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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.
I might just do the rounds of TPMS gauges to see which one most matches
those and calibrate everything else to that one.
Thanks for everyone's suggestions!
On Fri, Apr 26, 2024 at 10:29=E2=80=AFPM Pat Horne <patintexas@icloud.com> =
wrote:
> 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 wha=
t
> one gauge reads @ the tire pressure you use & calibrate any other ones to
> that gauge.
>
> Peace, Pat
>
> Pat Horne
> We support Habitat for Humanity
>
>
> On Apr 26, 2024, at 5:36=E2=80=AFPM, Bob Spidell <bspidell@comcast.net> w=
rote:
>
> =EF=BB=BF I can name at least one place off the top-of-my-head that can c=
alibrate
> 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 =E2=80=93 I have no idea where several weeks=E2=
=80=99 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 servi=
ce
> department would actually calibrate gauges used on customer cars, but wou=
ld
> 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=E2=80=A6
>
>
>
> -----------------------------------
>
> All the best,
>
>
>
> Al Fuller
>
>
>
> *From:* Shop-talk <shop-talk-bounces@autox.team.net>
> <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> <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. Might need to
> make a manometer out of it, so you'll need more pipe.
>
>
>
> 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 (fo=
r
> 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 tpm=
s
> 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.
>
>
>
> 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, 1:49=E2=80=AFPM Jeff Scarbrough <fishplate@gmail.com=
> wrote:
>
> 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.
>
> Is there a simple way to check accuracy?
>
>
>
> Jeff
>
> _______________________________________________
>
> Shop-talk@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.96
> Archive: http://www.team.net/pipermail/shop-talk
> http://autox.team.net/archive
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/shop-talk/patintexas@icloud.com
>
> _______________________________________________
>
> Shop-talk@autox.team.net
> Donate: http://www.team.net/donate.html
> Suggested annual donation $12.96
> Archive: http://www.team.net/pipermail/shop-talk
> http://autox.team.net/archive
>
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/shop-talk/fishplate@gmail.com
>
>
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<div dir=3D"ltr">I actually have one of those machines, and I suppose I cou=
ld do some plumbing to attach it to a Schraeder valve to pressurize the gau=
ge.<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=3D"gmail_=
quote"><div dir=3D"ltr" class=3D"gmail_attr">On Fri, Apr 26, 2024 at 10:29=
=E2=80=AFPM Pat Horne <<a href=3D"mailto:patintexas@icloud.com";>patintex=
as@icloud.com</a>> wrote:<br></div><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);paddi=
ng-left:1ex"><div dir=3D"auto">Many years ago I worked in the Chemical Engi=
neering Department at UT Austin & in their main lab they had an hydraul=
ic/weight calibrator for pressure gauges. If you have a university nearby y=
ou might give them a call. Rather than calibrate the entire gauge, you coul=
d just find out what one gauge reads @ the tire pressure you use & cali=
brate any other ones to that gauge.=C2=A0<div><br></div><div>Peace, Pat</di=
v><div><br></div><div><div dir=3D"ltr">Pat Horne=C2=A0<div>We support Habit=
at for Humanity</div><div><br></div></div><div dir=3D"ltr"><br>On Apr 26, 2=
024, at 5:36=E2=80=AFPM, Bob Spidell <<a href=3D"mailto:bspidell@comcast=
.net" target=3D"_blank">bspidell@comcast.net</a>> wrote:<br><br></div><d=
iv dir=3D"ltr">=EF=BB=BF
=20
=20
=20
=20
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=3D"mailto:alfuller194@gmail.com"; target=3D"_blank">alfuller19=
4@gmail.com</a> wrote:<br>
</div>
<blockquote type=3D"cite">
=20
=20
=20
<div>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt">Sorry for
the late reply =E2=80=93 I have no idea where several weeks=E2=
=80=99 worth
of messages have been hanging out!<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0=
<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"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=E2=80=A6<=
u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0=
<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Ca=
libri,sans-serif">-----------------------------------<u></u><u></u></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Ca=
libri,sans-serif">All
the best,<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Ca=
