Principle of rapid verification system for pressure gauge manufacturers

The automatic verification system of pressure gauge manufacturers includes two parts: pressure gauge verification/calibration management system and automatic interpretation system of instrument indication value. The visual interface of the system makes the operation very simple. The operator only needs to input the necessary parameters such as range and precision, and the pointer reading of the pressure gauge can be automatically read out. The given automatic interpretation method can be used to automatically detect and interpret the accuracy of various instruments, and its accuracy depends on the resolution of the image and the limited processing time. Improve the backward situation of manual verification of pressure gauges, and improve the automation level of verification work and the stability of verification results to a certain extent.

Vacuum pressure calibrator is a commonly used pressure instrument, which has many advantages such as simple maintenance, good stability, strong durability and flexible use, and is widely used in many industries such as industry, chemical industry, petroleum, electronics, ships, machinery and so on. How much do users know about the characteristics of vacuum pressure calibrator when using it? These are also very important for users to use. Today, Wuxi Quanjun Instrument Co., Ltd. will introduce the characteristics of vacuum 

Characteristics of vacuum pressure calibrator;

1. Manual pressurization, which can be used as a remote air source, can achieve the required stable pressure value by fully automatic positive and negative stroke pressurization, setting any number and directly pressing the Enter key;

2. Built-in intelligent multifunctional display instrument; Easy to carry, stable pressure output, high-definition dot matrix liquid crystal display, stability accurate to 0.01KPa, plus or minus one word change at the last decimal point;

3. Integrating positive and negative pressure, it is convenient to switch between positive and negative pressure, can be set step by step, and can automatically control the calibration process;

4. Pressure modules with different ranges can be selected for multi-range measurement, which is simple to operate and improves the verification efficiency;

5. Pressure and current/voltage measurements are all calibrated digitally;

6. Double-row LCD display with backlight;

7. Two power supply modes: AC220V and built-in rechargeable Ni-MH battery, which are convenient for field use;

8. With R232 interface, data communication can be carried out with the computer;

9. The shell is exquisite aluminum alloy box, which has strong wear resistance and seismic reliability.

What are the requirements for the selection of diaphragm pressure gauges?

Release date: February 3, 2021 Author: Wuxi Quanjun Instrument Co., Ltd. Click: 220

What are the requirements for the selection of diaphragm pressure gauges?

The selection of diaphragm pressure gauge mainly includes instrument type, measuring range, accuracy and agility, shape and size, and whether remote transmission and other functions are needed, such as indication, recording, alarm and control. The basis for selection is as follows:

(1) It is necessary to meet the requirements of the production process, including range and accuracy;

(2) It is necessary to consider the properties of the measured medium, such as temperature, pressure, viscosity, corrosiveness, flammability and explosive degree, etc.

(3) It is necessary to pay attention to the on-site environmental premise when the instrument is installed and used, such as environmental temperature, electromagnetic field and vibration.

When selecting the measuring range, it should be noted that the normal pressure should be at the upper limit of the scale for the condition of no disorder; For pulsating pressure, the normal pressure should be at the upper limit of the scale; For high pressure, the normal pressure should be below the upper limit of scale.

es of the measured medium, the diaphragm manometer with corrosion resistance or the corrosion-resistant material for the department in contact with the medium should be selected for the medium with strong corrosion resistance; Diaphragm manometer is selected for viscous, crystalline and easily blocked media; According to the classification of explosive dangerous media, pressure-resistant explosion-proof or intrinsically safe explosion-proof grid is selected; Special pressure instruments should be selected for measuring oxygen, ammonia, hydrogen, acetylene, hydrogen sulfide and other media.

Judging from the requirements for the output signal of the instrument, for the situation that only the pressure change needs to be observed, a direct indicating instrument such as a spring tube or a U-shaped liquid column can be selected; For the case that pressure signals need to be transmitted to the control room or other electric instruments, electrical pressure detection instruments or other instruments with electric signal output, such as strain pressure sensors and capacitive pressure sensors, should be selected; In the case of detecting rapidly changing pressure signals, electrical pressure detection instruments, such as diffused silicon pressure sensors, should be selected.

From the use environment of the instrument, for the environment with extremely high or low temperature, sensitive elements with small temperature coefficient should be selected; For the explosive environment, when using the electric pressure gauge, the safety explosion-proof pressure gauge should be selected.

All kinds of pressure gauges have their own characteristics and scope of application. After selecting the pressure gauge, it should also be installed accurately to avoid measurement errors caused by improper installation. The installation of relevant pressure gauges must be carried out in strict accordance with the manual of pressure gauges.

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