[Shop-talk] Tire Gauges

[alfuller194 at gmail.com]

Sorry for the late reply – I have no idea where several weeks’ 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 theirs…

 

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All the best,

 

Al Fuller

 

From: Shop-talk <shop-talk-bounces at autox.team.net> On Behalf Of Jeff Scarbrough
Sent: Sunday, April 7, 2024 1:13 PM
To: Benjamin Zwissler <bjzwissler at gmail.com>
Cc: Shop-talk at 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 (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 at gmail.com <mailto:bjzwissler at gmail.com> > wrote:

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. 

 

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 PM Jeff Scarbrough <fishplate at gmail.com <mailto:fishplate at 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 

    Corrosion Acres, Ga.

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