Accurate method for verifying pressure of low-pressure instrument
A technology of instrument accuracy and pressure, applied in the field of low-pressure instrument pressure calibration, it can solve the problems of large pressure fluctuation, difficult pressure control, slow pressure increase, etc., to achieve the effect of small pressure fluctuation, easy pressure control, and rapid pressure increase
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[0021] like figure 1 As shown, the accurate method of checking low-pressure gauge pressure of the present invention comprises the following steps:
[0022] (a), connect the standard meter 1 and the meter 8 to be calibrated with the verification device respectively, and the verification device includes: a tee 2 connected in sequence, a pressure trimmer 3, a stop valve 4, a constant value device 5, a filter reducing Pressure valve 6 and pressure source 7, precision fine-tuning handle 10, fine-tuning handle 11 and pressure relief valve 12 are installed on the pressure trimmer 3, the standard meter 1 and the calibrated meter 8 are respectively connected with the two ports of the tee 2, the standard meter 1 , Calibrated meter 8, tee 2, pressure trimmer 3, stop valve 4, constant value device 5, filter pressure reducing valve 6 and pressure source 7 are connected through connecting pipe 9, which is 4mm in diameter Nylon tube;
[0023] (b), the pressure source 7 provides a rated pre...
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