What exactly is the reason that affects the common faults and analyzable reasons of temperature instruments

What is the reason that affects some common faults that occur in temperature instruments? Faced with the potential problems that may arise, the editor has summarized the following details. Next, let's follow the editor's footsteps and take a look at what are there? I hope it can be helpful to everyone:

In the daily operation and management process of petrochemical enterprises, temperature instruments are one of the common instruments. When a temperature instrument malfunctions, its malfunction usually manifests as a sudden increase or decrease in indication, or the reading speed of the indicated numbers is very slow or shows a significant fluctuation phenomenon when the instrument indicates numbers.

(1) Temperature instrument has indication fault

When there is a sudden increase or decrease in the indication of the temperature instrument, the main reason is that the temperature instrument indication has amplifier failure, or there is a problem of broken wires in the thermocouple, compensation wire, and thermal resistor in the instrument control system. If the temperature instrument indication is relatively slow or frequently fluctuates significantly, it is due to the actual operation process, The operation of the staff or the performance of the instrument itself may cause this malfunction, which is relatively easy to eliminate. The rapid fluctuation speed of temperature instrument indication is due to the improper PID parameters set by the temperature instrument when used internally in the control system. Only by resetting the parameters can control the automation instrument.

(2) Temperature control issues with temperature instruments

During the temperature control process of automated instruments, the main problem with temperature control is the instability of small values . This is due to the malfunction of both thermal resistors and thermocouples inside the instrument, which leads to the occurrence of this fault. The reason for unstable readings may also be due to improper use of operating techniques and poor operational ability by staff during the operation process, leading to the occurrence of faults. To this end, it is also necessary to improve the overall quality of the staff during operation. When using a temperature instrument, it is necessary to consider the temperature changes during use, which is one of the important factors in monitoring the quality of the instrument. As a staff member, it is necessary to track temperature changes in a timely manner, analyze the specific situation, and make modifications and resets as soon as possible.

(3) The inherent data measurement lag in instrument measurement

In the process of detecting faults in automated temperature control instruments, if the occurrence of faults is similar to the indication or measurement of temperature control instruments, system instruments, etc., then the frequency of data measurement lag issues inherent in instrument measurement will be relatively high. If there is a problem with the control system itself during the use of temperature instruments, it will also make the reading lag phenomenon more obvious in the temperature instrument system measurement, and even cause the reading value of automated temperature instruments to suddenly or small. What needs to be done at this stage is to check for thermal resistance, thermocouple compensation wire breakage, or analyze issues with amplifier and transmitter insensitivity, all of which are the reasons for temperature instrument failures.

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