Light Weight Portable Calibrator has 3 operational modes such as measure, source or simultaneous and ensures 4 to 8 hours of operation on a single charge. The Calibrator weighs 1.5 kg and takes a little less than 4000 cc of space. The Calibrator has the feature of direct display in Celsius or Fahrenheit of thermocouple and RTD inputs and has automatic and manual cold-junction compensation for thermocouples. The Calibrator is offered in a size of 220 X 80 X 220 mm and handles a wide range of process inputs, RTD, thermocouples, mV and mA linear input. The Light Weight Portable Calibrator has microprocessor-based closed-loop design and is portable.