Advanced modular calibration system includes 3 discrete components which can be used as standalone instruments. Rugged and weatherproof multifunction DPI 620 calibrator can measure and source mA, mV, V, Ohms, frequency, and variety of RTDs/thermocouples. Interchangeable pressure measurement modules attach to calibrator via carrier. Three pressure stations enable generation of pneumatic/hydraulic pressure from 95% vacuum to 20 or up to 100 bar and 0–1,000 bar, respectively.