libri,sans-serif"><u></u>=C2=A0<u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt;font-family:Ca=
libri,sans-serif">Al
Fuller<u></u><u></u></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11pt"><u></u>=C2=A0=
<u></u></span></p>
<div style=3D"border-right:none;border-bottom:none;border-left:none=
;border-top:1pt solid rgb(225,225,225);padding:3pt 0in 0in">
<p class=3D"MsoNormal"><b><span style=3D"font-size:11pt;font-fami=
ly:Calibri,sans-serif">From:</span></b><span style=3D"font-size:11pt;font-f=
amily:Calibri,sans-serif">
Shop-talk <a href=3D"mailto:shop-talk-bounces@autox.team.net"=
target=3D"_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=3D"mailto:bjzwissler@gma=
il.com" target=3D"_blank"><bjzwissler@gmail.com></a><br>
<b>Cc:</b> <a href=3D"mailto:Shop-talk@autox.team.net"; target=
=3D"_blank">Shop-talk@autox.team.net</a><br>
<b>Subject:</b> Re: [Shop-talk] Tire Gauges<u></u><u></u></sp=
an></p>
</div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
<div>
<p class=3D"MsoNormal">I know that one foot of water column
equals 0.433 psi.=C2=A0 So about 70 feet of 2" pipe attach=
ed to
the side of a tall building with a thin diaphragm over a
chamber with a Schrader valve should get you close.=C2=A0 Might
need to make a manometer out of it, so you'll need more
pipe.<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">It's low cost, but not very practica=
l.=C2=A0
=C2=A0I 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.=C2=A0 So I don't know =
how
accurate that might be.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">If you had some mercury, a 5 foot
column should do the trick.=C2=A0 Don't tell the EPD, tho=
ugh.<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><u></u>=C2=A0=
<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Sun, Apr 7, 2024, 15:37 Benjamin
Zwissler <<a href=3D"mailto:bjzwissler@gmail.com"; target=
=3D"_blank">bjzwissler@gmail.com</a>>
wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;border-b=
ottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0in 6pt;m=
argin-left:4.8pt;margin-right:0in">
<div>
<div>
<p class=3D"MsoNormal">I calibrate my Milton (which has
consistently read high) to my wife's tpms value.=C2=
=A0
=C2=A0Partly because I assume the car is right and part=
ly
because I don't like it when she's telling me a=
week
later that she's getting low pressure lights again.=
=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">I don't know how to create a=
n
inexpensive standard for calibration.=C2=A0 =C2=A0The=
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.=C2=A0<u></u><u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Any ideas on creating a low
cost pressure standard for calibration?<u></u><u></u>=
</p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">Ben=C2=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
</div>
<p class=3D"MsoNormal" style=3D"margin-bottom:12pt"><u></=
u>=C2=A0<u></u></p>
<div>
<div>
<p class=3D"MsoNormal">On Sun, Apr 7, 2024, 1:49<span=
style=3D"font-family:Arial,sans-serif">=E2=80=AF</span>PM Jeff
Scarbrough <<a href=3D"mailto:fishplate@gmail.co=
m" target=3D"_blank">fishplate@gmail.com</a>>
wrote:<u></u><u></u></p>
</div>
<blockquote style=3D"border-top:none;border-right:none;=
border-bottom:none;border-left:1pt solid rgb(204,204,204);padding:0in 0in 0=
in 6pt;margin-left:4.8pt;margin-right:0in">
<div>
<p class=3D"MsoNormal">So, I have three tire
gauges:=C2=A0 Accutire electronic, Jayco
mechanical, and Milton Inflator hose with
gauge.=C2=A0 All three report consistently, and=
=C2=A0all
three are 3-4 psi different - low to high in
the above order.<br>
<br>
Is there a simple way to check accuracy?=C2=A0=C2=
=A0<u></u><u></u></p>
<div>
<p class=3D"MsoNormal"><u></u>=C2=A0<u></u></p>
</div>
<div>
<p class=3D"MsoNormal">=C2=A0 =C2=A0 Jeff=C2=A0<u=
></u><u></u></p>
<br>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
</div>
</div>
</div>
</blockquote>
=20
<span>_______________________________________________</span><br><span></spa=
n><br><span><a href=3D"mailto:Shop-talk@autox.team.net"; target=3D"_blank">S=
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eam.net/donate.html" target=3D"_blank">http://www.team.net/donate.html</a><=
/span><br><span>Suggested annual donation =C2=A0$12.96</span><br><span>Arch=
ive: <a href=3D"http://www.team.net/pipermail/shop-talk"; target=3D"_blank">=
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<span></span><br></div></div></div>________________________________________=
_______<br>
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