Measurements with digital instruments (voltmeters, data acquisition units, etc.) have properties that depend upon the circuitry in the instruments, including properties of the data converters used.  You need to understand those properties because they affect the accuracy of the measurements, the price of the instruments and the speed (data rate) of the instruments.

• What do you need to know about digital instrument measurements?
• You need to learn about converters:
• Digital-to-Analog (D/A) converters.
• Analog-to-Digital (A/D) converters.
• Instrument Data
• You need to learn about how converter "size" (i.e. 8 bits, 10 bits, etc.) affects data representation and choice of scales.
• Digital Voltmeters (Scales vs # bits, etc.)