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 inbligent Strain Gauge amplifier offers both 4 to 20mA and 0 to 10 volt analogue outputs, from any standard Strain Gauge b. 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 beter 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 b 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 bs 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 b or any other port Power Supplies LS1 LS3 110V-120V AC or 220/230V AC 50-60Hz 10W 9-32V DC 10W isolated
