Thermal Resistance Temperature Transmitter

Introduction

Thermal resistance temperature transmitter is composed of reference unit, R / V conversion unit, linear circuit, reverse connection protection, current limiting protection, V / I conversion unit, etc. After the thermal resistance signal is converted and amplified, the linear circuit compensates the nonlinear relationship between temperature and resistance, and outputs a 4-20mA constant current signal in linear relationship with the measured temperature through the V / I conversion circuit.

System Composition

The structure of thermal resistance temperature transmitter can be generally divided into three parts: input bridge, amplification circuit and feedback circuit. The input bridge is essentially an unbalanced bridge. The thermal resistance is connected to one of the bridge arms. When the resistance value of the thermal resistance changes due to the temperature change, the bridge outputs an unbalanced voltage signal. The voltage signal passes through the amplification circuit and the feedback circuit to obtain an output current I that is a linear function of the input signal.

Performance

Power supply effect: Less than ±0.005% of range per volt.

Stability: With RTD and thermocouple input, transmitter stability will be ±0.15% of reading or ±0.15°C (whichever is greater) within 24 months.

Self-calibration:

The thermal resistance temperature transmitter analog-to-digital conversion measurement circuitry automatically self-calibrates for each updated temperature data by comparing dynamic measurements to an extremely stable and accurate internal reference.

Vibration Effects: The following specifications can be achieved with no impact on performance:

Structural Features

(1) Proficient thermal resistance: The structure and characteristics of the thermal resistance temperature sensing element (resistor body) commonly used in the industry. From the temperature measurement principle of the thermal resistance, it can be known that the change of the measured temperature is directly measured by the change of the resistance value of the thermal resistance. Therefore, the change of the resistance of various wires such as the lead wire of the thermal resistance body will affect the temperature measurement. In order to eliminate the influence of lead resistance, a three-wire or four-wire system is generally used.

(2) Armored thermal resistance: The outer diameter of the armored thermal resistance is generally φ2~φ8mm, and the minimum can reach φmm.

Packing & Delivery

Our Service

Service standards: We are committed to provide a high quality and responsive service to all clients.

OEM: Available for wave guide series.

Stable quality: implement the whole process of quality control, meticulous and strict inspection!

Reasonable price: Internal cost control, reducing expenses, benefiting customers!

Professional selection: more than 5 years of professional engineer selection, to provide you with alternative models of each factory, system solutions

Fast delivery: adequate stocking, shortened delivery time!

Door to door service: We usually send the parcel by DHL, EMS and TNT etc. The tracking number will be sent to you after delivery. It usually takes 3~5working days to reach from our side to your side, which is very convenient for your business.

Certificate

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