20 21

20

14

21

26

27

Optional analog interface

Service Manual 21203788C 09/03 2-5

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 4 adjustable foot ∅ 1.7" (44mm)/ M10 x 0.75mm 21203109 2 6 countersunk Torx screw M4 x 10 * 3 1 bottom plate for small platform model – 4 4 button head Torx screw M4 x 12 * 5 4 wide flange washer 4.3 x 20 * 6 4 overload spring ** 7 1 overload stop adjustment screw (with certain production series only) ** 8 2 countersunk Torx screw M6 x 16 * 9 1 overload plate for small platform model –

10 1 load cell with cable (certifiable)

(Note: only “LC...” load cells are available as spare parts!) Weighing range 7.5lb (3kg):

C5MRS or (21203143) LC0765-5-MRV 21203873

Weighing range 12lb (6kg): C10MRS or (21203144)

LC0765-10-MRV 21203874 Weighing range 24lb (12kg):

C20MRS or (21203145) LC0765-20-MRV 21203875

11 1 bench AC adapter:

US version, internal (always order together with item 16) 21203122 US version for scales with rechargeable battery and Viper T scales 21255102

12 2 spring clip * 21203166 13 1 analog PCB Viper DMS 21203092 14 1 RS cable 18.1" (460mm) 21203168 15 1 A/D cable 4.3" (110 mm) for small platform model 21203164 16 1 adhesive patch for AC adapter or battery 21203184 17 1 RS connector plate for Viper M/L/D (various types, depending on the equipment) – 18 4 raised cheese head Torx screw M4 x 6 * 19 For scales with rechargeable battery only:

19a 1 rechargeable battery 12V/2,2Ah (always order together with item 16) 21203232 19b 1 battery cable (charging PCB – battery) 21203231 19c 1 charging circuit print 21204033 19d 1 connection cable (charging PCB – analog PCB) 21203233

2-6 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with strain gauge load cells (continued)

11

1

2

5

4

6

8

9

10

16

12

13

14

17

18

3

7

19c

19d

19a

19b

19

15

25

22

23

24

14

26

27

20 21

20

14

21

26

27

Optional analog interface

Service Manual 21203788C 09/03 2-7

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

20 1 PCB RS option (2 x RS232C), standard with Viper T 21203476 21 1 connection cable RS option 15" (380mm) 21203490 22 1 PCB optional analog interface 21203383 23 1 EPROM with interface software (for optional analog interface)

EPROM for Viper L and D analog interface 21203915

EPROM for Viper T analog interface 21255318 24 1 connection cable for optional analog interface 9.9" (250mm) 21203604 25 1 level bubble 21203204 26 1 PS2 cable 18.1"/460mm, (keyboard connection, for Viper T only) 21204107 27 1 connector plate Viper T for 3 RS interfaces and 1 keyboard cable: –

standard scale: 1x PCB RS Option, 1x RS cable 18.1", 1x PS2 cable

scale with optional analog interface: 3x RS cable 18.1", 1x PS2 cable

* included in the fasteners set (chapter 3) ** see section 4 “Replacing the load cell” – not available as spare part

2-8 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.2 Scales with strain gauge load cells and IP65 protection

1

2

3

4

5

6

7

8

9

Service Manual 21203788C 09/03 2-9

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 packing for cover plate 21203235 2 1 cover plate – 3 2 countersunk Torx screw M3 x 8 * 4 1 flange D = 100mm – 5 1 diaphragm 21203077 6 1 flange D = 58mm – 7 3 countersunk Torx screw M3 x 10 * 8 4 countersunk Torx screw M3 x 8 * 9 2 EMC clamp 21203480

* included in the fasteners set (chapter 3) – not available as spare part

Note: Parts of the scale not numbered in the illustration are included in the normal version (chapter 1.1).

2-10 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with strain gauge load cells and IP65 protection (continued)

6

2

1

7

6

3

5

4

8

10

9

8

10

9

11

Service Manual 21203788C 09/03 2-11

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 bottom plate for small platform model IP65 version 21203511 2 1 RS connector plate IP65 version (various types, depending on the equipment) – 3 1 air supply/extraction filter 21203860 4 1 packing for RS connector plate 21203236 5 6 raised cheese head Torx screw M4 x 6 * 6 1 RS cable 460mm IP65 21203717 7 1 PCB RS option (2 x RS232C) IP65 21255081 8 1 pressure equalizer 21203611

9 1 pressure equalizer tube LA 21203862 10 1 adhesive patch for pressure equalizer 21203184 11 1 level bubble 21203204

* included in the fasteners set (chapter 3) – not available as spare part

Note: Parts of the scale not numbered in the illustration are included in the normal version (chapter 1.1).

2-12 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.3 Scales with strain gauge load cells, Ex version

2

3

4

1

6

7

5

8

Service Manual 21203788C 09/03 2-13

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 platter 7.9" x 9.5" (200 x 240mm) 21203071

2 4 rubber cushion (1 piece)

1)

21203073 3 2 countersunk Torx screw M6 x 30 * 4 1 pan support plate 7.9" x 9.5" (200 x 240mm) – 5 1 housing, VIPER with small platform – 6 1 keypad overlay Chapter 2 7 1 mounting plate and display unit (digital PCB with LCD and back-light unit) Chapter 2 8 2 EMC clamp 21203480

* included in the fasteners set (chapter 3) – not available as spare part

1)

New rubber cushions have a hole in the surface to assist with assembly. A pin can be used to insert the cushion into the corresponding drilled hole in the pan support plate. Earlier rubber cushions did not have this assembly aid.

2-14 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with strain gauge load cells, Ex version (continued)

1

2

5

4

6

8

9

10

3

7

20

14

19

17

12

13

16

15

11

18

Service Manual 21203788C 09/03 2-15

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 4 adjustable foot ∅ 1.7" (44mm)/ M10 x 0.75mm 21203109 2 6 countersunk Torx screw M4 x 10 * 3 1 bottom plate for small platform model – 4 4 button head Torx screw M4 x 12 * 5 4 wide flange washer 4.3 x 20 * 6 4 overload spring ** 7 1 overload stop adjustment screw (with certain production series only) ** 8 2 countersunk Torx screw M6 x 16 * 9 1 overload plate for small platform model –

10 1 load cell with cable (certifiable)

Weighing range 7.5lb (3kg): LC0765-5-MRV 21203873

Weighing range 12lb (6kg): LC0765-10-MRV 21203874

Weighing range 24lb (12kg):

LC0765-20-MRV 21203875 11 1 wire harness Ex 21203732 12 2 spring clip * 21203166 13 1 analog PCB Viper Ex DMS 21203577 14 1 grounding screw EX 21050066 15 1 A/D cable 4.3" (110 mm) for small platform model 21203164 16 1 connection cable Ex 4 pins 21203852 17 1 connector plate Ex – 18 4 raised cheese head Torx screw M4 x 6 * 19 2 raised cheese head Torx screw M4 x 8 with tooth lock washer – 20 1 level bubble 21203204

* included in the fasteners set (chapter 3) ** see section 4 “Replacing the load cell” – not available as spare part

2-16 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.4 Scales with MonoBloc load cells (not including Ex version)

7

8

3

1

2

4

5

6

9

9a

9b

9c

10

Service Manual 21203788C 09/03 2-17

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 platter 7.9" x 9.5" (200 x 240mm) for 12lb scale (6kg) 21203071 2 4 pan mount (rubber cushion) 21203238 3 1 hexagon screw for load plate support – 4 1 fastener spring – 5 1 load plate support 7.9" x 9.5" (200 x 240mm) – 6 1 housing VIPER with small platform – 7 1 keypad overlay Chapter 2 8 1 mounting plate and display unit (digital PCB and display compl.) Chapter 2 9 For 6lb (3kg) model only:

9a 1 draft shield and screen 21203849 9b 1 platter 6.5" x 6.5" (165 x 165mm) 00225158

9c 1 load plate support 16.5" x 6.5" (165 x 165mm) –

10 2 EMC clamp 21203480

* included in the fasteners set (chapter 3) – not available as spare part

2-18 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with MonoBloc load cells (continued)

8

1

2

5

4

13

9

10

11

14

15

12

3

16c

16d

16a

16b

16

6

7

19

17

18

17

11

18

20

21

Service Manual 21203788C 09/03 2-19

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 4 adjustable foot ∅ 1.7" (44mm)/ M10 x 0.75mm 21203109 2 6 countersunk Torx screw M4 x 10 * 3 1 bottom plate for small platform model – 4 4 cylinder head Torx screw M4 x 12 * 5 4 flange washer 4.3 x 9 – 61 weighing modules (load cell and analog PCB):

weighing module 3002 for 6lb scale (3kg) 11102685

weighing module 6001 for 12lb scale (6kg) 11102686

7 1 cell cable MB SM with ferrite ring 21203289 81 bench AC adapter:

