KERN GAB 3K1DM, GAB 15K5DM, GAB 30K10DM, GAB 6K2DM, GAS 3K1DM Service Manual
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KERN & Sohn GmbH
Ziegelei 1
D-72336 Balingen
E-Mail: info@kern-sohn.com
Tel: +49-[0]7433-9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com
GB
Service Manual
Electronic Compact Balance
Page 2
KERN GAB/GAS
Version 1.1 11/2007
GAB/GAS-SH-e-0711
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Read this manual thoroughly and do not perform installation, operation, maintenance, or
inspection unless you fully understand all of the contents.
Keep this manual in a safe place where you can refer to it easily while installing, operating, and
carrying out maintenance or inspections.
OUTLINE
• Purpose of this manual
This manual is edited for the authorized servicing personnel and used when carrying out services and
maintenance of the machine.
• Relative manual
Refer to the operation manual for ususal operations.
• Symbols used in this manual
1. Warning symbols
Symbol Meaning
Indicates information that, if not avoided, is likely to result in loss of life or serious
injury.
Indicates information that, if not avoided, may result in loss of life or serious injury.
Indicates information that, if not avoided, could result in relatively serious or minor
injury, damage to the machine or faulty operation.
2. Explanatory symbols
Symbol Meaning
Indicates information to call or emphasize for attention to the note.
Indicates the reference page.
Indicates information to help understanding.
• Readers of this manual
This manual is edited for the servicing personnel. Use by other personnel is not permitted.
• Note
This manual may be revised in accordance with modification when made in the machine.
All rights are reserved. Copying any part of this manual is prohibited without our permission.
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Contents
Chapter 1 Product Overview.........................................................................................4
1.1 Product Overview..............................................................................................................4
1.2
Standard Specifications ....................................................................................................4
1.3 Appearance.......................................................................................................................5
1.4 Operation Panel ................................................................................................................6
1.5 Outer Dimensions .............................................................................................................7
Chapter 2 Test Mode......................................................................................................8
2.1 Operation ..........................................................................................................................8
2.1.1 Test Mode Flow ...................................................................................................................8
2.1.2 Key Functions (when setting value).....................................................................................9
2.1.3 Starting Test Mode...............................................................................................................9
2.1.4 Ending Test Mode................................................................................................................9
2.1.5 Memory Switch ....................................................................................................................9
2.1.6 C1 Mode – Country No. Setting.........................................................................................10
2.1.7 C2 Mode – Scale No. and Decimal point Setting ..............................................................11
2.1.8 C3 Mode – Span Adjustment.............................................................................................12
2.1.9 F Mode – Setting measuring conditions and EPROM clear ..............................................13
2.1.10 Error No. List......................................................................................................................14
Chapter 3 Hardware Configuration.............................................................................15
3.1 Mechanisms....................................................................................................................15
3.1.1 Small Size (3kg, 6kg).........................................................................................................15
3.1.2 Large Size (15kg, 30kg).....................................................................................................17
3.2 Electric Concerns............................................................................................................19
3.2.1 Block Diagram....................................................................................................................19
3.2.2 Board PS-005 ....................................................................................................................19
Chapter 4 Maintenance................................................................................................21
4.1 Disassembly Procedure (Small Size: 3kg • 6kg).............................................................21
4.1.1 Base Replacement.............................................................................................................21
4.1.2 Board Replacement ...........................................................................................................22
4.1.3 Load Cell Replacement .....................................................................................................23
4.2 Assembly Procedure (Large Size: 15kg • 30kg) .............................................................25
4.2.1 Base Replacement.............................................................................................................25
4.2.2 Board Replacement ...........................................................................................................26
4.2.3 Load Cell Replacement .....................................................................................................27
4.3 Troubleshooting ..............................................................................................................29
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Chapter 1 Product Overview
1.1 Product Overview
• The GAB/GAS Series is a digital scale which can be operated with two batteries.
• The large LCD with 25mm height is provided for the display.
1.2 Standard Specifications
KERN GAB 3K1DM GAB 6K2DM GAB 15K5DM GAB 30K10DM
Readability / calibration value 1 g / 2 g 2 g / 5 g 5 g / 10 g 10 g / 20 g
Weighing range 1.5 kg / 3 kg 3 kg / 6 kg 7.5 kg / 15 kg 15 kg / 30 kg
Warm-up time 10 minutes 10 minutes 10 minutes 10 minutes
Recommended adjustment
weight incl. category
3 kg (M3) 6 kg (M3) 15 kg (M3) 30 kg (M3)
Operating temperature - 5° C .... + 40° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 236 x 282 x 102 - 108 286 x 363 x 102 - 124
Weighing plate (w x d) mm 230 x 180 280 x 260
Weight kg (net) 2 3,2
KERN GAS 3K1DM GAS 6K2DM GAS 15K5DM GAS 30K10DM
Readability / calibration value 1 g / 2 g 2 g / 5 g 5 g / 10 g 10 g / 20 g
Weighing range 1.5 kg / 3 kg 3 kg / 6 kg 7.5 kg / 15 kg 15 kg / 30 kg
Warm-up time 10 minutes 10 minutes 10 minutes 10 minutes
Recommended adjustment
weight incl. category
3 kg (M3) 6 kg (M3) 15 kg (M3) 30 kg (M3)
Operating temperature - 5° C .... + 40° C
Humidity of air max. 80 % (not condensing)
Housing (B x D x H) mm 236 x 282 x 102 - 108 286 x 363 x 102 - 124
Weighing plate (w x d) mm 230 x 180 280 x 260
Weight kg (net) 2 3,2
Reverse display yes yes
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1.3 Appearance
F ront view
Rear view
Bottom view
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1.4 Operation Panel
ON/OFF key
TARE key
Selection key / auto power function
Zeroing key
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1.5 Outer Dimensions
Small size
Large size
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Chapter 2 Test Mode
The Test Mode is used for diagnosis and/or setting at maintenance service.
2.1 Operation
2.1.1 Test Mode Flow
Note: Press the memory switch at any time during test mode to record the data to the EPROM.
Then “P-EP” appears in the display.
TARE
TARE
Setup of Scale No.
Span adjustment
Setting measuring CONDITIONS
EPROM clear
MODE
ON/OFF
C2 XX
C3
F x x x
END
Program No. display
Setup of Country No.
START
L003
C1 X
TARE
TARE
TARE
TARE
TARE
MODE
ZERO
MODE
+
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2.1.2 Key Functions (when setting value)
Key Function
ON
OFF
- Use at TEST mode startup.
(Press this key while the TARE key is depressed.)
- Use at TEST mode end
ZERO
- Use when selecting digits.
TARE
- Press when fixing values after mode or data selection.
- Increments values for each press during data change.
MODE
- Press when entering C3 or F mode
(Tactile switch in the main circuit board)
Stores EPROM data set for each item of the C and F mode.
Memory
Switch
2.1.3 Starting Test Mode
Operation Display
1. Press and release the ON/OFF key while the TARE
key is depressed.
2. Release the TARE key.
2.1.4 Ending Test Mode
Operation Display
1. C mode / F mode status
2. Release the ON/OFF key after depressing for one
second or more.
2.1.5 Memory Switch
Operation Display
1. C mode / F mode status
2. Press the Memory Switch.
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