This CA 1631 process signal calibrator from Chauvin Arnoux is compact and easy to use, and it has a large, perfectly readable digital display. 
 The CA 1631 is particularly used for the generation of DC loop currents between 0 and 24 mA with an accuracy of ± 0.015% and it can deliver a DC voltage between 0 and 20 V with an accuracy of ± 0.02%. 
 The device is battery operated and offers long mains-independent operation on site. With the power adapter, the device is ready for use without any time limit. 
 Supplied with 1 set of test leads and 1 set of alligator clips, 6 x 1.5 V batteries, type AAA, 1 instruction manual in 5 languages and 1 transport bag