Seca 703 NEC1 Service Manual
- Compatible with all EMR Systems and EMR ready seca products.
- Heavy duty cast iron base is slip resistant with an anti-tip column design.
- BMI, Pre-TARE, HOLD, Auto-HOLD, Mother/child function.
- At the press of a button, measured results can be wirelessly transmitted to digital printer or a PC.
The multi-faceted talent with network capability.
Weighing small children to obese patients – the seca 703 can do it all. Especially when it comes to finding out BMI and height. Then there are two options: integrate a mechanical measuring rod or receive data wirelessly from a separate digital stadiometer. Other advantages include the high load bearing capacity of up to 660 lbs for heavyweight patients, the large and flat platform and time-saving functions Pre-TARE, HOLD, Auto-HOLD and mother/child-function. With everything primed for the future and integration in EMR.
Weight measurement Seca 703 NEC1
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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