Simultaneous mA and % readout for quick, easy interpretation of readings mA accuracy of 0.025%, superior to other loop calibrators in this price range 1 µA resolution for mA source, simulate and measure 0-100% “span check” for fast confirmation of zero and span Selectable slow ramp, fast ramp, and step ramp to provide smooth outputs for valve slewing and loop functional tests 24 volt internal loop supply HART TM mode connects 250 O resistor in series with 24 V loop for compatibility with HART Communicators.