What is an Explosion-Proof Temperature Transmitter?
An explosion-proof temperature transmitter is an instrument specifically designed for measuring temperature in hazardous environments. Its explosion-proof properties enable safe and reliable temperature measurement in flammable and explosive environments. It utilizes temperature sensors and signal conversion technology to convert temperature signals into a standard electrical output.
It uses special explosion-proof designs and materials to ensure safe operation in dangerous environments. It typically employs flameproof enclosures, explosion-proof wiring, and explosion-proof circuitry to prevent explosions caused by sparks, arcs, or high temperatures.
How does a temperature transmitter work?
The working principle of a temperature transmitter is primarily to convert a temperature signal into an electrical signal using a temperature sensor and then output it as a standard electrical signal. Usually used temperature transmitters utilize measurement principles such as thermocouples, RTDs, and semiconductors.
A thermocouple temperature transmitter uses the thermoelectric potential between two dissimilar metals to generate an electrical signal to output a temperature value. Its output voltage is linearly related to temperature.
A RTD temperature transmitter uses the fact that the material’s resistance changes with temperature; its output resistance is linearly related to temperature.
A semiconductor temperature transmitter uses the fact that the resistance of a semiconductor material changes with temperature; its output voltage is linearly related to temperature.
How to calibrate a temperature transmitter?
Checking the zero point: Use a calibrator to enter the zero point and check whether the transmitter’s display matches the standard setpoint. If not, adjust the transmitter’s zero adjustment screw to the same zero point as the setpoint.
Span check: Use a calibrator to enter the upper temperature limit and check whether the temperature displayed by the temperature transmitter matches the setpoint. If not, adjust the transmitter’s span adjustment screw to the same temperature as the setpoint.
