Calibrators and accessories test or enable testing of process transmitters, electrical equipment, or test valves to verify they operate or measure within acceptable parameters. Process calibrator multimeters test voltage, current, resistance, and frequency. Process calibrator accessories augment, support, or connect process calibrators. Handheld multifunction calibrators and calibration software verify proper function of industrial manufacturing systems. Portable and handheld pressure calibrators are ideal for field work verifying whether equipment like transducers and gauges measure pressure accurately. Pressure modules connect calibrators to equipment, allowing compatible calibrators to measure pressure. Handheld loop, current, and process calibrators can be transported for industrial manufacturing applications like field calibration of process transmitters, electrical equipment, or test valves.