Flintec FAD-4 - Manual (Page 16)

FLINTEC
Document Date Code Rev. Page
FAD - 4 DIGITAL LOADCELL JUNCTION BOX 02.05.00 FAD4_2RM 2 16 of 20
5.2 ELECTRONIC (mV/V).
Assume a scale of Max= 30/60kg , e=0.010/0.020kg , with 4 loadcells of rated capacity 50kg -2mV/V each
and the dead load is 1.940kg.
Conversion rate is 5/sec , the digital filter is normal .
Loadcell data:
L/C1 : 1.9793 mV/V output at 50kg and zero balance : 0.0257 mV/V.
L/C2 : 1.9392 mV/V output at 50kg and zero balance : 0.0276 mV/V.
L/C3 : 1.9577 mV/V output at 50kg and zero balance : 0.0553 mV/V.
L/C4 : 1.9640 mV/V output at 50kg and zero balance : -0.0022 mV/V.
SPAN average = (1.9793 + 1.9392 + 1.9577 +1.9640) / 4=1.9600 mV/V
L/C ZERO BALANCE average = [0.0257 + 0.0276 + 0.0553 + (- 0.0022)] / 4 = 0.0266 mV/V
SCALE DEDLOAD : 1.9600 mV/V . 1.940 kg = 0.0190 mV/V
(4x50kg)
OVERALL DEADLOAD = L/C ZERO BALANCE + SCALE DEADLOAD = 0.0456 mV/V
The calibration procedure should be as follows :
-
Power on the FAD-4 .
Send CORNER DEFINITION commands:
STX ADD C 1 019793 BCS2 BCS1 ETX CORNER 1
STX ADD C 2 019392 BCS2 BCS1 ETX CORNER 2
STX ADD C 3 019577 BCS2 BCS1 ETX CORNER 3
STX ADD C 4 019640 BCS2 BCS1 ETX CORNER 4
Send DEAD LOAD calibration command :
STX ADD A 000456 BCS2 BCS1 ETX
Send SPAN calibration command :
STX ADD B 50000 BCS2 BCS1 ETX
RATED
CAPACITY OF EACH LOADCELL
Send STORE command to save in EEPROM
STX ADD W BCS2 BCS1 ETX
- End.