I want to buy a small hand held unit with a 0-5VAC variable current output to use for input signal for RTU for testing and calibration purpose. If you have any advice to supplier or if it is easy let me know how to build one.
Could some body explain to me that why there is no a 0-5VAC variable out put calibrator. I am wondering if the RTU is designed to take 0-5VAC input signal from the secondary CT line signal, how someone could test and calibrate from test bench before installing the RTU in the field.