US version, internal (always order together with item 13) 21203122

US version for scales with rechargeable battery and Viper T scales 21255102

9 2 spring clip * 21203166 10 1 analog PCB Viper MonoBloc 21203100 11 1 RS cable 18.1" (460mm) 21203168 12 1 A/D cable 4.3" (110 mm), for small platform model 21203164 13 1 adhesive strip for AC adapter or battery 21203184 14 1 RS connector plate for Viper M/L/D (various types, depending on the equipment) – 15 4 raised cheese head Torx screw M4 x 6 * 16 For scales with rechargeable battery only:

16a 1 rechargeable battery 12V/2,2Ah (always order together with item 13) 21203232 16b 1 battery cable (charging PCB – battery) 21203231 16c 1 charging circuit print 21204033 16d 1 connection cable (charging PCB – analog PCB) 21203233

17 1 PCB RS option (2 x RS232C), standard with Viper T 21203476 18 1 connection cable RS option 15" (380mm) 21203490 19 1 level bubble 11101335 20 1 PS2 cable 18.1"/460mm, (keyboard connection, for Viper T only) 21204107 21 1 connector plate Viper T for 3 RS interfaces and 1 keyboard cable –

(1x PCB RS Option, 1x RS cable 18.1", 1x PS2 cable)

* included in the fasteners set (chapter 3) – not available as spare part

2-20 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.5 Scales with MonoBloc load cells, Ex version

7

8

3

1

2

4

5

6

9

9a

9b

9c

10

Service Manual 21203788C 09/03 2-21

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 platter 7.9" x 9.5" (200 x 240mm) for 12lb scale (6kg) 21203071

2 4 pan mount (rubber cushion) 21203238

3 1 hexagon screw for load plate support –

4 1 fastener spring –

5 1 load plate support 7.9" x 9.5" (200 x 240mm) –

6 1 housing VIPER with small platform –

7 1 keypad overlay Chapter 2

8 1 mounting plate and display unit (digital PCB and display compl.) Chapter 2

9 For 6lb (3kg) model only: 9a 1 draft shield and screen 21203849 9b 1 platter 6.5" x 6.5" (165 x 165mm) 00225158

9c 1 load plate support 16.5" x 6.5" (165 x 165mm) –

10 2 EMC clamp 21203480

* included in the fasteners set (chapter 3) – not available as spare part

2-22 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with MonoBloc load cells, Ex version (continued)

1

2

5

4

3

6

17

9

7

13

10

12

8

11

16

14

13

15

Service Manual 21203788C 09/03 2-23

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 4 adjustable foot ∅ 1.7" (44mm)/ M10 x 0.75mm 21203109

2 6 countersunk Torx screw M4 x 10 *

3 1 bottom plate for small platform model –

4 4 cylinder head Torx screw M4 x 12 *

5 4 flange washer 4.3 x 9 –

61 weighing modules (load cell and analog PCB):

weighing module 3002 Ex for 6lb scale (3kg) 21204011

weighing module 6001 Ex for 12lb scale (6kg) 21204012 7 1 cell PCB cable Ex 21203990 8 1 wire harness Ex 21203732 9 2 spring clip * 21203166

10 1 analog PCB Viper Ex MonoBloc 21203576 11 1 grounding screw EX 21050066 12 1 A/D cable 4.3" (110 mm), for small platform model 21203164 13 2 connection cable Ex 4 pins, for small platform model 21203852 14 1 connector plate Ex – 15 4 raised cheese head Torx screw M4 x 6 * 16 2 raised cheese head Torx screw M4 x 8 with tooth lock washer – 17 1 level bubble 11101335

* included in the fasteners set (chapter 3) – not available as spare part

2-24 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2 Display units

2.1 Viper M display unit (not including Ex version)

1

2

3

4

5

7

6

Service Manual 21203788C 09/03 2-25

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 keypad overlay for Viper M small platform model 21203440 2 1 display mounting plate for Viper M (always order together with item 1) 21203120 3 1 LCD for Viper M 21203134 4 1 back-light unit for Viper M 21203136 51 digital PCB Viper M

1)

VIPER DIG M digital PCB for scales with strain gauge load cell

2)

21203098

VIPER MB DIG digital PCB with FLASH Memory chip (soldered)

for scales with MonoBloc load cell

3)

21204025-MBM 6 1 EPROM with scale program for Viper M scales with strain gauge load cell 21203583 7 1 retaining screw *

* included in the fasteners set (chapter 3)

1)

without LCD and back-light unit (these parts must be ordered separately)

2)

without EPROM (must be ordered separately)

3)

the digital PCB with FLASH memory chip is always supplied with scale-specific software. The designation “MBM” following the order number specifies the scale software that is is loaded into the FLASH Memory chip prior to shipping.

2-26 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2.2 Viper EX M display unit

1

2

3

4

5

7

6

8

Service Manual 21203788C 09/03 2-27

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 keypad overlay for Viper M small platform model 21203440 2 1 display mounting plate for Viper Ex 21203734 3 1 LCD for Viper M 21203134 4 1 back-light unit for Viper M 21203136 5 1 VIPER Ex DIG digital PCB

1)

21203593

61 EPROM with scale program:

EPROM for Viper M scales with strain gauge load cell 21203583

EPROM for Viper M scales with MonoBloc load cell 21203584 7 1 retaining screw * 8 1 set of blank labels Viper Ex 22007836

* included in the fasteners set (chapter 3)

1)

supplied without software, LCD and back-light unit (these parts must be ordered separately)

2-28 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2.3 Viper L display unit

1

2

3

4

5

7

6

Service Manual 21203788C 09/03 2-29

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 keypad overlay for Viper L small platform model 21203441 2 1 display mounting plate for Viper L (always order together with item 1) 21203491 3 1 LCD for Viper L/D 21203687 4 1 back-light unit for Viper L/D 21203137 51 digital PCB Viper L

1)

VIPER DIG L digital PCB for scales with strain gauge load cell

2)

21203097

VIPER MB DIG digital PCB with FLASH Memory chip (soldered)

for scales with MonoBloc load cell

3)

21204025-MBL 6 1 EPROM with scale program for Viper L scales with strain gauge load cell 21203588 7 1 retaining screw *

* included in the fasteners set (chapter 3)

1)

without LCD and back-light unit (these parts must be ordered separately)

2)

without EPROM (must be ordered separately)

3)

the digital PCB with FLASH memory chip is always supplied with scale-specific software. The designation “MBL” following the order number specifies the scale software that is is loaded into the FLASH Memory chip prior to shipping.

2-30 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2.4 Viper D display unit

1

2

4

5

6

7

3

Service Manual 21203788C 09/03 2-31

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 keypad overlay for Viper D small platform model 21203442 2 1 display mounting plate for Viper D (always order together with items 1 and 3) 21203448 3 1 pressure sensitive membrane for numeric keypad (15 keys)

1)

21203439 4 1 LCD for Viper L/D 21203687 5 1 back-light unit for Viper L/D 21203137 61 digital PCB Viper D with FLASH Memory chip (soldered)

2)

VIPER DIG D digital PCB for scales with strain gauge load cell

3)

21203524-STD

VIPER DIG D digital PCB for scales with MonoBloc load cell

3)

21203524-MBD

7 1 retaining screw *

* included in the fasteners set (chapter 3)

1)

always order together with item 1

2)

supplied without LCD and back-light unit (these parts must be ordered separately)

3)

the digital PCB with FLASH memory chip is always supplied with scale-specific software. The designations “STD” and “MBD” following the order number specify the scale software that is is loaded into the FLASH Memory chip prior to shipping.

2-32 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2.5 Viper T display unit

1

2

3

4

7

5

6

7

Service Manual 21203788C 09/03 2-33

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 2 Viper scales with small platform

Item Quantity Description Order No.

1 1 keypad overlay for Viper T small platform model 21203129 2 1 pressure sensitive keypad membrane for numeric keypad (25 keys) 21203501 3 1 display mounting plate for Viper T (always order together with items 1 and 2) 21203507 4 1 spacer plate 21255046 5 1 LCD module 240 x 64 dots CCFL 21203515 61 digital PCB:

Viper T (counting scale) 21203996 SQC 16 21203772

Smart Remote 21203997

7 5 retaining screw *

* included in the fasteners set (chapter 3)

2-34 09/03 Service Manual 21203788C

Section 2 Viper scales with small platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

3 Fasteners set

The fasteners set comprises all the standard components (screws and washers) required for service work on Viper scales and terminals, plus the spring clips that hold the analog PCB in place.

Quantity Description Order No.

