INTRODUCTION GF112B Single-Phase kWh Meter Calibrator is suitable to test various types single phase meters on site and also can be used to test alternating current parameters. TECHINICAL SPECIFICATION Electrical parameter Accuracy class 0.2% Active power measurement accuracy 0.2%, 0.5% Energy measurement accuracy 0.2%, 0.5% Power supply AAA type, Li rechargeable battery, 750mAh, 3.6V it can work 8 hours continuously Warming-up time