Measurement Matters

2000

Don't whine--calibrate.

by Stein, Philip

Decreasing quality costs while increasing measurement confidence

The calibration interval is an economic tradeoff in which you balance the frequency of calibration against the cost of calibration and against the potential consequences and costs of not calibrating. We must learn how the tool's factors work, understand t...


Calibration buyers, beware!

by Stein, Philip

What to look for when considering a commercial calibration laboratory

The calibration interval is therefore an economic tradeoff in which you balance the frequency of calibration against the cost of calibration and against the potential consequences and costs of not calibrating. In addition, all standards and regulations th...


Quality tools for metrology.

by Stein, Philip

Many quality professionals need and use measurements every day in their work--from business measurements in quality management to dimensional and electrical measurements in manufacturing, research or design. Measurement assurance is a system of processes,...


The philosophy of metrology.

by Stein, Philip

His classic text, Electrical Measurements,1 is still fresh even though many technical approaches to electrical measurements have changed since it was written. The problems and difficulties of precise measurement increase very rapidly as accuracy requireme...


How Hot Is Hot?

by Stein, Philip

Building, using and calibrating thermocouples

When two thermocouple wires are connected to a voltmeter or compensator, two more thermocouples are created--each where a thermocouple wire connects to a voltmeter terminal (which is made of a different metal from that of the thermocouple wire). Thermocou...


Careful interpolation yields useful information.

by Stein, Philip

Tips for getting extra resolution in measurements

I do my best to estimate readings between dial divisions--a practice often called interpolation--thus adding another digit of resolution beyond that engraved on the scale. After consulting and quoting some of the literature, Weaver conducted a study with ...



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