A&D PD4000243 manual Verifying Loadcell Output and Input Sensitivity, Verification Example

3.2.1.Verifying Loadcell Output and Input Sensitivity

The input sensitivity of the indicator is 0.3∝ V/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	0.3 ≤	E	∗	B	∗	D	A: Rated capacity of loadcell [kg]
							B: Rated output [mV/V]
using one loadcell.				A
							D:Weighing interval [kg]
Weighing instrument		E ∗		B ∗ D
	0.3 ≤						E: Excitation voltage [mV]
using multi-loadcell			A ∗ N				N:Number of loadcells

Verification Example

Design:
Loadcell	N=1	5000 ∗ 3 ∗ 0.05
Rated capacity	A=750 [kg]		=	1≥	0.3 . Therefore,
Rated output	B=3 [mV/V]	750
Excitation voltage	E=5000 [mV]	regard the instrument as a good design.
Weighing interval	D=0.05 [kg]
Weighing capacity	300 [kg]

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