03-10-2013, 10:19 PM
In order to test a capacitor for an acceptable value of leakage - which, ideally, will be zero µA - the voltage applied to that capacitor needs to be approximately the same as the rated working voltage of that capacitor. This important consideration, that unit fails to do. 
Consequently, a H.V. d.c. supply which has a variable output, albeit over a limited range - or one with pre-set values of voltages - is required, so that capacitors of various working voltages can be reliably tested for leakage. Such a device is not difficult to design: indeed, many have been published over the years; some are available on the 'Net.
Now add to that criticism Rob's highly-relevant comment (as above), and in my opinion, this unit should not be built: it fails to meet its design requirement; it is dangerous.
No disrespect to you David: just my own personal opinion of this design.
Al. / Skywave / Oct. 3, '13 //
Consequently, a H.V. d.c. supply which has a variable output, albeit over a limited range - or one with pre-set values of voltages - is required, so that capacitors of various working voltages can be reliably tested for leakage. Such a device is not difficult to design: indeed, many have been published over the years; some are available on the 'Net.Now add to that criticism Rob's highly-relevant comment (as above), and in my opinion, this unit should not be built: it fails to meet its design requirement; it is dangerous.
No disrespect to you David: just my own personal opinion of this design.
Al. / Skywave / Oct. 3, '13 //
