Digital pressure gauges are online measuring instruments. It uses long-term battery power supply, no external power supply, easy installation and use. The product passed the measurement certification and explosion-proof certification, and has been widely used in petroleum, chemical, electric power and other fields. Pressure gauges are common measuring instruments. They can visually show pressure changes in various process steps, provide insight into the formation of conditions in the product or medium flow, monitor the safety movements during production and operation, and pass automatic interlocking or sensing devices. A fast and reliable security system was constructed. It played an important role in preventing accidents and ensuring the safety of people and property. It was called the "eyes of safety."
Digital pressure gauge selection and use Note 1. Digital pressure gauge installed on the boiler, pressure vessel, the maximum range (scale limit value on the dial) should be compatible with the working pressure of the equipment. The range of digital pressure gauges is generally 1.5 to 3 times the working pressure of the equipment, preferably 2 times. If the digital pressure gauge selected is too large, due to the same precision digital pressure gauge, the larger the range, the greater the absolute value of the allowable error and the deviation from the naked eye observation will affect the accuracy of the pressure reading; If the digital pressure gauge is too small, and the working pressure of the equipment is equal to or close to the scale limit of the digital pressure gauge, the elastic elements in the digital pressure gauge will be in the longest deformation state for a long time, and permanent deformation will occur, causing an increase in the error of the digital pressure gauge. Large and reduced service life. In addition, the scale of the digital pressure gauge is too small. In case of overpressure operation, the pointer will cross the maximum range close to zero, causing the operator to have the illusion and cause a greater accident. Therefore, the pressure range of the digital pressure gauge should not exceed 60 to 70% of the scale limit.
2. The accuracy of the digital pressure gauge for work is expressed in terms of the allowable error as a percentage of the dial scale limit. Accuracy grades are generally marked on the dial. When selecting a digital pressure gauge, the accuracy should be determined according to the pressure level of the equipment and the actual work requirements.
3. Dial diameter In order for the operator to accurately see the pressure value, the diameter of the dial of the digital pressure gauge should not be too small. If the digital pressure gauge is mounted higher or farther from the post, the diameter of the dial should increase. 4. If the medium used for measuring the digital pressure gauge is corrosive, different elastic component materials must be selected according to the specific temperature, concentration, and other parameters of the corrosive medium, otherwise the intended purpose may not be achieved.
5. Pay attention to the use of daily maintenance, regular inspections, cleaning and use records.
6. The digital pressure gauge has a general verification period of six months. Mandatory testing is a legal measure to ensure that the technical performance of digital pressure gauges is reliable, that the value is transmitted accurately and that production safety is effectively guaranteed.
Digital pressure gauge selection and use Note 1. Digital pressure gauge installed on the boiler, pressure vessel, the maximum range (scale limit value on the dial) should be compatible with the working pressure of the equipment. The range of digital pressure gauges is generally 1.5 to 3 times the working pressure of the equipment, preferably 2 times. If the digital pressure gauge selected is too large, due to the same precision digital pressure gauge, the larger the range, the greater the absolute value of the allowable error and the deviation from the naked eye observation will affect the accuracy of the pressure reading; If the digital pressure gauge is too small, and the working pressure of the equipment is equal to or close to the scale limit of the digital pressure gauge, the elastic elements in the digital pressure gauge will be in the longest deformation state for a long time, and permanent deformation will occur, causing an increase in the error of the digital pressure gauge. Large and reduced service life. In addition, the scale of the digital pressure gauge is too small. In case of overpressure operation, the pointer will cross the maximum range close to zero, causing the operator to have the illusion and cause a greater accident. Therefore, the pressure range of the digital pressure gauge should not exceed 60 to 70% of the scale limit.
2. The accuracy of the digital pressure gauge for work is expressed in terms of the allowable error as a percentage of the dial scale limit. Accuracy grades are generally marked on the dial. When selecting a digital pressure gauge, the accuracy should be determined according to the pressure level of the equipment and the actual work requirements.
3. Dial diameter In order for the operator to accurately see the pressure value, the diameter of the dial of the digital pressure gauge should not be too small. If the digital pressure gauge is mounted higher or farther from the post, the diameter of the dial should increase. 4. If the medium used for measuring the digital pressure gauge is corrosive, different elastic component materials must be selected according to the specific temperature, concentration, and other parameters of the corrosive medium, otherwise the intended purpose may not be achieved.
5. Pay attention to the use of daily maintenance, regular inspections, cleaning and use records.
6. The digital pressure gauge has a general verification period of six months. Mandatory testing is a legal measure to ensure that the technical performance of digital pressure gauges is reliable, that the value is transmitted accurately and that production safety is effectively guaranteed.
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