校准仪表 meaning in English

calibrated meter
calibration instrument
gage instrument

I have improved the structure of horizontal platform on which indicating instrument placed in order to solve the problem the original platform got smaller rundistance . i also improved the light to be changeable so that the system could got more appropriate lum that could provide different style indicating instruments calibrating
为了解决了原有三维平移台量程较小和原有光源无法实现多种类型仪表检测的缺陷,改进设计了三维平移台,用于调节被校准仪表和光源的位置;改进设计了光源,实现光源亮度可调。