Fire and gas detectors often use a 3-wire system rather than a 2-wire system for better functionality and safety.
Sometimes ammeter or current measurement with multimeter is unavailable at work locations , we can still perform useful troubleshooting measurements…
4-20 mA Standard 4-20mA has an inherent ‘live zero’. Zero engineering units is 4.0mA, not 0.0mA. 0.0mA indicates an open…
The most popular form of signal transmission used in modern industrial instrumentation systems is the 4 to 20 mA current…
