English to Polish Tech/Engineering Engineering (general)

Ensure that topping heaters are set up, have electrical power and are ready for operation.
Begin setting desired air flow temperature at test article by increasing electrical power to topping heaters.
Begin increasing electrical power to SAS air topping heater to achieve approximately the same air temperature value as the main test article air flow temperature.
Begin to gradually decrease topping heater power to decrease the air supply temperature to the test article.

Jesteśmy w laboratorium badającym przepływy powietrza w silnikach.
Podejrzewam, że jest to jakiś element grzejny, który dodatkowo podnosi temperaturę, ale ani nie mam pewności ani nie wiem, jak to najlepiej nazwać po polsku.