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COPYRIGHT 1994 Poptronix, Inc.
When you want to step up to a better handheld digital multimeter, step up to a Hewlett-Packard.
If you are a typical Electronics Now reader, you probably own your own handheld digital multimeter (DMM). Chances are you bought it years ago when you transitioned from an analog multimeter, or perhaps you bought it when you got interested in building circuits at home. Even if your handheld meter is more than ten years old, it can probably perform all of the basic AC and DC measurements and is still in good working condition. However, you might have a hankering for those extra features that you have read about.
The declining price of electronic components and the increasing complexity of ICs with ever more on-chip functions have made it possible for manufacturers to cram more user friendly features into the latest-generation DMMs. And they have done it with little or no increase in price. When you learn about the price-performance relationships, you'll probably want to retire your old model and get a newer, more powerful model.
This introduction leads into a discussion of Hewlett-Packard's new HP 970 series of multimeters (the HP 971A, 972A, 973A, and 974A). All of these handheld instruments measure AC and DC voltage, frequency, current, and resistance. In addition, they offer continuity and diode testing,...
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