Special Instructions - HBM VKIA405 Montageanleitung

VKIA405
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Special instructions

For other test loads types (e.g. building site vehicle testing), the user can
extend the chart by drawing an additional line between the zero point and the
actual test load used.
If the corner load errors are particularly high or if the load cells have an input
resistance of more than 350 W, it may be that the total value of the resistor
network is insufficient. In these cases, remove the "6th 0-W-resistor" (R125,
R225,...,R825) and replace with a resistor of your choice. This resistor is
added to those of the network when resistors are included by opening them.
If the chart is not big enough, the adjustment resistance can be calculated as
follows:
R
(AW)
+
R
(EA)
L
In this case, you must first check the installation for possible errors.
Note
The basis for calculation described in this section for off-center load
compensation and appearing in the form of a chart, a table or a formula,
apply to load cells with a symmetrical output voltage. In practice, the
compensation effect may differ from the target value, depending of the
type of load cell involved. In this case, you will have to use empirical
values for adjustment.
A2448-1.1 en/de/fr
R
(EA)
R
· L (AW)
(E)
L
(E)
(P)
L
(P)
= adjustment resistance (Ω)
= output resistance of the load cell (Ω)
= measured off-center load error (kg)
= test load (kg)
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