Seca 769 1321004 Service Manual Download Page 10

Service manual 

Calibration 

12.02.08 /Kr , Rei 

2 (2) 

30-34-00-743_E1 

7.

 

Once the scale has identified the load in the middle of the weighing platform, "CAL L" 

comes up on display and, some seconds later, the display starts flashing to request 

that a load be placed on the scale. The correct weight must now be acknowledged by 

briefly pressing any of the buttons (with the exception of the start button). Once a 

stable weight value has been recognized, the LCD stops flashing and a calibration 

value is calculated and saved. Shortly afterwards, the text "Sto" is displayed on the 

LCD and the scale automatically switches off some seconds later.  

8.

 

Then remove the weight from the scale, return the slide switch on the PCB to its 

original position and re-assemble the display housing. 

9.

 

Now set the scale up again and then switch it on. Afterwards, place a calibrating 

weight on the scale and check whether the correct weight is displayed. If recalibration 

was successful, secure the display housing again with a seal in accordance with 

national regulations. 

1.2.2

  Aborting a recalibration 

The recalibration function can be aborted by switching the scale off before the requested weight has 

been acknowledged 

Summary of Contents for 769 1321004

Page 1: ...l technology Valid as of 01 12 2010 Variants Description LC2 electronic 30 34 00 745 Content Function diagram 25 02 02 281 Adjustment model spezific options 30 34 00 743 Description of faults 30 34 00...

Page 2: ...Scale service Switch on off logics Display representation A maximum of five digits as well as some special characters can be displayed which can appear as shown below Explanation of the special charac...

Page 3: ...hort circuited by means of a jumper switch Access to these contacts can only be gained by destroying the seal and opening the display housing After placing the jumper switch on the scale to start scal...

Page 4: ...against reading out and modifying data via the programming interface Any modification of the data first requires that both memories are completely cleared Fault handling If faults occur they are disp...

Page 5: ...he operation of the scale Temperature measurement In order to compensate for the load cell s temperature drift the temperature is measured regularly and the measured value is adjusted accordingly For...

Page 6: ...es in the module The following memory types are provided Type of memory Size Flash memory 8 Kbytes EEPROM 512 bytes The flash memory holds the firmware for the microcontroller During programming the d...

Page 7: ...ledged The module has a function for subsequent corner correction so that it is not necessary to re adjust the entire scale if a load cell is replaced To carry out subsequent corner correction two loa...

Page 8: ......

Page 9: ...equired 1 Switch on the scale and check the battery status If the battery voltage is low either the early battery warning symbol or the bAtt display is activated If one of the two displays occurs befo...

Page 10: ...culated and saved Shortly afterwards the text Sto is displayed on the LCD and the scale automatically switches off some seconds later 8 Then remove the weight from the scale return the slide switch on...

Page 11: ...to the sensor is interrupted Check the base frame for damage or incorrect assembly Scale shows only the segment test or the readings are varying to much Shortcircuit between sensor cable and housing...

Page 12: ......

Page 13: ...awing page 4 21 04 02 06 215 008 Column painted 34 22 34 02 01 001 009 Display housing 26 23 34 02 04 394 009 Membrane keyboard mod 769 780 25 34 02 04 404 009 Membrane keyboard mod 799 25 34 02 04 40...

Page 14: ...ng page 5 38 19 17 02 218 009 Headpiece tongue 22 39 19 17 02 219 009 Headpiece plate 20 40 19 17 01 324 009 Sliding block 19 41 19 17 02 211 009 Slide guide left 03 42 19 01 02 212 009 Slide guide ri...

Page 15: ...b HAMBURG Gepr ft APPROVED Ver b Datum Name PROJECTION R Archiv_DBWORKS Firma 30 30 34 30 34 00 746 03 nd Mitteil CHANGE 1 2 CONTENTS RESERVED Alle Rechte an und aus diesen Spare parts list mod 769LC...

Page 16: ...diesen pos hinzu Spare parts list mod 769LC 799LC 30 34 00 746 04 R Archiv_DBWORKS Firma 30 30 34 30 34 00 746 04 Freitag 8 Januar 2010 15 09 57 Blatt SHEET 4 4 Gepr ft APPROVED Ver b Erstellt DRAWN...

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