www.nokeval.com [email protected] 2-wire field indicator 311 for temperature sensors and process inputs • RTD sensors Pt100, Pt1000 • Thermocouples B, C, D, E, G, J, K, L, N, R, S or T • Process inputs 0/4..20 mA tai 0..10 V • 2-wire output 4..20 mA • Freely scaleable 4-digit bright LED display • Configuration via front panel • 2 alarm relays • 6 points xy linearisation for process inputs • Password for configuration • Enclosure protection IP65 The wide variety of sensor types makes the field indicator 311 ideal for all kind of temperature applications. Further, the 311 also accepts thermopile infrared sensors and process inputs 4-20 mA and 0-10 V. Sensor selections, display and output scalings are easy to do with front keys. You can also prevent accessing to the menu by setting a password. The two-wire indicator 311 saves installation and cable costs especially where the distances are long, as no separate power supply is needed . Though the output 4-20 mA is available as standard you can connect power supply 12-28 V directly to output terminals, if you do not need output. The 311 takes only 8 mA from 24 VDC power supply, when output is not used. The bright red LED display shows measuring values in all conditions replacing badly readable LCD displays. The 311 is a very accurate and stable indicator and transmitter. Therefore it can be used in all kind of applications demanding high accuracy. Input signal is measured with a 16-bit ADconverter giving resolution of 1/64000. Scaleable output uses a 12-bit converter giving resolution of 1/4000. If you need one or two alarms, model 312 is available. Only one alarm relay can be energized at a time. Alarms are indicated by red LEDs in the front panel. Input is galvanically isolated from output giving good rejection on interference. Input and output scaling can be set separately e.g. display range is 0..5000 and ouput 0..1000 for 4-20 mA. Case protection rating is IP65. 2-wire indicator with 4-20 mA output Display Inputs: RTD-sensors Thermocouples mA- and V-inputs Potentiometers IR-sensors Power supply Galvanically isolated inputs High alarm Low alarm Power supply 10-28V can be connected directly to output terminals when you do not n

Infrared-sensors: IR-sensor Exergen 140F-K and 440F-K Range 140F-K (60°C) -40..+350°C (linearized range) Range 440F-K (220°C) -30..+600°C (llinearized range) Emissivity settings by front panel Output 2-wire output 4-20 mA Output limiter 21 mA (typical) Sensor break indication 3.5 or 21 mA Calibration accuracy Cold junction effect Wire resistance effect Pt100-sensors Sensors Ranges Connection Sensor current Calibration accuracy Temperature effect Linearity Max. wire resistance RTD/potentiometer mV-input mV-range Accuracy Linearity Input resistance Process input Current Voltage Display scaling...