KERN ADJ Series Service Manual
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KERN ADJ Series Service Manual

Analytical balance
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Servicemanual
Analytical balance
KERN ADJ
Version 1.0
09/2019
GB
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
Importør:
Impex Produkter AS
Gamle Drammensvei 107
1363 Høvik
www.impex.no
info@impex.no
Tel.: 22 32 77 20
ADJ-SA-e-1910

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Summary of Contents for KERN ADJ Series

  • 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 Servicemanual Analytical balance Importør: KERN ADJ Impex Produkter AS Gamle Drammensvei 107 1363 Høvik Version 1.0 www.impex.no info@impex.no Tel.: 22 32 77 20...

  • Page 2: Table Of Contents

    KERN Version 1.0 07/2019 Servicemanual Contents Basic Information ..................4 Introdution ....................4 Device overview ..................5 Components ........................5 Keyboard overview ......................6 Overview of display ......................8 Basic Information (General) ............... 9 Intended use ........................9 Improper Use ........................9 Warranty ..........................
  • Page 3 10.2 Procedure linear calibration ..................25 10.3 External weight calibration .................... 28 10.3.1 Factory External Weight Calibration ..............28 Before calibration, please make sure you have preheated the balance for 30 minutes and adjusted the level......................... 28 10.3.2 User ExternalWeightCalibration(user modeC3------0) ........... 30 Adjust theCornerError ................

  • Page 4: Basic Information

    After successful repair the balance will have to be reverified before it can be used again in a statutorily regulated field. 2 Introdution This service manual covers the ADJ 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.

  • Page 5: Device Overview

    3 Device overview 3.1 Components ADJ-SH-e 1910...

  • Page 6: Keyboard Overview

    Pos. Designation Glass windshield Interface RS 232 Weighing pan Bubble level Display Keyboard Foot screws Handle for operation of the side windshield doors Mains adapter connection 3.2 Keyboard overview Designation Function  Turn on/off ON/OFFkey  Exit menu  Adjustment CALkey ...
  • Page 7  Switch-over weighing unit MODEkey  Selecting an application  How to save the reference MENUkey  Switch on/off background illumination of display (keep the button pressed for a long time)  Change setting in the menu PRINTkey  Print out the displayed value ADJ-SH-e 1910...

  • Page 8: Overview Of Display

    3.3 Overview of display Display Description Stabilitydisplay The balance is in stand-by mode Weighing unit “Gram” Weighing unit „Carat“ Weighing unit „Pound“ Weighing unit „Ounce“ Application parts counting Application percentage determination ADJ-SH-e-1910...

  • Page 9: Basic Information (General)

    The structure of the balance may not be modified. This may lead to incorrect weighing results, safety-related faults and destruction of the balance. The balance may only be used according to the described conditions. Other areas of use must be released by KERN in writing. 4.3 Warranty Warranty claims shall be voided in case ...

  • Page 10: Monitoring Of Test Resources

    (www.kern-sohn.com with regard to the monitoring of balance test substances and the test weights required for this. In KERN's accredited DKD calibration laboratory test weights and balances may be calibrated (return to the national standard) fast and at moderate cost.
  • Page 11  Secure all parts against shifting and damage as depicted. ADJ-SH-e 1910...

  • Page 12: Unpacking, Setup And Commissioning

    7 Unpacking, Setup and Commissioning 7.1 Installation Site, Location of Use The balances are designed in a way that reliable weighing results are achieved in common conditions of use. You will work accurately and fast, if you select the right location for your balance. On the installation site observe the following: ...

  • Page 13: Unpacking, Checking And Installation

    7.2 Unpacking, checking and installation Open packaging and remove all parts carefully. Verify that there has been no damage and that all packing items are present. Scope of delivery / serial accessories  Balance  Mains adapter  Operating instructions Prior to any installation and assembly works, the balance must be separated from the mains supply.

  • Page 14: Levelling

    Check, whether the voltage acceptance on the scales is set correctly. Do not connect the scales to the power grid unless the information on the instrument (sticker) matches the local mains voltage. Only use KERN original mains adapter. Using other makes requires consent by KERN. Important: ...

  • Page 15: Initial Commissioning

    Before connecting or disconnecting of additional devices (printer, PC) to the data interface, always disconnect the balance from the power supply. With your balance, only use accessories and peripheral devices by KERN, as they are ideally tuned to your balance.

  • Page 16: Menu

    8 Menu 8.1 Navigation in the menu Access to menu  In weighing mode print first the MENU key, then the PRINT key. The first menu item „C1“ showing the current setting will be displayed. Select menu items  Press the TARE key to select the individual menu items showing the current settings one by one.
  • Page 17  Confirm setting with TARE key, the next menu item will be displayed. Either carry out more settings or exit and save menu (see step 4 or 5) How to save settings and to exit the menu  Press the ON/OFF key, „SAVE“ will be displayed. ...

  • Page 18: Menu Overview

    8.2 Menu overview Menu item Settings Description Adjustment mode C1 - 0 Automatic internal adjustment (ADJ models) External adjustment (ADB models: C1 – 1* always use this setting) C1 - 2 Manual internal adjustment (ADJ models) Reference quantity C2 – 0* C2 - 1 C2 - 2 C2 - 3...
  • Page 19 Automatic internal C7 - 2 4 hours adjustment interval (only ADJ C7 - 3 6 hours models) C7 - 4 8 hours Filter C8 - 0 Low interference degree C8 – 1* Medium interference degree C8 - 2 High interference degree C8 - 3 Not documented * = factory setting...

  • Page 20: Adjustment

    9 Adjustment As the acceleration value due to gravity is not the same at every location on earth, each balance must be coordinated - in compliance with the underlying physical weighing principle - to the existing acceleration due to gravity at its place of location (only if the balance has not already been adjusted to the location in the factory).

