Service manual Counting balances KERN CDS / CKE
Contents
1. E N KERN amp Sohn GmbH WAAGEN GEWICHTE BALANCES WEIGHTS Ziegelei 1 Tel 49 0 7433 9933 0 D 72336 Balingen Fax 449 0 7433 9933 149 E Mail info kern sohn com Internet www kern sohn com Service manual Counting balances KERN CDS CKE Version 2 0 4 2010 GB CDS CKE SH e 1020 Cos KERN CDS CKE Version 2 0 4 2010 Service manual Counting balances Table of Contents Basi INTORMAUON mm 3 2 31 ole E UO Use CELO 3 3 Kevboard DESCHIPLION ie Dann Dan Een Haan nennen 4 A MOSS Menier rr reer ere eee Se eee ete ee nae een ee ee cere ee eee 5 5 TROUDICSMNOOUING EE ER EET 6 SMEMP unie dede dent 6 ZEE Cite 7 7 1 How to Enter the Factory Menu 7 7 2 DISplavy CONTAS u ae H 7 7 3 Factory AQLUSIMENE a nasa a un AME RE SERRE COME 8 7 4 Automatic Linearity 9 7 5 Manual Linearity Adjustment tre ea 10 SB EIGCUONIC S eO dennie den eenden deed 11 8 1 Explanation and Connection of Main 11 2iLayo tr or riim PCB osise sa a AA vennen neet enn deeended nanne 12 2 CDS CKE SH e 1020 1 Basic Information Grundlegende Hinweise The device must be repaired only by trained2. PCS g PRINTER 20x 2400Bd 5x 20x PCS g PCS g ESG 4800Bd 5x 20x PCS g ESC 9600Bd 5x 20x PCS g ESC 19200Bd 5x 20x PCS g ESC Numerator 5 20 PCS g ESC BACKLIGHT 5x 20x AUTOPRINT 5x 20x PCS g PCS g ESC BACKLIGHT AUTO AUTOPRT PC 5x 20x PCS g 5x 20x PCS g ESC IMPORTANT Factory settings 9600bd YES Fast 3 Keyboard overview Function The modified settings as well as the adjustment must be stored when switching off via the ON OFF button CDS CKE SH e 1020 5 Troubleshooting Interruption cause OVERLOAD Weight display is not illuminated The weight display changes continually The weighing result is obviously incorrect Either the scale is overloaded or there is a mechanical defect Underload Weighing range has been fallen short of Mechanical defect or a defect in the main PCB In counting and mode part too light The rechargeable battery is empty and should be loaded The balance is not switched on The mains supply connection has been interrupted mains cable not plugged in faulty Power supply interrupted Draught air movement Table floor vibrations The weighing plate is in contact with foreign matter Electromagnetic fields static charging choose different location switch off interfering device if possible The balance display is not set to zero Adjustment is no longer correct Great fluctuations in temperature Electromagnetic fields static ch
3. Press and hold the TARE key approx 10 seconds until Factory Reset appears Press key twice until Lock N appears Set Lock to ON with key The display appears Lock Y Press key until the balance is in weighing mode e g 0 0 g Press and hold the TARE key and press simultaneously the ON OFF key once The display appears Cal NJ Press key to start the factory adjustment The display appears then Place CAL Weight Place the maximum weight on the weighing pan Balance measuring for approx one minute After that balance go back to normal weighing mode Remove the weight and switch off the balance by pressing the ON OFF key Now plug off the power supply and plug in again CDS CKE SH e 1020 7 4 Automatic Linearity Adjustment 1 Turn ON the balance 2 Press and hold the TARE key approx 10 seconds until Factory Reset appears 3 Press key until Linear auto appears 4 Press key to start the automatic linearity adjustment The display appears the first linearity point e g L1 2000 0g 5 Confirm with key or press the to select another linearity point which is outside the permissible tolerances e g L2 4000 0g and confirm with exe key The display appears Place Lin Weight 6 Place the required weight on the centre of the weighing pan and wait until you will get a stable weighing result Remove the weight Now balance is in weighing mode Switch off the
4. 8 Electronics 8 1 Explanation and Connection of Main PCB Pin 1 Power supply Pin 2 Power supply Connection of Pin 3 RS 232 TXD keyboard overlay Pin 4 RS 232 RXD RTE Pin 5 RS 232 GND 12345 eis B 2 Connection of LCD ro bed a het so z display OUT SIG Series resistor Connection of for backlight LCD display min 50 ohm Top Side If required set solder bridge to switch on the scale automatically after plug in the mains adapter without pressing the ON OFF key lesistor for charging circuit model dependent Bottom Side CDS CKE SH e 1020 11 8 2 Layout of Main PCB 601X CDS CKE SH e 1020 12
5. balance by pressing the ON OFF key Now plug off the power supply and plug in again Please notice the linearity points were defined and configured in our production line Therefore it is not possible to change them afterwards without special configuration software CDS CKE SH e 1020 9 7 5 Manual Linearity Adjustment Turn ON the balance After warming up time and adjustment check balance readings in all measuring points In case of differences make a note Press and hold the TARE key approx 10 seconds until Factory Reset appears Press key until Linear man appears Press key to start the manual linearity adjustment The display appears the first linearity point e g L 2000 09 00d With the keys 5 JI j and 40x you can change the stored value Press the key to select another linearity point which is outside the permissible tolerances e g L 4000 09 07d and inscribe the correction value like described above in point 5 and so on To return to normal weighing mode press TARE key once Switch off the balance by pressing the ON OFF key Now plug off the power supply and plug in again Information If there is a positive difference e g 2000 6 g 6 digit you should subtract this difference to the stored value e g L 2000 0 064 If there is a negative difference e g 1999 4 g 6 digit you should add this difference to the stored value e g L 2000 0 06d 10 CDS CKE SH e 1020
6. specialist staff or personnel with professional formation such as a repair specialist accredited by law concerning verification The service manual is obligatory for repair work After repair original conditions of the device have to be restored Only original spare parts should be used Das Ger t darf nur von geschultem oder beruflich ausgebildetem Fachpersonal z B eichrechtlich anerkannter Instandsetzer repariert werden Die Serviceanleitung ist bindend f r Reparaturen Das Ger t muss nach erfolgter Reparatur wieder in den Originalzustand zur ckversetzt werden Es d rfen nur Originalersatzteile verwendet werden 2 introduction This service manual covers the CDS and CKE series and is edited for the authorized servicing personnel Note all rights are reserved Copying any part of this manual is prohibited without our permission CDS CKE SH e 1020 3 3 Keyboard Description CDS CKE 20x2 pcs PRINT ON OFF Taring Invoke the mode menu by pressing the ON OFF key Generate reference using 5 parts In mode menu NO function Generate reference using 10 parts Generate reference using 20 parts In mode menu YES function Switchover pcs gt g In menu Mode function Print out weighing result CDS CKE SH e 1020 4 Mode Menu How to invoke the mode menu Turn on balance Press and hold the TARE key and press the ON OFF key CAL 20x PLACE CAL PCS g WEIGHT PCS g AUTO OFF
7. arging choose different location switch off interfering device if possible owitch the balance off if other error messages should appear and then switch on again Contact the manufacturer if the error message does not disappear 6 Adjustment The balance must be adjusted at its place of installation before initial use and at regular intervals A warm up time of about 2 hours is recommended for stabilisation Please use the recommended adjusting weight according to the technical data in the operating instruction JUSTIEREN ADJUST Calibration SPAN 00Xy 0 g CDS CKE SH e 1020 7 Factory Menu 7 1 How to Enter the Factory Menu 1 2 Turn ON the balance Press and hold the TARE key approx 10 seconds until Factory Reset appears pcs Press R key once The display appears Contrast xx The balance is now in service mode Step trough with key 7 2 Display Contrast 6 Turn ON the balance Press and hold the TARE key approx 10 seconds until Factory Reset appears pcs Press R key once The display appears Contrast xx With the keys and 5 insert the value and confirm with key Press key until the balance is in weighing mode e g 0 0 g Please notice the LCD segments are intense visible if the stored value is low If the stored value is high the LCD segments are low visible CDS CKE SH e 1020 7 3 Factory Adjustment 10 11 12 Turn ON the balance
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