Processing Magazine

Smart HART transmitters with accuracy of ±0.014 degrees C

March 7, 2007

The THZ2 and TDZ2 family of two-wire, loop-powered Smart HART Temperature and Signal Transmitters from Moore Industries-International, Inc., have input-to-output analog accuracy up to ±0.014 degrees C (±0.025 degrees F), the best in the industry according to the manufacturer. The 4-20mA temperature output signal also has a superimposed HART digital signal, which allows any HART-compatible control device to program zero, span, sensor trim offset and other calibration variables, and to interrogate and read multiple real-time process variables. Up to 15 transmitters can be linked via a single twisted pair wire. The units can be field-configured to accept 14 RTD types, nine thermocouple types, current and voltage signals, resistance and potentiometer devices, and direct millivolt sources, thus minimizing the need to stock spares. The transmitters can be interrogated and configured with a HART Communicator, HART-based control system, or a PC, laptop or tablet PC equipped with software from Moore Industries. Each transmitter comes with free PC configuration software and a cable.