Honeywell SmartLine STT650 Temperature Transmitter User Guide

The STT650 is a DIN Rail mounted high-performance temperature transmitter that is a member of the SmartLine® product family. It provides high measurement accuracy, stability, and dependability over a wide range of processes and ambient temperatures.

The working concept of a temperature transmitter
The signal from a temperature sensor (such as a thermocouple or resistance temperature sensor PT100) is amplified by temperature transmitters, who also make sure the signal is linearized and converted into a voltage signal (0–10 V) or a current signal (0–20mA, 4–20mA).

A temperature transmitter is the best option for many distant temperature measurement applications since it transforms an RTD or thermocouple signal into a 4–20 mA output signal.

Thermocouples, as previously mentioned, are more resilient and can withstand high temperatures and vibrations. Thermistors and RTDs have higher sensitivity. Under ideal circumstances, the lifespan of each type of sensor can range from 20 to 25 years.

The limits of thermometers vary. Kelvin (K) is the S.I. unit of temperature; 1K is equal to -273.15 degrees Celsius.

ABB Temperature Transmitters Included in this series is the TTH200 head-mount temperature transmitter, which has a 0.1% accuracy and a universal sensor input for RTD probes and thermocouples.

Transmitters’ Analogue Output for Temperature Because 10 V output signals are simple to integrate with evaluation equipment, they are widely used in power engineering, HVAC, refrigeration, and ventilation. A range of temperature transmitters using voltage signals as an output is available from WIKA.

Any discrepancy can be found and the sensor can be adjusted to get accurate results with the use of calibration. This is particularly crucial in sectors like food processing, pharmaceuticals, and medical equipment where temperature control is essential.

The most often used kind of temperature sensor is the thermocouple. They are employed in consumer, automotive, and industrial settings. Thermocouples can function over a broad temperature range, are self-powered, don’t need to be excited and react quickly.

analogue senses The most popular kinds of analogue sensors are light, pressure, temperature, sound, and light sensors, as was previously noted. Remember that digital versions of pressure and temperature sensors are also possible.

Set your multimeter to measure resistance before attaching one probe to the outer sensor connector and the other to the sensor across from it to test a temperature sensor. After a few seconds, note the values, which should be between 250 and 1000 ohms, respectively, after submerging in hot and then icy water.

What does a temperature transmitter’s output mean? Since temperature transmitters serve as both the sensor’s and the receiver’s medium, they ought to produce a value that the receiver’s apparatus can measure. The standard output of a temperature transmitter in the industry is either 0-5VDC, 0-10VDC, or 4-20mA.

A device that generates a range of resistances takes the place of the sensor during the temperature transmitter calibration process. For calibration, a specialised tool that mimics thermocouples and RTDs is used. Calibration devices are USB-connected to computers and are programmed using specialised software.

Head mount transmitters, DIN rail or panel mount transmitters, and weather- and explosion-proof transmitters are the three main types of temperature transmitters.

The “zero” adjustment moves the instrument’s function vertically on the graph (), while the “span” adjustment modifies the function’s slope on the graph (). These two adjustments precisely match the terms of the linear function, respective