Observe whether the measurement value of the pneumatic probe at different positions of the workpiece is the same as the tolerance distribution of the workpiece to judge whether the pneumatic probe is worn. That is to say, for a probe with a pair of test holes, the airflow characteristics of the two test holes should be the same, that is, to balance. When measuring any position of the workpiece, if the air flow of one porosity decreases, the air flow of the other porosity should be proportional to the corresponding increase of the diameter of the two measuring holes and the flow channel should be the same, the balance is the same, and the two measuring holes should be distributed on the center line of the probe, that is, the center symmetry. The offset of the balance and center symmetry of the measuring instrument will cause the pulsation of the measured value during the pneumatic measurement, that is, the so-called total pulsation error, and the error represents the wear of the measuring head of the gas momentum instrument. When the measuring head is worn to the relative situation, it is recommended to scrap when the error is greater than a quarter of the tolerance of the measured part; Or when the gas meter magnification knob cannot be turned when debugging the instrument, it also indicates that the service life of the probe will be exhausted.

    As a precision parts size pneumatic measurement equipment manufacturer, we have19+Years design experience engineer, can provide a variety of measurement solutions, the production of pneumatic probe using German imported steel, to ensure the real material, through the original salt bath heat treatment, high temperature1500°Quench, wear proof, liquid nitrogen-180°Deep cooling to remove internal stress, prevent deformation, manual grinding, ensure micron accuracy.

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