Measurements seca
17.08.11/RLEU/ARI/MRE 23/36 30-34-00-812a
4 Measurements
[374|376|378|703|704|264|274|284|285|954|957|959|963]
The following section provides an overview of measurements which can be
performed to identify specific errors.
4.1 Supply Voltage
[374|376|378|703|704|264|274|284|285|954|957|959|963]
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 [374|376|378|703|704|284|285|954|957|959|963]
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
[374|376|378|703|704|284|285|954|957|959|963]
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 expected for the different types of load cells:
Measurement between Ohmic resistance [Ω]
V
+
and Sig
+
4 (blue and red) ~250-300
V- and Sig
+
(blue and white) ~250-300
V
+
and Sig- (red and black) ~250-300
V
-
and Sig- (white and black)
~250-300
Sig
+
/Sig-/V
+
/V- and aluminium
body of the load cell
> 1000 M
Table 1: Resistance of platform load cell type Kogean / HBM [703|704x|954|957|959|963]
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