Special-purpose electronic test instruments called loop calibrators exist for the express purpose of 4-20 mA current loop circuit troubleshooting . These versatile instruments are generally capable of not only measuring current , but also sourcing current to unpowered devices in a loop , and also simulating loop – powered 4-20 mA transmitters.
Download here complete handbook on Loop calibrators to understand functionality of Loop Callibrators and their applications
The figure below in quiz displays a modern loop calibrator manufactured by Fluke is the model 705. The Fluke 705 is a cost-effective, integrated solution for calibration, repair and maintenance of milliamp loops. It features a large display and simple, push button interface for ease of use.
Image used for education purpose from Fluke’s official website.
Also download Ebooks on:
- Different Countries and their Electricity by Low/Medium Voltage and Frequency
- Direct digital control
- Electrical Engineering Abbreviations Handbook
- Programmable Logic Controllers
- Wireless Instrumentation Handbook PDF Download
- Digital Data Acquisition and Networks
- Pneumatic Instrumentation Handbook
- Continuous Pressure Measurement
- Electrical Circuit Schematics Handbook
- Circuits Troubleshooting theory and Practice Handbook
- Electrical signal and control wiring