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Troubleshooting Current Loops with Voltage Measurement

S Bharadwaj Reddy
Sometimes ammeter or current measurement with multimeter is unavailable at work locations , we can still perform useful troubleshooting measurements using nothing but a DC voltmeter / Multimeter with DC...

Troubleshooting a 4-20mA Current loop

S Bharadwaj Reddy
The basic layout of every 4-20mA loop consists of a power supply, a transmitter, and passive loop devices. The supply produces the energy to run the loop. The transmitter controls...

Why 4-20 mA Standard is so popular ?

S Bharadwaj Reddy
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 circuit, a failure or a fault mode like cut wires...

Basics of 4 to 20 mA analog Signals

S Bharadwaj Reddy
The  most  popular  form of signal transmission  used in modern  industrial  instrumentation  systems is the 4 to 20 milliamp DC standard. This is an analog signal standard, meaning that the...

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