The BDCT247 is for monitoring of DC and true rms ac currents from 5 to 6000A and provides a standard process signal output. Internal coding plugs are used to use to program the output measurement range from 10 to 100% of the CT used. Current is detected by means of a toroidal Hall Effect sensor, providing total isolation and true waveform transfer. This is particularly useful for low voltage systems, where the traditional DC-Shunt method is not acceptable. To accommodate pulsing current or high harmonic contents the filter constant can be set by coding plugs. For external external CT versions the zero and span are accessible from the top. For top mounted CT versions the adjustments are accessible on the lower narrow edge Span is closest to bottom, Zero is closest to the terminals.