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AD-4402 Page 13
3.2.1.
3.2.1.3.2.1.
3.2.1. Verifying
VerifyingVerifying
Verifying Loadcell Output and Input Sensitivity
Loadcell Output and Input Sensitivity Loadcell Output and Input Sensitivity
Loadcell Output and Input Sensitivity
The input sensitivity of the indicator is 0.3µV/division or more. Adapt to the following
inequality, when you design a weighing instrument using the indicator and loadcell(s).
Caution
A change in input voltage sensitivity is equivalent to a one division change of
the display. Select as large an input voltage sensitivity voltage as possible so
that the weighing interval becomes stable.
Consider the leverage if a lever is used.
Weighing instrument
using one loadcell.
A
DBE
3.0
∗∗
≤
Weighing instrument
using multi-loadcell
NA
DBE
3.0
∗
∗∗
≤
A: Rated capacity of loadcell [kg]
B: Rated output [mV/V]
D:Weighing interval [kg]
E: Excitation voltage [mV]
N:Number of loadcells
Verification Example
Verification ExampleVerification Example
Verification Example
Design:
Loadcell N=1
Rated capacity A=750 [kg]
Rated output B=3 [mV/V]
Excitation voltage E=5000 [mV]
Weighing interval D=0.05 [kg]
Weighing capacity 300 [kg]
3.01
750
05.035000
≥=
∗∗
. Therefore,
regard the instrument as a good design.