FieldengInstrumentation & Controls
Engineering Units to 4–20 mA
Expected transmitter current for a known process pressure.
Expected transmitter current for a known process pressure.
App id: INST-03. Reference version 1.0.
How to fill it
Fill the inputs. The tool shows the outputs.
On the tool screen, Calc is the working sheet. Presets stores values you reuse. Reference is the formula, assumptions, and provenance below.
Formula
I = 4 + 16 (EU − L) / (H − L)Inputs
| Name | Unit |
|---|---|
| Engineering value | psi |
| Lower range (LRV) | psi |
| Upper range (URV) | psi |
| Live zero (optional) | mA |
| Live full scale (optional) | mA |
Outputs
| Name | Unit |
|---|---|
| Expected current (hero result) | mA |
| Span | % |
Diagnose
Observations are context. They do not pass or fail a structure. See Diagnose.
| When | Observation | Severity |
|---|---|---|
span fraction < 0 or span fraction > 1 | Outside configured span | caution |
Assumptions
- Engineering dimension is pressure. H ≠ L.
Provenance
- Inverse of linear 4–20 mA scaling. Over-range current is reported, not clamped.