Agilent Turbo-V 1001 rack controllers are microprocessor-controlled frequency converters with self-diagnostics and protection features that ensure the highest degree of reliability. The compact, ½ rack unit has a multifunction alphanumeric display for pump status and error code analysis. The front panel has a two-line dot matrix LCD display with back lighting, which displays rotational speed, current, power, and bearing temperature. The microprocessor also acts as a pump cycle log, and can display the number of vacuum cycles, the cycle time for the current cycle, and the total operating hours on the pump. Remote operation can be accomplished with logic level contact closures and with optional computer interfaces.