This multifunction process calibrator is designed to meet the highest industry standards with its rugged and durable construction ensuring reliable performance in even the most demanding environments. The r5850 features a high-resolution lcd display automatic step and ramp functions a built-in 24v loop power supply the ability to store and recall frequently used calibration setups and offers an easy-to-use push-button interface. This loop calibrator sources and measures ma. The r5820 features a 24v loop power supply selectable step or ramp outputs and an easy-to-read 5-digit lcd display. This portable and easy-to-use calibrator provides accurate measurements and calibrations for a wide range of process signals including voltage current resistance frequency and temperature. Features ul style""margin-top0px; padding-top 5px; padding-bottom 5px;"" ma sourcing and measurement 0-28 vdc measurement to check loop voltage basic measurement/sourcing accuracy of 0.02% and 0.05% respectively simulate ma and % with 0.001% display span selectable step or ramp outputs internal 24v loop power supply low battery indicator and auto shut off (after 15 mins/off) (battery life approx. 20 hours) storage temperature 14 to 122°f (-10 to 50°c) operating temperature 32 to 122°f (0 to 50°c) operating humidity range 0 to 85% what's included with the reed r5820 loop calibrator test leads alligator clips protective holster 2 aa batteries ideal applications for the reed r5820 testing loop powered isolators and two-wire transmitters verifying and calibrating processes involving ma instrumentation dc voltage measurement range 28voutput range -0.200 to 28.000v resolution 1mv accuracy ±0.02% reading ± 2mv dc current measurement range 20maoutput range -1.000 to 22.000maresolution 0.001ma accuracy ±0.02% reading + 4µa loop current measurement range 20ma output range 0.000 to 22.000ma resolution 0