Shanghai Longtuo provides the use of Mai's vacuum gauge

How to use the McGee vacuum gauge:

1. Before use, first lift the vacuum exhaust pipe up and place the vacuum gauge underneath to prevent the mercury beads in the glass tube from sliding into the exhaust pipe during transportation. Then pull up the rubber stopper, apply castor oil or vacuum grease on the inner wall of the exhaust pipe to connect directly to the interface of the vacuum system to be tested, turn on the mechanical vacuum pump for about 3-5 minutes, then slowly open the vacuum outside the vacuum gauge. Valve, when the instrument enters the working state 2, if the vacuum degree of the vacuum system is a rough vacuum, the reading value is the sum of the scale values ​​indicated by the two mercury beads, and the operation method is the same as the original Mai's vacuum gauge. (shown on the surface). ?

Our company produces a large number of Mai's vacuum gauges, and the Mai's vacuum gauges are the instruments produced and sold by the company's masters. The quality inspections are qualified. If customers want to know more about the Mai's vacuum gauges, Shanghai Longtuo Instrument Equipment Co., Ltd.

Maintenance of Mai's vacuum gauge:

When the pressure gauge is rotated to the upright position, the pressure gauge should be slowly moved. When the vacuum gauge is used, it should immediately return to the horizontal position. During the recumbent process, small particles of mercury can be stuck at the entrance of the glass container, and the pressure gauge can be reversed to recover the mercury beads.

· Inadvertent transportation and use can cause the mercury beads to enter and adhere to the intermediate glass capillary. The vacuum gauge can be pumped by a mechanical vacuum pump, and the vacuum gauge can be oscillated back and forth to return the mercury beads. If it still does not work, the glass tube at the upper end of the mercury bead can be slightly heated while pumping, and the mercury beads are recirculated by the thermal expansion of the air.

· After the vacuum gauge is used, the rubber hose should be tightened. First close the vacuum valve and then close the vacuum pump to prevent the oil in the vacuum pump from entering the vacuum gauge and vacuum system.

· To maintain the purity of mercury, mercury contamination will affect the accuracy of the measurement.

·The vacuum gauge is not used for a short period of time. You can use the iron tie to tighten the rubber tube, use gauze to wipe off the grease of the rubber tube, and then plug the inner tube with the plug, and store it in a dry, ventilated and dark place.