1 fasteners set: 21203404

20 countersunk Torx screw M3 x 8 – 20 countersunk Torx screw M3 x 10 – 20 countersunk Torx screw M6 x 30 – 50 countersunk Torx screw M4 x 10 – 10 countersunk Torx screw M4 x 12 – 20 button head Torx screw M3 x 6 – 30 button head Torx screw M4 x 12 – 30 button head Torx screw M5 x 12 – 20 wide flange washer 4.3 x 20 – 20 wide flange washer 5.3 x 20 – 20 countersunk Torx screw M6 x 16 – 20 spring clip – 50 raised cheese head Torx screw M4 x 6 – 10 screw lock – 10 Torx oval head tapping screw 2.9 x 13 –

Contents Page

1 Scales ............................................................................................................................................. 3-2

1.1 Scales with strain gauge load cells (not including Ex version) ................................................................ 3-2

1.2 Scales with strain gauge load cell and IP65 protection .......................................................................... 3-8

1.3 Scales with strain gauge load cells, Ex version ..................................................................................... 3-12

1.4 Scales with MonoBloc load cells (not including Ex version) ................................................................... 3-16

1.5 Scales with MonoBloc load cells, Ex version ........................................................................................ 3-20

2 Display units.................................................................................................................................... 3-24

2.1 Viper M display unit (not including Ex version) ..................................................................................... 3-24

2.2 Viper EX M display unit ...................................................................................................................... 3-26

2.3 Viper L display unit ............................................................................................................................ 3-28

2.4 Viper D display unit ........................................................................................................................... 3-30

2.5 Viper T display unit ............................................................................................................................ 3-32

3 Fasteners set ................................................................................................................................... 3-34

Repair: see Section 5

Section 3

Viper scales with large platform

3-2 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1 Scales

1.1 Scales with strain gauge load cells (not including Ex version)

2

3

4

1

6

7

5

8

Service Manual 21203788C 09/03 3-3

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 platter 9.5" x 13.8" (240 x 350mm) 21203072 2 4 rubber cushion (1 piece)

1)

21203073 3 2 countersunk Torx screw M6 x 30 * 4 1 pan support plate 9.5" x 13.8" (240 x 350mm) 21203075 5 1 housing, VIPER with large platform – 6 1 keypad overlay Subsection 2 7 1 mounting plate and display unit (digital PCB with LCD and back-light unit) Subsection 2 8 2 EMC clamp 21203480

* included in the fasteners set (chapter 3) – not available as spare part

1)

New rubber cushions have a hole in the surface to assist with assembly. A pin can be used to insert the cushion into the corresponding drilled hole in the pan support plate. Earlier rubber cushions did not have this assembly aid.

3-4 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with strain gauge load cells (continued)

11

1

2

3

5

4

8

9

16

13

14

17

18

10

6

19c

19d

19a

19b

19

7

12

15

25

22

23

24

14

26

27

20 21

20

14

21

26

27

Optional analog interface

Service Manual 21203788C 09/03 3-5

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 4 adjustable foot ∅ 2.2" (55mm)/M10 x 0.75mm 21203110 2 11 countersunk Torx screw M4 x 10 * 3 1 bottom plate for large platform model – 4 4 button head Torx screw M5 x 12 * 5 4 wide flange washer 5.3 x 20 * 6 4 overload spring ** 7 1 overload stop adjustment screw (with specific production series only) ** 8 2 countersunk Torx screw M6 x 16 * 9 1 overload plate for large platform model –

10 1 load cell with cable (certifiable)

(Note: only “LC...” load cells are available as spare parts!) Weighing range 24lb (12kg):

C20MRL or (21203151) LC0785-20-MRV 21203885

Weighing range 75lb (30kg): C50MRL or (21203152)

LC0785-50-MRV 21203886 Weighing range 120lb (60kg):

C100MRL or (21203153) LC0785-100-MRV 21203887

11 1 bench AC adapter:

US version, internal (always order together with item 16) 21203122 US version for scales with rechargeable battery and Viper T scales 21255102

12 2 spring clip * 21203166 13 1 analog PCB Viper DMS 21203092 14 1 RS cable 18.1" (460mm) 21203168

15 1 A/D cable 11.8" (300mm) for large platform model 21203167

16 1 adhesive patch for AC adapter or battery 21203184

17 1 RS connector plate for Viper M/L/D (various types, depending on the equipment) –

18 4 raised cheese head Torx screw M4 x 6 * 19 For scales with with rechargeable battery only:

19a 1 rechargeable battery 12V/2,2Ah (always order together with item 16) 21203232 19b 1 battery cable (charging PCB – battery) 21203231 19c 1 charging circuit print 21204033 19d 1 connection cable (charging PCB – analog PCB) 21203233

3-6 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with strain gauge load cells (continued)

11

1

2

3

5

4

8

9

16

13

14

17

18

10

6

19c

19d

19a

19b

19

7

12

15

25

22

23

24

14

26

27

20 21

20

14

21

26

27

Optional analog interface

Service Manual 21203788C 09/03 3-7

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

20 1 PCB RS option (2 x RS232C), standard with Viper T 21203476 21 1 connection cable RS option 15" (380mm) 21203490 22 1 PCB optional analog interface 21203383 23 1 EPROM with interface software (for optional analog interface)

EPROM for Viper L and D analog interface 21203915

EPROM for Viper T analog interface 21255318 24 1 connection cable for optional analog interface 9.9" (250mm) 21203604 25 1 level bubble 21203204 26 1 PS2 cable 18.1"/460mm, (keyboard connection, for Viper T only) 21204107 27 1 connector plate Viper T for 3 RS interfaces and 1 keyboard cable: –

standard scale: 1x PCB RS Option, 1x RS cable 18.1", 1x PS2 cable

scale with optional analog interface: 3x RS cable 18.1", 1x PS2 cable

* included in the fasteners set (chapter 3) ** see section 4 “Replacing the load cell” – not available as spare part

3-8 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.2 Scales with strain gauge load cell and IP65 protection

8

1

2

3

4

5

6

7

9

Service Manual 21203788C 09/03 3-9

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 packing for cover plate 21203235 2 1 cover plate – 3 2 countersunk Torx screw M3 x 8 * 4 1 flange D = 100mm – 5 1 diaphragm 21203077 6 1 flange D = 58mm – 7 3 countersunk Torx screw M3 x 10 * 8 4 countersunk Torx screw M3 x 8 * 9 2 EMC clamp 21203480

* included in the fasteners set (chapter 3) – not available as spare part

Note: Parts of the scale not numbered in the illustration are included in the normal version (chapter 1.1).

3-10 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with strain gauge load cells and IP65 protection (continued)

1

6

2

7

6

3

5

4

8

10

9

11

Service Manual 21203788C 09/03 3-11

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 bottom plate for large platform model IP65 version 21203512 2 1 RS connector plate IP65 version (various types, depending on the equipment) – 3 1 air supply/extraction filter 21203860 4 1 packing for RS connector plate 21203236 5 6 raised cheese head Torx screw M4 x 6 * 6 1 RS cable 460mm IP65 21203717 7 1 PCB RS option (2 x RS232C) IP65 21255081 8 1 pressure equalizer 21203611

9 1 pressure equalizer tube LA 21203862 10 1 adhesive patch for pressure equalizer 21203184 11 1 level bubble 21203204

* included in the fasteners set (chapter 3) – not available as spare part

Note: Parts of the scale not numbered in the illustration are included in the normal version (chapter 1.1).

3-12 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.3 Scales with strain gauge load cells, Ex version

2

3

4

1

6

7

5

8

Service Manual 21203788C 09/03 3-13

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 platter 9.5" x 13.8" (240 x 350mm) 21203072

2 4 rubber cushion (1 piece)

1)

21203073 3 2 countersunk Torx screw M6 x 30 * 4 1 pan support plate 9.5" x 13.8" (240 x 350mm) 21203075 5 1 housing, VIPER with large platform – 6 1 keypad overlay Subsection 2 7 1 mounting plate and display unit (digital PCB with LCD and back-light unit) Subsection 2 8 2 EMC clamp 21203480

* included in the fasteners set (chapter 3) – not available as spare part

1)

New rubber cushions have a hole in the surface to assist with assembly. A pin can be used to insert the cushion into the corresponding drilled hole in the pan support plate. Earlier rubber cushions did not have this assembly aid.

3-14 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with strain gauge load cells, Ex version (continued)

1

2

3

5

4

8

9

10

6

7

20

13

16

15

11

14

19

17

12

18

Service Manual 21203788C 09/03 3-15

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 4 adjustable foot ∅ 2.2" (55mm)/M10 x 0.75mm 21203110 2 11 countersunk Torx screw M4 x 10 * 3 1 bottom plate for large platform model – 4 4 button head Torx screw M5 x 12 * 5 4 wide flange washer 5.3 x 20 * 6 4 overload spring ** 7 1 overload stop adjustment screw (with specific production series only) ** 8 2 countersunk Torx screw M6 x 16 * 9 1 overload plate for large platform model –

10 1 load cell with cable (certifiable)

Weighing range 24lb (12kg): LC0785-20-MRV 21203885

Weighing range 75lb (30kg): LC0785-50-MRV 21203886

Weighing range 120lb (60kg):

LC0785-100-MRV 21203887 11 1 wire harness Ex 21203732 12 2 spring clip * 21203166 13 1 analog PCB Viper Ex DMS 21203577 14 1 grounding screw EX 21050066

15 1 A/D cable 11.8" (300mm) for large platform model 21203167

16 1 connection cable Ex 4 pins, for large platform model 21203733

17 1 connector plate Ex –

18 4 raised cheese head Torx screw M4 x 6 * 19 2 raised cheese head Torx screw M4 x 8 with tooth lock washer – 20 1 level bubble 21203204

* included in the fasteners set (chapter 3) ** see section 4 “Replacing the load cell” – not available as spare part

