Objectives

• Explain what normalizing is, and why it's done.
• Complete sample normalizing problems using the normalizing equation.

What Is Normalizing?

Normalizing is the conversion of any standard instrumentation signal to a percentage of the controlled parameter, or vice versa.

This is so common in instrumentation that there is a formula for it.

Required Value = n% x (Span) + Lower Range Value

Not sure about Span and Range? Check out Range, Zero, & Span in the Sensors, Transducers, and Transmitters lesson.

Why?

Normalizing is important because you are almost always working with two different scales when using sensors to report data.

Examples include

• pressure
• temperature
• distance
Control Loop Range

Examples include

• 4-20 mA
• 1-5 V
• 3-15 psi

"Normalizing" data just means converting it to a percentage, so that you can find its equivalent value on a different scale.

Let's walk through some examples!

This is just a preview!

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