Simple high-precision pressure transmitter verification device and implementation method thereof

Abstract

The invention discloses a simple high-precision pressure transmitter verification device. The device includes a frame, a needle type emptying valve, a finely-adjustable corrugated membrane box, a standard air pressure output interface, a standard gauge interface, a compressed air input interface, a valuator, a pressure stop valve and a three-way connector. The simple high-precision pressure transmitter verification device is characterized in that the device also includes an installation fixing hole, the needle type emptying valve, the finely-adjustable corrugated membrane box, the standard air pressure output interface, the standard pressure gauge interface, the compressed air input interface, the valuator and the pressure stop valve are arranged on the frame, when the verification device is utilized to perform verification, the standard pressure output interface is connected with a pressure transmitter to be verified, the standard pressure gauge interface is connected with a standard meter, the compressed air input interface is connected with a compressed air source, then the valuator is adjusted, so that output pressure of the valuator is appropriately higher than the upper limit of a measuring range of the pressure transmitter to be verified, through operation of opening and closing the pressure stop valve and the needle type emptying valve, a reference standard pressure gauge displays adjustment of pressure to rise or fall to near a required pressure value, and then the adjustable corrugated membrane box is adjusted, so that a display value of the standard pressure gauge is precise to the required pressure value. Due to adoption of the abovementioned technical scheme, the simple high-precision pressure transmitter verification device has the beneficial effects that using the device to perform high-precision pressure transmitter verification can effectively utilize existing standard equipment, and achieves the purpose of realizing high-precision pressure transmitter verification relatively economically.

Description

technical field [0001] The invention belongs to the field of teaching instruments and equipment, and relates to a simple and high-precision pressure transmitter calibration device and a realization method thereof. Background technique [0002] At present, there are two types of known pressure transmitter calibration devices. The first type is a combination of compressed air source, pneumatic regulator, precision pressure gauge, precision voltmeter, and precision resistance to form a corresponding pressure transmitter calibration device. system, this method mainly adjusts the size of the standard pressure with reference to the precision pressure gauge through the pneumatic regulator. This method is low in cost. Due to the limitation of the accuracy of the regulator, it is mostly used for the calibration of conventional pressure transmitters with an accuracy level lower than 1.0. The second is a comprehensive and integrated set of automatic calibration devices. The device its...

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Problems solved by technology

The second type is a comprehensive and integrated complete set of automatic calibration device. The device itself can automatically generate a standard pressure source, with high precision and convenient installation and connection, but the cost and maintenance costs are relatively high, and it is mostly used in large-scale enterprises with strong capital.

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