The model 20/2 is a precision, loop powered 2-wire
transmitter with galvanic isolation between its input and the current-loop output signal.
It includes the necessary circuitry for amplification and processing of signals from
Thermocouple sensors. The input circuit can accept all types of Thermocouples and provides
the ice point reference compensation. Model 20/2L also provides input linearization to
correct for the inherent Thermocouple non-linearity. An optional LCD indicator is
available to indicate actual temperarure in °C or °F. The 20/2 can be easily ranged
without requiring special tools or board modifications. The transmitter is a member of
Mescon's family of advanced Universal Input transmitters, which may be readily
reconfigured to accept other popular inputs such as RTD, DC mV/mA/Volt 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.