documentation.HELP! NI Digital Multimeters Documentation

Measurement Considerations

NI Digital Multimeters

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Measurement Considerations

When taking measurements with a DMM, consider the following:

• Normal and common-mode signals
• Normal-mode rejection ratio (NMRR)
• Common-mode rejection ratio (CMRR)
• Effective common-mode rejection ration (ECMRR)
• Input resistance
• Burden voltage
• Thermal voltages
• Settling time
• Resistor self-heating
• Dielectric absorption
• Residual impedance
• Stray admittance

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