Galvanic isolator- how to test if its working?

[eianm]

When I bought my boat it had a Galvanic isolator fitted already - a Zinc Saver made by Yacht corrosion consultants, who appear to have gone out of business. Using a diode test setting on my multi meter I get 0.917 on one side and 1.000 on the other side.
Can someone who knows please tell me what this means please- good or bad??
thanks ,
Eianm

 

[Charles Erwin]

Try this. http://www.yandina.com/GITesting.html

Charles

 

[eianm]

Thank you Charles- was hoping for someone to answer based on my readings above of the diode pack in my current Yacht corrosion consultants isolator to know if it is faulty or OK

 

[Will Gilmore]

http://www.boatus.com/seaworthy/galvanic/default.asp
This article may answer your question.
"Galvanic isolators attach to the green grounding wire to limit galvanic current flow (up to about 1.2 volts) between neighboring boats while also allowing dangerous AC current to safely pass through to the ground on shore. The most efficient galvanic isolators have a capacitor, which allow the isolator to continue to block galvanic DC current flow even if there is a small AC current leakage on the ground wire."
It reads, to me, like your voltage reading is within the maximum limit of 1.2 volts. Of course, if that is all the DC power being leaked by the ground wire, regardless of the Galvanic Isolator, it may still not be working.

-Will (Dragonfly)