Load Cell Amplifier, Indicator & Transmitter, IQ300

Model IQ300

is a programmable wall-mount precision digital indicator for load cell and strain gauge applications. The 4-line backlit sunlight readable graphic LCD display is quick and easy to set up with plain language menus and prompts.

With precision front end circuitry for high accuracy and stability, the ratiometric circuitry automatically compensates for temperature drift and excitation voltage variances due to cable loss.

5 or 10 VDC load cell excitation voltage is user selectable for use with both 4-wire and 6-wire load cells, powering up to 6 x 350Ω load cells.

Advanced features include auto-zero tracking; user input linearisation; max/min recording; programmable front pushbuttons; 3 programmable digital inputs; security menu lockout; motion indication; advanced digital filtering; automatic offset calibration; plus many more to provide an all-in-one precision load cell indicator.

RS232 and RS485 serial communications are standard with MODBUS™ RTU and MODBUS™ ASCII protocols. A simple ASCII-out protocol is also provided for serial printing and communicating to large displays.

Model IQ300 includes 4 electromechanical relays, 16-bit analogue retransmission and a Real Time Clock.

High bright 6-digit 20mm LED display
Backlit 4-line graphic LCD for easy setup and calibration
4 or 6 wire load cell / strain gauge input
Powers up to 6 x 350Ω load cells
5V or 10VDC excitation voltage
High precision 22 bit ratiometric ADC front end circuitry
-199999 to +999999 display counts
Easy calibration using known weights or load cell data
16 Bit Analog output (0/4-20mA or 0-10V)
RS232 communications (MODBUS™ RTU / ASCII and Infiniteq ASCII protocols)
RS485 communications (MODBUS™ RTU / ASCII and Infiniteq ASCII protocols)
3 Programmable digital inputs (pull up or pull down field jumper selectable)
3 Programmable front panel push buttons
4 Form-C alarm relay setpoints
Cage-clamp wire connectors
16 Point lineariser
Auto-zero tracking function
Automatic offset calibration
Tare function
Gross/Net function
Selectable and adjustable advanced digital filtering
Alarms, Motion indication and Net front panel status LED's
Max / Min recording
Security menu lockout
Built in menu help hints and prompts
Field upgradable firmware via the RS232 interface
1 year warranty

*General:*	Model IQ300
LED display	6-digit, 20mm (0.8”) 7 segment high brightness red LED
LCD display	128 x 64 graphic mono sunlight readable
Backlight	Yellow / Green with on/off control
Display range	-199999 to +999999
Decimal point	0 to 0.00000
Status LED's	8 LED's for SP1 to SP4, Zero, Net, Motion & Print
Digital Inputs	3 Programmable digital inputs
	Built in hysteresis, filter and input over voltage protection
	Maximum input voltage <30VDC
	Input logic is field jumper selectable
	(Pull up, sinking inputs) - 10kΩ internal resistor to 5V
	(Pull down, sourcing inputs) - 10kΩ internal resistor to common
	Active/Non-Active input trigger: <1.9V
	Non-Active/Active input trigger: >2.3V
Keypad	Full 4 x 3 alphanumeric
	4 Dedicated function keys (Zero, Tare, Print, Gross/Net toggle)
	3 Dual function keys (Display Toggle, Display Hold & Alarm latch reset)
Memory storage	Non-volatile EEPROM, 100000 write cycles minimum
Warm up time	15 minutes
*Power Requirements:*
AC Supply	85-264VAC, 50/60Hz or 120-370VDC
	Isolation: 3000VAC/1min
Low DC Supply	10-30VDC input
	Reverse and over voltage protected
	Isolation: >1000V/1min
High DC Supply	25-70VDC input
	Reverse and over voltage protected
	Isolation: >1000V/1min
Power Consumption	<15W
Fuse (built in)	2A Slow Blow (Wickmann_3721200000)
	RS components part number_226-6599
*Environmental:*
Operating temperature	-10°C to 50°C (14°F to 122°F)
Storage temperature	-40°C to 80°C (-40°F to 176°F)
Operating / storage humidity	<85% RH non-condensing
*Enclosure:*
Overall Dimensions	180 x 180 x 60mm (LxHxD) (7.09 x 7.09 x 2.36”)
	(Height includes cable glands)
Mounting holes	159 x 94mm (6.26 x 3.70”)
Enclosure material	ABS - Flame retardant (UL 94 V-0)
IP rating	IP65 / NEMA 4 / UL Type 4
Connection type	Cage clamp wire connectors
*Input:*
ADC Resolution	22 bit Delta-sigma
Input range	-20mV to +35mV
Conversion rate	12 updates/second
Filter	Moving average digital filter with programmable input step detection
Increment size	1, 2, 5, 10, 20, 50, 100, 200
Input Impedance	>20 MΩ
CMRR	>-110dB
Linearity	<0.01% of full scale
Accuracy	0.05% of full scale
Calibration method	From the load cell calibration certificate or using known weights
Load cell connection	4 or 6 wire connection + shield (sense included)
*Load Cell Excitation:*
Excitation Voltage	Field jumper selectable 5V or 10V (sense included)
Excitation current	Max. 125mA
	Up to 4 x 350Ω or 8 x 1000Ω load cells
Cable compensation	4 wire Kelvin force sense feedback
Cable compensation resistance	<= 10Ω
*Analogue Output:*	(menu selectable)
Ranges	0-20mA
	4-20mA
	0-10V
DAC Resolution	16 Bit
Update rate	12 updates/second
Current output compliance	500Ω maximum load
	(Current is source, not sink)
Voltage output compliance	1kΩ minimum load
Open loop detection	LCD display flashes “mA.Loop” error message
Linearity	<0.02% of full scale
Accuracy	0.05% of full scale
*Communications:*
Protocol	MODBUS RTU
	MODBUS ASCII
	ASCII In (Infiniteq Protocol)
	ASCII Out (Infiniteq Protocol)
RS232 (standard)	Baud rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
	Data bits: 7 or 8 bits
	Parity: Odd, Even or None
	Stop bits: 1 or 2 stop bits
	Non isolated
RS485 (optional)	Baud rate: 1200, 2400, 4800, 9600, 19200, 38400, 57600, 115200
	Data bits: 7 or 8 bits
	Parity: Odd, Even or None
	Stop bits: 1 or 2 stop bits
	Internal 120Ω field jumper selectable termination resistor
	Max 32 instruments per line
*Setpoint Relays:*
*Electro-mechanical:*	(4 relays, standard)
Contact rating	2A@240VAC or 30VDC (resistive load)
Isolation to input circuitry	>1000Vrms for 1 minute
Type	FORM-C (change over contact, NO / NC)
Life expectancy	>100K cycles min. at full load rating. External RC snubber extends relay life for operation with inductive loads
*Solid-State (SSR):*	(optional, 1, 2, 3 or 4)
Contact rating	120mA@400VAC/DC
Isolation to input circuitry	>1000Vrms for 1 minute
Type	FORM-A (Normally open)
*Real Time Clock:*
Battery	CR2032
Accuracy	Better then 3 seconds per day (temperature dependent)