Pressure meter is a common measurement instruments, widely used in various fields. It can visually show the pressure changes in various processes, insight into the conditions of the product or media process to form, monitor the safety of the production process of movement, and through automatic chain or sensor device, to build a rapid and reliable security, In order to prevent accidents and protect people and property security has played an important role, known as the safety of the "eyes."

      (1) range Pressure meters installed in the boiler, pressure vessel, the maximum range (dial scale limit) should be compatible with the equipment working pressure. The pressure gauge range is generally 1.5 to 3 times the working pressure of the equipment, preferably 2 times. If the selected pressure gauge range is too large, the same accuracy of the pressure gauge, the greater the range, allowing the absolute value of error and the greater the deviation of the naked eye, it will affect the accuracy of pressure readings; the other hand, if the selected pressure gauge Range is too small, the equipment working pressure is equal to or close to the scale gauge limit, it will make the pressure gauge in the long-term deformation of the largest elastic state, easy to produce permanent deformation, causing the gauge to increase the error and reduce the service life. In addition, the pressure gauge range is too small, if over-voltage operation, the pointer over the maximum range close to zero, leaving the operator illusion, resulting in greater accidents. Therefore, the use of pressure gauge pressure range, should not exceed the scale limit of 60 to 70%.

      (2) working with the accuracy of the pressure gauge is to allow the percentage of dial gauge dial limit expressed as a percentage. Accuracy class are generally marked on the dial, the choice of pressure gauge, the pressure level should be based on equipment and the actual work to determine the accuracy.

      (3) the diameter of the dial In order for the operator to accurately see the pressure value, the pressure gauge dial diameter should not be too small, if the pressure gauge mounted higher or far from the post, dial diameter should be increased.

      (4) pressure gauge for the measurement of the medium if corrosive, then the corrosive media must be based on the specific temperature, concentration and other parameters to choose a different elastic element material, or fail to achieve the desired purpose.

      (5) daily attention to the use of maintenance, regular inspection, cleaning and make good use of records.

      (6) pressure gauge general verification cycle for six months. Compulsory certification is to ensure the technical performance of the pressure gauge reliable, accurate transmission of value, and effectively guarantee the safety of production of legal measures.

      Precautions for the Use of Seismic Pressure Gauge

      Uses

      It is widely used in mechanical oil, chemical industry, metallurgy, mine, power production, measuring the pressure of copper and copper alloy non-corrosive medium. It can be used to measure the pressure of medium, . Measure the pressure of strong corrosive medium, should be made of stainless steel materials, seismic resistant (acid, alkali, ammonia, etc.) class.

      Use and maintenance

      ⑴ instrument must be vertical: the installation should be tightened with 17mm wrench, should not be strong twist case; transport should avoid collision.

      ⑵ instrument should be used in the ambient temperature of -25 ~ 55 ℃.

      ⑶ use of the working environment vibration frequency<25HZ, the amplitude is not greater than 1mm.

      ⑷ the use of the ambient temperature is too high, the instrument does not return to the zero value indication or indication of tolerance, the upper case can be sealed

Rubber plug cut, so that the instrument cavity and the atmosphere can be connected.

      ⑸ instrument use, should be in the upper limit of 1/3 ~ 2/3 between.

      ⑹ in the measurement of corrosive media, may crystallize the medium, the viscosity of the medium should be added isolation device.

      ⑺ instruments should be regularly tested (at least once every three months), such as the failure should be promptly repaired.

      ⑻ instrument from the factory from the date of six months if found in the normal use of storage conditions for failure of quality manufacturing failure or damage by the Company responsible for repair or exchange.

      ⑼ need to measure the corrosive medium of the instrument, the order should specify the requirements.