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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).
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.
On 4/26/2024 10:26 AM, alfuller194@gmail.com wrote:
>
> Sorry for the late reply â?? I have no idea where several weeksâ?? worth
> of messages have been hanging out!
>
> 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 theirsâ?¦
>
> -----------------------------------
>
> All the best,
>
> Al Fuller
>
> *From:*Shop-talk <shop-talk-bounces@autox.team.net> *On Behalf Of
> *Jeff Scarbrough
> *Sent:* Sunday, April 7, 2024 1:13 PM
> *To:* Benjamin Zwissler <bjzwissler@gmail.com>
> *Cc:* Shop-talk@autox.team.net
> *Subject:* Re: [Shop-talk] Tire Gauges
>
> 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.Â
> Might need to make a manometer out of it, so you'll need more pipe.
>
> It's low cost, but not very practical. Â 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.
>
> If you had some mercury, a 5 foot column should do the trick. Don't
> tell the EPD, though.
>
> On Sun, Apr 7, 2024, 15:37 Benjamin Zwissler <bjzwissler@gmail.com> wrote:
>
> I calibrate my Milton (which has consistently read high) to my
> wife's tpms value. Â 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.
>
> 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.
>
> Any ideas on creating a low cost pressure standard for calibration?
>
> Ben
>
> On Sun, Apr 7, 2024, 1:49â?¯PM Jeff Scarbrough <fishplate@gmail.com>
> wrote:
>
> So, I have three tire gauges:Â 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.
>
> Is there a simple way to check accuracy?
>
> Â Â Jeff
>
>
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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 class="moz-cite-prefix">On 4/26/2024 10:26 AM,
<a class="moz-txt-link-abbreviated"
href="mailto:alfuller194@gmail.com";>alfuller194@gmail.com</a> wrote:<br>
</div>
<blockquote type="cite"
cite="mid:075301da97fe$f1882610$d4987230$@gmail.com">
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<div class="WordSection1">
<p class="MsoNormal"><span style="font-size:11.0pt">Sorry for
the late reply â?? I have no idea where several weeksâ?? worth
of messages have been hanging out!<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt">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
theirsâ?¦<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">-----------------------------------<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">All
the best,<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif"><o:p>Â </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">Al
Fuller<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt"><o:p>Â </o:p></span></p>
<div
style="border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span
style="font-size:11.0pt;font-family:"Calibri",sans-serif">
Shop-talk <a class="moz-txt-link-rfc2396E"
href="mailto:shop-talk-bounces@autox.team.net";><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 class="moz-txt-link-rfc2396E"
href="mailto:bjzwissler@gmail.com";><bjzwissler@gmail.com></a><br>
<b>Cc:</b> <a class="moz-txt-link-abbreviated"
href="mailto:Shop-talk@autox.team.net";>Shop-talk@autox.team.net</a><br>
<b>Subject:</b> Re: [Shop-talk] Tire Gauges<o:p></o:p></span></p>
</div>
<p class="MsoNormal"><o:p>Â </o:p></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.<o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
<div>
<p class="MsoNormal">It's low cost, but not very practical.Â
 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.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p>Â </o:p></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.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
<p class="MsoNormal" style="margin-bottom:12.0pt"><o:p>Â </o:p></p>
<div>
<div>
<p class="MsoNormal">On Sun, Apr 7, 2024, 15:37 Benjamin
Zwissler <<a href="mailto:bjzwissler@gmail.com";
moz-do-not-send="true"
class="moz-txt-link-freetext">bjzwissler@gmail.com</a>>
wrote:<o:p></o:p></p>
</div>
<blockquote
style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in
6.0pt;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.Â
 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. <o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p>Â </o:p></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. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
<div>
<p class="MsoNormal">Any ideas on creating a low
cost pressure standard for calibration?<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
<div>
<p class="MsoNormal">Ben <o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
</div>
<p class="MsoNormal"
style="margin-bottom:12.0pt"><o:p>Â </o:p></p>
<div>
<div>
<p class="MsoNormal">On Sun, Apr 7, 2024, 1:49<span
style="font-family:"Arial",sans-serif">â?¯</span>PM Jeff
Scarbrough <<a
href="mailto:fishplate@gmail.com";
target="_blank" moz-do-not-send="true"
class="moz-txt-link-freetext">fishplate@gmail.com</a>>
wrote:<o:p></o:p></p>
</div>
<blockquote
style="border:none;border-left:solid #CCCCCC 1.0pt;padding:0in 0in 0in
6.0pt;margin-left:4.8pt;margin-right:0in">
<div>
<p class="MsoNormal">So, I have three tire
gauges:Â 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?  <o:p></o:p></p>
<div>
<p class="MsoNormal"><o:p>Â </o:p></p>
</div>
<div>
<p class="MsoNormal">  Jeff <o:p></o:p></p>
<br>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</body>
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