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20-7The model 20/7 is a precision, loop powered 2-wire transmitter with galvanic isolation between its input and the current-loop output signal. The 20/7 provides the necessary circuitry for amplification and processing of Frequency/Pulse signals from various sensors such as flowmeters, cams, encoders, tachogenerators and many other types of rotating machinery. The output is a 4-20mA output signal which is linearly proportional to the input frequency or pulse rate. An optional LCD indicator is available on the 20/7 to indicate the output in Engineering Units.The 20/7 can be easily ranged without requiring special tools or board modifications. The model 20/7L also provides signal linearization to correct for the inherent non-linearity of sensors such as turbine/paddle flowmeters. A TEST terminal provides a 40-200 mV signal proportional to the 4-20mA output. Applying a DVM to the TEST terminals allows monitoring and verification of the output without interrupting or disconnecting the current loop. 

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