volt/amp meter

[Jduane]

what's up guys

I'm thinking about adding this volt/amp meter

http://www.amazon.com/gp/product/B00BYKRETK/ref=ox_sc_sfl_title_2?ie=UTF8&psc=1&smid=AFHAE9RJVUMB

and if required a shut like this

http://www.amazon.com/gp/product/B006Z94T3Y/ref=ox_sc_sfl_title_3?ie=UTF8&psc=1&smid=A1THAZDOWP300U

ill be running 3 2400.1 amps, they recommend a 250a fuse each and a Pioneer GM-D8604 with an 80a fuse

Q1. should I install 1 at each amp or 1 for all amps?

Q2. what type of shunt would I need?

Q3. will this be accurate enough to see amp draw?

Q4. any better options before I cut up my dash?

thanks in advance

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[keep_hope_alive Premium Member]

the meter is wrong for the application. the meter needs to perfectly match the shunt. so you need a 600A ammeter to pair with a 600A 75mV shunt.

a shunt rating works like this: a 600A 75mV shunt will have a 75mV voltage drop when 600A is through it. currents less than rated are linear, so the meter calculates amperage based on voltage drop across the shunt.

if you want three 200A meters and shunts you'll have one for each amp... unless your system is really only capable of 200A draw. and really, a single 300A meter/shunt would be fine.

 

[shammyhavik]

Off-topic, i'm not trying to start a whole thread.

Anyone suggest an amp thermometer? Preferably long enough to mount on the dash but rear install is cool too.

Also how would i go about installing it? Just electrical tape the sensor to the hottest part of the heatsink?

 

[adulbrich 5,000+ posts]

what's up guysI'm thinking about adding this volt/amp meter

Amazon.com: DROK® DC Volt Amp Meter 2in1 Digital Amperemeter Voltmeter LED Tester Blue Red 0-100V/10A Car Battery Monitor: Home Improvement

and if required a shut like this

http://www.amazon.com/gp/product/B006Z94T3Y/ref=ox_sc_sfl_title_3?ie=UTF8&psc=1&smid=A1THAZDOWP300U

ill be running 3 2400.1 amps, they recommend a 250a fuse each and a Pioneer GM-D8604 with an 80a fuse

Q1. should I install 1 at each amp or 1 for all amps?

Q2. what type of shunt would I need?

Q3. will this be accurate enough to see amp draw?

Q4. any better options before I cut up my dash?

thanks in advance

I have that exact ampere meter. Voltage reads fine, but I never did figure out how to get it to read amps. It came with no directions

 

[Jduane]

I just tested 1 amp, its pulling 106 amps from 12.8v batts, connected to a 2 ohm at 1362.42 watts.

I'm guessing at 1 ohm it would pull 160 amps, so 160 x 3 = 480amps + 80 from 4 channel = 560amps

how do you guys usually monitor big systems?. I would prefer 1 meter that can toggle between functions.