Power Quality Analyzer Model 3945-B 17CHAPTER 3SPECIFICATIONS3.1 Reference ConditionsParameter Reference ConditionsAmbient temperature 73°F ± 5°F (23°C ± 3°C)Humidity 45%Atmospheric pressure 25.4" Hg to 31.3" Hg (860 to 1060 hPa)Phase voltage 230Vrms and 110Vrms ±2% without DCClamp current circuit input voltage 0.03V to 1Vrms without DC (<0.5%)AmpFlex® current circuit input voltage 11.8mV to 118mVrms without DC (<0.5%)Frequency of electricity network 50 and 60Hz ± 0.1HzV/I phase shift 0° active power / 90° reactive powerHarmonics <0.1%The uncertainties given for power and energy measurements are maximum for Cos ϕ = 1 or Sin ϕ = 1and are typical for the other phase shifts.NOTE: The symbol “U” will be used throughout this manual and in theinstrument to refer to phase-to-phase voltage measurement.The symbol “V” will be used for phase-to-neutral voltage measurement.*All specifications are subject to change without notice.3.2 Electrical SpecificationsSampling Frequency (256 samples per cycle):12.8kHz samples/sec per channel @ 50Hz15.36kHz samples/sec per channel @ 60HzMemory Size: 4MBMemory Partition: Data Logging - 2MB; Waveform capture - XXMB;Transient capture -XXB; Alarms - XXB3.2.1 Voltage InputsOperating Range: Phase-Phase - 960Vrms AC/DCPhase-Neutral - 480Vrms AC/DCInput Impedance: 340kΩ between phase and neutralOverload: 1.2Vn permanently; 2Vn for 1 sec (Vn = nominal voltage)
