при проведении испытания, когда про

при проведении испытания, когда проводили испытания в лаборатории показали хорошие характеристики прибора.

Результаты (английский) 1:

during the test, when conducted tests in the laboratory have shown good characteristics of the device.

Результаты (английский) 2:

during the test, when carried out tests in the laboratory have shown good performance of the device.

Результаты (английский) 3:

during the test, when conducted tests in the laboratory showed the good characteristics of the device.