nasa battery monitor

[pvb]

Just bought one of these, but am not sure how to wire up. No wiring diagram supplied! Do I connect the shunt by splitting the -ve or +ive lead to the battery? I presume the small leads connect red to + and - to negative but to what does the yellow wire go to? I am going to give this a whirl but will probably fit a BM2 or Victron BMV 700 if it does not give me at least some info.!
Many thanks. See post 81

If you look at some of the other eBay ads for this cheap meter, you'll find wiring diagrams, eg this one...

View attachment 69893

 

[vas]

If you look at some of the other eBay ads for this cheap meter, you'll find wiring diagrams, eg this one...

View attachment 69893

nice one, blimey, got everything wrong!



V.

 

[halcyon]

nice one, blimey, got everything wrong!



V.

Or this one, which one is right ? suspect this one pending more info https://www.ebay.co.uk/itm/Pro-DC-0-100V-0-100A-Digital-Voltmeter-Ammeter-LED-Amp-Volt-Meter-Current-Shun/263437693685?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D2%26asc%3D49138%26meid%3D5f963fbd472b421d80765c19dcdeb460%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D112470347383%26itm%3D263437693685&_trksid=p2047675.c100005.m1851

Brian

 

[Kurrawong_Kid]

I personally have a BMV700, but I've also installed another shunt for the old analogue Ammeter of the boat so since none has answered I'll try (no responsibility if it works differently though!)

split the -VE (most shunts where on the negative.
the two wires on the shunt go to the ammeter you get them the wrong way round, shows negative amps (on my analogue gauge, swap them over, no big deal!
The black and red go as you say to the battery or generally power.
The yellow, no idea, I can only think it's a trigger current to start the thing when something else is working, or other option is that it affect illumination.
Anyhow, start with the red/black and see if it fires up, I give it 80% it works, if not carefully and momentarily touch the yellow to the red and see if it works.

goodluck!
if someone else has actually got one, obviously listen to him and not me!

cheers

V.

Many thanks. I’ll give it a whirl next week end and see what happens!

 

[Kurrawong_Kid]

Or this one, which one is right ? suspect this one pending more info https://www.ebay.co.uk/itm/Pro-DC-0-100V-0-100A-Digital-Voltmeter-Ammeter-LED-Amp-Volt-Meter-Current-Shun/263437693685?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D2%26asc%3D49138%26meid%3D5f963fbd472b421d80765c19dcdeb460%26pid%3D100005%26rk%3D3%26rkt%3D6%26sd%3D112470347383%26itm%3D263437693685&_trksid=p2047675.c100005.m1851

Brian

Meter looks more like one in Vas’s post. The three wires, black, yellow, red are the smaller size and the red and black bigger as in that post. Both say leave the black in the three block unconnected. I’ll report back on the efficacy of the unit.