05-08-2018, 11:19 AM
Finally the Seaward reached the top of the round tuit pile. After further checking I was totally convinced that the 4052 chip I had fitted was either faulty or incompatible with the circuit. The original chip was a 4052B and all I could find at the time was a 74HC4052. Changing the device is no mean feat as it is a surface mounted SOIC part so it was kill or cure time. Luckily I managed to do the swap and not damage a single pad.
After refitting the backup battery a long soak test confirmed the volts on neutral fault had gone. Not only that the missing setup message had also cleared. I'm pretty sure that this message was more to with the battery being flat rather than the original problem.
Now for the Megger PAT4 that reports 1.4mA leakage during a run test when there is no leakage present. Alas service info is non-existant on the net.
Al
After refitting the backup battery a long soak test confirmed the volts on neutral fault had gone. Not only that the missing setup message had also cleared. I'm pretty sure that this message was more to with the battery being flat rather than the original problem.
Now for the Megger PAT4 that reports 1.4mA leakage during a run test when there is no leakage present. Alas service info is non-existant on the net.
Al
Tuned for maximum smoke . 
