What is the precautions for cleaning oil cups of oil bdv tester?

1.Oil Cup Cleaning Method

(1)Wipe the electrode surfaces and bars repeatedly with a clean silk cloth.
(2)Adjust the electrode distance using a standard gauge.
(3)Use petroleum ether (other organic solvents are forbidden) to clean three times. Each time should follow the procedures below:
a. Pour petroleum ether into the oil cup until it is 1/4 to 1/3 full.
b. Cover the cup mouth with a piece of glass cleaned with petroleum ether. Shake the cup evenly for one minute with a certain force.
c. Pour out the petroleum ether and dry the cup with a blower for 2 to 3 minutes.
(4)Use the oil sample to be tested to clean the cup 1 to 3 times:
a. Pour petroleum ether into the oil cup until it is 1/4 to 1/3 full.
b. Cover the cup mouth with a piece of glass cleaned with petroleum ether. Shake the cup evenly for one minute with a certain force.
c. Pour out the remaining oil sample, and then the test starts.

2.Agitating Blade Cleaning Method

(1)Wipe the agitating blade repeatedly with a clean silk cloth until no fine particles are found on its surface. It is forbidden to touch the surfaces with hands.
(2)Use forceps to clamp the blade; place it in petroleum ether and wash.
(3)Use forceps to clamp the blade and dry it with a blower.
(4)Use forceps to clamp the blade; place it in the oil sample to be tested and wash.

3.Oil Cup Storage

Method 1: Fill the cup with good insulating oil after the test is finished and place it securely.
Method 2: Clean and dry the cup, then place it in a vacuum dryer.
Note: The oil cup and agitating blade shall be cleaned according to the above procedures after the first test and after tests with poor oil.