The other day I finally replaced the power supply in my plasma display that has been causing excessive heating for years.

I wanted to test some of the capacitors in the old board, so I pulled a 200v 3000uF cap. I set my Extech 22-816 to capacitance mode, attached the leads and it read 1.06nF and 0.05nF with REL.

I tested multiple caps, and every time I got pretty much that same reading. Even brand new caps I know are good. I even tried different leads, same readings.

Am I doing something wrong or is my meter defective?

 

The other day I finally replaced the power supply in my plasma display that has been causing excessive heating for years.

I wanted to test some of the capacitors in the old board, so I pulled a 200v 3000uF cap. I set my Extech 22-816 to capacitance mode, attached the leads and it read 1.06nF and 0.05nF with REL.

I tested multiple caps, and every time I got pretty much that same reading. Even brand new caps I know are good. I even tried different leads, same readings.

Am I doing something wrong or is my meter defective?

http://www.extech.com/display/?id=13709

 

Hi,
take note: everytime you will used the tester always select first in resistance mode to verify the probe

continuity if good. Then go to next mode.

Sometime it happened the probes are not seated properly in the socket or loose connection.
Now if the probes are okay either the input circuit of capacitance mode is bad or the capacitance circuit,
of the tested itself.

 

The maximum capacitance that meter will read is 200uF.