Transmitter linearity

What this tool does

Five-point calibration error and terminal-based linearity as a percent of span. This page says what the tool is for, in plain language. The working formula stays on the signed-in tool.

When to use it

Open Transmitter linearity when this is the job: Five-point calibration error and terminal-based linearity as a percent of span. That is usually a loop check, a range change, or a signal that does not match the panel.

Step-by-step

1. Open Transmitter linearity from the tool list.
2. Fill Units, LRV, URV, Tolerance from the instrument, the drawing, or the job record. Use the unit shown beside each field.
3. Fill the remaining fields the same way. Skip a field only when the screen marks it optional.
4. Run Calculate when that control is on the page, then read every result row and any warning.
5. Check the result against the site procedure and the manufacturer data before you change a range, a wire, a setpoint, or a weight.
6. This help page is public. Opening the tool still requires a Pro session.

Inputs

Units

Imperial or metric. Pick one and enter every other field in that system.

LRV

Lower range value. The process reading at the bottom of the calibrated span.

URV

Upper range value. The process reading at the top of the calibrated span.

Tolerance

Tolerance is the value you read from the instrument, the drawing, or the job record. Enter it in % span.

As-found 0%

As-found 0% is the value you read from the instrument, the drawing, or the job record.

As-found 25%

As-found 25% is the value you read from the instrument, the drawing, or the job record.

As-found 50%

As-found 50% is the value you read from the instrument, the drawing, or the job record.

As-found 75%

As-found 75% is the value you read from the instrument, the drawing, or the job record.

As-found 100%

As-found 100% is the value you read from the instrument, the drawing, or the job record.

Results

Result

The reported value for Transmitter linearity. Use the unit printed on that row.

Warnings

A warning means an entry is incomplete or outside what this tool will stand behind. Recheck the inputs and the site procedure.

Common mistakes

• Swapping the lower range and the upper range, or typing the live reading into a range field.
• Treating a square-root flow signal as if it were a linear span.
• Changing a range while a warning is still on the screen.
• Do not treat a result from Transmitter linearity as a substitute for the site procedure or the manufacturer data.

Standards references

These are the standards and public references named on this tool. Clause numbers appear only when the catalog already cites them.

• ISA-51.1 terminal-based linearity, percent of ideal output span
• Five-point calibration at 0, 25, 50, 75, and 100 percent

Offline and access

This engine can run offline after the server has cached it for the signed-in account.

A free session can read this help page. The tool card shows the name and the short summary. Opening the tool requires Pro.