4to20.com

4to20.com Industrial Signal Calculators & Diagnostics

Engineering Low

Engineering High

Raw Low

Raw High

Engineering Units

Enter mA

Enter %

Process Value

1000.00 PSI

Current

12.00 mA

Raw Value

16000

Quick Presets

Auto-populated from the ranges set in the Scaling Calculator tab.

Span %	Current	Process Value	Raw Value

Sensor Wire Break / Open Loop< 3.6 mA

Under-Range Signal3.6 – 4.0 mA

Normal Measurement Span4.0 – 20.0 mA

Over-Range Signal20.0 – 20.5 mA

Sensor Short / High Saturation> 21.0 mA

Enter live loop reading (mA)

Normal Measurement Span

Loop Supply Voltage (VDC)

Transmitter Min Operating Voltage (VDC)

Total Wire Resistance (Ω)

Receiver / Load Resistance (Ω)

Max Allowable Resistance

600.0 Ω

Actual Loop Resistance

280.0 Ω

Headroom

320.0 Ω

Loop OK — within supply capability

R_max = (V_supply − V_tx min) / 0.020 A. If actual resistance (wire + load) exceeds R_max, the transmitter cannot be guaranteed to drive a full 20 mA signal.