Pointer type differential pressure gauge calibration device

Abstract

The invention discloses a pointer type micro differential pressure gauge calibration device, which comprises a substrate, and a shell, a pressure equalizing mechanism, a diaphragm capsule, a screw rod and a driving mechanism which are arranged on the substrate, the shell is provided with a gas guide hole, the gas guide hole is connected and communicated with the input end of the pressure equalizing mechanism, and two output ends of the pressure equalizing mechanism are respectively connected with an etalon connector and a calibrated meter connector; the diaphragm capsule is arranged in the shell, the interior of the diaphragm capsule is connected and communicated with the air guide hole, and the exterior of the diaphragm capsule is connected with the screw rod; the driving mechanism is connected with the lead screw and used for driving the lead screw to translate, and translation of the lead screw is used for driving the diaphragm capsule to generate differential pressure change; and therefore, the pressure change is simultaneously transmitted to the pressure sensing elements of the pointer type differential pressure gauge and the standard device through the pressure equalizing mechanism, so that the indicating values of the pointer type differential pressure gauge and the standard device are simultaneously changed, the calibration efficiency of the pointer type differential pressure gauge is greatly improved, the uncertainty of an indicating value error calibration result is reduced, and the problem that an existing pointer type differential pressure gauge is large in calibration error is practically solved.

Description

technical field [0001] The invention relates to the technical field of instrument calibration, in particular to a pointer type differential pressure gauge calibration device. Background technique [0002] The pointer differential pressure gauge is a special instrument for the medical and health industry. It can be used to measure the positive and negative pressure difference in the clean room of the pharmaceutical factory and the electronics factory, and the clean workshop. Room special meter, used for detection of pressure difference of clean air conditioning filter, etc., is widely used to measure fan and blower pressure, filter resistance, wind speed, furnace pressure, orifice plate differential pressure, bubble water level and liquid amplifier or hydraulic system pressure etc. It is also used for air-gas ratio control and automatic valve control in the combustion process, as well as blood pressure and respiratory pressure monitoring in medical care equipment. [0003] T...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a pointer type differential pressure gauge calibration device to solve the problem of large calibration error of the existing pointer type differential pressure gauge

Images