Failure modes of armored thermocouples

The ceramic pores of armored thermocouples will become ineffective if the components are blocked. The method of electrostatic precipitator is often used for disposal, but the consequences are not realistic and cannot be applied in flammable and explosive situations. It can accurately and quickly reflect the actual temperature of the measured end face, and is practical for measuring the end face temperature of shaft bearings and other components.

It is not only widely used in industrial temperature measurement, but also made into a scale benchmark instrument. It has accompanying performance instruments available for selection.

Non scale thermocouples do not overlap with scale thermocouples in terms of application scope or numerical order, and some have different scale tables. They are important for measurement in certain special places.

The thermoelectric potential is associated with the temperature at the task end as a single valued function. The calibration tables related to the temperature and thermoelectric potential of various thermocouples are made when the cold end temperature is zero, and special compensating wires are used to extend the cold end.

The important forms of failure of armored thermocouples are wire breakage and thermocouple breakage caused by vibration, and thermocouple short circuit or disconnection caused by bending.

The characteristic of armored thermocouples is that they are formed by installing a flat coil, a pair of calibrated armored thermocouples, and temperature control performance outputs.

First, pull out the two calibration thermocouples from both ends of the coil, causing the armored thermocouples to engage in a battle at the hot end. Through this process, change the position of the calibration thermocouples in the coil, so that the thermoelectric potential of the two calibration thermocouples is similar.

Replace one of the calibration thermocouples with the measured speed thermocouple, and compare the thermoelectric potential value under stable conditions with the thermoelectric potential of the calibration thermocouple to determine the degree of the measured speed armored thermocouple.