When selecting petroleum instruments, we should first determine the objectives of the demand inspection according to the nature of the petroleum products inspected by our own company. According to the national standard to select the appropriate analytical instruments. Not the cheaper the better, nor the higher the offer the better.
According to the needs of the unit to understand whether the instrument function of the production or sale unit is in line with the actual needs of the unit. The main purpose is to know whether the function of the instrument is suitable for checking the chemical composition and content scale checked by the company. Some instruments can check the content, but cannot ensure the accuracy of the measured composition within a specific content scale. That cannot ensure the accuracy. It is necessary to know more about the inspection accuracy of the instrument, to know the application function and protection status of the instrument, and not to promise that the longer the warranty time of the instrument, the better the quality. It is mainly understood from the following aspects: whether the unit that supplies or produces the instrument has the ability to provide skill support, including the ability to improve skills.
1, should understand the supply or production unit's after-sales service and instrument quality stability function, if necessary, can first use the relevant samples to the supplier or production unit inspection and comparison, whether in a reasonable time to provide a credible inspection statement.
2, should understand the instrument quotation and the total investment of supporting equipment, some instruments offer lower, but to be able to use, the total quotation is not low, that is cheated.
3, should understand the instrument in the process of the cost of the situation is how much, otherwise the purchase of an instrument is very cheap, but the use of the cost is very high, it is a small loss.