Metrology Glossary: Loop Calibrator
What Is A Loop Calibrator?
A loop calibrator is a portable instrument used for calibrating and diagnosing 4-20 mA current loops. These loops find frequent application in industrial process control systems for transmitting signals from sensors and transmitters to controllers and other equipment. Loop calibrators are capable of gauging the current within the loop, providing a predefined current to the loop, and replicating the signal generated by a sensor or transmitter. These capabilities enable technicians to confirm the proper functioning of devices within the loop and make necessary adjustments without interrupting the ongoing process.
What Are Loop Calibrators Used For?
The loop calibrator is an indispensable tool that has multiple applications within process control systems. In terms of calibration, it verifies the accuracy of current readings from sensors and transmitters in the loop, while also fine-tuning the operation of current-powered devices to optimize their performance. In diagnostics, the calibrator troubleshoots malfunctioning devices by isolating and testing individual components, identifying issues such as faulty connections, wiring discrepancies, or equipment calibration problems. Its proactive diagnostic capabilities help prevent disruptions in process operations by addressing potential problems before they impact efficiency. Loop calibrators are also used for maintenance by conducting preventative checks on loop components, ensuring optimal functionality, and calibrating devices during routine procedures. Comprehensive documentation of calibration results adds an essential layer for future reference and regulatory compliance, making the loop calibrator an essential tool for maintaining consistency and reliability in complex process control systems.
Related Terms
Loop resistance comprises the combined resistance of both the thermocouple wires and any connectors or terminals within the circuit....
Calibration involves the comparison of a measuring instrument with a known accurate standard to identify any discrepancies and make necessary adjustments....
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Further Reading
As the trend toward electrification of mobile equipment accelerates, it is becoming increasingly apparent that simply looking at the power rating of the current Internal Combustion Engine (ICE) and using that to assume battery power requirements is not enough.
September 27, 2022
