A quick guide for how to Read a 4-20 mA Signal on a Multimeter. Discover the essential techniques with confidence.
- Electrical devices which provide a 4-20 mA (milliamp) signal are important tools for providing reliable communication between sensors and control devices over long distances.
- In some cases, the controller generates a 4-20 mA signal based on voltage readings from sensors.
- Use shielded wiring to connect to these terminals and downstream controllers or data loggers.
- For controllers with digital or analog readouts that are independent of the 4-20 mA loop, verify the calibration of the sensor.
- Begin the process to be measured and test its parameters, using an independent means of measurement.
- For chemical processes, use meters or chemical test kits that can confirm the range of conditions.
