Capacitive domestic pressure transmitter LFJ-YL6XPT, LFJ-YL6XF

[Overview]

Adopting imported original diffusion silicon pressure sensors, the diffusion silicon pressure sensor is an integrated all stainless steel structure with a built-in processing circuit that converts the sensor's millivolt signal into standard voltage, current, and frequency signals for output. It can be directly connected to computers, control instruments, etc. and can be used for a long time in harsh environments.

【 Working Principle 】

The pressure of the measured medium is directly applied to the diaphragm of the sensor (stainless steel or ceramic), causing the diaphragm to produce a micro displacement proportional to the pressure of the medium, resulting in a change in the resistance value of the sensor. This change is detected by electronic circuits and converted into a standard measurement signal corresponding to this pressure.

Capacitive domestic pressure transmitter LFJ-YL6XPT, LFJ-YL6XF

[Features]

High strength stainless steel exterior structure

High precision, impact resistance, vibration resistance

Strong anti-interference ability and good long-term stability

[Common Malfunctions]

1. During installation, the axial direction of the pressure sensitive part of the transmitter shall be perpendicular to the gravity direction. If the installation conditions are limited, the zero position of the transmitter shall be adjusted to the standard value after installation and fixation.

2. The residual pressure cannot be released, so the zero position of the sensor cannot be lowered. The best way to eliminate this cause is to remove the sensor and directly check if the zero position is normal. If the zero position is normal, replace the sealing ring and try again.

3. The output of the pressure transmitter does not change, and if the output of the pressure transmitter suddenly changes, the zero position of the pressure relief transmitter cannot return. The most likely cause of this phenomenon is the sealing ring of the pressure sensor.

4. Whether it meets the power supply requirements; Is there any wiring error between the power supply, transmitter, and load equipment. If there is no voltage or the polarity is reversed on the wiring terminals of the transmitter, it can cause the transmitter to output no voltage signal.

5. The casing of pressure sensors and transmitters generally needs to be grounded, and signal cables should not be mixed with power cables. Strong electromagnetic interference should be avoided around sensors and transmitters. Sensors and transmitters should be periodically calibrated according to industry regulations during use.

6. When selecting pressure sensors and transmitters, users should fully understand the working conditions of the pressure measurement system, make reasonable choices according to their needs, so that the system can work in the best state and reduce project costs.

7. Transfer the filling liquid inside the isolation sheet and component to both sides of the measuring membrane. Measure the electrodes on both sides of the diaphragm and insulating film to form a capacitor.

8. The pressure transmitter is required to be inspected once a week and once a month, mainly to remove dust from the instrument. Electrical components should be carefully checked, and the output current value should be regularly calibrated. The pressure transmitter has weak electricity inside and must be isolated from external strong electricity.

Capacitive domestic pressure transmitter LFJ-YL6XPT, LFJ-YL6XF