TT273 Field Rangeable RTD Temperature Transmitter
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Model TT273 is a 2-wire temperature transmitter for 2 or 3-lead 100 platinum RTDs. The transmitter converts the RTD temperature into a linearized 4 to 20 mA DC current signal. Because this current signal is immune to leadwire and electrical noise, the TT273 lets you obtain accurate temperature readings from RTDs thousands of feet away. An ordinary twisted pair of wires carries both the temperature signal and power for the transmitter’s electronics. An LED conveniently indicates the status of the control loop. The brightness is directly proportional to the loop current. A very bright LED indicates an open RTD; a dark LED signals a shorted RTD or loss of current loop power.
• 4 to 20 mA current signal
• Fits standard 35 mm DIN rail
• Field-calibrate to your temperature range
• Optional high-accuracy calibration to Minco RTDs for improved accuracy; see next page and page 5-22 for more information
• Optional Input/Output isolation to 600 VRMS
