Gossen-Metrawatt-METRAHIT-CAL-Calibrator-Gossen-Metrawatt-M244A-The-Gossen-Metrawatt-calibrator-METRAHIT-CAL-serves-as-an-exact-calibration-&-simulating-device-for-electrical-systems-With-a-range-of-calibration-functions-this-flexible-instrument-can-be-used-in-applications-such-as-process-engineering-control-room-&-equipment-fabrication-general-measuring-technology-&-many-others-As-a-system-component-it-can-always-be-used-in-calibration-systems-for-calibrating-measuring-transducers