#x27; come back.
Leslie.
(finally some use for my science degrees) ;-)
On Sat, 4/4/15, Josh Muckley via CnC-List wrote:
Subject: Re: Stus-List Problem with 2 new fuel gauges...long story
To: "C&C List" , "Marek Dziedzic"
D
Stus-List Problem with 2 new fuel gauges...long story
To: w...@wbryant.com, "C&C List"
Date: Saturday, April 4, 2015, 6:13 PM
All analog
meters are just measuring the "voltage drop"
across a resistance. The key is to have the appropriate
voltage input +12v. If the +
strictly speaking the fuel gauge measures current. ;-)
Leslie.
On Sat, 4/4/15, Wally Bryant via CnC-List wrote:
Subject: Re: Stus-List Problem with 2 new fuel gauges...long story
To: cnc-list@cnc-list.com
Date: Saturday, April 4, 2015, 4:07 PM
One terminal of the sender connects to the plate that mounts to the tank--this
is grounded because the tank is grounded. So, polarity is involved here. I
can remove the tank ground and switch the wires.
Bob Boyer
S/V Rainy Days / Annapolis MD
1983 C&C Landfall 38 - Hull #230
email: dainyr...@i
The actual meter portion of analog meters are essentially the same (Volt,
Amp, Ohm) they register the voltage presented to them. The way the are
placed in the circuit makes the difference. Volt meter across the voltage,
Amp across a shunt (a low resistance resistor) to measure the voltage drop
ac
The sender doesn't have a polarity. It is just a resistance. Is this what
the back of your sender looks like? Which wires do you have attached where?
Josh
On Apr 4, 2015 10:49 PM, "Robert Boyer via CnC-List"
wrote:
> When you connect the sensing wire to ground, the needle goes positive all
>
Excerpt from the following link:
http://www.doityourself.com/stry/how-does-an-analog-voltmeter-work
An analog voltmeter works by passing a current through a coil that is
suspended between two permanent magnets. This coil of wire is known
Okay, I'm grinning. Now we have ammeters, voltmeters, and ohmmeters.
Let's all just have a beer and admit that we don't really understand
anything at all.
I have noticed that when the house bank is low, my WEMA fuel gauge also
reads low. I've always wondered why, and figured that it had so
When you connect the sensing wire to ground, the needle goes positive all the
way as it should do but it does not register the fuel level.
I now believe that one gauge is working correctly because the needle moved
slightly positive when energized--but the tank is completely empty.
The other gau
Josh,
This is certainly not sailing related, but if i remember it correctly, they are
all really ammeters (the current flowing through them creates the magnetic
field that moves the needle).
Marek
Josh Muckley via CnC-List wrote:
All analog meters are just measuring the "voltage drop" across
It's okay Josh.
Wally is a geek, he knows. I think he was just entertaining himself.
Maybe it gets lonely sometimes in Mexico after the sun goes down. :)
Cheers, Russ
east side, Vancouver Island
At 06:13 PM 04/04/2015, you wrote:
All analog meters are just measuring the "voltage dro
All analog meters are just measuring the "voltage drop" across a
resistance. The key is to have the appropriate voltage input +12v. If the
+12v and the sensing line were reversed then the "voltage drop" would be
"negative" driving the needle to the empty peg.
Josh
On Apr 4, 2015 7:08 PM, "Wally
I thought they were Ohm meters. Anyway, I just Googled it to make sure,
and see a ton of pages on testing marine fuel sender resistance.
Wal
you wrote:
I agree with your diagnosis. It's gotta be reversed polarity...of the
sense and gnd. Fundamentally the fuel gages are just voltage meters.
I agree with your diagnosis. It's gotta be reversed polarity...of the
sense and gnd. Fundamentally the fuel gages are just voltage meters. They
respond proportionally to the voltage drop across the variable resistance
in the sender. I would disconnect the leads and use an ohm meter to
measure a
I'm sharing an electrical problem right now in the hope that someone here on
this list has had a similar problem and solved it...
Over the winter I added an auxiliary 19-gallon diesel tank under the nav
station seat. I decided to buy 2 new fuel gauges, one for the new auxiliary
fuel tank and t
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