Calibration gas classification and preparation
In the measurement process of calibrating measuring instruments, such as physical chemistry experiment, biological engineering, calibration environmental measurement and engineering experimental measurement, all kinds of calibration gases will be used. Calibration gas measurement is a professional measurement calibration for determining all kinds of values.
Calibration gases can be divided into two categories: real gases and ideal gases. An ideal gas is an ideal state in which there is no interaction between the gas molecules and the gas molecules themselves have no volume and mass. The state of the actual gas is very close to that of the ideal gas, so it can be treated as an ideal gas, but the deviation between the actual gas and the ideal gas should not be forgotten. The conclusion of ideal gas and real gas only applies to real gas with low pressure and temperature.
Nowadays, the application of calibration gas is more and more extensive, and various calibration gas specifications are not poor from the beginning. Now, the application of calibration gas can be roughly divided into several calibration gases, such as gas alarm, electric energy, petrochemical, environmental protection monitoring, medical and health care, instrument and meter, laser cutting and welding, etc.
Calibration gases are divided into binary, ternary and multivariate calibration gases according to their composition. Each industry has its own valve distribution method. The calibration of valve distribution shall be based on the type of valve distribution and the deviation analysis of gas according to the requirements.
There are many methods to analyze calibration gases, but the main ones are gas chromatography, which is suitable for inorganic gases such as oxygen, nitrogen, argon and helium and is also the most commonly used. The most common method of analysis; Chemiluminescence method is suitable for the analysis of sulfide, nitrogen oxide, ammonia and other calibration gases. Non-dispersive infrared method is a method to measure the content of gas components in calibration gases by using different gas Chambers and detectors. The last type of trace oxygen analyzer, in the analysis of all high purity gases, must accurately measure the trace oxygen content, but because there is a lot of oxygen in the atmosphere, all trace oxygen measurement is one of the difficulties in all gas analysis.
And then finally, what about the calibration gas? Now the calibration gas configuration methods are divided into weighing method, osmotic method, partial pressure method, diffusion method, volume method, saturation method, flow method, dilution method, volume method. These gas distribution methods include virtually all the calibration gas configuration methods available today.
Before configuring calibration gases, it is necessary to know exactly what kind of gases, gas concentrations and gas filling specifications you need. All kinds of calibration and mixed gases of Newradar gas need to be configured according to requirements, with accurate accuracy and minimal error.