Table of Contents
Related Manuals for KERN KERN ECB
Summary of Contents for KERN KERN ECB
- Page 1 KERN & Sohn GmbH Ziegelei 1 Tel: +49-[0]7433-9933-0 D-72336 Balingen Fax: +49-[0]7433-9933-149 E-Mail: info@kern-sohn.com Internet: www.kern-sohn.com Service Manual Page 2 Electronic Platform Scales KERN ECB / ECE Version 2.0 4/2008 ECB/ECE-SH-e-0820...
-
Page 2: Table Of Contents
KERN ECB / ECE Version 2.0 4/2008 Service Manual Electronic Platform Scales Table of Contents Features........................3 Calibration Procedure (CAL) ..................3 Internal Calibration Procedure (Linearity Adjustment) ........... 4 Display Segment Test ....................5 Functional Block Diagram / Description..............6 5.1 Functional Block Diagram.....................6... -
Page 3: Features
1 Features • Zero weight function • Negative value indication • Low battery indicator • Auto zero • Display segments test function • Auto off function in battery mode - enable/disable (only ECB) • Overload protection • Overload indication • Digital span calibration •... -
Page 4: Internal Calibration Procedure (Linearity Adjustment)
3 Internal Calibration Procedure (Linearity Adjustment) 1. Remove the bottom cover under the PCB of the scale. 2. Connect J1 on the main board by soldering the pads together. 3. Place scale on a hard level surface. Turn scale on. Display shall show the internal counts. -
Page 5: Display Segment Test
6. If the internal counts are within the range, press [ON/OFF] key once. Display will show [CAL] and then the required calibration weight. Place the corresponding calibration weight on the center of the weighing plate. Wait until display shows the next calibration weight. -
Page 6: Functional Block Diagram / Description
5 Functional Block Diagram / Description 5.1 Functional Block Diagram Keyboard L C D Power control / Battery (6xAA) Microprocessor Regulator & Low battery Adaptor detector digital signal 4 Load cells Amplifier A/D Converter analog (Sensor) signal ECB/ECE-SH-e-0820... -
Page 7: Function Description
5.2 Function Description 1. Load cell This is the heart of the whole system. The load cell itself is arranged as a bridge. The resistance change of the bridge elements is proportional to the load applied on the load cell. Therefore, the output of the load cell is an analog signal, which is proportional to the load applied on the scale. -
Page 8: Trouble Shooting
6 Trouble Shooting Power on ↓ Full Segments? If no display, check batteries / adaptor, keyboard / overlay, connection between keyboard—main board, batteries / adaptor—main board. If missing segments, check fixing of LCD, zebra connector under LCD. ↓ Display Zero? If display [ LO], check battery>7.0V. -
Page 9: To Replace Pcb
7 To Replace PCB 1. Remove the bottom cover under the PCB of the scale. 2. Remove the four screws fixing the PCB and disconnect wires of keyboard, load cell and battery/adaptor (backlight at ECB) from PCB. Replace a new PCB. Connect wires of keyboard, load cell and battery/adaptor (backlight at ECB) to PCB again. -
Page 10: Schematics
8 Schematics ECB/ECE-SH-e-0820... - Page 11 ECB/ECE-SH-e-0820...
-
Page 12: Components Layout
9 Components Layout ECB/ECE-SH-e-0820... - Page 13 ECB/ECE-SH-e-0820...
Need help?
Do you have a question about the KERN ECB and is the answer not in the manual?
Questions and answers