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Amp Meters
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joe38socalif Offline
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Post: #1
Amp Meters
First off I want to say thank you to everyone who has helped me get this far.
I am at the point now that I need to install my pwm and amp meter.

so I have a 40 amp reley that is set like this


tab 30 = battery on the pos. side.
tab 85 = switch then to fuse box.
tab 87 = cell pos side.
tab 86 = ground.

as well all know the pwm has 4 post.

pos & neg coming in and going out.

my thought is this:

take tab 87 and run in to the incoming pot post on the pwm.
run a ground from the battery to the incoming ground on the pwm.

then run a pos to the hho cell from the pwm and someplace splice into and add a amp meter
then run a ground from the pwm to the hho cell.


now one more question on the amp meter, on the amp meter it has a pos & neg post.
shouldnt we be conectting to both a pos and neg wire to get a true reading ?

CALL YOU CONGRESS MEN AND OR LOCAL LEGISLATOR AND TELL THEM TO REMOVE ETHANOL FROM ARE FUEL. TELL THEM FOOD ON THE TABLES OF AMERICANS IS MORE IMPORTANT AND KILL THE ETHANOL FROM CORN DEAL. ETHANOL FROM CORN CAUSES EVERYONE TO PAY MORE FOR FOOD.
(This post was last modified: 11-13-2008 09:16 AM by joe38socalif.)
11-13-2008 09:13 AM
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sixmenn Offline
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Post: #2
RE: Amp Meters
This is how I understand the relay setup you want:

Connect a 12V (+) wire that is on only with the key in the ON position to the 85 or 86 connector of the relay.
Connect a ground wire to the one you didn't use in the step above (86 or 85). These two, when energized, will close the relay in order to make it connect your 12v (+) to your HHO system.

Next, connect your 12V (+) for your HHO system to the relay at point 30. Then connect the positive of your HHO system to connection point 87. When you energized the relay at point 85 and 86, it will connect 30 and 87 together, completing the circuit. It looks like you plan on wiring it like this from what you described.

As to the PWM, my ZFF PWMv2 connects to the positive at the HHO system and to ground in order for the PWM to operate, but it is then the output of the PWM that connects to the HHO system negative terminal. I do not know whether all PWMs work this way, but ZFF's PWMv2 does. Can anyone educate me on this?

As for the ammeter, cut the wire in two that feeds the HHO system. Place one side of this cut wire on one terminal of the ammeter, and the other side of the cut wire on the other terminal of the ammeter. If you find that the ammeter shows a negative readout, then switch the two wires above. You do NOT connect the ammeter to a positive and negative in order to use it. My guess is that doing so would damage the ammeter. The ammeter reads the current flowing through the wire you cut, telling you specifically what the amperage is in that same wire.


joe38socalif Wrote:First off I want to say thank you to everyone who has helped me get this far.
I am at the point now that I need to install my pwm and amp meter.

so I have a 40 amp reley that is set like this


tab 30 = battery on the pos. side.
tab 85 = switch then to fuse box.
tab 87 = cell pos side.
tab 86 = ground.

as well all know the pwm has 4 post.

pos & neg coming in and going out.

my thought is this:

take tab 87 and run in to the incoming pot post on the pwm.
run a ground from the battery to the incoming ground on the pwm.

then run a pos to the hho cell from the pwm and someplace splice into and add a amp meter
then run a ground from the pwm to the hho cell.


now one more question on the amp meter, on the amp meter it has a pos & neg post.
shouldnt we be conectting to both a pos and neg wire to get a true reading ?

1994 Camry 2.2L 4 cylinder
Smacks Booster
ZFF EFIE with 50 millivolt offset (still tuning)
IAT parallel 10K resistor
CTS parallel 3.9K resistor (removed for winter)
MAP sensor enhancer
Fuel pre-heater
(This post was last modified: 11-13-2008 10:30 AM by sixmenn.)
11-13-2008 10:27 AM
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colchiro Offline
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Post: #3
RE: Amp Meters
Six, to clarify, the +12v that goes to pin 30 should come from the battery. Cells draw too much current to run it through the fusebox. Maybe that's what you meant, it didn't seem obvious to me.

