Clarke Hess 2330
The Model 2330 Sampling Volt-Ampere-Watt Meter is a precision, high-accuracy, auto-ranging instrument that simultaneously measures and displays true rms Voltage, true rms Current, and true mean Power over a frequency range from dc to more than 600 kHz. Full-scale Current and Voltage inputs are typically measured within ±0.1% of the reading in amplitude to at least 400 kHz. Corresponding Power is typically measured within ±0.1% of the input Volt-Amperes to 200 kHz and within ±0.2% of the input Volt-Amperes to 400 kHz for loads of any Power Factor. SAMPLING V-A-W-METER
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Clarke Hess 2330