On site induced draft fan vibration measurement sensor JMB35/E integrated

pressuretransmitterVarious faults are inevitable during use, and there are many influencing factors. For example, there may be leakage of filling fluid between the diaphragm and sensing components in the pressure transmitter, zero and range offset, unstable output, etc., which can lead to a decrease in the accuracy of the pressure transmitter or even damage; Weather factors can also have an impact on the transmitter, such as lightning strikes that can damage the circuitry of the transmitter enclosure and cause it to malfunctioncommunicationA humid environment can damage the circuit; Improper selection of transmitter range can cause irreversible deformation of pressure sensing components. Here are several common types of faults:

1. Line malfunction

When a line fault occurs and the computer displays abnormal values, open the transmitter junction box and check for any virtual, short, or disconnected connections in the line. Then, use a measuring tool to detect any issuespower supplyShake insulation and quantityresistanceWait for methods to troubleshoot.

2. Frequency conversion interference

When wiring, there are various methodssignalInterference between lines, especially when power and signal lines are connected in series in the same pipeline, can cause more severe interference. In this case, it may cause the transmitter to not communicate or even result in errors; This type of incorrect operation can be avoided by increasing the distance between the instrument cable and the power cable tray.

3. Pressure pipe malfunction

There are usually three types of faults in the pressure pipe: pressure pipe blockage, pressure pipe leakage, and pressure pipe accumulation:

(1) Pressure blockage is generally caused by delayed discharge or dirty or sticky media;

(2) The leakage of the pressure pipe is caused by the presence of many accessories such as transmitters connected to electricity and shut-off valves, which increase the leakage point;

(3) The accumulation of liquid in the pressure tube is usually caused by an unreasonable gas pressure measurement method or incorrect installation of the pressure tube, which can affect the measurement accuracy.

4. Electrical signal transmission failure

Improper use or maintenance of pressure transmitters can easily lead to transmission failures of electrical signals. For example, in order to save space, placing the transmitter near the device under test may cause signal transmission distance to be too far, resulting in interference or attenuation of the signal. In this case, the cross-sectional area of the cable should be increased as needed.