LCA15稱重變送器：
Variable gain Strain Gauge sensitivity from 0.5 to 200mV/V
Simple one pass Auto Calibration
Auto Tare
4-20mA and 0-10V outputs
10V @ 160mA excitation to drive up to 6/350 ohm Strain Gauges
High accuracy
Low drift
Wide range of power supplies
IP65 surface mounting case
Isolated analogue outputs
10 years data retention
Digital programming, calibration & display
Introduction
The intelligent Strain Gauge amplifier offers both 4 to
20mA and 0 to 10 volt analogue outputs, from any standard
Strain Gauge input. 1 pass calibration and setting of the
analogue output range, make the unit extremely user
friendly; being set up by a simple hand held or on board
programmer/display.
Auto Tare and Peak Hold (if set) on the analogue output are
operated via volt free contact closures.
Output Options include
Relay Set Points (LR1)
Programmed in engineering units, with In Flight
compensation and Hysterisis Settings available for control or
alarm purposes.
Communications
To read any value, change set points or any other parameter
via:
20mA Current loop (LC1)
RS232/RS485 (LC3)
Format MANTRABUS, ASCII, MODBUS
RTU
Printers
Activated by a function key or contact will allow print, the current
live value, with header message, engineering units, auto
incrementing batch number and real time if required.
Options
9-32V DC power supply (LS3)
Stainless Steel case sealed to IP65 (LSS)
Available without its case as a separate
Eurocard PCB assembly (LCB)
Inputs
The input is of the Load Cell/Strain Gauge type. With transducer excitation voltage of 9.6 volts @ 160mA to drive 6 x 350R bridges
Compensation by ± sense wires for cable and safety barrier losses down to 3V excitation
Load cell sensitivity is preset via DIL switches to 0.5, 0.8, 1.0 1.25, 1.5, 2.0, 2.5, 3.5, 5, 10, 20, 50, 100 or 200mV/V
Initial offset is no greater than ± 0.15mV (15uV/V) which is cancelled during auto calibration
Speed
Accuracy
Drift
Resolution
Contact inputs
is 100 readings per second with a digital filter to reduce speed
is 90 days ± 0.08% of reading, +/- 0.05% FSD being typical
is 0.002% per degree C @ 2.5mV/V typical
15 bit/ 4.5 digits
are available for auto tare, print and peak hold reset and are volt free
Drive
Accuracy
Resolution
Isolation
4-20mA up to 1Kohm and 0-10 volts up to 2mA
4-20mA + 0.15% of range, typical. 0-10V ±2% before calibration
as for display up to 13 bits/4.5 digits. Settling time 350mS to within 1% of step change
±130V RMS or DC max to analogue input or any other port
Power Supplies
LS1
LS3
110V-120V AC or 220/230V AC 50-60Hz 10W
9-32V DC 10W isolated
