Sometimes, there are many oil samples, testing will be carried out one by one. The cleaning of electrode may be simplified as follows:
(1) Turn off the instrument, take out oil cup from heater, and take out inner electrode from oil cup;
(2) Pour oil from oil cup into a container, use new oil sample to clean oil cup for several times;
(3) Load new oil sample into oil cup;
(4) Use new oil sample to clean inner electrode for several times, then, put inner electrode into oil cup.
