Unlike existing multi-function calibrators, the LS3300 provides a lower cost and easy-to-use solution with specific features for calibrating power meters.
The LR3300 combines a wide output (up to 1250 V and 62.5 A) with high accuracy (450 ppm or 0.045%) and high stability (100 ppm or 0.01% for one hour). For larger current outputs, up to 180 A can be obtained by synchronising the outputs of multiple units.
For the calibration of 3-phase power meters, it is possible to synchronise the outputs of two or three LS3300 instruments using master/slave connections. Other features include the capability for direct calibration of the current sensor inputs of a clamp-on power meter using the instrument’s auxiliary output, and notification of when the output becomes stable to maximise the accuracy of the measurement.
The LS3300 is based on the core technology of Yokogawa’s AC calibrator, the 2558A, originally released in 2013. Calibrating power meters with the 2558A, however, required two separate 2558A instruments plus a reference power meter, whereas the LS3300 combines these functions in a single instrument to address the calibration needs of lower-accuracy power meter users.
All power meters and analysers need calibrating to confirm their performance and to satisfy the requirements of quality systems such as ISO9001. As a dedicated instrument for calibrating lower-accuracy power meters at commercial mains frequencies and up to 1.2 kHz, the LS3300 offers a cost-effective solution for users who need to calibrate higher volumes of power meters.