3-16 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.4 Scales with MonoBloc load cells (not including Ex version)

2

3

4

1

6

7

5

8

Service Manual 21203788C 09/03 3-17

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 platter 9.5" x 13.8" (240 x 350mm) 21203072 2 4 pan mount (rubber cushion) 21203238 3 2 countersunk screw M6 x 30 * 4 1 load plate support 9.5" x 13.8" (240 x 350mm) – 5 1 housing VIPER with large platform – 6 1 keypad overlay Chapter 2 7 1 mounting plate and display unit (digital PCB and display compl.) Chapter 2 8 2 EMC clamp 21203480

* included in the fasteners set (chapter 3) – not available as spare part

3-18 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with MonoBloc load cells (continued)

10

1

2

3

5

4

15

12

13

16

17

6 7

8

18c

18d

18a

18b

18

9

11

14

21

19 20

19

13

20

22

23

Service Manual 21203788C 09/03 3-19

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 4 adjustable foot ∅ 2.2" (55mm)/M10 x 0.75mm 21203110 2 11 countersunk Torx screw M4 x 10 * 3 1 bottom plate for large platform model – 4 8 cylinder head Torx screw M5 x 12 * 5 1 overload plate – 6 1 overload stop: adjustment screw – 7 1 overload stop: arrestment screw – 81 weighing modules (load cell and analog PCB):

weighing module 32001 for 24lb and 75lb scales (12kg and 30kg) 11102687

9 1 cell cable MB-LA with ferrite ring 21203290

10 1 bench AC adapter:

US version, internal (always order together with item 15) 21203122

US version for scales with rechargeable battery and Viper T scales 21255102 11 2 spring clip * 21203166 12 1 analog PCB Viper MonoBloc 21203100 13 1 RS cable 18.1" (460mm) 21203168

14 1 A/D cable 11.8" (300mm), for large platform model 21203167

15 1 adhesive patch for AC adapter or battery 21203184

16 1 RS connector plate for Viper M/L/D (various types, depending on the equipment) –

17 4 raised cheese head Torx screw M4 x 6 * 18 For scales with rechargeable battery only:

18a 1 rechargeable battery 12V/2,2Ah (always order together with item 15) 21203232 18b 1 battery cable (charging PCB – battery) 21203231 18c 1 charging circuit print 21204033 18d 1 connection cable (charging PCB – analog PCB) 21203233

19 1 PCB RS option (2 x RS232C), standard with Viper T 21203476 20 1 connection cable RS option 15" (380mm) 21203490 21 1 level bubble 11101335 22 1 PS2 cable 18.1"/460mm, (keyboard connection, for Viper T only) 21204107 23 1 connector plate Viper T for 3 RS interfaces and 1 keyboard cable –

(1x PCB RS Option, 1x RS cable 18.1", 1x PS2 cable)

* included in the fasteners set (chapter 3) – not available as spare part

3-20 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.5 Scales with MonoBloc load cells, Ex version

2

3

4

1

6

7

5

8

Service Manual 21203788C 09/03 3-21

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 platter 9.5" x 13.8" (240 x 350mm) 21203072 2 4 pan mount (rubber cushion) 21203238 3 2 countersunk screw M6 x 30 * 4 1 load plate support 9.5" x 13.8" (240 x 350mm) – 5 1 housing VIPER with large platform – 6 1 keypad overlay Chapter 2 7 1 mounting plate and display unit (digital PCB and display compl.) Chapter 2 8 2 EMC clamp 21203480

* included in the fasteners set (chapter 3) – not available as spare part

3-22 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Scales with MonoBloc load cells, Ex version (continued)

1

2

3

5

4

6 7

8

19

12

9

11

15

18

16

10

14

13

17

Service Manual 21203788C 09/03 3-23

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 4 adjustable foot ∅ 2.2" (55mm)/M10 x 0.75mm 21203110 2 11 countersunk Torx screw M4 x 10 * 3 1 bottom plate for large platform model – 4 8 cylinder head Torx screw M5 x 12 * 5 1 overload plate – 6 1 overload stop: adjustment screw – 7 1 overload stop: arrestment screw – 81 weighing modules (load cell and analog PCB):

weighing module 32001 Ex for 24lb and 75lb scales (12kg and 30kg) 21204013

9 1 cell PCB cable Ex, for large platform model 21203851 10 1 wire harness Ex 21203732 11 2 spring clip * 21203166 12 1 analog PCB Viper Ex MonoBloc 21203576 13 2 connection cable Ex 4 pins, for large platform model 21203733

14 1 A/D cable 11.8" (300mm), for large platform model 21203167

15 1 grounding screw EX 21050066

16 1 connector plate Ex –

17 4 raised cheese head Torx screw M4 x 6 * 18 2 raised cheese head Torx screw M4 x 8 with tooth lock washer – 19 1 level bubble 11101335

* included in the fasteners set (chapter 3) – not available as spare part

3-24 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2 Display units

2.1 Viper M display unit (not including Ex version)

1

2

3

4

5

7

6

Service Manual 21203788C 09/03 3-25

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 keypad overlay for Viper M large platform model 21203443

2 1 display mounting plate for Viper M (always order together with item 1) 21203120

3 1 LCD for Viper M 21203134

4 1 back-light unit for Viper M 21203136

51 digital PCB Viper M

1)

VIPER DIG M digital PCB for scales with strain gauge load cell

2)

21203098

VIPER MB DIG digital PCB with FLASH Memory chip (soldered) for scales with MonoBloc load cell

3)

21204025-MBM 6 1 EPROM with scale program for Viper M scales with strain gauge load cell 21203583 7 1 retaining screw *

* included in the fasteners set (chapter 3)

1)

without LCD and back-light unit (these parts must be ordered separately)

2)

without EPROM (must be ordered separately)

3)

the digital PCB with FLASH memory chip is always supplied with scale-specific software. The designation “MBM” following the order number specifies the scale software that is is loaded into the FLASH Memory chip prior to shipping.

3-26 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2.2 Viper EX M display unit

1

2

3

4

5

7

6

8

Service Manual 21203788C 09/03 3-27

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 keypad overlay for Viper M large platform model 21203443 2 1 display mounting plate for Viper Ex 21203734 3 1 LCD for Viper M 21203134 4 1 back-light unit for Viper M 21203136 5 1 VIPER Ex DIG digital PCB

1)

21203593

61 EPROM with scale program:

EPROM for Viper M scales with strain gauge load cell 21203583

EPROM for Viper M scales with MonoBloc load cell 21203584 7 1 retaining screw * 8 1 set of blank labels Viper Ex 22007836

* included in the fasteners set (chapter 3)

1)

supplied without software, LCD and back-light unit (these parts must be ordered separately)

3-28 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2.3 Viper L display unit

1

2

3

4

5

7

6

Service Manual 21203788C 09/03 3-29

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 keypad overlay for Viper L large platform model 21203444 2 1 display mounting plate for Viper L (always order together with item 1) 21203491 3 1 LCD for Viper L/D 21203687 4 1 back-light unit for Viper L/D 21203137 51 digital PCB Viper L

1)

VIPER DIG L digital PCB for scales with strain gauge load cell

2)

21203097

VIPER MB DIG digital PCB with FLASH Memory chip (soldered)

for scales with MonoBloc load cell

3)

21204025-MBL 6 1 EPROM with scale program for Viper L scales with strain gauge load cell 21203588 7 1 retaining screw *

* included in the fasteners set (chapter 3)

1)

without LCD and back-light unit (these parts must be ordered separately)

2)

without EPROM (must be ordered separately)

3)

the digital PCB with FLASH memory chip is always supplied with scale-specific software. The designation “MBL” following the order number specifies the scale software that is is loaded into the FLASH Memory chip prior to shipping.

3-30 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2.4 Viper D display unit

1

2

4

5

6

7

3

Service Manual 21203788C 09/03 3-31

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 keypad overlay for Viper D large platform model 21203445 2 1 display mounting plate for Viper D (always order together with items 1 and 3) 21203448 3 1 pressure sensitive membrane for numeric keypad (15 keys)

1)

21203439 4 1 LCD for Viper L/D 21203687 5 1 back-light unit for Viper L/D 21203137 61 digital PCB Viper D with FLASH Memory chip (soldered)

2)

VIPER DIG D digital PCB for scales with strain gauge load cell

3)

21203524-STD

VIPER DIG D digital PCB for scales with MonoBloc load cell

3)

21203524-MBD

7 1 retaining screw *

* included in the fasteners set (chapter 3)

1)

always order together with item 1

2)

supplied without LCD and back-light unit (these parts must be ordered separately)

3)

the digital PCB with FLASH memory chip is always supplied with scale-specific software. The designations “STD” and “MBD” following the order number specify the scale software that is is loaded into the FLASH Memory chip prior to shipping.

3-32 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2.5 Viper T display unit

1

2

3

4

7

5

6

7

Service Manual 21203788C 09/03 3-33

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 3 Viper scales with large platform

Item Quantity Description Order No.

