Erratic continuity

[zoidberg]

I'm trying to check the serviceability of two Battery Selector/Isolator switches - rotary ones.

The Perko 8501 makes the right noises when the switch is rotated through the options, and 'continuity tested' with a multimeter. The Plastimo one doesn't.

I've unfastened the back and cleaned/burnished the contactors to bright metal, and re-assembled. Same odd ( to me ) set of results - continuity when there shouldn't be, and none when there should.

I've tried refastening the central rear part in each of the 4 possible orientations, with similar but not identical results. And I'm more than a little confused.

Could someone with access to a known Plastimo rotary switch kindly advise where the 2 Field connections should be, oriented in respect of the cut-out slot, in 'clock-code'?

Or should I throw them both away and go speak with Mr Sterling...?

 

[William_H]

A digital multimeter cna be frustrating on low ohms range. Firstly to get a reliable connection of the probes then the wildly fluctuating numbers until they settle down. Far better might be a buzzer or lamp (incandescent) with battery and decent terminals bolted onto the switch terminals. Then you can be a bit more certain of what is going on with the switch.
As you have managed to dismantle the switch it should be possible to figure out how it is meant to work. good luck olewill
Sorry no real help at all.

 

[coopec]

Is this any help?
https://www.plastimo.com/en/commutateur-de-batterie.html

If you want technical specifications you can download "Technical documentation & diagrams"

Good luck!

Clive Cooper

 

[zoidberg]

Thanks, Clive Cooper. I'd found that.

I'm trying to eliminate, and one possibility is re-assembly wrong way round. The control switch/knob clicks into place. The internal contactors make and break wrongly. I'm trying to determine if it's a 're-assembly wrong' issue or something broked/wored-out - or to put it technically, 'stuffed'......

And I don't know how I managed to duplicate this question. The software is supposed to prevent that - as is my ever-vigilant memory.

 

[GrahamM376]

The clue is most likely the micro switch. Put the knob in the Off position and assemble the back plate so the micro switch is in the closed position to protect the alternator.