Signal conditioning and scaling in SCADA systems - Step-by-Step Execution

Process Flow - Signal conditioning and scaling

Raw Signal Input

↓

Signal Conditioning

↓

Scaling

↓

Processed Signal Output

The raw signal is first cleaned and prepared by conditioning, then adjusted by scaling to fit the desired range before output.

Execution Sample

SCADA systems

raw_signal = 2.5
conditioned_signal = raw_signal * 1.2 + 0.1
scaled_signal = (conditioned_signal - 0) * (100 - 0) / (5 - 0) + 0

This code conditions a raw signal by amplifying and offsetting it, then scales it from a 0-5V range to a 0-100 unit range.

Process Table

Step	Variable	Calculation	Value
1	raw_signal	Input signal	2.5
2	conditioned_signal	2.5 * 1.2 + 0.1	3.1
3	scaled_signal	(3.1 - 0) * (100 - 0) / (5 - 0) + 0	62.0
4	End	Processed signal ready	62.0

💡 Signal conditioning and scaling complete; output signal is 62.0 units.

Status Tracker

Variable	Start	After Step 1	After Step 2	After Step 3	Final
raw_signal	undefined	2.5	2.5	2.5	2.5
conditioned_signal	undefined	undefined	3.1	3.1	3.1
scaled_signal	undefined	undefined	undefined	62.0	62.0

Key Moments - 2 Insights

Why do we multiply and add values during signal conditioning?

Multiplying amplifies the signal and adding offsets it to correct sensor errors or noise, as shown in step 2 of the execution_table.

Why do we scale the signal after conditioning?

Scaling converts the conditioned signal to a useful range for the system, like converting volts to percentage, as shown in step 3.

Visual Quiz - 3 Questions

Look at the execution_table, what is the value of conditioned_signal at step 2?

A 3.1

B 2.5

C 62.0

D 0

💡 Hint

Check the 'Value' column for step 2 in the execution_table.

At which step does the signal get scaled to the 0-100 range?

A Step 1

B Step 2

C Step 3

D Step 4

💡 Hint

Look for the calculation involving scaling in the execution_table.

If the raw_signal was 5 instead of 2.5, what would scaled_signal be at step 3?

A 50

B 100

C 62

D 0

💡 Hint

Use the scaling formula from step 3 and substitute raw_signal = 5.

Concept Snapshot

Signal conditioning cleans and adjusts raw signals by amplification and offset.
Scaling converts conditioned signals to a desired range.
Typical steps: input raw signal -> condition (multiply/add) -> scale (map range) -> output.
Used to prepare sensor data for control systems.

Full Transcript

Signal conditioning and scaling is a process used in SCADA systems to prepare raw sensor signals for use. First, the raw signal is conditioned by multiplying and adding values to amplify and offset it, correcting errors or noise. Then, the conditioned signal is scaled to a useful range, such as converting voltage to a percentage scale. For example, a raw signal of 2.5 volts is conditioned to 3.1 volts, then scaled to 62 units on a 0-100 scale. This process ensures signals are accurate and compatible with control systems.