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KERN & Sohn GmbH

Ziegelei 1
D-72336 Balingen
E-Mail: [email protected]

Tel: +49-[0]7433- 9933-0
Fax: +49-[0]7433-9933-149
Internet: www.kern-sohn.com

Service manual
School balance

KERN EMB

Version 3.3
4/2009
GB

EMB-SH-e-0933

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Summary of Contents for EMB

Page 1: ...ohn 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 Service manual School balance KERN EMB Version 3 3 4 2009 GB EMB SH e 0933 ...

Page 2: ...ng ________________________________________________ 9 8 To Replace PCB ________________________________________________ 10 9 To Replace Load Cell Assembly ___________________________________ 11 10 Schematics ____________________________________________________ 12 10 1 For EMB 220 1 EMB 2200 0 EMB 5 2K5 ________________________________ 12 10 2 For EMB 500 1 EMB 1200 1 EMB 5 2K1 ____________________...

Page 3: ...en Die Serviceanleitung ist bindend für Reparaturen Das Gerät muss nach erfolgter Reparatur wieder in den Originalzustand zurückversetzt werden Es dürfen nur Originalersatzteile verwendet werden 2 Features Auto zero Full Tare function 4 weighing units Display segment test function Negative value indication Auto off function battery mode only enable disable Zero tracking enable disable Two types of...

Page 4: ...red calibration weight 3 Gently place the correct calibration weight on the center on the weighing pan Wait until display shows F then turn off In case E is display instead of F this indicates a calibration procedure error unstable or wrong calibration weight applied for calibration Turn the scale off and then on and repeat the procedure EMB SH e 0933 4 ...

Page 5: ...ng Connecting or disconnecting pads on J6 J7 or J8 for EMB 220 1 EMB 2200 0 EMB 5 2K5 J5 J6 J7 or J8 for EMB 500 1 EMB 1200 1 EMB 5 2K1 J1 J2 or J3 for EMB 200 2 EMB 600 2 J2 J3 J4 or J5 for EMB 100 3 EMB 1000 2 can fine tune the reading 5 Press OFF key once Display will show the required calibration weight Place the corresponding calibration weight on the center of the weighing pan Press OFF key ...

Page 6: ...al count is 66 063 With number here 3 You have to set this number before the value In that case the internal count is 321 580 5 Display Segment Test Whenever the scale is power on all segments of the LCD will be turn on for approx 5 seconds Check for any missing segment EMB SH e 0933 6 ...

Page 7: ...Description 6 1 Functional Block Diagram digital signal analog signal Microprocessor Power control Regulator Low battery detector A D Converter 9V 2xAA Battery or Adaptor Load cell Sensor Amplifier L C D Keyboard EMB SH e 0933 7 ...

Page 8: ...nalog to digital converter is using a SIGMA DELTA technique and under the control of the microprocessor 4 Microprocessor The microprocessor control all the functions of the scale such as auto zero A D conversion timings weight calculation display overload indication low battery indication tare function etc 5 Display This is the part where the weight is shown out on the LCD display in digital form ...

Page 9: ...B 500 1 EMB 1000 2 EMB 1200 1 EMB 5 2K1 adaptor 9v If display E check internal count Proper readout If unstable reading check weighing plate overload stopper load cell and wires environmental conditions and stable table Correct reading If not accurate perform internal calibration If cannot reach full capacity check weighing plate overload stopper load cell and internal zero point If always zero ch...

Page 10: ...t EMB 200 2 EMB 600 2 EMB 220 1 EMB 500 1 weight g tol g weight g tol g weight g tol g weight g tol g 50 00 0 02 100 00 0 02 50 0 0 2 100 0 0 3 100 00 0 02 200 00 0 02 100 0 0 2 300 0 0 3 150 00 0 02 400 00 0 04 150 0 0 2 500 0 0 3 200 00 0 02 600 00 0 06 200 0 0 2 EMB 1200 1 EMB 2200 0 EMB 5 2K1 EMB 5 2K5 weight g tol g weight g tol g weight g tol g weight g tol g 200 0 0 3 500 2 1000 3 1000 10 5...

Page 11: ... tol g weight g tol g weight g tol g 50 00 0 02 100 00 0 02 50 0 0 2 100 0 0 3 100 00 0 02 200 00 0 02 100 0 0 2 300 0 0 3 150 00 0 02 400 00 0 04 150 0 0 2 500 0 0 3 200 00 0 02 600 00 0 06 200 0 0 2 EMB 1200 1 EMB 2200 0 EMB 5 2K1 EMB 5 2K5 weight g tol g weight g tol g weight g tol g weight g tol g 200 0 0 3 500 2 1000 3 1000 10 500 0 0 3 1000 2 3000 3 3000 10 1000 0 0 3 1500 2 5000 3 5000 10 1...

Page 12: ...10 Schematics 10 1 For EMB 220 1 EMB 2200 0 EMB 5 2K5 EMB SH e 0933 12 ...

Page 13: ...10 2 For EMB 500 1 EMB 1200 1 EMB 5 2K1 EMB SH e 0933 13 ...

Page 14: ...10 3 For EMB 200 2 EMB 600 2 EMB SH e 0933 14 ...

Page 15: ...10 4 For EMB 100 3 EMB 1000 2 EMB SH e 0933 15 ...

Page 16: ...EMB SH e 0933 16 EMB SH e 0933 16 ...

Page 17: ...11 Components Layout 11 1 For EMB 220 1 EMB 2200 0 EMB 5 2K5 EMB SH e 0933 17 ...

Page 18: ...11 2 For EMB 500 1 EMB 1200 1 EMB 5 2K1 EMB 500 1 EMB 1200 1 EMB 5 2K1 11 3 For EMB 200 2 EMB 600 2 EMB SH e 0933 18 ...

Page 19: ...11 4 For EMB 100 3 EMB 1000 2 EMB SH e 0933 19 ...

Page 20: ...EMB SH e 0933 20 ...

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