How To Source 4 20Ma Using The Fluke 789 Process meter
What do you get when you take the Fluke 787, the original combination multimeter and extend the range? You get the Fluke 789, ultimate loop calibration multimeter with very large dual display. The 789 goes one step further in battling low light conditions by adding two brightness settings to the enhanced backlight. This precision 1000 V, 440 mA and True-RMS digital multimeter does it all and includes diode test and continuity beeper. The externally accessible AA alkaline batteries last a typical 140 hours in measurement mode and are easy to change in the field. So let this powerful two in one multimeter be the only tool you need.
http://www.tequipment.net/Fluke789.html