Min Charging Voltage This Winter?

[yamaha1300rider]

Just noticed that the only time I see 14.0 is on cold start up with no load when revs are at 2k

Paul

01 fjr

uk

 

[Constant Mesh]

The wire size/length to the Datel is of no consequence. The current flowing to the Datel is about 8 milliamps. For 18 awg copper wire the resistance per 1000 feet is about 8 ohms. So, assume your wire to and from the Datel is a combined 10 feet. Then the resistance for this Datel circuit loop is 10 / 1000 * 8 = 0.08 ohms.

Then the voltage drop of the Datel circuit loop is:

0.08 ohms x 0.008 amps = 0.00064 volts or 0.64 millivolts

The wiring connections, fuses and relay contacts in the circuit loop would have far more effect on the Datel voltage reading.

 

[Constant Mesh]

yamaha1300rider --

You mentioned that you connected the Datel's positive input wire to the horn relay. Do you get a voltage readout all the time or only when you toot the horn?

If it's only when you toot the horn then that may be why your readings are a bit low. When the horn is sounding you're seeing the voltage drop of the horn current between the battery and the output of the horn relay contact. This includes the fuse, relay contact, wire and connections.

If you're connected to the input of the relay contact then I'd assume your Datel is always on.

 

[yamaha1300rider]

Constant Mesh

My Datel is on all the time the ignition is on

Paul

01 fjr

uk

 

[motorgod]

Move to CA...I ride year round....Never have to worry about 'winterizing'

 

[yamaha1300rider]

Some great pics, Motorgod! You do like your blondes - well who doesn't?

Paul

01 fjr

uk