On site equipment management is one of the quality supervision systems in our factory.

The portable oil particle counter YKJ-B is easy to carry, operate, read quickly, and has a wide range of applications, making it very suitable for on-site equipment management.

1、 Working principle

The dielectric constant of a substance is a measure of the conversion of electrical energy by insulating materials. During the operation of the equipment, some molecules in the oil are polarized due to oxidation, acidification, and the formation of other molecules and radioactive substances. The increase of polarized molecules leads to an increase in the dielectric constant of the lubricating oil mixture, resulting in a decrease in the lubrication quality of the oil. Metal particles and other highly conductive pollutants, as well as water and antifreeze, can cause a significant increase in dielectric constant, while pollution caused by gasoline can cause a decrease in dielectric constant.

2、 Application of Portable Oil Particle Counter in Equipment Field Management

We mainly use this instrument to conduct on-site inspections of the use of lubricating oil in equipment such as water injection pumps, oil transfer pumps, motor vehicles, well boring machines, and metal cutting machine tools.

• If the pointer can be adjusted from positive to "0" position and remain stable, this is normal pollution, indicating that the oil product has been contaminated by oxides, acids, sludge, fuel residue, etc. If the indicated value of the scale knob exceeds the threshold value of the oil (4 for petroleum based lubricants and 8 for synthetic oils), it indicates that the lubricant is severely contaminated and the oil and filter should be replaced.
  
• If the pointer can be immediately zeroed from the positive offset, and then continue to show positive offset, or if the pointer is firmly offset to the full dial in the positive direction, it belongs to abnormal pollution, which is caused by the mixing of water, antifreeze or metal shavings in the oil. At this point, it is necessary to carefully inspect the oil circuit and cooling system of the vehicle and the drilling rig to determine if there are any leaks; For the water injection pump, a filter machine is also used to filter and test the oil.
  
• f the pointer deviates negatively by a certain distance, it indicates abnormal pollution caused by gasoline. This is mainly for motor vehicles, which require careful inspection of the fuel system and fuel system.
  

The first two situations often occur in on-site management, while the third situation occurs less frequently, only once in a year's inspection.

We use charts to reflect changes in oil quality, and there is a linear relationship between oil quality readings and usage time. When replacing the same engine with new oil, the reading will decrease, but the slope remains unchanged. If the slope changes, such as decreasing, it indicates that fuel has diluted the lubricating oil; If there is an increase, it indicates that the oil filter or air filter is clogged, or water and antifreeze have been mixed in.

Attention should be paid when using:

• Do not operate in rain, snow, or fog;
  
• The temperature of the reference oil sample and the oil to be tested should be as close as possible to avoid the influence of temperature on the dielectric constant;
  
• Keep the sensor surface clean.