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Digital Pressure Gauge Precautions
- Sep 18, 2017 -

Digital pressure gauge combines the world's leading micro-processing technology and advanced analog-to-digital conversion algorithms to achieve high accuracy, low power requirements. Large-screen LCD technology, a unique background light technology, so that the data can be clearly readable at night. Using imported chips, the instrument data collection, memory, measurement to maintain the highest value, manual back to zero. Shell stainless steel sealed, corrosion-resistant, anti-vibration, can be used in a variety of complex environments.

Overview is on-line measuring instruments. It uses long-term battery power supply, no external power supply, easy to install and use. The product has passed the certification and explosion-proof certification, has been in the petroleum, chemical, power and other fields are widely used.

Digital pressure gauge high precision, high stability, error ≤ 1%, the power supply, micro power, stainless steel shell, digital pressure gauge protection rugged, beautiful and delicate.

working principle

Power supply part: (AC 220V through the switch circuit, converted to) the required DC voltage, and then by the regulator circuit to supply the required circuit, or (24V) DC voltage directly through the regulator circuit to supply the required circuit.

Signal part: the measured medium pressure, through the pressure interface to the sensor pressure sensor diaphragm, the sensor will be induced by the electrical signal amplification, V / A conversion, to the CPU for processing, set the display number, control switch output, and provide Analog or digital output to achieve the pressure display, control and transmission process.

Digital pressure gauge selection and use of precautions

Pressure gauge is a common measurement instrument, widely used in various fields. It can visually show the pressure changes in the various processes, insight into the formation of conditions in the product or media process, monitoring the production process of the safety trends, and through automatic chain or sensor device to build a fast and reliable security, In order to prevent accidents, protect the personal and property safety play an important role, known as the safety of the "eyes".

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

(2) The accuracy of working digital pressure gauges is expressed as a percentage of the allowable error to the dial scale limit. Accuracy levels are generally marked on the dial, the choice of digital pressure gauge, the pressure level should be based on the equipment and the actual work needs to determine the accuracy.

(3) Diameter of the dial In order to allow the operator to accurately see the pressure value, the digital pressure gauge dial diameter should not be too small, if the digital pressure gauge is installed higher or away from the post, dial diameter should be increased.

(4) digital pressure gauge for the measurement of the media if corrosive, it must be based on corrosive media specific temperature, concentration and other parameters to use different components of elastic materials, or fail to achieve the desired purpose.

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

(6) digital pressure gauge general test cycle for six months. Mandatory test is to protect the digital pressure gauge technical performance is reliable, the amount of accurate delivery, effective guarantee of safe production of legal measures.