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265
Chapter 7 Tutorial
Measurement Fundamentals
4
7
Measurement Fundamentals
This section explains how the 34970A/34972A makes measurements and
discusses the most common sources of error related to these
measurements.
The Internal DMM
The internal DMM provides a universal input front-end for measuring a
variety of transducer types without the need for additional external
signal conditioning. The internal DMM includes signal conditioning,
amplification (or attenuation), and a high resolution (up to 22 bits)
analog-to-digital converter. A simplified diagram of the internal DMM is
shown below.
For complete details on the operation of the internal DMM,
refer to “Measurement Input” on
page 74.
The internal DMM can directly make the following types of
measurements. Each of these measurements is described in the following
sections of this chapter.
• Temperature (thermocouple, RTD, and thermistor)
• Voltage (dc and AC up to 300V)
• Resistance (2-wire and 4-wire up to 100 M
)
• Current (dc and AC up to 1A)
• Frequency and Period (up to 300 kHz)
To/From
Earth
Referenced
Section
= Optical Isolators
Amp
Signal
Conditioning
Analog to
Digital
Converter
Main
Processor
Analog
Input
Signal
34970A Refresh UG.book Page 265 Wednesday, February 17, 2010 12:34 PM
Содержание 34970A
Страница 16: ...16 34970A Refresh UG book Page 16 Wednesday February 17 2010 12 34 PM ...
Страница 20: ...34970A Refresh UG book Page 20 Wednesday February 17 2010 12 34 PM ...
Страница 21: ...1 1 Quick Start 34970A Refresh UG book Page 21 Wednesday February 17 2010 12 34 PM ...
Страница 39: ...2 2 Front Panel Overview 34970A Refresh UG book Page 39 Wednesday February 17 2010 12 34 PM ...
Страница 59: ...3 3 System Overview 34970A Refresh UG book Page 59 Wednesday February 17 2010 12 34 PM ...
Страница 87: ...4 4 Features and Functions 34970A Refresh UG book Page 87 Wednesday February 17 2010 12 34 PM ...
Страница 217: ...5 5 Error Messages 34970A Refresh UG book Page 217 Wednesday February 17 2010 12 34 PM ...
Страница 240: ...240 Chapter 5 Error Messages Plug In Module Errors 34970A Refresh UG book Page 240 Wednesday February 17 2010 12 34 PM ...
Страница 241: ...6 6 Application Programs 34970A Refresh UG book Page 241 Wednesday February 17 2010 12 34 PM ...
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Страница 255: ...7 7 Tutorial 34970A Refresh UG book Page 255 Wednesday February 17 2010 12 34 PM ...
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