<div dir="ltr">I actually have one of those machines, and I suppose I could do some plumbing to attach it to a Schraeder valve to pressurize the gauge.<br><br>I might just do the rounds of TPMS gauges to see which one most matches those and calibrate everything else to that one.<div><br></div><div>Thanks for everyone's suggestions!</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Apr 26, 2024 at 10:29 PM Pat Horne <<a href="mailto:patintexas@icloud.com">patintexas@icloud.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Many years ago I worked in the Chemical Engineering Department at UT Austin & in their main lab they had an hydraulic/weight calibrator for pressure gauges. If you have a university nearby you might give them a call. Rather than calibrate the entire gauge, you could just find out what one gauge reads @ the tire pressure you use & calibrate any other ones to that gauge. <div><br></div><div>Peace, Pat</div><div><br></div><div><div dir="ltr">Pat Horne <div>We support Habitat for Humanity</div><div><br></div></div><div dir="ltr"><br>On Apr 26, 2024, at 5:36 PM, Bob Spidell <<a href="mailto:bspidell@comcast.net" target="_blank">bspidell@comcast.net</a>> wrote:<br><br></div><div dir="ltr">
I can name at least one place off the top-of-my-head that can
calibrate torque wrenches, but not one that I know of that can
calibrate pressure gauges (I do think some laboratories can do it).<br>
<br>
I have several analog gauges that don't agree (one is adjustable). I
have 3 Accutire digital gauges that all agree with each other and my
Mustang's TPMS; at least I have repeatability. I set tire pressure
according to how the tires wear.<br>
<br>
<br>
<div>On 4/26/2024 10:26 AM,
<a href="mailto:alfuller194@gmail.com" target="_blank">alfuller194@gmail.com</a> wrote:<br>
</div>
<blockquote type="cite">
<div>
<p class="MsoNormal"><span style="font-size:11pt">Sorry for
the late reply – I have no idea where several weeks’ worth
of messages have been hanging out!<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt">It might be
worth checking with someone who already has their gauges
calibrated and comparing readings. I would hope the new car
dealers service department would actually calibrate gauges
used on customer cars, but would ask to be sure. It also
occurs to me that last time I moved the movers damaged my
air compressor, and the insurance company has a local
company that repairs them. I wonder if they have calibrated
gauges, and if one could compare readings with theirs…<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">-----------------------------------<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">All
the best,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif">Al
Fuller<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt"><u></u> <u></u></span></p>
<div style="border-right:none;border-bottom:none;border-left:none;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class="MsoNormal"><b><span style="font-size:11pt;font-family:Calibri,sans-serif">From:</span></b><span style="font-size:11pt;font-family:Calibri,sans-serif">
Shop-talk <a href="mailto:shop-talk-bounces@autox.team.net" target="_blank"><shop-talk-bounces@autox.team.net></a> <b>On
Behalf Of </b>Jeff Scarbrough<br>
<b>Sent:</b> Sunday, April 7, 2024 1:13 PM<br>
<b>To:</b> Benjamin Zwissler <a href="mailto:bjzwissler@gmail.com" target="_blank"><bjzwissler@gmail.com></a><br>
<b>Cc:</b> <a href="mailto:Shop-talk@autox.team.net" target="_blank">Shop-talk@autox.team.net</a><br>
<b>Subject:</b> Re: [Shop-talk] Tire Gauges<u></u><u></u></span></p>
</div>
<p class="MsoNormal"><u></u> <u></u></p>
<div>
<p class="MsoNormal">I know that one foot of water column
equals 0.433 psi. So about 70 feet of 2" pipe attached to
the side of a tall building with a thin diaphragm over a
chamber with a Schrader valve should get you close. Might
need to make a manometer out of it, so you'll need more
pipe.<u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">It's low cost, but not very practical.
I did have a set of weights and an oil reservoir for
calibrating liquid pressure, but liquids are not (for our
purposes) compressible and air is. So I don't know how
accurate that might be.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">If you had some mercury, a 5 foot
column should do the trick. Don't tell the EPD, though.<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<p class="MsoNormal" style="margin-bottom:12pt"><u></u> <u></u></p>
<div>
<div>
<p class="MsoNormal">On Sun, Apr 7, 2024, 15:37 Benjamin
Zwissler <<a href="mailto:bjzwissler@gmail.com" target="_blank">bjzwissler@gmail.com</a>>
wrote:<u></u><u></u></p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class="MsoNormal">I calibrate my Milton (which has
consistently read high) to my wife's tpms value.
Partly because I assume the car is right and partly
because I don't like it when she's telling me a week
later that she's getting low pressure lights again. <u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">I don't know how to create an
inexpensive standard for calibration. The Milton
is the most expensive gauge I have and has been
the least accurate. I looked it up on line and
found lots of similar complaints about its
inaccuracy. <u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Any ideas on creating a low
cost pressure standard for calibration?<u></u><u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal">Ben <u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
</div>
<p class="MsoNormal" style="margin-bottom:12pt"><u></u> <u></u></p>
<div>
<div>
<p class="MsoNormal">On Sun, Apr 7, 2024, 1:49<span style="font-family:Arial,sans-serif"> </span>PM Jeff
Scarbrough <<a href="mailto:fishplate@gmail.com" target="_blank">fishplate@gmail.com</a>>
wrote:<u></u><u></u></p>
</div>
<blockquote style="border-top:none;border-right:none;border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<p class="MsoNormal">So, I have three tire
gauges: Accutire electronic, Jayco
mechanical, and Milton Inflator hose with
gauge. All three report consistently, and all
three are 3-4 psi different - low to high in
the above order.<br>
<br>
Is there a simple way to check accuracy? <u></u><u></u></p>
<div>
<p class="MsoNormal"><u></u> <u></u></p>
</div>
<div>
<p class="MsoNormal"> Jeff <u></u><u></u></p>
<br>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
<span>_______________________________________________</span><br><span></span><br><span><a href="mailto:Shop-talk@autox.team.net" target="_blank">Shop-talk@autox.team.net</a></span><br><span>Donate: <a href="http://www.team.net/donate.html" target="_blank">http://www.team.net/donate.html</a></span><br><span>Suggested annual donation $12.96</span><br><span>Archive: <a href="http://www.team.net/pipermail/shop-talk" target="_blank">http://www.team.net/pipermail/shop-talk</a> <a href="http://autox.team.net/archive" target="_blank">http://autox.team.net/archive</a></span><br><span></span><br><span>Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/shop-talk/patintexas@icloud.com" target="_blank">http://autox.team.net/mailman/options/shop-talk/patintexas@icloud.com</a></span><br><span></span><br></div></div></div>_______________________________________________<br>
<br>
<a href="mailto:Shop-talk@autox.team.net" target="_blank">Shop-talk@autox.team.net</a><br>
Donate: <a href="http://www.team.net/donate.html" rel="noreferrer" target="_blank">http://www.team.net/donate.html</a><br>
Suggested annual donation $12.96<br>
Archive: <a href="http://www.team.net/pipermail/shop-talk" rel="noreferrer" target="_blank">http://www.team.net/pipermail/shop-talk</a> <a href="http://autox.team.net/archive" rel="noreferrer" target="_blank">http://autox.team.net/archive</a><br>
<br>
Unsubscribe/Manage: <a href="http://autox.team.net/mailman/options/shop-talk/fishplate@gmail.com" rel="noreferrer" target="_blank">http://autox.team.net/mailman/options/shop-talk/fishplate@gmail.com</a><br>
<br>
</blockquote></div>