Bought Kyoritsu Insulation Tester

From the last few post i did mentioned to you that i'm going to buy insulation tester. Here it is now (see photos) the kyoritsu insulation tester. There's many types and ranges of insulation tester but somehow i still preferred the above model which can produce DC output of 250v, 500v and 1000v. Why a repairman need an insulation tester? For your information i bought just to specially check the high voltage capacitor. For example a 102 2kv cap can't be check with our normal analog meter because the maximum output from this meter only could reach 12 + volt dc.

It is a wrong way to use analog meter to confirm whether a high voltage capacitor is working or not. These high voltage caps usually will breakdown when under operating voltage. Checking the capacitance alone won't really let you know how well is the internal insulation is. Thus we have to use an insulation tester to test. The meter will pump in the high voltage dc to test the internal insulation, if there's a short the needle will move upward and stay there. In fact i have collected quite a number of high voltage capacitor that test good using capacitance and analog meter but failed using the insulation meter.

LCD monitor inverter board are using high voltage caps ranging up to 3 kv and usually about 27 pico farad. These caps can breakdown when under loads. Using the insulation tester to test these caps is a sure way to confirm whether the caps are working or not. It really save my time and if the caps test ok then i will move on to check other components-no guessing game. Hope in future will buy more good equipments to speed up the electronic repair.