Diaphragm shock resistant pressure gauge is a widely used pressure measuring instrument in the industrial field, especially suitable for measuring media with corrosiveness, high viscosity, or containing solid particles. However, during use, some common problems may be encountered, such as pointer jumping, reading deviation, and membrane leakage. These issues not only affect the accuracy of measurements, but may also lead to equipment malfunctions. This article will provide a detailed introduction to the troubleshooting methods and problem-solving techniques for these issues, helping users quickly restore the normal operation of their devices.

1、 Pointer jumping: the key to ensuring measurement stability

Pointer jumping refers to the unstable oscillation of the pressure gauge pointer during the measurement process. This phenomenon may be caused by various factors, including medium fluctuations, pressure pulses, or internal instrument malfunctions.

（1） Troubleshooting methods

Check for medium fluctuations

Firstly, check if the pressure of the tested medium is stable. If there is fluctuation in the medium pressure itself, it may cause the pointer to jump. This can be confirmed by observing the pressure source or installing a buffer device.

Check the pressure pulse

Pressure pulses may also cause pointer jumping. Check whether there are quick opening/closing valves or pump start/stop operations in the pipeline system, which may cause pressure pulses.

Check the installation of instruments

Ensure that the pressure gauge is securely installed without looseness or vibration. Loose installation may cause the instrument to be affected by external vibrations, resulting in pointer jumping.

（2） Solution skills

Install buffer device

If the medium pressure fluctuates greatly, a buffer device such as an airbag buffer can be installed in front of the pressure gauge to reduce the impact of pressure fluctuations on the pointer.

Adjust installation position

Ensure that the pressure gauge is installed in a location away from the vibration source. If vibration cannot be avoided, seismic resistant pressure gauges can be considered, whose internal design can effectively reduce the impact of vibration on the pointer.

Check the interior of the instrument panel

If the pointer continues to bounce, it may be due to loose or damaged mechanical components inside the instrument. At this point, the pressure gauge should be disassembled for inspection, and damaged components should be replaced if necessary.

2、 Indication deviation: the key to ensuring measurement accuracy

Indication deviation refers to the deviation between the reading of the pressure gauge and the actual pressure value exceeding the allowable range. This may be caused by improper instrument calibration, environmental temperature changes, or mechanical component wear.

（1） Troubleshooting methods

Check calibration status

Firstly, confirm whether the pressure gauge is within the most recent calibration cycle. If the calibration time is too long, it may cause a deviation in the displayed value. The pressure gauge can be calibrated and checked using a standard pressure source.

Check the ambient temperature

Changes in ambient temperature may affect the reading of the pressure gauge. Ensure that the pressure gauge is used within the specified temperature range and avoid drastic temperature changes as much as possible.

Inspect mechanical components

Check the mechanical components of the pressure gauge, such as pointers, gears, and springs, for wear or deformation. The damage to these components may result in inaccurate readings.

（2） Solution skills

recalibrate

If the reading of the pressure gauge exceeds the tolerance, it should be recalibrated immediately. Use a high-precision pressure calibrator to calibrate the pressure gauge according to standard procedures to ensure accurate readings.

temperature compensation

If the ambient temperature changes significantly, it is possible to consider using a pressure gauge with temperature compensation function to reduce the impact of temperature on the reading.

Replace parts

If mechanical components are damaged, they should be replaced in a timely manner. Select high-quality replacement parts and ensure proper installation to restore the accuracy of the pressure gauge.

3、 Membrane leakage: key to ensuring safe operation of equipment

Diaphragm leakage refers to the leakage of the diaphragm part of a pressure gauge, causing the medium to seep into the interior of the instrument. This not only affects the accuracy of the measurement, but may also lead to equipment damage or medium leakage, causing safety issues.

（1） Troubleshooting methods

Check for signs of leakage

Check if there are any signs of leakage in the diaphragm part of the pressure gauge, such as liquid leakage or gas leakage. Soap water can be used for leak detection to observe whether bubbles are generated.

Check the condition of the medium

Confirm whether the tested medium is corrosive or contains solid particles. These media may cause damage to the diaphragm, leading to leakage.

Check the installation seal

Check if the installation seal of the pressure gauge is intact. If not properly sealed, it may cause medium leakage and affect the service life of the diaphragm.

（2） Solution skills

Replace the diaphragm

If the diaphragm leaks, it should be replaced immediately. Choose diaphragm materials compatible with the medium and ensure proper installation to prevent further leakage.

Cleaning media

If the medium contains solid particles, filters should be installed or the medium should be cleaned regularly to reduce wear on the diaphragm.

Check the installation seal

Ensure that the installation seal of the pressure gauge is intact and undamaged. If the seal is damaged, it should be replaced in a timely manner and the pressure gauge should be reinstalled to ensure sealing.

4、 Summary

Diaphragm shock resistant pressure gauges play an important role in industrial applications, but they may encounter problems such as pointer jumping, reading deviation, and diaphragm leakage during use. By properly investigating and resolving these issues, the measurement accuracy and operational stability of pressure gauges can be effectively improved. Users should regularly maintain and calibrate the pressure gauge to ensure that it operates in optimal condition. At the same time, choosing high-quality equipment and accessories can reduce the occurrence of failures and extend the service life of the equipment. Through these measures, it can be ensured that the diaphragm shock resistant pressure gauge can provide reliable measurement results under various complex working conditions, ensuring the smooth progress of industrial production.