On-line calibration device and method for leakage detection instrument
A technology of a calibration device and a calibration method, which is applied in the field of measurement and can solve problems such as the lack of calibration devices for leak detection instruments.
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[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0022] Such as figure 1 As shown, an online calibration device for a leak detection instrument designed by the present invention, the leak detection instrument 21 suitable for the calibration device includes a container 19, a pressure gauge 18, other parts 20, etc., and the calibration device is mainly composed of a gas supply system I1, a supply Air system II14, needle valve 2, stop valve 3, 6, 8, 10, 13, 15, 17, plenum chamber 5, positive pressure standard leak hole 9, calibration chamber 12, pressure gauge I4, pressure gauge II11, air extraction Composed of system I7 and air extraction system II16; the connection relationship is:
[0023] The air supply system I1 is connected to the plenum 5 through the needle valve 2 and the shut-off valve 3 in turn to form the first air supply pipeline. The air extraction system I7 is connected to the p...
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