How to deal with the failure of the debug differential pressure transmitter without output

We all know that the application of differential pressure transmitter is very extensive. Generally, it is used to prevent the medium in the pipeline from directly entering the transmitter, and the capillary tube and the transmitter are connected by the fluid-filled capillary tube. . It is used to measure the level, flow and pressure of liquids, gases or vapors, and then convert it into a 4-20mADC signal output. However, even if the perfect product is faulty, the main content of this article is about how to make adjustments when the differential pressure transmitter has no output. Why do you think of this failure, because the transmitter's no-output condition is very common, not to say that the quality is low, but because of the following reasons.

1. Check whether the differential pressure transmitter's power supply is reversed, and whether the positive and negative power supply is connected correctly.

2. Measure the power supply of the transmitter. Is there a 24V DC voltage? Ensure that the power supply voltage to the transmitter is ≥12V (ie, the voltage at the input of the transmitter power supply is ≥12V). If there is no power, check whether the circuit is broken, whether the instrument is selected wrongly (input impedance should be ≤ 250Ω) and so on.

3, if the pressure transmitter is with a header, you need to check whether the header is damaged (you can short the first two lines of the header, if the short circuit is normal, then the header is damaged), if the header is damaged, You need to change the header.

4. If there is a problem with the differential pressure transmitter, connect the current meter to the 24V power supply circuit to check if the current is normal. If it is normal, the transmitter is normal. At this time, check whether other instruments in the loop are normal.

5. If the power supply is connected to the transmitter power input, connect the power cable to the power port.

Differential Pressure Transmitter Pressure Transmitter The steps for no output debugging are basically the above situations. Of course, in practical applications, there may be many problems causing the differential pressure transmitter to not work properly. Before installation and use, it is recommended that everyone should seriously take the trouble.

Reproduced from: Gold Lake Sanchang Automatic Control Equipment Co., Ltd. Original site. Copyright still belongs to Jinhu Sanchang Automatic Control Equipment Co., Ltd., please indicate the source.

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