Measurements [374|376|378|703|704|284|285|634|635|644|645|656|657|664|665|674|675|67 6|677|684|685|954|957|959|963]; Supply Voltage; Load Cell; Measurement Using A Multimeter [374|376|378|703|704|284|285|634|635|644|645|656|657|664|665|674|675| 676|677|684|685|954|957|959|963] - Seca 644 Series Service Manual

Measurements
Measurements
4
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The following section provides an overview of measurements which can be
performed to identify specific errors.
4.1

Supply Voltage

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Measuring the supply voltage at the electronics board provides information on
whether the supply lines to the battery compartment and/or the power supply
unit are OK. Carry out the measurement by connecting a multimeter to
measuring points A and B (see Appendix).
4.2

Load Cell

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The most effective way to identify a defect of the load cell is using the diagnosis
function of seca serva 2.0; if this is not available you can alternatively use a
multimeter (see 4.2.1). A multimeter measurement, however, is less conclusive
so that it should always be second choice.
4.2.1 Measurement Using a Multimeter
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First of all, unsolder the load cell from the electronics and measure the
resistance between the different connecting wires. The tables below show the
values to be
14.11.12/RLEU/ARI/MRE
expected for the
27/40
different types
seca
of load cells:
30-34-00-812c