Technical Recommendations - HBM VKK2R-8 Ex Bedienungsanleitung

12
7

Technical recommendations

Practical example using a platform with 4 load cells:
D When the four corners of the platform are loaded, note the weighing
machine signals in order to assess the respective differences (in kg) to the
corner of the weighing machine (load cell) with the lowest indication. This
load cell is the reference load cell (4) and does not need balancing (in the
example in Fig. 7.1, load cell 4).
D The chart (Fig. 7.2) is graduated in 7 test load ranges. Select the test loads
used (in this example 12.5 t) in the relevant line. Starting from the
calculated corner load error difference on the X-axis, look for the
intersection with the test load and then, on the Y-axis, read off the
resistance and the most suitable combination. The resistance values here
apply for 350 Ω load cells (see the table in the lid of the VKK...).
In our example, load cell 3 has a corner load error of 80 kg, which produces
an adjustment resistance of 1.5+0.82 Ω (shown in Fig. 7.2).
(Example: Reference load cell +80 kg)
Fig. 7.1: Example: Platform weighing machine with four load cells with 12.5 t
test load
D For the load cell affected (e.g. load cell 3), the necessary resistances are
activated by opening the relevant "0 Ω resistor". Tip: Divide the wire and
bend it to one side
D Repeat this procedure for all the load cells apart from the 'reference load
cell' (in our example, this is load cell 4).
HBM
Load cell 1
12,600 kg
Test load
12.5 t
Load cell 3
12,530 kg
VKK2R-8 Ex
Load cell 2
12,550 kg
Reference load cell 4
12,450 kg
A1552-4.1 en/de