Evaluasi Kinerja Alat Ukur Tinggi Muka Air Otomatik Menggunakan Kalibrator Di Laboratorium

Water Resources Infrastructure Development requires careful planning, one of which requires hydrological analysis. The accuracy of hydrological data is influenced by the method, operator/observer, and the performance of the measuring instrument. Until now, Water Resources Management Agencies in Indonesia conducted observations of discharges in rivers or channels indirectly, by observing WL (Water Level) in the WL Gauging Station. WL values can be read directly and manually or using an Automatic WL Meter Tool (AUTO) which has been found in many types. Whatever the type, it is necessary to evaluate its performance, one of which is through calibration trials in the laboratory. This paper presents an evaluation of several types of AUTO (AWLR, AWLL Buoyance, and AWLL Pressure) using a Calibrator in the Laboratory. With calibration can be compared the results of WL readings from AUTO with the Standard/Reference Tool using the Calibrator as the main facility, so that the value of the Measurement Error and Measurement Uncertainty is obtained. Both parameters are used to determine the performance of a device because it is related to the level of accuracy and precision. Based on the results of the test, it was found that both the best level of accuracy and precision in sequence are AWLR, AWLL Pressure, and AWLL Buoyance.