The temperature transmitter technology has become very mature and is very common in various factories. Temperature transmitters are often used in conjunction with some instruments, and there are often some minor malfunctions during the matching process. The common faults and their solutions are as follows.

Firstly, when the temperature of the measured medium increases or decreases, the output of the transmitter does not change. This situation is mostly due to the sealing of the temperature transmitter, which may be caused by the temperature transmitter not being sealed properly or accidentally welding a small hole in the sensor during welding. This situation usually requires replacing the transmitter housing to solve.

Secondly, the output signal is unstable, which is due to the temperature source capability. The temperature source capability is an unstable temperature, and if the instrument display is unstable, it is due to the weak anti-interference ability of the instrument.

Thirdly, the output error of the transmitter is large, and there are many reasons for this situation. It may be due to the incorrect resistance wire of the selected temperature transmitter, which leads to range errors, or it may be due to the transmitter not being calibrated properly when it leaves the factory.

troubleshooting

1. Errors occur due to leakage or blockage of the three valve group of the temperature transmitter.

2. The zero position of the temperature transmitter is too high (or too low), causing the static and differential pressure values to be larger (or smaller), resulting in the calculated gas volume being larger (or smaller) than the actual gas volume.

3. The accuracy level and range selection of the temperature transmitter are incorrect, or the selection is not in accordance with the requirements of GB/T18603-2001 "Technical Requirements for Natural Gas Metering Systems", resulting in additional measurement errors.

Solution to Error

1. Regularly conduct drain and leak checks on temperature transmitters.

2. Regularly conduct zero check on temperature transmitters, and if any abnormalities or deviations are found, they should be calibrated in a timely manner and verified upon expiration.

3. Strictly follow the requirements of GB/T18603-2001 "Technical Requirements for Natural Gas Metering Systems" for selection and installation.

4. The temperature drops in winter, especially with an increase in the water content of associated gas in oil fields, which can lead to freezing and blockage. Therefore, it is necessary to increase the frequency of sewage discharge and install insulation equipment (such as insulation boxes and heat tracing belts) on temperature transmitters.