Cie 542: Better

Disconnect transmitter and substitute a variable resistor or mA source. Sweep 4-20 mA and monitor the display/PLC value. If mismatch persists, the receiver is faulty. Future of Analog Standards: Will CIE 542 Be Replaced? The IEC has officially replaced many analog standards with IEC 61158 (fieldbus) and IEC 62769 (FDI integration). However, no international body has deprecated 4-20 mA . In fact, new products are still designed to CIE 542 specifications.

CIE 542 assumes a single point ground. Multiple grounds cause mysterious shifting. Measure AC voltage between signal negative and earth ground – should be <100 mV AC. cie 542

Output (mA) = 4 mA + (Input % × 0.16 mA) Disconnect transmitter and substitute a variable resistor or