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What is the resolution of a digital voltmeter that has a read-out range from 0 to 9,999 counts and a full-scale reading of 9.999V?
If a moving coil voltmeter has a full-scale reading of 200V and 100 divisions, what is the estimated value for 1/10 of a scale division?
For a thermometer with a range of 5000°C and an accuracy of +0.5% of scale range, what is the maximum error in temperature measurement?
What percent error is calculated from a resistor with a color code of Red, Brown, Green, Gold, if it reads 2.05 mega ohms?
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Which color code corresponds to a resistor reading of 20.24 mega ohms?
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What is the primary purpose of accuracy in instrumentation?
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In the context of a moving coil voltmeter, what does resolution refer to?
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What does a color code of Red, Black, Blue, Gold signify in terms of resistance?
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When calculating the percent error for a measured value, what formula should be used?
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What is the significance of a digital voltmeter's read-out range from 0 to 9,999 counts?
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Which of the following statements is true regarding the accuracy of instrumentation?
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Study Notes
Basic Principles of Instrumentation and Control
- Accuracy of instruments, such as a thermometer with a range of 5000°C, can be quantified as ±0.5% of the scale range.
- Example calculation: A moving coil voltmeter with 100 divisions and a full-scale reading of 200V allows estimation of resolution as 1/10 of a scale division.
- The resolution of this instrument can be calculated by determining the smallest voltage change detectable on the scale.
Digital Voltmeter Resolution
- A digital voltmeter with a display range from 0 to 9,999 counts offers a distinct resolution at full-scale of 9.999V.
- The resolution in this case is determined by the smallest count increment on the display relative to the maximum voltage.
Ohmmeter Measurements and Accuracy
- A resistor with a color code of Red, Brown, Green, Gold (2.05 Megaohm) can be assessed for percent error and accuracy when measured with an ohmmeter.
- Another resistor coded Red, Black, Blue, Gold (20.24 Megaohm) can similarly be evaluated for accuracy and percent error using its measured value.
- Percent error and accuracy calculations are essential for verifying the performance of measuring instruments.
Elements of Electronic Instruments
- Understanding common components and metrics of electronic instruments is crucial for proper measurement and control in engineering applications.
Basic Principles of Instrumentation and Control
- Accuracy of instruments, such as a thermometer with a range of 5000°C, can be quantified as ±0.5% of the scale range.
- Example calculation: A moving coil voltmeter with 100 divisions and a full-scale reading of 200V allows estimation of resolution as 1/10 of a scale division.
- The resolution of this instrument can be calculated by determining the smallest voltage change detectable on the scale.
Digital Voltmeter Resolution
- A digital voltmeter with a display range from 0 to 9,999 counts offers a distinct resolution at full-scale of 9.999V.
- The resolution in this case is determined by the smallest count increment on the display relative to the maximum voltage.
Ohmmeter Measurements and Accuracy
- A resistor with a color code of Red, Brown, Green, Gold (2.05 Megaohm) can be assessed for percent error and accuracy when measured with an ohmmeter.
- Another resistor coded Red, Black, Blue, Gold (20.24 Megaohm) can similarly be evaluated for accuracy and percent error using its measured value.
- Percent error and accuracy calculations are essential for verifying the performance of measuring instruments.
Elements of Electronic Instruments
- Understanding common components and metrics of electronic instruments is crucial for proper measurement and control in engineering applications.
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Description
This quiz focuses on the basic principles of instrumentation and control within the context of process engineering. It covers topics such as accuracy and resolution of measuring instruments, including thermometers and voltmeters. Gain a better understanding of these fundamental concepts crucial for process control.
