Built-in high performance electronic pump and precision pressure controller Portable automated pressure calibrator provides a turn-key solution for calibration of gauges, transmitters, and switches both in the field and in the laboratory Automatically generate from 90% vacuum to max pressure with 0.005%FS pressure control stability and 0.05%FS accuracy To improve the calibrator accuracy, two pressure modules with differing ranges are used. These are built-in and integrated with the internal pump and controller. In addition to the pressure generation, control, and measurement capabilities, the ADT761 also features HART communication capability, supplies 24V loop power, and reads the current or voltage produced by the pressure transducers.