Seca 374_375_376 NEC1 Service Manual

Seca 374 Digital baby scale Service Manual

  • Adjustable damping.
  • TARE, HOLD, Auto-HOLD and BMIF for extra convenience.
  • Solid surfaces prevent liquid penetration, eliminating cross contamination.
  • Optional measuring rod seca 233 expands scale into a measuring station.

Ergonomic, convenient and time-saving: these are the key words that define the seca 374. Its extra large tray lets you weigh a seated toddler of up to 20 kg (44 lbs), even if the child is fidgety. The adjustable damping function combined with the Auto-HOLD function ensures fast and precise work. Net weight of a diapered baby? Choose TARE. The amount of milk breast-fed to a baby? Use the BMIF (Breast-Milk-Intake-Function). Measuring and weighing in one step? Yes ‒ thanks to the optional measuring rod seca 233. Operate the scale from any location since it can be powered using batteries or by power adapter.

Technical Data Seca 374 Service Manual

Capacity: 44 lbs, 20 kg
Graduation (g): 5g < 10 kg > 10g / 0,2 oz < 22 lbs > 0,5 oz
Power supply: Battery, Power adapter
Measure (W x H x D): 620 x 190 x 358 mm , 24,4 x 7,5 x 14,1 inch
Net weight: 3,6 kg , 7,9 lbs
Functions and Properties: Overload protection, TARE, Auto-clear, BMIF, Auto-HOLD, kg/lbs switch-over, Automatic switch-off, Wireless interface, SEND, RESET, Acoustic signals can be activated, Damping, Auto-SEND
CE: CE 0123

Weight measurement Seca 374

The DMS modules use load cells with strain gauges in a double bridge circuit as sensors. The entire analog part runs on its own supply voltage. This voltage can be switched by the μC to 3V, 5V or 10V. This voltage is also supplied to the load cells. At full load, they deliver a bridge output voltage of 2mV/V.
This voltage is measured by a dual slope a/d converter. The DMS ext module can evaluate up to four load cells which are multiplexed accordingly. Only one load cell can be connected to the other types of DMS modules.

The conversion time is selected so that a new measured value is available every 0.1 s. The resolution of the a/d converter is 0.05 μV/V. If several load cells are connected, keep in mind that the resolution relates to the mean output signal of all the load cells connected. When these measured values are within the expected range, they are converted into a weight value using a third order polynomial. In order to increase accuracy, eight measured values are used to calculate the weight to be displayed. The first value obtained after switch-on is used as the zero point. If the values obtained later on do not deviate strongly from this value, the zero point is corrected in order to compensate for possible drifts.(Please also refer to temperature measurement.)

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Seca 374 Digital baby scale Service Manual