I need help with analog ammeter and voltmeter

[mark]

Well I run dual power supplies, my second psu is for running an 86w peltier, 3 120mm fans and 2 80mm fans. I would like to get something that will tell me how many Volts and Amps are coming from the +12V line, so these are the things I am looking at getting...

This is the Voltmeter: http://www.sailnet.com/store/prodimage/160x160/bss8003.gif
Analog DC voltmeter. 8-16 Volts displays to .2 volt. Simple 2-wire connection. Face width 2 1/2'. Mounting hole 2 1/16'.

This is the Ammeter: http://www.sailnet.com/store/prodimage/160x160/bss8005.gif
DC Ammeter. Simple 2-wire connection from shunt. Meter senses and powers from shunt connection. Ammeter Analog 0-25 DC. Face width 2 1/2". Mounting hole 2 1/16".

This is the Powersupply Information:
AC~Input : 115/230V~ 8/4A 60/50 MHz
DC Output : + 3.3V 30A / +5V 40A / +12V 15A / -12V 0.8A / -5V 0.5A / +5V SB 2A / +5V & +3.3V Combined Load 210W / Total Output is 425W Max

I am wondering how do I hook these things up, and will it work?
Please help/reply,
mark

[Robbie]

dude that meter will work just fine. As far as mearsuring voltage just touch the red wire to the red outlet and the black wire to the black outlet.


AS FAR AS CURRENT!!!!


IF YOUR NOT EXPERIANCED IN THAT DONT DO IT!!!!!!!!!!! i cannot stress this enough. YOU HAVE A VERY HI POWER PS. IF you do it wrong you COULD AND WILL DIE!!!!!!!!!!


DFW DONT
F**K
Withit

You have to open the circuit and put the meter in series with the load. And doing this you have to pay attention to CURRENT flow!!!

If you want to measure the current of your pelt and you have HI WATTAGE pelts, your going to DRAW some SERIOUS CURRENT.


Rob

[mark]

This is the information about Current Draw;

Peltier - 7.167 Amps
2 80mm - .11 Amps each
3 120mm - .717 Amps each
2 60mm - .6 Amps each

10.021 Amps Total Draw from the +12V line

But I would like to know if this works, and what the meters should or may say.
(like will the voltmeter say 12V or around, and will he ammeter say 10A or 5A (15Amp output - 10Amp Draw?)

[mark]

is this what you mean?
f3ar my mspaint skillz

http://www.mjstebbins.com/plan.jpg

[Shep]

put the Ampmeter in series with the load like the drawing shows as long as the PSU is unpluged there is very little risk of being shocked solder your connections and use heatshrink or black tape to cover the connections (heatshrink is the perfered method). The Ampmeter's will only show the current being draw in that leg of the circuit.

[mark]

hrmm, i already know the current draw, is there any way that i can check to see if that psu is really sending 15 Amps on the +12V line?

[Shep]

Current doesn't get sent, a device will only draw as much as it needs. The only time you run into problems is when the source can't supply enough. Unless you can draw 15A you won't see it on your meter.

[mw521]

Originally posted by Shep
Current doesn't get sent, a device will only draw as much as it needs. The only time you run into problems is when the source can't supply enough. Unless you can draw 15A you won't see it on your meter. Exactly, a device providing can supply X amount of current, if it needs to, A device using it will demand X amount when needed. :beer: