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That could be problematic.=C2=A0 If the Stag gauges work like those in the=
TR4-6 there is a voltage stabilizer that maintains a constant average 10 v=
olts on the gauge.=C2=A0 But the original stabilizer is an early form of a =
PWM regulator.=C2=A0 The contacts will alternately apply full battery volts=
and zero on a proportional basis such that the average is 10 volts.=C2=A0 =
And the switching frequency is about one hertz.=C2=A0 The gauges react slow=
ly enough that they average it out just fine but if you put a voltmeter on =
it you will see the voltage switching on and off fast enough that your mete=
r won't have time to settle out and give a meaningful reading.=C2=A0=20
There are after-market stabilizers available that use a solid-state IC volt=
age regulator providing a constant 10 volts.=C2=A0 If you have one of those=
you could get a reliable reading.=C2=A0 But that is if you have one of tho=
se.
All that said, if I had a resistance value for the gauge I could calculate =
what you would get if an IC stabilizer was installed.
=20
Dave=20
=20
=20
-----Original Message-----
From: Sujit Roy <triumphstag@gmail.com>
To: DAVID MASSEY <Dave1massey@cs.com>
Cc: Triumphs <triumphs@autox.team.net>
Sent: Sat, Aug 15, 2020 11:30 am
Subject: Re: [TR] Thermal Transmitter Temperature Sender help
Follow up question. Does anyone have data showing what the voltage at the g=
auge should be=C2=A0 to resistance values.
On Fri, Aug 14, 2020, 12:15 PM DAVID MASSEY <dave1massey@cs.com> wrote:
Here are some data for the TR8.=C2=A0 This might be close enough for the s=
tag:
Temp C=C2=A0=C2=A0=C2=A0 Temp F=C2=A0=C2=A0=C2=A0 Orig ohms=C2=A0=C2=A0 GTR=
110 ohms
50=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 122=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 332=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 290
55=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 131=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 275=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 242
60=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 140=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 227=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 197
65=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 149=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 193=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 169
70=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 158=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 158=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 142
75=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 167=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 134=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 120
80=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 176=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 114=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 102
85=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 185=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 99=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 91
90=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 194=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 85=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 77
95=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 203=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A0=C2=A0 74=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 65
100=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 212=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 60=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 55
105=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 221=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 51=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 48
110=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 230=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 44=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 41
115=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 239=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 37=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 37
120=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 248=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 32=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 31
125=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 257=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 28=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 28
130=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 266=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 24=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 25
135=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 275=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0 21=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 22
If you have a source of resistors in this value range you can connect them =
in lieu of the sensor and check the reading to see if it is close.
=20
Dave=20
=20
=20
-----Original Message-----
From: Sujit Roy <triumphstag@gmail.com>
To: Triumphs <triumphs@autox.team.net>
Sent: Fri, Aug 14, 2020 11:31 am
Subject: [TR] Thermal Transmitter Temperature Sender help
I'm going=C2=A0to try and figure out if my Stag is running hot. The gauge a=
lways reads high=C2=A0
I found a note on another forum on how to test the voltage=C2=A0regulator, =
and another=C2=A0forum how to calibrate the=C2=A0gauge.
I'm trying to figure out how to test the=C2=A0Thermal Transmitter Temperatu=
re Sender. Does anyone have any data on how the resistance=C2=A0changes wit=
h temperature?
Since=C2=A0most Triumph around the 70's used Smith gauges, I'm assuming the=
data for the=C2=A0Thermal Transmitter Temperature Sender would be the same=
.
Regards, Sujit
--=20
Sujit Roy
Cupertino, California
https://triumphstagblog.wordpress.com/
** 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> <font size="3">That could be problematic. If the Stag gauges work
like those in the TR4-6 there is a voltage stabilizer that maintains a constant
average 10 volts on the gauge. But the original stabilizer is an early
form of a PWM regulator. The contacts will alternately apply full battery
volts and zero on a proportional basis such that the average is 10 volts.
And the switching frequency is about one hertz. The gauges react slowly
enough that they average it out just fine but if you put a voltmeter on it you
will see the voltage switching on and off fast enough that your meter won't
have time to settle out and give a meaningful reading. <br>
</font></div>
<div><font size="3"><br>
</font></div>
<div><font size="3">There are after-market stabilizers available that use a
solid-state IC voltage regulator providing a constant 10 volts. If you
have one of those you could get a reliable reading. But that is if you
have one of those.</font></div>
<div><font size="3"><br>
</font></div>
<div><font size="3">All that said, if I had a resistance value for the gauge I
could calculate what you would get if an IC stabilizer was installed.</font><br>
</div>
<div> <br>
</div>
<div style="clear:both"><font size="4">Dave </font><br>
<br>
</div>
<div> <br>
</div>
<div> <br>
</div>
<div
style="font-family:arial,helvetica;font-size:10pt;color:black">-----Original
Message-----<br>
From: Sujit Roy <triumphstag@gmail.com><br>
To: DAVID MASSEY <Dave1massey@cs.com><br>
Cc: Triumphs <triumphs@autox.team.net><br>
Sent: Sat, Aug 15, 2020 11:30 am<br>
Subject: Re: [TR] Thermal Transmitter Temperature Sender help<br>
<br>
<div id="yiv4365019461">
<div>
<div>Follow up question. Does anyone have data showing what the voltage at the
gauge should be to resistance values.</div>
<br clear="none">
<div class="yiv4365019461yqt1673503800" id="yiv4365019461yqt12730">
<div class="yiv4365019461gmail_quote">
<div class="yiv4365019461gmail_attr" dir="ltr">On Fri, Aug 14, 2020, 12:15 PM
DAVID MASSEY <<a rel="nofollow" shape="rect"
ymailto="mailto:dave1massey@cs.com"; target="_blank"
href="mailto:dave1massey@cs.com";>dave1massey@cs.com</a>> wrote:<br
clear="none"></div>
<blockquote class="yiv4365019461gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div style="color:black;font:12pt Arial, Helvetica, sans-serif;">
<div> <font size="3">Here are some data for the TR8. This might be close
enough for the stag:<br clear="none">
</font></div>
<div><font size="3">Temp C Temp F Orig
ohms GTR110 ohms<br clear="none">
50
122
332 290<br clear="none">
55
131
275 242<br clear="none">
60
140
227 197<br clear="none">
65
149
193 169<br clear="none">
70
158
158 142<br clear="none">
75
167
134 120<br clear="none">
80
176
114 102<br clear="none">
85
185
99 91<br clear="none">
90
194
85 77<br clear="none">
95
203
74 65<br clear="none">
100 212
60 55<br clear="none">
105 221
51 48<br clear="none">
110 230
44 41<br clear="none">
115 239
37 37<br clear="none">
120 248
32 31<br clear="none">
125 257
28 28<br clear="none">
130 266
24 25<br clear="none">
135 275
21 22<br clear="none">
</font></div>
<div><font size="3"><br clear="none">
</font></div>
<div><font size="3"><br clear="none">
</font></div>
<div><font size="3">If you have a source of resistors in this value range you
can connect them in lieu of the sensor and check the reading to see if it is
close.</font><br clear="none">
</div>
<div> <br clear="none">
</div>
<div style="clear:both;"><font size="4">Dave </font><br clear="none">
<br clear="none">
</div>
<div> <br clear="none">
</div>
<div> <br clear="none">
</div>
<div style="font-family:arial,
helvetica;font-size:10pt;color:black;">-----Original Message-----<br
clear="none">
From: Sujit Roy <<a rel="nofollow" shape="rect"
ymailto="mailto:triumphstag@gmail.com"; target="_blank"
href="mailto:triumphstag@gmail.com";>triumphstag@gmail.com</a>><br
clear="none">
To: Triumphs <<a rel="nofollow" shape="rect"
ymailto="mailto:triumphs@autox.team.net"; target="_blank"
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a>><br
clear="none">
Sent: Fri, Aug 14, 2020 11:31 am<br clear="none">
Subject: [TR] Thermal Transmitter Temperature Sender help<br clear="none">
<br clear="none">
<div id="yiv4365019461m_-1604197066133898725yiv7413154317">
<div dir="ltr">I'm going to try and figure out if my Stag is running hot.
The gauge always reads high
<div><br clear="none">
</div>
<div>I found a note on another forum on how to test the voltage regulator,
and another forum how to calibrate the gauge.</div>
<div><br clear="none">
</div>
<div>I'm trying to figure out how to test the Thermal Transmitter
Temperature Sender. Does anyone have any data on how the
resistance changes with temperature?</div>
<div><br clear="none">
</div>
<div>Since most Triumph around the 70's used Smith gauges, I'm assuming
the data for the
Thermal Transmitter Temperature Sender would be the same.</div>
<div><br clear="none">
</div>
<div>Regards, Sujit<br clear="all">
<div><br clear="none">
</div>
-- <br clear="none">
<div dir="ltr">
<div dir="ltr">
<div>Sujit Roy<br clear="none">
Cupertino, California</div>
<div><br clear="none">
<a rel="nofollow" shape="rect" target="_blank"
href="https://triumphstagblog.wordpress.com/";>https://triumphstagblog.wordpress.com/</a><br
clear="none">
<br clear="none">
</div>
</div>
</div>
</div>
</div>
</div>
** <a rel="nofollow" shape="rect" ymailto="mailto:triumphs@autox.team.net";
target="_blank"
href="mailto:triumphs@autox.team.net";>triumphs@autox.team.net</a> **<br
clear="none">
<br clear="none">
Archive: <a rel="nofollow" shape="rect" target="_blank"
href="http://www.team.net/pipermail/triumphs";>http://www.team.net/pipermail/triumphs
</a> <a rel="nofollow" shape="rect" target="_blank"
href="http://www.team.net/archive";>http://www.team.net/archive</a><br
clear="none">
<br clear="none">
</div>
</div>
</blockquote></div>
</div>
</div>
</div>
</div>
</div>
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