CẢM BIẾN NHIỆT ĐỘ APLISENS MODEL LI-24G/AL

Application and function
The LI-24L and LI-24G temperature transmitters are designed to convert a measurement signal from resistance temperature detectors (RTDs) or thermoelectric sensors (thermocouples) into a 4–20 mA current signal. The transmitters can be configured for one or two measurement channels. When configured for two channels, it is possible to measure the difference, average, average with redundancy, minimum, or maximum temperature. The transmitters feature compensation of ambient temperature influence on measurement error as well as coldjunction compensation for thermocouples using an internal sensor, an external sensor (Pt100), or a fixed reference temperature.The transmitters provide continuous monitoring of memory integrity, correctness of sensor connections, and proper operation of internal components. 
In the LI-24L transmitter, detected abnormalities are indicated by a change in color of the LED indicator located on the front of the housing. 
Galvanic isolation between input and output allows cooperation with any signal source and ensures reliable operation of the transmitters in industrial environments. Electrical connections can be made using wires with a cross-section of up to 1.75 mm². 
The standard communication interface enabling data exchange with the transmitter is the HART protocol. If the user specifies the sensor type and measurement range when placing an order, Aplisens will supply the transmitter configured according to the order. Configuration changes can be commissioned to Aplisens or performed by the user using a PC, a HART/USB converter, and the RAPORT 2 configuration software.
In addition to changing the measurement range and sensor type, communication with the transmitter allows, among other things, configuration of transmitter behavior in the event of sensor circuit break, transmitter calibration, time constant adjustment, piecewise correction of the output characteristic, offsetting the characteristic by a constant value, and entry of a 60-point user-defined characteristic, which enables adaptation to virtually any sensor.
Technical information: See datasheet
Input signal:
      Resistance: Pt100,Ni100 
      Voltage: K, J,S,B,N,T, R, E 
Limit process: 
      -10mV< E<100mV or -100mV< E<1000mV 
      0Ω Min. measuring range: 10mV or 10Ω or 10K
Output signal: 4 - 20 mA + Hart
Power supply:
      10…36 VDC
      Ex: 10…30 VDC 
Base error: ±0,1%
Alarm signal:
      3,75 mA / 21,6 mA (NORMAL)
      3,6 mA / 21 mA (NAMUR NE89)
Time constant: 0,2…1s
Additional electronic damping: 0...30s
Ambient temperature:
      -40…+85°C
      Ex: -40…+70°C
Ordering procedure: See datasheet