While it is certainly possible to program a computer or PLC to perform a running time integral of the rate-of-flow signal, this technique is difficult, time-consuming, and fraught with pitfalls. A straightforward and elegant hardware-based solution is to convert the 4-20mA signal to a pulse, and utilize the EtherMeter’s sophisticated pulse-processing capabilities to provide both totalization and rate-of-flow.
Interested in learning more about this technique? Check out our new Application Note in the Documentation Library: App Note #20
For reference, here is a link to the Brochure for the EtherMeter, which can process pulse signals into total consumption and rate data available in Modbus and/or Allen Bradley automation protocols.
Also for reference, here is a link to the Brochure for the Milliamp-to-Pulse converter: the Model APD 7500 SS