1 1 keypad overlay for Viper T large platform model 21203132 2 1 pressure sensitive keypad membrane for numeric keypad (25 keys) 21203501 3 1 display mounting plate for Viper T (always order together with items 1 and 2) 21203507 4 1 spacer plate 21255046 5 1 LCD module 240 x 64 dots CCFL 21203515 61 digital PCB:

Viper T (counting scale) 21203996 SQC 16 21203772

Smart Remote 21203997

7 5 retaining screw *

* included in the fasteners set (chapter 3)

3-34 09/03 Service Manual 21203788C

Section 3 Viper scales with large platform Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

3 Fasteners set

The fasteners set comprises all the standard components (screws and washers) required for service work on Viper scales and terminals, plus the spring clips that hold the analog PCB in place.

Quantity Description Order No.

1 fasteners set: 21203404

20 countersunk Torx screw M3 x 8 – 20 countersunk Torx screw M3 x 10 – 20 countersunk Torx screw M6 x 30 – 50 countersunk Torx screw M4 x 10 – 10 countersunk Torx screw M4 x 12 – 20 button head Torx screw M3 x 6 – 30 button head Torx screw M4 x 12 – 30 button head Torx screw M5 x 12 – 20 wide flange washer 4.3 x 20 – 20 wide flange washer 5.3 x 20 – 20 countersunk Torx screw M6 x 16 – 20 spring clip – 50 raised cheese head Torx screw M4 x 6 – 10 screw lock – 10 Torx oval head tapping screw 2.9 x 13 –

Repair: see section 6

Contents Page

1 Terminals: spare parts and exploded view drawings .......................................................................... 4-2

1.1 Viper RM terminal .............................................................................................................................. 4-2

1.2 Viper RL terminal ............................................................................................................................... 4-4

1.3 Viper RD terminal .............................................................................................................................. 4-6

1.4 Viper RT terminal ............................................................................................................................... 4-8

2 OptionPac ........................................................................................................................................ 4-12

3 Small parts set ................................................................................................................................ 4-14

4 Upgrade kits .................................................................................................................................... 4-15

4.1 Upgrade kits for Viper RM, RL and RD terminals .................................................................................... 4-15

4.1.1 “Analog Interface Option Viper RL/RD” upgrade kit ................................................................................. 4-15

4.1.2 “AccuPac Viper RM/RL/RD” upgrade kit ................................................................................................ 4-16

4.2 Upgrade kits for Viper RT terminal........................................................................................................ 4-17

4.2.1 “Analog Interface Option Viper RT” upgrade kit ...................................................................................... 4-17

4.2.2 “USB Interface Viper RT” upgrade kit .................................................................................................... 4-17

4.2.3 “Ethernet Interface Viper RT” upgrade kit ............................................................................................... 4-18

4.2.4 “AccuPac Viper RT” upgrade kit ........................................................................................................... 4-18

4.3 Certification set for Viper terminals and scales ...................................................................................... 4-18

Section 4

Viper terminals

4-2 09/03 Service Manual 21203788C

Section 4 Viper terminals Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1 Terminals: spare parts and exploded view drawings

1.1 Viper RM terminal

1

3

23

22

5

4

6

7

8

910

12

14

15

16

17

18

13

19

20

21

2

24

26

25

27b

27a

11

Service Manual 21203788C 09/03 4-3

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 4 Viper terminals

Item Quantity Designation Part no.

1 1 base plate with seal attached 21255118 2 4 rubber foot 00200068 3 8 countersunk screw M4 x 8 Torx T20 * 4 1 AC adapter 10W USA/Japan version 21255102 5 1 adhesive tape for AC adapter 21203184 6 1 seal for terminal rear panel 21255012 7 1 connector plate for 2 interfaces (RS232C/load cell) 22010041 8 1 countersunk screw M4 x 12 Torx T20 * 9 5 fillister head screw M4 x 8 Torx T20 *

10 1 RS232C interface IP65 with cable (soldered) 21203717 11 2 dust cover for interfaces 11101560 12 1 keypad overlay Viper RM 22010046 13 1 display mounting plate BC (always order together with item 12) 21255041 14 1 LC display SW 21203134 15 1 backlighting SW 21203136 16 1 digital board Viper DIG M 21203098 17 1 EPROM with software for Viper RM 21203583 18 2 Torx oval head tapping screw 2.9 x 13 * 19 1 analog board 7k 21255054 20 1 fastening clamp for analog board * 21203166 21 1 A/D cable 300 mm 21203167 22 1 EMC clamp short 21203480 23 1 EMC clamp long 21255047 24 4 screw lock * 25 1 EMC clamp for analog board 22007948 26 1 load cell connection cable with Sub D-socket and plug for analog board 22010055 27 – 9-pin Sub-D connector (for connecting the load cell to the terminal): ––––––

27a 1 Sub-D standard housing (dismantled) 22007870 27b 1 pin base 22007869

* Included in small parts set (section 3).

4-4 09/03 Service Manual 21203788C

Section 4 Viper terminals Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.2 Viper RL terminal

Option

Connector plate for optional analog interface

1

3

23

22

5

4

7

910

12

14

15

16

17

18

13

19

20

21

7a

8

2

24

25

6

26

9

8

24

26

10

27b

27a

11

Service Manual 21203788C 09/03 4-5

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 4 Viper terminals

Item Quantity Designation Part no.

1 1 base plate with seal attached 21255118 2 4 rubber foot 00200068 3 8 countersunk screw M4 x 8 Torx T20 * 4 1 AC adapter 10W USA/Japan version 21255102 5 1 adhesive tape for AC adapter 21203184 6 1 seal for terminal rear panel 21255012 71 standard: connector plate for 2 interfaces (RS232C/load cell) 22010041

7a 1 option: connector plate for 3 interfaces (RS232C/load cell/analog interface option) 22010043

8 1 countersunk screw M4 x 12 Torx T20 * 9 5 fillister head screw M4 x 8 Torx T20 *

10 1 RS232C interface IP65 with cable (soldered)

1)

21203717

11 2 dust cover for interfaces 11101560 12 1 keypad overlay Viper RL 22010047 13 1 display mounting plate RL (always order together with item 12) 22010038 14 1 LC display FC 21203687 15 1 backlighting BC/FC 21203137 16 1 digital board Viper DIG L 21203097 17 1 EPROM with software for Viper RL 21203588 18 2 Torx oval head tapping screw 2.9 x 13 * 19 1 analog board 7k 21255054 20 1 fastening clamp for analog board * 21203166 21 1 A/D cable 300 mm 21203167 22 1 EMC clamp short 21203480 23 1 EMC clamp long 21255047 24 4 screw lock * 25 1 EMC clamp for analog board 22007948 26 1 load cell connection cable with Sub D-socket and plug for analog board 22010055 27 – 9-pin Sub-D connector (for connecting the load cell to the terminal): ––––––

27a 1 Sub-D standard housing (dismantled) 22007870 27b 1 pin base 22007869

* Included in small parts set (section 3).

1)

If an analog interface option is built into the OptionPac (see chapter 2), a second cable of this type is used to connect the analog interface option board to the connector plate of the terminal (item 7a above).

4-6 09/03 Service Manual 21203788C

Section 4 Viper terminals Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.3 Viper RD terminal

Option

Connector plate for optional analog interface

1

3

23

22

5

4

12

15

16

17

18

14

19

20

21

13

2

25

7

910

8

24

6

26

27b

27a

7a

9

8

24

26

10

11

Service Manual 21203788C 09/03 4-7

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 4 Viper terminals

Item Quantity Designation Part no.

1 1 base plate with seal attached 21255118 2 4 rubber foot 00200068 3 8 countersunk screw M4 x 8 Torx T20 * 4 1 AC adapter 10W USA/Japan version 21255102 5 1 adhesive tape for AC adapter 21203184 6 1 seal for terminal rear panel 21255012 71 standard: connector plate for 2 interfaces (RS232C/load cell) 22010041

7a 1 option: connector plate for 3 interfaces (RS232C/load cell/analog interface option) 22010043

8 1 countersunk screw M4 x 12 Torx T20 * 9 5 fillister head screw M4 x 8 Torx T20 *

10 1 RS232C interface IP65 with cable (soldered)

1)

21203717

11 2 dust cover for interfaces 11101560 12 1 keypad overlay Viper RD 22010048 13 1 numeric membrane keypad (always order together with item 12) 21203439 14 1 display mounting plate RD (always order together with items 12 and 13) 22010039 15 1 LC display FC 21203687 16 1 backlighting BC/FC 21203137 17 1 digital board Viper DIG D (incl. soldered FLASH Memory chip with software) 21203524-STD 18 2 Torx oval head tapping screw 2.9 x 13 * 19 1 analog board 7k 21255054 20 1 fastening clamp for analog board * 21203166 21 1 A/D cable 300 mm 21203167 22 1 EMC clamp short 21203480 23 1 EMC clamp long 21255047 24 4 screw lock * 25 1 EMC clamp for analog board 22007948 26 1 load cell connection cable with Sub D-socket and plug for analog board 22010055 27 – 9-pin Sub-D connector (for connecting the load cell to the terminal): ––––––

27a 1 Sub-D standard housing (dismantled) 22007870 27b 1 pin base 22007869

* Included in small parts set (section 3).

