Position: Weighing display's Features
. Large 6 Digit LCD weighing display
. 1:500,000 internal resolution
. 4 point linearisation
. Variable gain load cell sensitivity from 0.5 to 200mV/V
. Simple one pass Auto Calibration
. Gross, Net, Tare and Print function keys
. 4-20mA and 0-10V outputs
. IP65 surface mounting case
. Isolated analogue outputs
. 12 Calibration profiles
. Digital One pass, calibration
. 4-20mA and 0-10V outputs
. Linearisation
. 10V @ 160mA excitation to drive up to 6 x 350 ohm load
. Wide range of power supplies cells
. 3 year guarantee
. High accuracy & Stability
Details Introduction
The High resolution Strain Gauge amplifier is offered in a surface mounted or, housed in a light grey ABS enclosure, sealed to IP65, with external dimensions of 200 x 120 x 75mm.
The unit comprises a 8 digit 12.7mm LCD display, (internal resolution of 1:500,000 Hi Res version) on an intelligent base unit with user configurable 4-20mA and 0-10volt analogue
outputs.
‘Plug-in’ module positions are available for power supply, relay and communications options.
The relay module provides for two set points, together with In Flight compensation. Relays can be inverted and latched, all of these facilities being set in engineering terms. Both relay and analogue outputs have a high level of isolation.
‘Plug in’ Options include
.
Relay Set Points (LR1)
Programmed in engineering units, hysteresis and latching
settings for control or alarm purposes.
.
Communications
To read any value, change set points or any other parameter :
20mA Current loop (LC1)
RS232/RS485 (LC3)
Format
MANTRABUS, ASCII or MODBUS
RTU
A facility is available to alter the default display for Gross or Net values.
The optional communications provide for 20mA noise immune current loop, RS232 and multi drop RS485/422 connections to a PC, PLC or main frame. This allows for the input variable to be
taken and the set up parameters changed.
Communications protocol options include ASCII, MODBUS RTU and MANTRABUS.
The RS232 port is also available for a Time/Date or Data only printer to be connected, to log all the desired activities Baud speeds of 300 to 19200 are programmable.
Power supplies options of 115 or 230VAC and 9 to 32VDC are available.
.
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)
Remote weighing display module
LCD display back lighting
DIN rail mounting for the Motherboard
Fast Analogue Output Module
High Speed Strain Gauge input.
The unit offers two passwords - user and calibrator, 4 point linearisations with multiple load cell calibrations stored if required.
Calibration, A simple input Auto Calibration is achieved by entering the values of the lowest and highest weights used. Analogue output is pre calibrated and can be ranged over any part of the displayed range. Both input and output are calibrated via the front panel keypad. Gross, Net and Tare are activated by front panel function keys. Peak Hold is actioned by volt free contacts.
SMW-HR Product Sheet Issue 1.1 05.09.07 Doc No. ME 0126 SP TD www.mantracourt.co.uk sales@mantracourt.co.uk tel +44 (0)1395 232020
Specifications
Inputs
Strain Gauge Input The input is of the load cell/strain gauge type. A transducer excitation voltage of 9.6 volts @ 160mA
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
Zero Temperature Coefficient 0.0005% FSO/oC typical with 2.5 mV/V sensitivity selected
Span Temperature Coefficient <0.0017% reading/oC
Excitation 9.6V DC nominal, 150mA maximum
Repeatability ±0.002% reading over 90 days
Display Update Rate Programmer keypad selectable between 0.1 and 25.5 seconds
Display Average Set by programmer keypad, up to 64 standard up dates
Measurement Resolution 1:500,000
Analogue Outputs
Type 4-20mA and 0-10V
Drive 4-20mA up to 1Kohm and 0-10 volts up to 2mA
Accuracy 4-20mA + 0.15% of range, typical. 0-10V ±2% before calibration
Resolution as for weighing display up to 13 bits/4.5 digits. Settling time 350mS to within 1% of step change.
Isolation ±130V RMS or DC max to analogue input or any other port
Power Supplies
Order Code Type
LS1 110V-120V AC or 220/230V AC 50-60Hz 10W
LS3 9-32V DC 10W isolated
Data Retention/Protection
Retention: 10 years for set up values, minimum of 100,000 write cycles.
Protection of data and function(s): Watchdog timer giving repeat auto resets. Impending power detection and hold off. Keypad security and time out.
CE & Environmental
Storage temperature -20 to +70oC EMC Emissions BS EN 55011:1998
Operating temperature -10 to 50oC
Relative humidity 95% maximum non condensing EMC Immunity BS EN 61000-42:1995
Safety/Low Voltage Directive 73/23/EEC amended by 93/68/EEC BS EN 61000-4-3:2002
BS EN 61010-1:2001, IEC 1010-1-1990 BS EN 61000-4-4:2004
EMC Directive 89/336/EEC BS EN 61000-4-11:2004
Basic Standard BS EN 61326:1998
Other Options & Accessories
2 Set Points Output through 5A, 230V AC SPCO relays, with programmable latching inversion, hysteresis, In Flight (RL1)
Communications Port For data transfer or print via :-
20mA loop Enabling up to 254 units to be multi dropped to 1 x RS232 via IF25 interface(s)
RS485 Enabling up to 25 units to be multi dropped
RS232 For 1 to 1 connection or standard printer drive
Printer Operation By front panel function key
Baud Rates 300, 600, 1200, 2400, 4800, 9600 (19200 MANTRABUS only) 9600 for MODBUS
DIN Rail Mounting For the motherboard
DC Powering 9-32V DC
Remote Mounting Display module, for panel mounting
Back Lighting For the LCD display
C
In the interest of continued product development, Mantracourt Electronics Limited reserves the right to alter product specifications without prior notice.
This article is from www.mantracourt.co.uk
