You need to find the resistance required the guage read full using the
method David described. Then use an Ohm meter to measure the resistance of
the sending unit when set to full. If the resistance needed is greater than
the sending unit actual resistance then (resistance for full reading on
gauge) - (resistance of sending unit)= resistance needed in series. If the
resistance needed is less than the sending unit at full then make
(resistance needed)= R1 in Richard's formula and solve for R2 which will go
in parallel.
Jim Altman jaltman@altlaw.com Illigitimi non Carborundum
http://www.altlaw.com/metro/jaltman.html 69-TR6 76-TR7 80-TR8 W4UCK
-----Original Message-----
From: owner-triumphs@autox.team.net
[mailto:owner-triumphs@autox.team.net]On Behalf Of Malcolm Walker
Sent: Saturday, May 27, 2000 2:37 PM
To: triumphs@autox.team.net
Subject: Gas Gauge Oddities
I'm trying to get my fuel gauge to work properly. Before, it would
always read 1/4 tank if the level was > 1/2 in the tank, and read
properly below that (although sometimes it would read 3/8)
I've got a new(er) tank sending unit from a TR6. Now, (just by putting
the sender into the circuit and holding the float at its limits) I get
correct readings for Empty but Full puts the needle pointer at just
below half.
Any suggestions? When I pull the sender out of the circuit and short
the leads (~0 resistance), it reads just under 3/4 tank. So either
something's too resistive or something's not getting enough power.
Where do I start?
Thanks in advance...
-Malcolm
----
To know that which you do not know, is the best.
--Confucious
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