1)

If an analog interface option is built into the OptionPac (see chapter 2), a second cable of this type is used to connect the analog interface option board to the connector plate of the terminal (item 7a above).

4-8 09/03 Service Manual 21203788C

Section 4 Viper terminals Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1.4 Viper RT terminal

1

3

5

4

26

27

29

18

2

28

6

9

8

16

31

7

17

11

12

10

13

32b

32a

9

8

16

31

7a

17

10

13

15 a

12

9

8

16

31

7

17

10

13

14 a

12

19

20

22

21

24

23

30

14 b

24

25

USB option Ethernet option

Service Manual 21203788C 09/03 4-9

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 4 Viper terminals

Item Quantity Designation Part no.

1 1 base plate with seal attached 21255118 2 4 rubber foot 00200068 3 8 countersunk screw M4 x 8 Torx T20 * 4 1 AC adapter 10W USA/Japan version 21255102 5 1 adhesive tape for AC adapter 21203184 6 1 seal for terminal rear panel 21255012 71 standard: connector plate for 3 x RS232C/PS2/load cell

1)

22010040

7a 1 option: connector plate for 2 x RS232C/Ethernet/PS2/load cell 22010042

8 1 countersunk screw M4 x 12 Torx T20 * 9 5 fillister head screw M4 x 8 Torx T20 *

Standard interfaces:

10 1 RS232C interface IP65 with cable (soldered)

2)

21203717

11 1 board with 2x RS232C IP65 (requires connecting cable item 12) 21255081 12 1 connecting cable for 2 RS interfaces 21203490 13 1 PS2 cable 18.1"/460mm (keyboard connection) 21204107 14 USB option (upgrade kit see chapter 4.2.2)

14a 1 board USB option (1 Sub-D socket for RS232C / 1 Sub-D connector for USB)

3)

21204114

14b 1 USB cable (with Sub-D and USB type B sockets) 21204031

15 1 Ethernet option (requires connector plate item 7a) (upgrade kit see chapter 4.2.3):

15a: 1 board Ethernet option (1x RS232C /1 x Ethernet RJ45)

3)

21204027

16 4 dust cover for interfaces 11101560 17 1 dust cover for PS2 interface 22010058 18 1 keypad overlay Viper RT 22010049 19 1 numeric keypad membrane (25 keys) (always order together with item 18) 21203501 20 1 display mounting plate RT/SC (always order together with items 18 and 19) 21255043 21 1 spacer plate 21255046 22 1 LCD module 240 x 64 dots CCFL 21203515 23 2 Torx oval head tapping screw 2.9 x 13 * 24 1 digital board Viper T/RT (incl. soldered FLASH Memory chip with software) 21203996 25 5 fillister head screw M3 x 6 Torx T10 * 26 1 analog board 7k 21255054 27 1 fastening clamp for analog board * 21203166 28 1 EMC clamp for analog board 22007948 29 1 A/D cable 300 mm 21203167

continues on next page

4-10 09/03 Service Manual 21203788C

Section 4 Viper terminals Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

Viper RT terminal (continued)

1

3

5

4

26

27

29

18

2

28

6

9

8

16

31

7

17

11

12

10

13

32b

32a

9

8

16

31

7a

17

10

13

15 a

12

9

8

16

31

7

17

10

13

14 a

12

19

20

22

21

24

23

30

14 b

24

25

USB option Ethernet option

Service Manual 21203788C 09/03 4-11

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 4 Viper terminals

30 8 screw lock * 31 1 load cell connection cable with Sub D-socket and plug for analog board

1)

22010055

32 – 9-pin Sub-D connector (for connecting the load cell to the terminal): ––––––

32a 1 Sub-D standard housing (dismantled) 22007870 32b 1 pin base 22007869

* Included in small parts set (section 3).

1)

Is also used with analog interface option and USB option.

2)

If an analog interface option is built into the OptionPac (see chapter 2), a second cable of this type is used to connect the analog interface option board to the connector plate of the terminal (item 7 above).

3)

replaces the standard interface board (2 x RS232C), part no. 21255081. The standard connecting cable (part no.

21203490) can be used with the optional interface board. However, if an analog interface option is present the “ETH/USB option” cable (part no. 22010154) must be used instead of the standard connecting cable (part no. 21203490). This cable is included in the respective upgrade kits (see chapters 4.2.2 and 4.2.3).

4-12 09/03 Service Manual 21203788C

Section 4 Viper terminals Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

2 OptionPac

1

3

7

8

9

10

11

12

17

16

15

14

4

5

13

6

2

18

19

Service Manual 21203788C 09/03 4-13

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 4 Viper terminals

Item Quantity Designation Part no.

1 1 base plate with seal attached 21255118 2 4 rubber foot 00200068 3 8 countersunk screw M4 x 8 Torx T20 * 4 4 fillister head screw M5 x 12 * 5 1 charging circuit board for battery 21255052 6 2 fastening clamp for charging circuit board * 21203166 7 1 connecting cable charging circuit – analog board 21203233 8 1 battery cable 21203231 9 1 battery 12V/2.2Ah (always order together with item 10) 21203232

10 2 adhesive tape for battery 21255260 11 1 seal for back panel OptionPac 21255013 12 1 back panel without openings 21255003 13 1 analog interface option board (Viper RL, RD and RT only) 21203383 14 4 tapping screw M3 x 6 (Viper RL, RD and RT only) 21050008 15 1 EPROM with interface software for analog interface (Viper RL, RD and RT only)

EPROM for Viper RL and RD analog interface 21203915

EPROM for Viper RT analog interface 21255318 16 1 cable for analog option (Viper RL, RD and RT only) 21203604 17 1 seal (between OptionPac and Terminal) 21255011 18 5 fillister head screw M4 x 8 Torx T20 * 19 1 countersunk screw M4 x 10 Torx T20 *

* Included in small parts set (section 3)

4-14 09/03 Service Manual 21203788C

Section 4 Viper terminals Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

3 Small parts set

The fasteners set comprises all the standard components (screws, washers. etc.) required for service work on Viper scales and terminals.

Quantity Description Order No.

1 fasteners set: 21203404

20 countersunk Torx screw M3 x 8 – 20 countersunk Torx screw M3 x 10 – 20 countersunk Torx screw M6 x 30 – 50 countersunk Torx screw M4 x 10 – 10 countersunk Torx screw M4 x 12 – 20 button head Torx screw M3 x 6 – 30 button head Torx screw M4 x 12 – 30 button head Torx screw M5 x 12 – 20 wide flange washer 4.3 x 20 – 20 wide flange washer 5.3 x 20 – 20 countersunk Torx screw M6 x 16 – 20 spring clip – 50 raised cheese head Torx screw M4 x 6 – 10 screw lock – 10 Torx oval head tapping screw 2.9 x 13 –

Service Manual 21203788C 09/03 4-15

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 4 Viper terminals

4 Upgrade kits

Installed Viper RL, RD and RT terminals can be subsequently upgraded with upgrade kits. The respective kits contain all the necessary parts.

4.1 Upgrade kits for Viper RM, RL and RD terminals

The following upgrade kits are exclusively designed for Viper RM, RL and RD terminals.

4.1.1 “Analog Interface Option Viper RL/RD” upgrade kit

This upgrade kit allows connection of a second, analog weighing platform to a Viper RL or RD terminal.

Quantity Designation Part no.

1 Upgrade kit “Analog Interface Option Viper RL/RD” comprising: 22010143

1 OptionPac cpl. 21255117 4 round head screw M5 x 12 Torx 22005232 5 round head screw M4 x 6 Torx 22003003 1 screw DIN7500 M4 x 10 Torx 22003002 1 back panel without openings 21255003 1 analog interface option board 21203383

EPROM with interface software RL/RD 21203915

1 cable for analog option 21203604 1 RS232C interface IP65 with cable (soldered) 21203717 4 tapping screw M3 x 6 21050008 1 connector plate for 3 interfaces (RS232C/load cell/analog interface option) 22010043 2 screw lock 21203570 1 Sub-D standard housing (dismantled) 22007870 1 pin base 22007869 1 dust cover for interfaces 11101560 1 flat ribbon cable clamp 21255122 1 type plate Viper Terminal (sticker) 22010059 1 additional plate (sticker with interface designation) 22010143

Drawings of spare parts see chapters 1 and 2.

4-16 09/03 Service Manual 21203788C

Section 4 Viper terminals Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

4.1.2 “AccuPac Viper RM/RL/RD” upgrade kit

This upgrade kit enables the Viper RM, RL and RD terminals to be operated without being connected to the power supply.

Quantity Designation Part no.

1 Upgrade kit “AccuPac” comprising: 2210144

1 OptionPac cpl. 21255117 4 round head screw M5 x 12 Torx 22005232 5 round head screw M4 x 6 Torx 22003003 1 screw DIN7500 M4 x 10 Torx 22003002 1 back panel without openings 21255003 1 battery cable 21203231 2 adhesive tape for battery 21255260 1 battery 12V/2.2Ah 21203232 1 connecting cable charging circuit – analog board 21203233 2 fastening clamp for charging circuit board 21203166 1 charging circuit board for battery 21255052 1 flat ribbon cable clamp 21255122

Drawings of spare parts see chapter 2.

