Instruction Manual

FLINTEC
Document Date Code Rev. Page
FAD - 4 DIGITAL LOADCELL JUNCTION BOX 02.05.00 FAD4_2RM 2 19 of 20
8 SPECIFICATIONS - MAINTENANCE
8.1 TECHNICAL SPECIFICATIONS
ACCURACY CLASS III
RESOLUTION Selectabe up to 99.000 dd (in accordance with regulations).
MAX TARE EFFECT - Max
AUTO ZERO TRACK Off or 0.5 dd setup selectable.
WEIGHT DIGITS 5
WEIGHT STEPS 1, 2, 5, 10, 20, 50
DIGITAL FILTER Rolling average ( 1, 2, 4 samples).
DIGITAL CALIBRATION Digital corner calibration, Deadload, Span and scale.
Parameters via serial commands. Calibration may be performed by
application of weights or by the mV/V values of each loadcell. No
interaction between deadload and span.
LOADCELL EXCITATION + 5 VDC
NUMBER OF LOADCELLS 1 to 4 selectable.
LOADCELL CONNECTION 4 wire technique. Max 4 loadcells 350 Ohm each.
ANALOG INPUT RANGE -0.25 to 4 mV / V for each loadcell. ( - 1.25 mV to 20 mV ).
MIN INPUT PER VSI 0.4 µV / increment.
INPUT AMPLIFIER Input noise 0.3µVp-p. Analogue filter passive 2pole 10Hz.
A/D CONVERTER Sigma delta 550.000 internal counts max.
Conversion speed 8, 20, 40 , 80 conversions / sec (selectable) divided by
the number of loadcells used (Max 40).
LINEARITY Within 0,002% of full scale.
SPAN TEMP - COEFF <
2 ppm /
o
C
ZERO TEMP - COEFF <
2 ppm /
o
C
LONG TERM STABILITY 0.005 % of full scale per year.
DIGITAL PART CPU 89C55 with reset and watchdog ,EEPROM calibration memory.
TTL serial port for either Display and Keyboard or analogue interface Digital
tilt interface. TTL multiprocessor interface.
COMMUNICATIONS - RS485A serial port half duplex. (Default it is 9600, E, 7, 1. )
- Baudrate 2400 to 115000 baud set up selectable.
- 1 start bit, 7 or 8 data bits, even or no parity, 1 stop bit.
POWER SUPPLY 7-10 VAC or 7.5 – 12 VDC external / 150mA.
POWER CONSUMPTION 1.8 W max with 4 x 350 Ohm loadcells.
DIGITAL INPUT (x1) 24Vdc +
20% negative common. Input impedance 3.3 KΩ.
On/Off delay 2msec. Optoisolated to 2.5 kV.
DIGITAL OUTPUT (x2) 24Vdc +
10% transistor (sink) negative common.
Max Current 10mA. Max off state voltage 30VDC. Leakage current
50µA. On/off delay 2msec. Optoisolated to 2.5 kV.
ANALOG OUTPUT Optoisolated, current out . Hardware selectable 0-20 mA or 4-20 mA.
POWER SUPPLY External 15-24 VDC / 35 mA max.
RESOLUTION 16 bit (1/65535) Full scale.
RELATIVE ACCURACY + 0.012% MAX.
OFFSET AT 25
o
C + 0.05% MAX.
OFFSET DRIFT 50ppm/
o
C.
TOTAL OUTPUT ERROR +0.15% (20mA) AT 25
o
C.
TOTAL OUTPUT DRIFT 50ppm /
o
C MAX.
EMC COMPATIBILITY Compliant with EN 45501 standards.