It is used mainly for the photometric calibration in ZWL series LED testing system, and a color calibrating system with ZWL-600 and ZWL-81XX series precise number direct-current power supply.

• 主要用于ZWL系列LED测试系统光度的定标，与ZWL-600和ZWL-81XX系列精密数显直流电源组成光度、色度仪器的定标系统。