Troubleshooting with Loop Calibrator
Special-purpose electronic test instruments called loop calibrators exist for the express purpose of 4-20 mA current loop circuit troubleshooting. These
Control Systems
We have the largest collection of Industrial Control Systems articles like industrial automation, Distributed Control Systems (DCS).
Troubleshooting Current Loops with Voltage Measurement
Sometimes ammeter or current measurement with multimeter is unavailable at work locations , we can still perform useful troubleshooting measurements
4-wire Passive versus Active Transmitters
4-wire “passive” versus “active” output transmitters Some self-powered (4-wire) analog electronic transmitters are designed to behave as electrical loads rather
2-wire Transmitters Current Loops
2-wire (“loop-powered”) transmitter current loops It is possible to convey electrical power and communicate analog information over the same two
4-wire Transmitters Current Loops
4-wire (“self-powered”) Transmitter current loops DC electric current signals may also be used to communicate process measurement information from transmitters
DCS Controllers to Output Current Loops
The simplest form of 4-20 mA current loop is the type used to represent the output of a process controller,
Alarm and Trip Systems
Alarm and Trip Systems The purpose of an alarm system is to bring a malfunction to the attention of operators
4-20mA Junction Box versus Fieldbus (FF) Junction Box
How will a field JB of conventional 4-20mA connection look different from that of FF JB. Conventional Junction box Convectional
Using of MCT instead of Cable Glands on the Cabinets
Using of MCT instead of Cable Glands on field installed cabinets In local cabinet installed on plant, on skid packages,
What is a Control Loop ?
A control loop is a process management system designed to maintain a process variable at a desired set point. Each