Service Manual 21203788C 09/03 4-17

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 4 Viper terminals

4.2 Upgrade kits for Viper RT terminal

The following upgrade kits are exclusively designed for the Viper RT terminal.

4.2.1 “Analog Interface Option Viper RT” upgrade kit

This upgrade kit allows connection of a second, analog weighing platform to a Viper RL or RD terminal.

Quantity Designation Part no.

1 Upgrade kit “Analog Interface Option Viper RT” comprising: 22010145

1 OptionPac cpl. 21255117 4 round head screw M5 x 12 Torx 22005232 5 round head screw M4 x 6 Torx 22003003 1 screw DIN7500 M4 x 10 Torx 22003002 1 back panel without openings 21255003 1 analog interface option board 21203383

EPROM with interface software RT 21255318

1 cable for analog option 21203604 2 RS232C interface IP65 with cable (soldered) 21203717 4 tapping screw M3 x 6 21050008 1 Sub-D standard housing (dismantled) 22007870 1 pin base 22007869 1 flat ribbon cable clamp 21255122 1 type plate Viper Terminal (sticker) 22010059 1 additional plate (sticker with interface designation) 22010145

Drawings of spare parts see chapters 1 and 2.

4.2.2 “USB Interface Viper RT” upgrade kit This upgrade supplements replaces the existing RS232C interface “COM2” with a USB interface (Universal Serial Bus).

Quantity Designation Part no.

1 Upgrade kit “USB Interface Viper RT” comprising: 22010147

1 board USB option (slave) IP65 (Sub-D socket RS232C / Sub-D connector for USB) 21204114 1 CD-ROM with USB drivers for Microsoft Windows

®

22010158 1 USB cable (with Sub-D and USB type B sockets) 21204031 1 cable ETH/USB option (required only if analog interface option is present) 22010154 1 additional plate (sticker with interface designation) 22010147

Drawings of spare parts see chapter 1.4.

4-18 09/03 Service Manual 21203788C

Section 4 Viper terminals Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

4.2.3 “Ethernet Interface Viper RT” upgrade kit

This upgrade supplements replaces the existing RS232C interface “COM2” with an Ethernet interface.

Quantity Designation Part no.

1 Upgrade kit “Ethernet Interface Viper RT” comprising: 22010148

1 connector plate for 2 x RS232C/Ethernet/PS2/load cell 22010042 1 spacer for Ethernet interface 22008017 1 hexagon nut M3 DIN934 22008019 1 washer M3 DIN125 22008020 1 board Ethernet option (1x RS232C /1 x Ethernet RJ45) 21204027 1 cable ETH/USB option (required only if analog interface option is present) 22010154 1 additional plate (sticker with interface designation) 22010148

Drawings of spare parts see chapter 1.4.

4.2.4 “AccuPac Viper RT” upgrade kit

This upgrade kit enables the Viper RT terminal to be operated without being connected to the power supply.

This upgrade kit is not yet available

4.3 Certification set for Viper terminals and scales

This upgrade kit enables an authorized W & M inspector to properly seal a Viper weighing system after certification.

Quantity Designation Part no.

1 Upgrade kit “Viper certification set ” comprising: 21203903

1 securing plate 21203485 1 type plate Viper Terminal (sticker) 22010059 3 capstan headed screw DIN404 00205949

Contents Page

1 Important information....................................................................................................................... 5-2

1.1 Safety and environment...................................................................................................................... 5-2

1.2 Tools and working aids...................................................................................................................... 5-2

1.3 Work instructions .............................................................................................................................. 5-2

2 Replacing the keypad overlay ........................................................................................................... 5-3

3 Replacing the AC adapter ................................................................................................................. 5-3

4 Replacing the battery ....................................................................................................................... 5-3

5 Replacing the charging PCB.............................................................................................................. 5-4

6 Replacing the analog PCB ................................................................................................................ 5-4

7 Replacing the display mounting plate, display unit and digital PCB..................................................... 5-5

7.1 Preliminary work ............................................................................................................................... 5-5

7.2 Replacing the display mounting plate .................................................................................................. 5-5

7.3 Replacing the liquid crystal display (LCD) or the back-light unit .............................................................. 5-5

7.4 Replacing the digital PCB ................................................................................................................... 5-6

7.5 Final reassembly ............................................................................................................................... 5-6

8 Replacing the software (Viper M and L scales with strain gauge load cells only) ................................. 5-7

9 Replacing the load cell ..................................................................................................................... 5-8

9.1 Replacing a strain gauge load cell ...................................................................................................... 5-8

9.2 Replacing the MonoBloc load cell ....................................................................................................... 5-10

9.2.1 Replacing the MonoBloc load cell of scales with small platforms ............................................................ 5-10

9.2.2 Replacing the MonoBloc load cell of scales with large platforms ............................................................. 5-11

Section 5

Repair of Viper scales

5-2 09/03 Service Manual 21203788C

Section 5 Repair of Viper scales Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

1 Important information

This section describes how to change individual components of the Viper scales. When doing this, please refer to the exploded view drawings and spare parts lists in sections 2 and 3. Important: After replacing components, a functional check of the scale must always be carried out.

1.1 Safety and environment

The following instructions must be observed for all repairs:

– Disconnect the scale from the power supply before starting repair work! – The scale contains electronic components which can be damaged by electro-

static discharges. You must therefore always wear a grounded wriststrap when performing repair work! Grounded wriststraps can be purchased from specialist electronics dealers.

– Defective components must be disposed of according to the instructions in

section 1!

• Servicing work in explosion hazard zones is strictly prohibited. Ignition power could inadvertently be generated, causing an explosion. Servicing work should therefore only be undertaken in secure areas. The location in which the scale is installed must be declared by the system operator to be safe for the duration of the repair work. If no such declaration is available, the scale must be switched off and disconnected from the power supply and moved to a safe area.

• The scales can also be disconnected and reconnected to the power supply in potentially explosive environments provided that the power supply has first been switched off.

1.2 Tools and working aids

– Screwdrivers: Torx T10, T20, T25, and T30; Phillips 5 mm; flat type size 0 and 4 – Torque wrench up to 10 Nm – Wrench heads Torx T25, T30, and hex 17 mm – Open-end wrench, size 20 – Feeler gauge – Carpet knife (“cutter”) – Grounded wriststrap (as protection against electrostatic discharges) – Weights of class M1 or F1

1.3 Work instructions

Take great care when inserting and tightening screws into holes tapped directly into the aluminum casting: After inserting the screw, always turn it first about 1 turn counterclockwise until it engages in the existing thread, and only then screw it tight! Do not tighten the screw too much, since this may damage the thread in the aluminum casting!

Service Manual 21203788C 09/03 5-3

Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 5 Repair of Viper scales

2 Replacing the keypad overlay

Notes for Viper explosion proof (Ex) scales: To prevent electrostatic charging of the keypad overlay, the display

insert has a metallized coating. Since this coating is detached when the keypad overlay is removed, the keypad overlay on these scales can only be replaced in conjunction with the display insert, the specification plate and the “Ex” sticker (see chapter 7).

• Lift up the defective keypad overlay (if necessary carefully prying it up with a knife) and gently peel it off the scale. Note: take

care that the specification label is not damaged when the membrane is removed!

• Carefully clean display mounting plate, keypad membrane (Viper T) and window (removing all traces of adhesive).

• Make sure that the specification label is in its correct position (must be visible through the window in the keypad overlay), then peel off the protective film from the new membrane and carefully affix the latter to the display mounting plate. Press the keypad overlay down uniformly.

3 Replacing the AC adapter

Note: The AC adapter has a fuse as overcurrent protection. For safety reasons this fuse cannot be replaced, and the AC adapter must therefore be replaced completely if the fuse blows. This applies only to scales that are connected directly to the AC power line (without rechargeable battery and external AC adapter).

• Unscrew the adjustable feet and remove them.

• Undo the bottom plate retaining screws, removing them and the plate itself.

• Disconnect the AC adapter cable from the analog PCB.

• Remove the AC adapter (held on by an adhesive patch) from the wall of the housing . If necessary, carefully insert a flat blade (knife or screwdriver) between adapter and housing and pry them apart. Remove all traces of adhesive from the housing.

• Undo the 4 screws holding the blanking plate in place (rear panel of scale) and remove the plate.

• Slide the AC adapter power cord grommet out of the blanking plate. Remove the AC adapter from the scale.

• Place the new AC adapter in the scale and fix it in place with the adhesive patch.

• Locate the power cord grommet (with its closed side facing up!) in the center of the blanking plate slot, then press the grommet down thoroughly. This requires a fair amount of force which is intended as it ensures proper IP protection. Caution: Never use a hammer or similar tool for pushing the grommet into place because this may damage the wires! Once the grommet is properly located in the slot you may fasten the blanking plate.

