Fluke 1750 Fluke 1750 Operators Manual - Page 59

Power Recorder Specifications for the System: Recorder and Power Analyze Software Voltage and Current Measurement Accuracy RMS Voltage Measurement Type True rms calculated continuously: every cycle, every 1/2 cycle, and every 10 or 12 cycles at 50 or 60 Hz respectively, as required by IEC 61000-4-30. Measurement Uncertainty AC: ± 0.2 % reading ± 0.1 % full scale above 50 V rms DC: ± 0.5 % reading ± 0.2 % full scale above 50 V dc If the ac component of a dc signal is below 40 V rms, the dc uncertainty specification may have an offset. RMS Current Measurement Type True rms calculated continuously: every cycle, every 1/2 cycle, and every 10 or 12 cycles at 50 or 60 Hz respectively, as required by standards Measurement Uncertainty 0.1 % full scale + 0.5 % reading + current sensor accuracy, valid for 5 % to 100 % of current sensor range Current Accuracy Ferromagnetic Clamps ± (0.1 % full scale + 0.2 % reading + current sensor accuracy), valid for 5 % to 100 % of current sensor range Flexible Current Probes ± (0.1 % full scale + 0.5 % reading + current sensor accuracy), valid for 5 % to 100 % of current sensor range Transient Voltage (Impulse) Measurement Type Waveshape sampling, not peak detect Full Scale 8000 V pk Sample Resolution 200 nS Measurement Uncertainty 5 % reading ± 20 V (test parameters: 1000 V dc, 1000 V rms, 100 kHz) Dip (Sag) and Swell Measurements Voltage Swell (rms swell) Measurement Type True rms (one cycle calculation by overlapping each half cycle) (voltage between lines is measured for 3P3W lines and phase voltage is measured for 3P4W lines) Displayed Data Amplitude and duration of swell Measurement Accuracy Same as rms voltage Voltage Dip (RMS sag) Measurement Type True rms (one cycle calculation by overlapping each half cycle) (voltage between lines is measured for 3P3W lines and phase voltage is measured for 3P4W lines) Displayed Data Amplitude and duration of dip or interruption Measurement Accuracy Same as rms voltage Voltage Dropout (Interruption) Measurement Type Same as Voltage Dip Power and PF Measurement Calculated per IEEE1459 for best performance when distortions exist Measurement Type True rms calculated continuously: every cycle, and every 10 or 12 cycles at 50 or 60 Hz respectively, as required by standards Measurement Accuracy 0.2 % reading ± 0.1 % full scale + current sensor accuracy Frequency Measurement Range 42.5 to 69 Hz Measurement Source Same as PLL synchronization source Measurement Accuracy 10 mHz (10 to 110 % of range, with sine wave) Reactive Power Accuracy 0.2% reading ± 0.1 % full scale + current sensor accuracy 51