Description:
R 134A system oil quantity detection cotton car air conditioning refrigerant oil detection cotton R12 detection cotton.
This oil cotton is suitable for all automotive air conditioning snow oil test.
How much snow oil will affect the work of the air conditioning system.
When adding snow oil, check the oil quantity.
It is better for the air conditioning system.
If the oil is too much, it will cause high pressure. If the oil is too small, it will affect the life of the compressor, causing work noise, heat, and death.

Specification:
Product name: Oil quantity testing cotton
Color: White
Material: Cotton paper

Instructions:
Start the air conditioner and let the refrigerant system smash the ring. After two or three minutes, put the test paper on the low-pressure filling
end of the air-conditioning system, and press the middle plastic core against the valve core for two to three times, according to the test.
To judge the amount of system oil.
1. If the oil quantity is only about 20%, the system is seriously short of oil, and 70~100g of snow oil should be added according to the model.
2. If the oil quantity is displayed as about 50%, the system is slightly short of oil, and 30~40 grams of snow oil should be added according to the model.
3. If the oil quantity is displayed as about 70%, the system oil quantity is appropriate and does not need to be replenished.

Oil color judgment:
1. Standard: Pure white cotton color.
2. Normal: Pure white and yellow.
3. Acidification, initial color of heating: yellow, orange, light brown, need to frequently add air conditioning system snow oil, add appropriate amount of oil.
4. Acidification, heating, serious color: red, orange, brown, must be replaced with all kinds of snow oil, re-add snow.

Package Included:
10Pcs x Oil quantity testing cotton

Note:
Transition: 1cm=10mm=0.39inch
1. Due to the light and screen difference, the item's color may be slightly different from the pictures.
2. Please allow 0.5-2 cm differences due to manual measurement.