KERN TEE 150-1 Service Manual Download Page 1 | Manualshive

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KERN TEE 150-1 Service Manual Download Page 1

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

GB

Service Manual

Electronic Pocket Balance

Page 2

KERN TEE

Version 1.0 4/2008

TEE-SH-e-0810

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Summary of Contents for TEE 150-1

Page 1: ...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 Pocket Balance Page 2 KERN TEE Version 1 0 4 2008 TEE SH e 0810 ...

Page 2: ... Contents 1 Features 3 2 Calibration Procedure CAL 3 3 Internal Calibration Procedure 3 4 Functional Block Diagram Description 4 4 1 Functional Block Diagram 4 4 2 Function Description 5 5 Trouble Shooting 6 6 To Replace PCB 7 7 To Replace Load Cell Assembly 7 8 Schematics 8 9 Components Layout 9 ...

Page 3: ...and repeat the procedure 3 Internal Calibration Procedure 1 Remove two screws of the rear housing and open it 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 4 The internal counts shall fall in the range from 3 000 to 5 000 In case out of this range connect J8 left side or right side to increas...

Page 4: ...agram Description 4 1 Functional Block Diagram 4 TEE SH e 0810 digital signal analog signal Microprocessor Power control Regulator Low battery detector Keyboard A D Converter Battery 2 x AAA Load cell Sensor Amplifier L C D ...

Page 5: ...tion of the analog 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 etc 5 Display This is the part where the weight is shown out on the LCD display in digital f...

Page 6: ...der LCD Display Zero If display LO check battery 2 5V If display E check internal count Proper readout If unstable reading check load cell and environmental conditions Correct reading If not accurate perform internal calibration If cannot reach full capacity check load cell and internal zero point If always zero check internal zero point Internal calibration if necessary Normal operation ...

Page 7: ...eck other functions such as Tare Backlight and Auto Off 7 To Replace Load Cell Assembly 1 Disassemble rear housing of scale 2 Disassemble screws fixing the load cell 3 Disconnect wires to PCB Replace the load cell with a new one Assemble screws fixing the load cell Connect wires to PCB 4 Perform internal calibration as described in section 3 5 Assemble rear housing of scale 6 Check accuracy of sca...

Page 8: ...8 Schematics TEE 150 1 8 TEE SH e 0810 ...

Page 9: ...9 Components Layout TEE SH e 0810 9 ...

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