l-l. INTRODUCTION. The Model 227 is a dc current source with full range current from 1 milliampere to 1000 milliamperes. The Model 227 provides a compliance up to 300 volts on lmA, lOmA, and lOOmA ranges or up to 50 volts on 1OOOmAra nge. The output is bipolar. Load regulation is ?0.005% of range from no load to full load. l-2. FEATURES. a. Three digit readout has least significant digit continuously adjustable using Fine Current Control. Typical setability is 1 degree of rotation (which corresponds to 0.005% of full range). b. Compliance limit is adjustable up to 300 valcs. e. Outpur can be floated to i500 volts above case. d. Voltage programming input is standard. e. Model 2271 Programming option is available factory installed.