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Variants:
769 1321004
769 1321994
780 2321369
7997021099
7997021159
Content:
Description LC2 electronic
Function diagram
Adjustment model spezific options
Description of faults
Cableplan
Spare parts
Manual number:
17-05-01-340-b
Service Manual
for seca 769 LC / 780 LC gost/ 799 LC
Description:
Colum scale with 4 load cell technology
Service Manual Number
17-05-01-340-b
Valid as of:
30-34-00-745
25-02-02-281
30-34-00-743
30-34-00-744
08-02-06-037 a
30-34-00-746 b
01.12.2010
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Summary of Contents for Seca 769 LC
- Page 1 Service Manual Variants: for seca 769 LC / 780 LC gost/ 799 LC 769 1321004 769 1321994 780 2321369 Service Manual Number 7997021099 17-05-01-340-b 7997021159 Valid as of: 01.12.2010 Description: Colum scale with 4 load cell technology Content: Description LC2 electronic...
- Page 2 Brief description of the LC display module Introduction The display module belongs to the LC family of seca’s electronic modules and is used to indicate a weight value measured with the LC weight module and supplied via the module bus. The display module also accommodates the operating elements and can process the weight (hold, tare, etc.).
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Page 3: Operation
The display housing is secured with a seal that must be destroyed to open the housing. Warning: If the seal is destroyed, verification is no longer valid. A special seca service adapter is required to access the programming interface. -
Page 4: Fault Handling
Service Manual Description of the LC2 electronics Type of memory Size Flash memory 8 Kbytes EEPROM 512 bytes The flash memory holds the firmware for the microcontroller. During programming, the data is written to the flash memory via the 10-pin programming interface. The parameters read out by the LC display module from the LC weight module after being set into operation for the very first time are stored in the EEPROM. - Page 5 Service Manual Description of the LC2 electronics Brief description of the LC weight module Introduction The LC weight module is used to determine weights using one or several load cell(s) with strain gauges. The LC module bus supplies the processed measured values to the LC display module. The following block diagram shows the main function blocks of the LC weight module: Voltage Programming...
- Page 6 The programming interface is a 10-pin interface, which is only accessible after opening the housing. The housing is secured with a seal that must be destroyed to open the housing. Warning: If the seal is destroyed, verification is no longer valid. A special seca service adapter is required to access the programming interface.
- Page 7 Service Manual Description of the LC2 electronics Scale service The electronics offer the following service functions: To be able to compensate for linear measuring errors of the scale, resulting e.g. from different forces of gravity at different geographical points, the module has a recalibration function. When the recalibration function is started, the display shows the weight to be placed on the scale.
- Page 9 Service manual Calibration 1. Recalibration instructions mod. 769 / 780 / 799 / 869 / 899 General To compensate linear measuring deviations, which occur e.g. as a result of gravity variations in different gravity zones, has the scale a recalibration function. The recalibration function is activated either by plugging in a jumper or, on newer models, using a slide switch on the PCB Access to these contacts can only be gained by destroying the seal and opening the scale.
- Page 10 Service manual Calibration 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).
- Page 11 Service Manual Description of faults Scales with LC electronic Please refer to the operating instructions to ensure that the scales were operated in the proper manner. In case of a malfunction, the following table will help you to locate the fault. Description of the fault Possible cause Remedy...
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Page 13: Spare Parts List
Service Manual Spare parts list seca 769 LC / 799 LC electronic Item Articel-no. Designation Price stage Baseframe drawing page 3, 02-01-03-386-509 Frame complete, calibrated mod.769 / 780 02-01-03-392-509 Frame complete, calibrated mod. 799 01-13-05-002-009 Foot complete mod. 769 / 780 01-10-04-007-009 Foot complete for levelling mod. - Page 14 Service Manual Spare parts list seca 769 LC / 799 LC electronic Item Articel-no. Designation Price stage Mearuring rod drawing page 5 19-17-02-218-009 Headpiece tongue 19-17-02-219-009 Headpiece plate 19-17-01-324-009 Sliding block 19-17-02-211-009 Slide guide left 19-01-02-212-009 Slide guide right 19-17-01-284-009...
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