Service Manual Variants: for seca 374 / 375 / 376 CN 3741321009 3741321369 3757021009 3767021004 3767021009 3767021094 3767021099 3767021159 3767021249 Service Manual Number: 17-05-01-329-b Valid as of: 01.03.2008 Description: electronic babyscale multi load cell design, DMS low end module, LCD, for battery use, prepared for mains operation. Content: Operation mod. 374 17-10-06-301 a Operation mod. 375/376 17-10-07-496 c Operation mod.
Service manual Description of the electronics Brief description of the DMS module Introduction The DMS modules are used to determine weights using a load cell with strain gauges. The DMS low end module also accommodates the display and the operating unit. To allow the modules to be adapted to different scales, an EEPROM is integrated which is used to configure the module.
Service manual Description of the electronics Display (only DMS low-end module and SLC highend) Whenever eight new measured values are available, i.e. approx. every 0.8 s, the weight is displayed. The display is an LCD which is controlled by duplex operation. A maximum of five digits as well as a few special characters can be displayed. Explanation of the special characters: • The battery symbol is used to alert of the fact that the battery is going flat.
Service manual Description of the electronics If the start button is directly connected to this interrupt input, a button is obtained which is only active when the scale is switched off. It can be fitted under the platform, for instance, so that the scale is started by briefly stepping on it. Programming The DMS modules are equipped with an EEPROM which is controlled via the I²C bus protocol. On this EEPROM all parameters are stored that can be used to influence the program sequence.
Service manual Description of the electronics Time base From the quartz’s 4.19MHz a time base is derived which controls all timed processes in the scale. These are, for instance, various timeouts and the on-time. After expiry of the on-time, the supply voltage for the analog part, for voltage measurement and for the EEPROM is switched off. The LCD is switched off, all ports are set to zero-signal level and the quartz is stopped.
Service manual Description of the electronics Technical data Supply voltage: Supply current: Zero-signal current: Operating temperature: Storage temperature: 05.08.03 /Jensen / Rei Load cell voltage + 0.5 V to 15 V approximate load cell current typ. 2µA approx.
Service manual Description of faults 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.
Service manual Description of the fault Description of faults Possible cause • Er:x:11 • Sensor is defective or supply lines are damaged • Er:x:12 • Initial load is too high Remedy • Check connection cables, check sensor and replace as required (if parts a replaced, a recalibration is necessary) • If several load cell are used, check the allocation (colour codes) • Check the initial load • Check the load lever (stuck or bent; check the sensor, replace it if necessary and carry out a recalibration
Vogel & Halke Created on: 30.06.1998 Holger Panier / SE File: 00603_e1.doc Printed on: 07.07.1999 seca Description of the calibration mode for scales with modular electronics General: Seca scales with modular electronics are fitted with a software-controlled calibration device that is operated using the existing controls. This device can be used to recalibrate the scales or to set the scales to different GAL values.
Vogel & Halke Created on: 30.06.1998 Holger Panier / SE File: 00603_e1.doc Printed on: 07.07.1999 seca Pressing the kg/lbs key for less than 1.5 seconds causes the weight shown on the display to be increased or decreased by 10 g (depending on the mode currently selected). As the resolution of the display is lower, the displayed value will not necessarily be increased or decreased each time the kg/lbs key is pressed. Repeat the above procedure until the displayed weight and the test weight match.
Vogel & Halke Created on: 30.06.1998 Holger Panier / SE File: 00603_e1.doc Printed on: 07.07.1999 seca Summary of a typical recalibration sequence: Action carried out by the user The scales are switched off. Press the kg/lbs key and keep it depressed while simultaneously pressing the start key. Release both keys. Press the kg/lbs key for more than 1.5 seconds within the next 5 seconds. 5 seconds have passed and no key has been pressed. Place the test weight onto the scales.
seca page 1 (2) PC configuration program Instructions for PC-based configuration PC-based configuration is used for diagnosis or recalibration of all seca scales with modular electronics.
seca Standard case page 2 (2) PC configuration program Connection to the existing display unit port. The display can instead be connected to the second modular socket of the service module. DMS module with integrated display 08-06-18-082 If there is no modular socket on the back of the PCB, retrofit one. DETF module with integrated display Pick off the signal directly from the PCB via the DETF LEM bus cable.
Service Manual Replacement instructions Mod. 374/375/376 Removing the power supply Before starting any work, unplug the mains plug and remove the batteries! ESD protection measures must be taken whenever work is performed on electronic components. 1. Opening the scale (page 2) 1.2 Open the battery compartment cover (B) and unscrew the screw (C). Then push the electronics compartment cover (D) slightly to the right and remove it. 1.
A B C D E F D 8 8 EM K C I P O B 7 7 J NB 6 6 5 H 5 HAMBURG 01 08.11.2004 Wint. H G 1:10 Maßstab / SCALE : Werkstoff / MATERIAL : Änd.Mitteil. / CHANGE: Index / REVISION: Datum/Name: WZ F 4 2 30.01.2006 reinhold Erstellt / DRAWN Geprüft / APPROVED Ver. _ PROJECTION Austauschanw. 374/375/376 CN Replacement Benennung / TITLE : NF 3 B C D E F Blatt/SHEET 2 30-34-00-726 F:\ARCHIV_DBWORKS\Firma\30-\30-34-\30-34-00-726 Nr. / NO.
Service Manual Spare parts list seca 374 / 375 / 376 Item. Articel no. Designation Price stage 01 02-01-01-267-009 Frame 30 02 02-03-01-070-509 Mould compl. top, bottom, viewing glas, Push-buttons 40 when order, please clearly indicate the print of puh buttons 03 04 05 06 07 08 09 10 11 12 13 14 15 16 17 18 19 (20) 05.02.
A B C D E F 8 12 8 03 16 14 08 13 11 7 7 18 01 6 19 10 09 6 5 5 1:10 Maßstab / SCALE : Werkstoff / MATERIAL : HAMBURG 3 05 06 2 14.02.2006 Reinhold Erstellt / DRAWN Geprüft / APPROVED Ver. b PROJECTION 04 Ersatzteilliste 374, 375, 376 Spare parts list 374, 375, 376 Benennung / TITLE : 12.03.2007 Rein. 05.02.2008 Rein. Sticker ad b 07 Änd.Mitteil.
