Digital pressure testers

Abstract

The invention discloses a digital pressure checking meter, comprising a shell. The lower part of the shell is provided with a pressure sealing connector, and one end of the pressure sealing connector positioned inside the shell is connected with a pressure sensor. The power supply end of the pressure sensor is connected with an excitation power supply. The output end of the pressure sensor is connected with a signal measuring cell, and the output end of the signal measuring cell is connected with a micro controller which is connected with the excitation power supply to control an outputted excitation signal of the excitation power supply. The shell is also internally provided with a pressure switch signal input terminal and an electric signal input terminal, wherein, the pressure switch signal input terminal is connected with the micro controller directly; and the electric signal input terminal is connected with the signal measuring cell. As the invention is provided with the electric signal input terminal, the pressure switch signal input terminal and a 24V power supply output terminal, the invention enriches and improves the functions of checking and measuring. The invention can be used for the check and measure in filed pressure gauge, pressure transmitter, pressure switch and pressure controller.

Description

technical field [0001] The invention relates to the field of instruments and meters, in particular to a pressure calibration and detection function and an electric signal detection function, which can not only calibrate and detect pressure instruments, pressure transmitters and pressure sensors, but also calibrate and detect pressure switches, pressure Digital pressure calibrator for the controller. Background technique [0002] At present, in the field of pressure testing technology in various industries, on-site pressure testing instruments are divided into pointer precision pressure gauges, digital precision pressure gauges, digital pressure gauges and digital pressure calibrators. [0003] The pointer type precision pressure gauge has the characteristics of cheap, intuitive reading, and no power supply, and is mostly used for calibrating and testing working pressure gauges. However, there are problems such as poor anti-vibration performance, difficult to read when vibra...

AI Technical Summary

Problems solved by technology

However, it lacks the electrical signal measurement function, so it cannot be used exclusively as a digital pressure calibrator

At present, there is no micro-power digital pressure calibrator, which not only has the function of pressure calibration and detection, but also has the function of electrical signal detection. It can not only calibrate and detect pressure instruments, pressure transmitters and pressure sensors, but also calibrate and detect pressure switches. ,pressure controller

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