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=20
Thinking out loud - I don't have a variable DC voltage device.=C2=A0 If I w=
ere to plug a DC output transformer (wall-wart, have plenty of those) into =
an AC variac (have)=C2=A0I should be able to dial in a desired DC output vo=
ltage - yes?=C2=A0 =C2=A0
This will not work.=C2=A0 The wall-warts (plug-in DC power supplies) are v=
oltage regulated and will put out a constant voltage over a range of input =
voltage.=C2=A0 Once you drop below a minimum it will just shut off.
If you can find 100 ohm variable resistor you can simulate the tank sending=
unit and test the gauge that way using a plug-in power supply.
It occurred to me recently that you could swap the fuel and temp gauges but=
I see you are way ahead of me.=C2=A0 Following up you can connect the fuel=
gauge to the temp sender and take a test drive and see if the fuel gauge r=
eads in a manner similar to what you would expect from the temp gauge.
=20
Dave=20
=20
=20
-----Original Message-----
From: aribert neumann <aribertn@gmail.com>
To: triumphs@autox.team.net
Sent: Wed, Oct 12, 2022 10:05 pm
Subject: [TR] Thanks & follow-up - Spit bodied GT6 fuel gage issues
First thanks to Dave & Dave for the guess and confirmation=C2=A0that 67 ohm=
is in the ball park=C2=A0for the sending unit.=C2=A0=C2=A0
Joel - thank you for the very informative fuel/temp gauge calibration sheet=
.=C2=A0 Looking closely at my Smiths gauges, there are double dots at the l=
ow, the midpoint and high - slight graphic variation but easy enough to wor=
k with.=C2=A0 =C2=A0I swapped the leads from the fuel to the temp gauge and=
now the temp gauge reads beyond=C2=A0full scale - that was a surprise!=C2=
=A0 Leads me to believe that I do not have a gauge problem.=C2=A0 =C2=A0I w=
as going to double check the voltage at the gauge=C2=A0and sending=C2=A0uni=
t.=C2=A0I did not realise that I did not have an analog voltmeter at home (=
could have brought one home from my workshop garage today).=C2=A0 =C2=A0It =
is starting to look like a wiring or voltage supply problem (even though th=
e water temp gauge reads normal).
Thinking out loud - I don't have a variable DC voltage device.=C2=A0 If I w=
ere to plug a DC output transformer (wall-wart, have plenty of those) into =
an AC variac (have)=C2=A0I should be able to dial in a desired DC output vo=
ltage - yes?=C2=A0 =C2=A0
** triumphs@autox.team.net **
Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archiv=
e
sey@cs.com
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<div style="color:black;font: 12pt Arial, Helvetica, sans-serif;">
<div> <br>
</div>
<div style="font-family:arial,helvetica;font-size:10pt;color:black"><blockquote
style="border-left: 2px solid blue; padding-left: 3px;">
<div>Thinking out loud - I don't have a variable DC voltage device. If I
were to plug a DC output transformer (wall-wart, have plenty of those) into an
AC variac (have) I should be able to dial in a desired DC output voltage -
yes? </div>
<div></div>
</blockquote></div>
<div> <font size="3">This will not work. The wall-warts (plug-in DC power
supplies) are voltage regulated and will put out a constant voltage over a
range of input voltage. Once you drop below a minimum it will just shut
off.</font></div>
<div><font size="3"><br>
</font></div>
<div><font size="3">If you can find 100 ohm variable resistor you can simulate
the tank sending unit and test the gauge that way using a plug-in power
supply.</font></div>
<div><font size="3"><br>
</font></div>
<div><font size="3">It occurred to me recently that you could swap the fuel and
temp gauges but I see you are way ahead of me. Following up you can
connect the fuel gauge to the temp sender and take a test drive and see if the
fuel gauge reads in a manner similar to what you would expect from the temp
gauge.<br>
</font></div>
<div> <br>
</div>
<div style="clear:both">
<div style="color:black;font:12pt Arial, Helvetica, sans-serif;">
<div style="color:black;font:12pt Arial, Helvetica, sans-serif;">
<div><font size="4">Dave <br>
</font></div>
<div><span style="font-size:10.0pt;font-family:sans-serif;color:black;"><br>
</span></div>
<br>
</div>
</div>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div style="font-family:arial,helvetica;font-size:10pt;color:black"><font
size="2">-----Original Message-----<br>
From: aribert neumann <aribertn@gmail.com><br>
To: triumphs@autox.team.net<br>
Sent: Wed, Oct 12, 2022 10:05 pm<br>
Subject: [TR] Thanks & follow-up - Spit bodied GT6 fuel gage issues<br>
<br>
<div id="yiv5679638902">
<div dir="ltr">First thanks to Dave & Dave for the guess and
confirmation that 67 ohm is in the ball park for the sending
unit.
<div><br>
<div>Joel - thank you for the very informative fuel/temp gauge calibration
sheet. Looking closely at my Smiths gauges, there are double dots at the
low, the midpoint and high - slight graphic variation but easy enough to work
with. I swapped the leads from the fuel to the temp gauge and now
the temp gauge reads beyond full scale - that was a surprise! Leads
me to believe that I do not have a gauge problem. I was going to
double check the voltage at the gauge and sending unit.
I did not realise that I did not have an analog voltmeter at home (could have
brought one home from my workshop garage today). It is starting to
look like a wiring or voltage supply problem (even though the water temp gauge
reads normal).</div>
<div><br>
</div>
<div>Thinking out loud - I don't have a variable DC voltage device. If I
were to plug a DC output transformer (wall-wart, have plenty of those) into an
AC variac (have) I should be able to dial in a desired DC output voltage -
yes? </div>
<div><br>
</div>
<div><br>
</div>
</div>
</div>
</div>
** <a ymailto="mailto:triumphs@autox.team.net";
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **<br>
<br>
Archive: <a href="http://www.team.net/pipermail/triumphs";
target="_blank">http://www.team.net/pipermail/triumphs </a> <a
href="http://www.team.net/archive";
target="_blank">http://www.team.net/archive</a><br>
<br>
</font></div>
</div>
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Archive: http://www.team.net/pipermail/triumphs http://www.team.net/archive
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