In addition, the GE Druck DPI 610 / 615 pressure calibrator had a rugged weatherproof design, which is styled such that the pressure pump can be operated and test leads connected without compromising the visibility of the large dual parameter display. GE Druck DPI 610 / 615 pressure calibrators feature mA step and ramp outputs and built-in continuity testers which extend the capabilities to include the commissioning and maintenance of control loops.