What problems should be paid attention to when installing and using Banner temperature sensors

Create Date: 2024-8-30 12:03:23|Source: BANNER

1. Improper installation and introduction errors

In other words, the thermocouple should not be installed too close to the door and the heating place, and the penetration depth should be at least 8-10 times the diameter of the maintenance tube; Therefore, the gap between the thermocouple maintenance tube and the wall hole is blocked with thermal insulation materials such as refractory mud or asbestos rope to avoid the convection of hot and cold air and affect the accuracy of temperature measurement.

2. Errors introduced due to deterioration of insulation

If the thermocouple is insulated, the maintenance pipe and the cable plate are too dirty or salt, resulting in poor insulation between the thermoelectric dipole and the furnace wall, which is more serious at high temperatures, which will not only cause the loss of thermoelectric potential but also introduce disturbance, and the resulting errors can sometimes reach hundreds of degrees.

3. Errors in the introduction of thermal inertia

Due to the thermal inertness of the thermocouple, the apparent value lags behind the change in the measured temperature, which is particularly remarkable for fast measurements. Therefore, thermocouples with thinner thermoelectrodes and smaller diameter maintenance tubes should be selected as much as possible. If the temperature measurement environment is agreed, the maintenance tube can even be removed.

4. Thermal resistance error

At high temperatures, if there is a layer of soot on the maintenance pipe and dust adheres to it, the thermal resistance will increase, hindering the conduction of heat, and the temperature indication value is lower than the true value of the measured temperature. Therefore, the outside of the thermocouple maintenance tube should be kept clean to minimize errors.
What problems should be paid attention to when installing and using Banner temperature sensors




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