Note for scales with IP65 protection: Check that the seal of the blanking plate is still correctly fastened to the housing. If it is not, the seal must be replaced as follows: Remove the existing seal from the housing so as to leave no trace. Clean and degrease the surface to which it was fastened. Carefully affix the new seal to the housing in exactly the right position.

• Plug the AC adapter output cable onto the analog PCB, then replace the bottom plate and the adjustable feet.

4 Replacing the battery

Note: This procedure is only required for scales that have a built-in rechargeable battery and an external AC adapter.

• Unscrew the adjustable feed screws and remove them.

• Undo the bottom plate retaining screws, removing them and the plate itself.

• Undo the screws holding the RS connector plate in place (rear panel of scale) and remove the plate.

• Slide the charging PCB out from the guide and remove both plugs on the PCB (connection cable to battery or analog PCB).

• Remove the battery from the wall of the housing (held in place by the adhesive strip). If necessary, carefully insert a flat blade (knife or screwdriver) between the battery and housing and pry them apart. Remove all traces of adhesive from the housing.

• Remove the battery from the scale and disconnect the cable to the charging PCB.

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Section 5 Repair of Viper scales Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals

• Plug the cable to the charging PCB into the new battery (+ = red cable, – = blue cable).

• Attach the adhesive patch to the wall of the housing, remove its protective foil, place the battery in the scale and press it against the wall of the housing.

• Attach both plugs with connectors to the charging PCB and slide the PCB back it into the guide.

• Replace the RS connector plate and secure with the screws. Note for scales with IP65 protection: Check that the seal of the RS connector plate is still correctly fastened to the housing.

If it is not, the seal must be replaced as follows: Remove the existing seal from the housing so as to leave no trace. Clean and degrease the surface to which it was fastened. Carefully affix the new seal to the housing in exactly the right position.

• Check the connections of all cables: The cables must lie in the correct slots of the housing, to ensure they are not pinched by the bottom plate.

• Replace the bottom plate and the adjustable feet.

5 Replacing the charging PCB

Note: This procedure is only required for scales with a built-in battery. Before fitting the new charging PCB, check that the correct AC adapter for battery operation is present (see spare parts lists in sections 2 and 3). If not, the AC adapter must also

be replaced.

• Undo the screws holding the rear panel of the scale and remove the panel.

• Slide the PCB out from the guide and remove both plugs on the PCB (connection cable to battery and analog PCB).

• Attach both plugs with connectors to the (new) charging PCB and slide it into the guide.

• Replace the rear panel and secure with the 4 screws. Check that the seal of the rear panel is still correctly fastened to the housing. If it is not, the seal must be replaced as follows:

Remove the existing seal from the housing so as to leave no trace. Clean and degrease the surface to which it was fastened. Carefully affix the new seal to the housing in exactly the right position.

6 Replacing the analog PCB

Note: For scales with MonoBloc load cells the entire weighing module is usually replaced as its components (load cell and

analog PCB) are a matching set: The analog PCB contains all temperature compensation data of the load cell (TK data). If only the analog PCB is to be replaced, then please note the following: A printout with the TK data of the load cell should be included in every scale. If this is not the case then this data must be printed out before the analog PCB is replaced. Otherwise the TK data cannot be loaded into the new analog PCB (see section 7)! Viper Ex scales also require the PSU power supply unit in order to print out and restore TK data. If this is not available, the entire weighing module must be replaced.

• Unscrew the adjustable feet and remove them.

• Undo the bottom plate retaining screws, removing them and the plate itself.

• Disconnect load cell cable, connecting cable to the digital PCB and the AC adapter output cable from the analog PCB.

• Pull off the two spring clips from the analog PCB and remove it.

• Fit the new analog PCB and fix it in place with the spring clips.

• Connect the load cell cable, the A/D cable from the digital PCB and the AC adapter output cable to the analog PCB.

• Replace the bottom plate and the adjustable feet.

Note

: After replacing the analog PCB all scale data plus all user settings must be re-entered (see section 5)! The scale must first be calibrated and a linearization and recalibration carried out as required. For scales with MonoBloc load cells the temperature compensation data of the load cell must first be loaded into the new analog PCB via computer (see section 7).

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Viper M, L, D and T Scales/Viper RM, RL, RD and RT Terminals Section 5 Repair of Viper scales

7 Replacing the display mounting plate, display unit and digital PCB

The display mounting plate is located underneath the keypad overlay and is located in the scale housing by 6 snaps. The display unit comprises the digital PCB, the liquid crystal display (LCD) and the back-light unit (on the Viper T the lighting is integrated into the LCD module). It is held in place on the mounting plate by snaps and one screw. The digital PCB is connected to the analog PCB and the RS232C interface by two ribbon cables (on Viper D and T scales there is an additional cable for the keypad).

7.1 Preliminary work

• Unscrew the adjustable feet and remove them.

• Undo the bottom plate retaining screws, removing them and the plate itself.

• Viper M, L und D: Remove both EMC clamps. Undo the retaining screw which fastens the display unit to the mounting plate.

Pull back the two front cantilever snaps holding the display unit to release it, raise the front edge of the display unit and withdraw it from the rear snaps. Disconnect the RS232 cable and the connecting cable to the analog PCB from the digital PCB (on Viper D scales also remove the cable of the numeric keypad membrane). Remove the display unit.

• Viper T: Unfasten the 5 screws holding the digital PCB to the scale housing. Detach all cable connections from the digital PCB

and PCB. Unfasten the mounting screw fixing the LCD module to the display insert. Push the front retaining clips on the LCD module forward slightly, swivel the module up and pull it out from the rear brackets.

7.2 Replacing the display mounting plate

Note: In order to replace the display mounting plate, the keypad overlay must be removed. This cannot be reused and must also

be replaced. On Viper D and T scales the pressure sensitive membrane for the keypad must be replaced at the same time as it cannot be removed from the display mounting plate without damage.

• Remove keypad overlay (chapter 2).

• Push the 3 cantilever snaps at the front edge of the display mounting plate inwards to release the plate and remove it to the front.

• Insert the new display mounting plate into the aperture so that it clicks into place. Note: On Viper Ex scales the window on the display insert is covered with a conductive, transparent film. Do not touch this film otherwise fingerprints will remain visible. If necessary clean the film by wiping it gently with a soft antistatic cloth.

• Viper D and T scales only: peel off the protective film from the new keypad membrane and carefully affix the latter to the display mounting plate.

• Apply the new self-adhesive keypad overlay (chapter 2).

7.3 Replacing the liquid crystal display (LCD) or the back-light unit

The following steps apply only to Viper M, L and D scales. On Viper T scales the entire LCD module must be replaced where applicable (see chapter 7.1 for dismantling instructions).

• Place the display unit with the digital PCB downwards on a conductive CMOS film.

• Disconnect the backlighting ribbon cable from the digital PCB.

• Carefully insert a flat blade screwdriver (size 4) between the digital PCB and the back-light unit immediately adjacent to the connectors.

• With the screwdriver pry the liquid crystal display and the back-light unit out of the socket strips. When doing this, lever the shaft of the screwdriver against the edge of the digital PCB. Never lever the tip of the screwdriver against the surface of the

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PCB, as this could damage the latter!

• Remove the upper protective cover of the back-light unit.

• Place the new back-light unit onto the digital PCB (it snaps into place on the board).

• Remove the upper and lower protective cover of the LCD.

• Carefully place the LCD onto the back-light unit and ensure that the connector pins are correctly aligned with the socket strips. When correctly positioned, the ends of the LCD and back-light unit are flush. Use a flat object such as a ruler to exert a uniform pressure on the LCD and gently push it home.

• Push the back-light unit ribbon cable connector onto the digital PCB pins.

7.4 Replacing the digital PCB

The following steps apply only to Viper M, L and D scales. On Viper T scales the digital PCB and the LCD are separate units that can be replaced individually (see section 7.1 for dismantling instructions).

• Remove the LCD and back-light unit as described in the previous chapter.

• Remove the EPROM from its socket (Viper M and L scales with strain gauge load cells only). With Viper D scales and all scales with MonoBolc load cells the entire digital PCB inlcuding the soldered Flash Memory chip must be replaced if downloading the scale software via a computer fails for any reason (see section 7).

• Fit LCD and back-light unit onto the new digital PCB (chapter 7.3). Fit the EPROM (Viper M and L scales with strain gauge load cells only); see the notes in chapter 8.

7.5 Final reassembly

• Connect the RS232 cable and the cable from the analog PCB to the digital PCB (on Viper D scales also connect the cable of the numeric keypad membrane).

• Engage the display unit or the LCD module (Viper T) under the rear snaps of the display mounting plate and then lower its front edge until it snaps into place. Fit the retaining screw.

Caution: On the Viper M the LC display is only held in the connector strip on one side. Because of this, for assembly the PCB, the display, and the backlighting must be held together with the hand, otherwise the backlighting may come out of the drilled holes in the PCB and be displaced!

• Install both EMC clamps (does not apply to Viper T).

• Viper T scales only: Attach all cables to the digital PCB and secure the board to the scale housing with the 5 screws.

• Replace the bottom plate and adjustable feet.

Mettler Toledo Viper M, Viper L, Viper D, Viper T, Viper RM Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual