Calibration device and calibration method for absolute pressure transmitter
A technology of absolute pressure and calibration device, used in measuring devices, measuring fluid pressure, instruments, etc., it can solve the problem that digital pressure gauges cannot cover the vacuum pressure range, etc., and achieve stable and accurate calibration.
Pending Publication Date: 2020-08-14
DAYE SPECIAL STEEL CO LTD
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Problems solved by technology
[0005] The purpose of the present invention is to provide a calibration device and calibration method for an absolute pressure transmitter, which is used to overcome the problem that the digital pressure gauge selected as the main standard in the prior art cannot cover the medium vacuum pressure range
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[0054] The present invention will be described in detail below with reference to the accompanying drawings and examples. It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0055] In the description of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", " The orientations or positional relationships indicated by "top", "bottom", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific orientation, so they cannot be understood as Limitations on the Invention. The terms "connected" and "connected" used in the present invention should be understood in a broad sense, for example, it can be fixe...
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The invention belongs to the technical field of absolute pressure transmitters, and particularly relates to a calibration device and a calibration method of an absolute pressure transmitter. The calibration device comprises a vacuum chamber; a standard device which is communicated with the vacuum chamber through a connecting pipeline; a vacuum pump which is communicated with the vacuum chamber through an exhaust pipeline; a gas cylinder which is communicated with the vacuum chamber through a gas charging pipeline; an adapter substitute which is communicated with the vacuum chamber through a calibration pipeline and is used for connecting the vacuum chamber with an absolute pressure transmitter to be calibrated; a fine adjustment valve which is arranged on the inflation pipeline and is usedfor adjusting the flow rate of the gas in the gas cylinder filled into the vacuum chamber; a first vacuum valve which is arranged on the air exhaust pipeline and used for controlling on-off of the air exhaust pipeline; the standard device comprises a vacuum gauge and a vacuum gauge controller electrically connected with the vacuum gauge; or the standard device is a digital display vacuum gauge. According to the invention, the calibration result can be seen more visually, and the calibration of the vacuum absolute pressure transmitter in measurement is realized.
Description
technical field [0001] The invention belongs to the technical field of absolute pressure transmitters, and in particular relates to a calibration device and a calibration method for absolute pressure transmitters. Background technique [0002] The modern refining process requires the RH refining furnace to be evacuated to a medium vacuum environment for degassing treatment. Therefore, it is necessary to calibrate the measuring instruments for detecting vacuum. Generally, the optional measuring equipment at the process site is a vacuum gauge and an absolute pressure transmitter. At this stage, except for national defense metrology and the National Metrology Institute, the calibration cycle of vacuum gauges is long, and the cost of direct calibration and spare parts is high. [0003] With the upgrading of manufacturing technology, absolute pressure transmitters have gradually been able to measure medium vacuum (10 2 ~10 -1 )Pa pressure capability, but according to the nation...
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IPC IPC(8): G01L27/00
CPCG01L27/005
Inventor 黄兵周恒柯秉应邹渊伍伟韦尚锦
Owner DAYE SPECIAL STEEL CO LTD