Rick

Links: Documents / Tuning for Mileage | Toyota Sensors | Autoshop Sensor Tutorials
11-13-2008 03:24 PM
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bskakie Offline
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Post: #4
RE: Amp Meters
Hi I just heard of this site. Looks like a lot of excellent info here.I'm wondering if anyone can tell me a source for both pwm's & ampmeters? Also what would be a reasonable price range for both items? I'm into this for about 2 &1/2 months now, so still learning as I go! Cheers, Bob
11-13-2008 10:48 PM
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colchiro Offline
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Post: #5
RE: Amp Meters
Try here for a needle-movement type: http://www.fuel-saver.org/showthread.php?tid=2383

Rick

Links: Documents / Tuning for Mileage | Toyota Sensors | Autoshop Sensor Tutorials
11-14-2008 05:27 AM
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mrbillr Offline
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Post: #6
RE: Amp Meters
bskakie Wrote:Hi I just heard of this site. Looks like a lot of excellent info here.I'm wondering if anyone can tell me a source for both pwm's & ampmeters? Also what would be a reasonable price range for both items? I'm into this for about 2 &1/2 months now, so still learning as I go! Cheers, Bob

And if you are trying to keep it cheap, here is one:
http://www.harborfreight.com/cpi/ctaf/di...mber=95778
Sometimes they are on sale $2 less than this.

MrBill
2008 f250 XLT 6.4 diesel 2x4 automatic extended cab
11-14-2008 05:53 AM
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dogman Offline
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Post: #7
RE: Amp Meters
I found an analog meter at a tractor supply store for about 7$.

Doug
2003 Buick Lesabre Limited
3.8L V6
Minot, ND
11-14-2008 06:00 AM
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sixmenn Offline
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Post: #8
RE: Amp Meters
That is what I meant. Thanks for clarifying.

colchiro Wrote:Six, to clarify, the +12v that goes to pin 30 should come from the battery. Cells draw too much current to run it through the fusebox. Maybe that's what you meant, it didn't seem obvious to me.

1994 Camry 2.2L 4 cylinder
Smacks Booster
ZFF EFIE with 50 millivolt offset (still tuning)
IAT parallel 10K resistor
CTS parallel 3.9K resistor (removed for winter)
MAP sensor enhancer
Fuel pre-heater
11-14-2008 10:27 AM
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sixmenn Offline
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Post: #9
RE: Amp Meters
I bought a few of these from Harbor Freight because they were on sale for $4 a piece. They are pretty inaccurate, though, as the needle does not operate in the same arc as the gauge does. As a result the needle points at an awkward angle toward the range indicator, leaving you wondering what the heck the amperage really is. I always end up just getting out my multimeter anyway because I just don't quite know how to read the thing. It might work better if you placed your own reference marks on the glass, but it is not useful for taking accurate measurements.

mrbillr Wrote:And if you are trying to keep it cheap, here is one:
http://www.harborfreight.com/cpi/ctaf/di...mber=95778
Sometimes they are on sale $2 less than this.

1994 Camry 2.2L 4 cylinder
Smacks Booster
ZFF EFIE with 50 millivolt offset (still tuning)
IAT parallel 10K resistor
CTS parallel 3.9K resistor (removed for winter)
MAP sensor enhancer
Fuel pre-heater
11-14-2008 12:45 PM
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colchiro Offline
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Post: #10
RE: Amp Meters
If the meters are -50 to +50 amps, they're next to worthless, IMO.

Rick

Links: Documents / Tuning for Mileage | Toyota Sensors | Autoshop Sensor Tutorials
11-14-2008 02:33 PM
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