  • Page 21: Procedure

    9.2 Procedure: ADJ-SH-e 1910...

  • Page 22: Manual Initiation Of Internal Adjustment

    In case of the adjustment error (e.g. object on the plate) the following error message will be displayed: <CAL NO>, repeat the adjustment procedure. 9.3 Manual initiation of internal adjustment Menu setting <C1-2>, see chapter Fehler! Verweisquelle konnte nicht gefunden werden.. Execution: Press CAL button in the weighing mode.

  • Page 23: Linearity Calibration

    In case of the adjustment error (e.g. object on the plate) the following error message will be displayed: <CAL NO>, repeat the adjustment procedure. 10 Linearity calibration 10.1 Check count value Press ON/OFF to shut down the scale. Press CAL and the screen displays 1 Press TARE and the screen displays 2 ...
  • Page 24  Press ON/OF the screen displays 8888888   Press TARE and the screen displays 200.0000 or 120.0000   Press TARE and the screen displays -1 112111 or -1 1612111   ADJ-SH-e-1910...

  • Page 25: Procedure Linear Calibration

    Press CAL and the screen displays a zero-point count value, such as 397  Put a 100g and a 200 g standard weight (class E2) in the center of the weighing pan respectively, read and record the count value. The count value range of the balance is shown below Zero point 100g 200g...
  • Page 26 Press CAL and the screen displays 1 Press TARE and the screen displays 2  Press CAL and TARE by turns until the screen displays 8  Press ON/OFF the screen displays 8888888    ADJ-SH-e-1910...
  • Page 27 Press CAL key and the screen displays Lnr in and Lin ... successively (at this time the balance goes through zero-point correction).    3 sec  Put a 50 g (class E2) standard weight, press TARE and the screen displays Lin 100 ...

  • Page 28: External Weight Calibration

    3 sec  Add a 50g (class E2) weight on the center of the  weighing pan. 150g in total.    After a few seconds the screen shows 0.0000g. Linearity calibration is completed and the balance returns to normal weighing mode. 10.3 External weight calibration 10.3.1 Factory External Weight Calibration Before calibration, please make sure you have preheated the balance for...
  • Page 29 Press CAL again, you will see the indication <CAL in>. No objects may be left on the weighing plate.   Wait until the <CAL dn>, indication, then carefully set the adjustment weight 100 g, in the centre of the weighing plate and close the windshield door.

  • Page 30: User Externalweightcalibration(User Modec3

    10.3.2 User ExternalWeightCalibration(user modeC3------0) Before calibration, please make sure you have preheated the balance for 30 minutes and adjusted the level. Press CAL key and the screen displaysCAL100   Press TARE key and the screen displays CAL 200 (only valid for balances whose capacity exceeds 200 grams).

  • Page 31: Adjust Thecornererror

    The screen shows CAL..After a few seconds, it displays CAL UP   Remove the weight and the screen displays CAL END  The calibration is over and the balance displays 0.0000g If the balance displays CAL NO, this indicates the balance is not yet correctly calibrated. Please press ON/OFF key to reboot the balance and re-calibrate.
  • Page 32 loaded with weight on the four corners respectively. Corner A: Up Corner B: Down Corner C: Left Corner D: Right C. The corner error of the balance should not exceed 3D. Please refer to the below table. A. Up D. Right C.
  • Page 33 4.2 Adjust Corner Error If the corner error of the balance falls outside the specification range, the four corners of the balance needs to be adjusted Remove the windshield of the balance: Loosen the 3-M3 cross flat head screws and remove the windshield.
  • Page 34 Press TARE key, the balance displays 0.0000 Move the weight to the lower-left corner (F) and record the displayed value of the balance. If it is a positive value, rotate the adjust screw at Position 1 with socket clockwise. If the value is negative, rotate the adjust screw at Position 1 counterclockwise Move the weight to the upper-left corner (G) and...
  • Page 35 Move the weight to the lower-right corner (H) and record the displayed value of the balance. If it is a positive value, rotate the adjust screw at Position with socket clockwise. If the value is negative, rotate the adjust screw at Position 2 counterclockwise. Repeat C~ F procedures until the corner error falls within the specification range.

  • Page 36: Adjustment Of Zero Count And Full Capability Count Value

    12 Adjustment of zero count and full capability count value 12.1 Adjustment of zero count value：  Remove 2*M4 inner Hexagon Sockets at the back of the balance with an Allen wrench, and open the top cover of the balance. ...

  • Page 37: Restoresystemsetting

    display the value around 100.0000 If the value>100.0000,press the PRINT key, until the value correct to 100.0000 If the value < 100.0000, press TARE key, until the value correct to 100.0000. Press Mode keyto save the value, display SAVE… Display 0.0000, back to the weighing situation.
  • Page 38 Therefore, be careful before operating. Press ON/OFF to shut down the scale.  Press CAL and the screen displays 1  Press TARE and the screen displays 2   Press CAL and TARE by turns until the screen displays 9 ...
  • Page 39  Press ON/OFF the screen displays 8888888  Press TARE key，display corresponding balance model  Press CAL key repeatedly，press TARE key to select balance model as desired. The setting is completed. Display“-1 112111”  Switch on the balance Remark： There are ten inner models of this type balance: 200，180，120，60，H200，H180， H120，H60，600c，150c.

  • Page 40: Servicing And Maintenance

    15 Servicing and Maintenance Serial fault Causes Trouble shooting number phenomenon Incomplete 1. The chips on PCB board of 1. Check the IC pins characters the display are not completely and re-weld, and check again broken code welded to avoid insufficient solder or 2.

This manual is also suitable for:

Adj 200Adj 180Adj 120Adj 60Adj h200Adj h180 ... Show all

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