4–20 mA to 0–5 m: scaling table
A transmitter calibrated 0–5 m: 4 mA = 0 m, 20 mA = 5 m. Linear output.
At a glance
- Span
- 5 m
- Change per 1 mA
- 0.3125 m
- Change per 1 %
- 0.05 m
- Value at 12 mA
- 2.5 m
Scaling table
| Current (mA) | Output (%) | Value (m) |
|---|---|---|
| 4.00 | 0 % | 0 |
| 6.00 | 12.5 % | 0.625 |
| 8.00 | 25 % | 1.25 |
| 10.00 | 37.5 % | 1.875 |
| 12.00 | 50 % | 2.5 |
| 14.00 | 62.5 % | 3.125 |
| 16.00 | 75 % | 3.75 |
| 18.00 | 87.5 % | 4.375 |
| 20.00 | 100 % | 5 |
NAMUR NE 43 limits in m
| Current (mA) | Value (m) | Meaning |
|---|---|---|
| 3.6 | -0.125 | Failure signal, downscale (≤ 3.6 mA) |
| 3.8 | -0.0625 | Lower measuring limit (3.8 mA) |
| 20.5 | 5.15625 | Upper measuring limit (20.5 mA) |
| 21.0 | 5.3125 | Failure signal, upscale (≥ 21 mA) |
Formula
PV = 0 + (I − 4) / 16 × 5 m
Example: a reading of 13.6 mA corresponds to 3 m. Going the other way, 3.75 m corresponds to 16 mA.
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