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6740

6740
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www.nokeval.com sales@nokeval.com • Thermocouples B,C,D,E,G,J,K,L,N,R,S,T • RTD's Pt100, Pt500, Pt1000 ja Ni100, Ni1000 • Process inputs: 0..20mA, 4..20 mA, -20 .. +20 mA 0..5 V, 0..10 V, -10 .. +10 V • IR-thermocouples • mV-inputs -100 .. +100 mV • Outputs: 0..20, 4..20 mA, 0..5, 0..10 V • Programming by PC or hand held programmer 6790 • Galvanic isolation, input/output/power supply • Power supply 24VDC Technical specification: Signal converter 6740 is exceptionally versatile and accepts almost all common sensor inputs. You can configure it by PC. Transmitter front has configuration connector which connects adapter cable POL-RS232 to serial port of the PC. Menu based configuration program is easy to use. By hand held programmer 6790 you can easily control or configurate the transmitter in field conditions. The 16 bit A/D converter enables high accuracy. Linearity of A/ D converter is 0.005 % and conversion accuracy of output signal is 0.05 %, without sensor linearization error. Galvanic isolation is specially important with thermocouples but potential differencies with other measuring circuits can be avoided also in case of process input signals. Small size converter is provided with detachable connectors which speed up installation and programming. Large sensor selection and other inputs as well as versatility reduce stocking costs significantly because the 6740 suits for most measuring applications. Thermocouples: Sensor Range Calibration accuracy < 0.1 % of max. span Cold junction compensation< 0.05 °C / °C Sensor wire influence < 10 kohm, negligible RTD's: Range Converter 6740 construction Sensor connections Max. sensor wire resistance Sensor current Accuracy Calibration accuracy Linearity Sensor error correction Other resistance inputs 0-1000 ohm, potentiometer 50-500 ohm mV-inputs: Accuracy Linearity input impedance Process inputs: Input impedance Accuracy Linearity Emissivity correction Exergen 140F-K and 440F-K -40...+350°C (linearized range) -

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Output: Output Output scaling 0..20, 4..20 mA, 0..5 V, 0..10V scaling on whole range, straight and reversed < 0.03 % of span (DAC) <0.05% of span 3.5 or 24 mA or >10V 24 mA <600 Ω for current and >10 kΩ for voltage Resolution Calibration accuracy Sensor break monitoring Output limiter Output load Model Sensor input Range Output Example. Configuration: Connection 2-pole Nokeval POL-connection (transmitter) RS232, 9600bps, 9-pole D-connector by PC's serial port Meku / Nokeval 6790, red LED-display Serial data Serial protocol Hand held programmer General: Power supply Power consumption...

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