Battery discharger capacity tester, power quality analyzer, ac/dc load bank, battery internal resistance tester, battery conductance tester, ac/dc power system, ups power, stationary battery, ups battery backup, optical power meter, pon power meter, fusion splicer, otdr, optical ligh source, optical variable attenuator, optical multimeter, optical identifier, adsl tester, adsl2+tester, xdsl tester, 2m transmission analyzer, e1 tester, bit error rate tester
