Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I have an old poptronix esr meter I use often. it can be used in circuit because the injected signal is around 200mV and does not interfere with semiconductors on the board. **broken link removed**
if you can measure capacitance with such a small signal it would be ok then
I also have a recent deree de5000 lcr meter, and I can measure capacitance and esr in circuit with it because the test signal is small also around 500mV. **broken link removed**
you are limited to the fact that if capacitors are in parallel, you will measure the total capacitance, and this if-s often the case inside power supplies. if one capacitor only is bad, you won't be able to find it without desoldering.