Data acquisition system book pdf

data acquisition system with a software- selectable range can measure different ranges on different channels (but at a relatively slow rate) with a command to change the gain between samples.
But the technique has two problems.
First, it is relatively slow.

Data acquisition systems, however, do not typically read ohms directly; they measure voltages and voltage ratios across known and unknown resistance dividers and compute equivalent resistor values.
Resistance voltage divider circuits can use either single-ended or differential-input amplifiers. (Refer to Figure 4.10.) .

This book describes the fundamentals of data acquisition systems, how they enable users to sample signals that measure real physical conditions and convert the resulting samples into digital, numeric values that can be analyzed by a computer.