The model 20/3 is a precision, loop powered 2-wire
transmitter with galvanic isolation between its input and the current-loop output signal.
The 20/3 provides the necessary circuitry for amplification and processing of DC
mV/mA/Volt signals from various sensors and signal sources.Model 20/3L also provides input
linearization to correct for non-linearity of many input sensors. An optional LCD
indicator is available to indicate the output in Engineering Units.The 20/3 can be easily
ranged without requiring special tools or board modifications. The transmitter is a member
of Mescon's family of advanced Universal Input 2-wire transmitters and signal
conditioners. As such it can be readily reconfigured to accept other popular input types
such as RTD, Thermocouples and Potentiometers. A TEST terminal provides a 40-200 mV signal
proportional to the 4-20mA output. Applying a DVM to the TEST terminals allows monitoring
and verification of the output without interrupting or disconnecting the current
loop.