Rev counter

[RedTrev]

Hi,

If I was going to connect that rev counter to a vehicle with an ignition coil I would probably try wiring it like this:

Is this how you've already tried it? If no, then try this way, if yes what was the outcome?

[Burney]

Hi sorry for late reply thanks for the great pic. Rev counter works at t0% output with the sender and live cables attached. If I hook up the earth lead it reads nothing at all???

[RedTrev]

I would suggest then it's a tacho designed for a vehicle (possibly a diesel, although the scale is high (10k)) which has a magnetic sensor to generate the pulses (there's reference to "perception head" on the cct diagram). The number of pulses per revolution on its intended vehicle (induced by a toothed wheel perhaps) may not match the pulses of a 4 cylinder ignition coil based vehicle.

Edited April 28, 2020 by RedTrev

[Burney]

Thank you I think you are right. It just doesnt match vehicle. 

 

Can you advise on one that would?  Or a supplier I could ask?

 

Thanks

 

Kris

[RedTrev]

If you want new, then Caerbont Automotive Instruments now make the classic Smiths gauges. You can check their website https://www.smiths-instruments.co.uk/classic. There's a tab for their dealers, which includes Demon Tweeks, Europa, Mini Spares and the like.

Edited April 29, 2020 by RedTrev

[Burney]

Thank you Redtrev