Bourdon tube pressure gauge calibration and adjustment is a must to know!

People often use instrument will know, both in the thermometer and pressure gauge in the process of using to inspection and maintenance, for example, commonly used bourdon tube pressure gauges, as the growth of the use of time, the elastic properties of elastic element will change, resulting in residual deformation; Drive in the instrument will wear over time, these factors will be to gradually reduce the accuracy of the instrument. Therefore, must be regularly for efficacy and adjusting instrument. Bourdon tube pressure gauge calibration, generally USES & other; The standard comparison method & throughout; 。 Even if school standard table and table under the same pressure, compare their indicated value, whether it is comply with the provisions of the manufacturer and the identification is the main technique index sign of the correction table. 1, usually selected standard pressure gauge should satisfy: (two points 1) Selection of measurement limit should be calibrated tables are more than a recent series of 1/3 of the upper limit value of the measured value, usually choose big level series table. （ 2) Allow the absolute error should be less than 1/3 of the absolute error of timing allows. Check industrial bourdon tube pressure gauges, usually used in the equipment has a pressure gauge validators, and piston type pressure gauge. 2, the main technical requirements: (check 1) The fundamental error of said value should not be more than allowed by the instrument precision grade error value. （ 2) Instrument variation should not be more than the basic allows the absolute value of error. （ 3) Within the scope of the instructions, pointer should be smooth and deflection in any position, the distance of the pointer and dial shall not be less than 1 mm. （ 4) With handle gently knock watchcase, pointer value changes of basic permissible error should not exceed 50%. （ 5) When the instrument is in vertical position, and the effects of spring tube without pressure, we have a limit nailed the instrument should be close to the limit. Above is the pressure gauge regulations, standards and technical requirements, we are in the process of using a pressure gauge to regularly to check and adjustment of pressure gauge, so as not to cause trouble to our work!