Sewha SI 4010 - Precise Weighing System Planning

DIGITAL WEIGHING INDICATOR
SI 4010
12
4-3-3. Formula to plan the precise weighing system
This “SI 4010” weighing controller’s Max. input sensitivity is 0.2㎶ / Digit.
And for precise weighing system, the following formula must be satisfied.
Caution : “Input sensitivity” means Min. output voltage variation of weighing part to change 1digit. So,
please do not make large input voltage to make reliable weighing system.
Single Load cell use
0.2㎶ ≤
EⅹBⅹD
A : Load cell capacity(kg)
B : Load cell Voltage(mV)
D : Digit
E : affirmation Voltage of Load cell
N : Number of Load cell
A
Plural Load cells use
0.2㎶ ≤
EⅹBⅹD
AⅹN
Example1)
Number of Load cell : 1pcs
Load cell capacity : 500kg
Load cell Voltage : 2mV/V
Digit : 0.05kg
Affirmation Voltage of Load cell : 5V
Max. Capacity of Weighing System : 300kg
Then, estimation result for this weighing system with formula,
5000ⅹ2ⅹ0.05
= 1 ≥ 0.2㎶
The calculated value is larger than 0.2㎶, so this
system has no problem.
500
Example2)
Number of Load cell : 4pcs
Load cell capacity : 500kg
Load cell Voltage : 2mV/V
Digit : 0.10kg
Affirmation Voltage of Load cell : 5V
Max. Capacity of Weighing System : 1,000kg
Then, estimation result for this weighing system with formula,
5000ⅹ2ⅹ0.10
= 0.5 ≥ 0.2㎶
The calculated value is larger than 0.2㎶,
so this system has no problem.
500ⅹ4
Cautions
!