Armored thermal resistance wiring length

Project Overview

　　Armored thermistor, as a commonly used temperature sensor, plays a crucial role in industrial production and scientific research. Its measurement accuracy and stability directly affect the performance and safety of the entire system. As one of the important factors affecting the measurement accuracy of armored thermal resistance, the length of the wiring needs to be given sufficient attention in practical applications. This article will explore in detail the influencing factors, calculation methods, and precautions of the wiring length of armored thermal resistors, in order to provide reference for relevant technical personnel.

　　1、 Factors affecting the wiring length of armored thermal resistors

　　The wiring length of armored thermal resistors is mainly affected by the following factors:

　　1.1 Material and specifications of wire

　　Different wire materials have different electrical resistivity, and the smaller the wire diameter, the greater the resistance. Therefore, when selecting wires, wires with lower resistivity and larger diameter should be chosen according to the actual situation to reduce voltage drop on the line.

　　1.2 Environmental temperature

　　Changes in environmental temperature can cause variations in wire resistance, thereby affecting measurement accuracy. Therefore, when selecting wires, the range of environmental temperature changes should be considered, and wires with smaller temperature coefficients should be chosen.

　　1.3 Interference signal

　　In industrial sites, there are various types of electromagnetic interference that can couple into measurement circuits through wires, affecting measurement accuracy. Therefore, it is advisable to choose wires with good shielding performance and take corresponding anti-interference measures.

　　2、 Calculation method for wiring length of armored thermal resistance

　　The calculation of the length of armored thermal resistance wiring needs to consider the voltage drop and power loss on the line to ensure measurement accuracy and system stability.

　　2.1 Voltage drop calculation

　　The voltage drop on the line can be calculated using the following formula:

　　ΔU = 2 × I × L × ρ / S

　　Among them:

　　Δ U is the voltage drop on the line (V), I is the line current (A), L is the length of a single wire (m), ρ is the resistivity of the wire material (Ω· mm ²/m), S is the cross-sectional area of the wire (mm ²), and 2.2 is the power loss calculation

　　The power loss on the line can be calculated using the following formula:

　　P = I² × R = I² × ρ × 2L / S

　　Among them:

　　P is the power loss on the line (W), I is the line current (A), R is the line resistance (Ω), ρ is the resistivity of the wire material (Ω· mm ²/m), L is the length of a single wire (m), S is the cross-sectional area of the wire (mm ²), 2.3 is the allowable wiring length calculation

　　In practical applications, the wiring length of armored thermal resistors needs to be determined based on the allowable voltage drop or power loss.

　　3、 Precautions for wiring armored thermal resistors

　　When wiring armored thermal resistors, the following points should be noted:

　　3.1 Choose the appropriate wire

　　Wires with low resistivity, large diameter, low temperature coefficient, and good shielding performance should be selected according to the actual situation.

　　3.2 Correctly Connect Wires

　　The connection should be strictly made according to the wiring diagram to ensure reliable connection and avoid virtual connection and poor contact.

　　3.3 Proper insulation treatment

　　To prevent leakage and short circuit, insulation treatment should be done for the wires, especially in high temperature and high humidity environments.

　　3.4 Regular Inspection

　　Regularly check the wiring status and promptly address any issues to ensure the normal operation of the system.

　　4、 Conclusion

　　The wiring length of armored thermal resistance is one of the important factors affecting its measurement accuracy. In practical applications, appropriate wires and wiring methods should be selected according to specific situations, and relevant calculations and protective measures should be taken to ensure the accuracy and stability of the system.