Integrated fan vibration speed transmitter HDYD232

pressuretransmitterIt is a method of converting pressure into aerodynamicssignalA device that uses electric signals for control and remote transmission.

It can measure the pressure elementsensorPerceived physical pressure of gases, liquids, etcparameterConvert into standard electrical signals (such as 4-20mA)DCTo supply secondary instruments such as indicator alarms, recorders, and regulators for measurement, indication, and process adjustment.

Selection rules for pressure transmitters

Choosing a suitable pressure transmitter requires consideration of the following key factors:

1. Properties of the tested medium: If the tested medium has characteristics such as high viscosity, easy crystallization, and strong corrosiveness, an isolated transmitter should be selected, and its good sealing and anti-corrosion performance should be ensured. At the same time, it is necessary to consider the corrosiveness of the tested medium on the membrane and metal materials to ensure the selection of suitable membrane box materials.

2. Range of pressure measurement: It is necessary to determine the value of pressure measured in the system and select a transmitter with a pressure range that is about 1.5 times larger than the ratio. This can avoid damage to the sensor caused by pressure fluctuations or momentary peak pressure.

3. Accuracy requirements: The required accuracy level needs to be considered, and factors such as nonlinearity, hysteresis, non repeatability, temperature, zero offset scale, etc. can all affect accuracy. At the same time, it is also necessary to consider whether temperature compensation is needed to reduce the impact of temperature on the measurement results.

4. Requirements for output signal: It is necessary to determine the required output signal type, such as mV, V, mA, and frequency. At the same time, it is necessary to consider the transmitter and systemcontrollerOr the distance between displays, as well as the presence of "noise" or other electronic interference signals.

5. Operating temperature range: It is necessary to determine the operating temperature range of the equipment to ensure that the transmitter can operate at the appropriate temperature.

6. Convenience of installation and maintenance: It is necessary to consider the installation method of the transmitter and whether it is easy to maintain. For systems that require long-term stable operation, transmitters with good stability and low failure rates should be selected.

7. Economy: On the premise of meeting performance requirements, transmitters with lower prices should be selected as much as possible, while considering their service life andrepairCost.

Fault analysis and solution of pressure transmitter

Pressure transmitter is a common typepressure sensorWidely used in various fieldsindustrydomain However, due to various reasons, pressure transmitters may malfunction. This article will analyze the common faults of pressure transmitters and their solutions.

1、 No output

1. Cause analysis: No output may be due to damaged sensor diaphragm, open circuit between sensor and transmitterpower supplyCaused by no output, transmitter no output, etc.

2. Solution: Check if the sensor diaphragm is damaged, and replace it if it is damaged; Check if the circuit between the sensor and the transmitter is open, if it is open, it needs to be reconnected; Check if the power supply is normal, if not, replace itpower moduleCheck if the transmitter is functioning properly, and replace it if it is not functioning properly.

2、 Output nonlinearity

1. Cause analysis: The output nonlinearity may be due to deformation of the sensor diaphragmamplifierCaused by gain changes, temperature effects, etc.

2. Solution: Check if the sensor diaphragm is deformed, and replace it if it is deformed; Check if the amplifier gain has changed, and adjust it if necessary; Perform temperature compensation on the transmitter.

3、 Excessive error

1. Cause analysis: Excessive error may be caused by damage to the sensor diaphragm, changes in ambient temperature, improper installation, etc.

2. Solution: Check if the sensor diaphragm is damaged, and replace it if it is damaged; Check if the ambient temperature has changed, and if so, recalibrate; Check if the installation is correct, if not, reinstall.

4、 Zero drift

1. Cause analysis: Zero drift may be caused by aging sensor membranes, aging amplifier circuit components, environmental temperature changes, etc.

2. Solution: Aging treatment of sensor membrane; Check whether the amplifier circuit components are aging, and replace them if they are aging; Perform temperature compensation on the transmitter.

5、 Exceeding the range

1. Cause analysis: Exceeding the range may be caused by measuring pressure beyond the range.

2. Solution: Check if the measured pressure exceeds the range. If it exceeds the range, adjust the measured pressure or replace the appropriate pressure transmitter.

VIinterfaceleak

1. Cause analysis: Interface leakage may be caused by poor sealing at the interface, pressure fluctuations in the pipeline, and other reasons.

2. Solution: Check if the sealing at the interface is good. If it is poor, replace the sealing ring or reinstall it; Reduce pressure fluctuations inside the pipeline to ensure good sealing at the interface.

7、 Power failure

1. Cause analysis: Power failure may be caused by low or high power supply voltage, poor contact of power cord, and other reasons.

2. Solution: Check if the power supply voltage is within the normal range, and adjust it if not; Check if the power cord is in good contact, and if it is not, rewire it.

In summary, the fault analysis and solutions for pressure transmitters mainly include no output, non-linear output, excessive error, zero drift, out of range, interface leakage, and power failure. Corresponding solutions need to be taken for different faults. In daily use, pressure transmitters should be regularly inspected and maintained to ensure their normal operation and extend their service life. Meanwhile, selecting the appropriate pressure transmitter and installing it correctly is also an important measure to avoid malfunctions.