Buku la Testboy TV 410 Phase Sequence Indicator limapereka malangizo omveka bwino ogwiritsira ntchito tester field iyi yozungulira. Popanda mabatire ofunikira, choyesa ichi cha CATIII 400V chimathandizira kuzindikira komwe akuzungulira ndikuwonetsa magawo atatu okhala ndi kuwala l.amps kwa makina, ma motors, mapampu, ndi machitidwe omwe akugwira ntchito pa 120-400 VAC, 50-60 Hz. Onetsetsani chitetezo ndikuchepetsa zoopsa ndi Chizindikiro cha Sequence Sequence cha TV 410 Phase yodalirika komanso yothandiza.