Sunday, November 13, 2005

Digital Meter- Is it necessary?

I met quite a number of technicians who works in the electronic troubleshooting line do not have digital meter. It was a surprised to me as digital meter can help us to measure voltage, current and resistance more accurately compare to analog meter. They are still using the old ways (using analog meter) to troubleshoot electronic circuit. There is no way one meter can accurately measure all kind of electronic components. For example, esr meter is for checking electrolytic capacitor and low ohms resistor, digital capacitance meter is to measure the value of any capacitor, coil tester is for checking coils and inductor for any shorted winding. Though they can troubleshoot electronics problem, the amount of time they spent are more compare to those who have more testing equipment. I still can remembered those days i use analog meter to check resistor, until one fine day where a monitor sent in for repair complaint of small vertical height-it's about 4 inches in height. I've checked all resistors nearby verticle ic with my analog meter and found all to be good. When i recheck again the resistors with digital meter-i found a resistor value changed from 1.2 ohm to 1.8 ohm which analog meter were hard to differentiate. From that day onwards i told myself that checking resistor i have to use digital meter. Not only you must have a digital meter but a good digital meter. Get a digital meter that can last and robust and i can assure you that you won't regret of the decision that you have made. Visit Fluke's website for more information on digital meters.

2 Comments:

Anonymous Anonymous said...

Can you tell me if it is possiable
to ck the high voltage of a flat panel monitor inverter circuit with a dvm meter or an oscope ? i need to trouble shoot these circuits to determine
if the backlight is bad or the inverter circuit . Thanks ron g

3:41 PM  
Blogger Jestine Yong said...

digital meter can't measure the inverter output-you need a scope. When the scope probe place near to the inverter you will see a sinewave which indicate the inverter is functioning. There is some tech's using cheap or refurbish notebook to power the lcd monitor lamp. If it light then the inverter have problem. If there is no light the lamp have to be replaced!

9:14 AM  

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