Vacuum pressure gauges are suitable for measuring the pressure of liquids, gases, or vapors that are non explosive, non crystalline, non solidifying, and have no corrosive effect on copper and copper alloys. A vacuum gauge is an instrument used to measure pressures below atmospheric pressure, with atmospheric pressure as the reference. Pressure vacuum gauges are mainly suitable for measuring the pressure of ammonia liquids, gases, or their mixtures in fertilizer production processes or refrigeration equipment; It can also be used to measure the pressure of various non corrosive, non crystalline, and solidified media such as ordinary carbon steel, austenitic stainless steel, alloy structural steel, and tin lead alloy brazing materials.
And the operating environment temperature of the vacuum pressure gauge is -40~70 ℃, and the relative humidity is not greater than 80%. If it deviates from the normal operating temperature by 20 ℃, it must be included in the temperature additional error. The instrument must be installed vertically, striving to be at the same level as the measuring point. If the difference is too high, it will be included in the additional error caused by the liquid column, which does not need to be considered when measuring gas. Block the explosion-proof port at the back of the watch case during installation to avoid affecting the explosion-proof performance.
The normal measurement range of a vacuum pressure gauge should not exceed 3/4 of the upper measurement limit under static pressure and 2/3 of the upper measurement limit under fluctuation. Under the above two pressure conditions, the minimum measurement of the large pressure gauge should not be lower than 1/3 of the lower limit, and all vacuum parts should be used when measuring vacuum. If the instrument pointer malfunctions or internal components become loose or cannot function properly during use, maintenance should be carried out or the manufacturer should be contacted for repair.
Vacuum pressure gauge is a commonly used measuring instrument with certain applications in many fields. There are also many issues that users need to pay attention to when using a vacuum pressure gauge. So careful use is still necessary, so that's all for today's introduction. I hope it can be helpful for your understanding.
