MS183 , a smart 2-wire in-head and dual-input transmitter module with HART® -protocol, has measurement input for resistance Thermometers (RTD), thermocouples, resistance or millivolt signals in 2-, 3- or 4-wire connection and converts various input signals into a standard 4 to 20 mA analog(high selector, average value or D-value) output signal or 2-way digtal output signals with HART® -protocol after linear processing. The transmitter is programmable directly from PC or via the HART communication. Isolation also is provided between the input and output. A special signal can be set in advance while the sensor burnout or short.

Primary Technical Characteristics
Programmable         Use PC or the hand operator
Measuring range       Set via PC or by the hand operator
Input type             Dual-input ( RTD, TC, R or Millivolt signal)
Convert accuracy       ≤0.1％FS
Cold junction accuracy   ±1℃(TC)
Output               4～20mA/20～4mA  Electrical isolation output
                          HART –Protocol output  (2-way)
Max-load            (V -16V)/0.025A(Current output )
Limit current          ≤25mA
Response time          1s
Isolated voltage         1500VAC (input/output)
Alarm signal           Programmable
                               Underranging   linear drop to 3.8 mA
                               Overranging    linear rise to 20.5 mA
                               Sensor break or short-circuit:≤3.6mA or ≥21.0mA
                               Automatic switching while sensor damaged
Power supply          16～30V DC
Temperature drift       0.01％ FS/1℃
Long-term stability      ≤0.1℃ per year or 0.05 ％per year
Ambient              -40～+85℃