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Listen to Bob 200

posted by  Gregg Shadduck on  Wed Sep 29 02:39 CST 2010
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last visit: Fri Mar 7 12:10 CST 2014
[RELATED]

"True answers" and "hard data" will be especially hard to come by with a low-resolution tool like a vacuum gauge, I think.

It has, what?, a sub-2" face? What accuracy can you derive from that? These little automotive gauges are intrinsically analog, rough, relative. Do you really want to go shopping for a more accurate gauge, say with a 4" dial? And if you did, what would its precision MEAN?

A vacuum gauge is not, for instance, a micrometer, or even a less accurate dial caliper.

This airy-fairy tool's strength seems to be RELATIVE (Is this against your grain?) across TIME:
1. In same vehicle, over its life to note long-term trends.
2. An any vehicle, over minutes or seconds of operation, to note fluctuations.

Not like I am a doctor or anything, but the vacuum gauge seems more like a stethoscope than an MRI: innovative in its time, and still meaningful and useful, but relying strongly on interpretation, rather than precision.






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