Wideband Power Analyzer - Clarke Hess 2335A
- DC to 1MHz
- Inputs up to 10A and 1000V
- 0.2% Accuracy
- Isolated inputs
- Low Power Factor accuracy
- Harmonic analysis
- Total Harmonic Distortion
- Low current ranges
- USB and IEEE interface
- Graphical display
TRUE RMS/WIDE BANDWIDTH
The Model 2335A Wideband Power Analyzer is a precision, high accuracy, high frequency auto-ranging power analyzer which measures and displays true rms Voltage, true rms Current, and true mean Power over a frequency range from dc to more than 1MHz. Full scale Current and Voltage inputs are typically measured within ±0.1% of the amplitude reading to at least 500kHz. The corresponding Power is typically measured to within ±0.1% of the input Volt-Amperes to 250kHz and to within ±0.2% of the input Volt-Amperes to 500kHz for loads having any Power Factor.
MULTI-FUNCTION
In addition to the primary functions, the Model 2335A Power Analyzer measures the input Frequency, the phase angle between the current and voltage inputs, and the harmonic amplitudes and phases relative to the fundamental phase, up to 50, for both the current and voltage inputs. It also calculates the Power Factor, the Volt-Amperes, and the Energy (if it has been selected). These functions may be displayed or read over the IEEE-488 or USB interface.
LOW POWER FACTOR ACCURACY
Five digits or resolution combined with excellent phase matching between the current and voltage channels make the Model 2335A Power Analyzer an exceptionally good instrument for making low power factor measurements up to 1MHz. This ability makes the instrument ideal for high frequency core loss measurements which have inherently low power factors.
UNPARALLED HIGH FREQUENCY ACCURACY
The Model 2335A Power Analyzer allows broadband and high accuracy measurements of both sinusoidal and highly distorted wave shapes. The Current, Voltage, Power, and Power Factor uncertainties to 1MHz are far better than any other Watt Meter or Power Analyzer, or for that matter, with respect to Current or Voltage, almost all conventional multimeters.
WIDE MEASUREMENT RANGE
The Model 2335A Power Analyzer has full scale Power ranges from 1.0000mW to 10000W. With external shunts or current to voltage transducers, the upper range may be extended by a factor of ten or one hundred. Full scale Voltage from 2.000V to 2000V (usable to 1000V) and full scale Current ranges from 5.000mA to 5.000A (all rms values) cover a wide range of load impedances. Full scale Current and Voltage inputs may have crest factors up to three while smaller inputs may have even higher crest factors. Sinusoidal inputs with rms values of twice the nominal Full Scale value may be measured with no loss in accuracy.
POSSIBLE MEASUREMENT USES
Measurement of Ultrasonic Equipment of all types and power levels, Ferrite Core Loss, Transformer Core Material, Switching Power Supplies, Fluorescent Lamp Ballasts of all types, Mercury Arc Lamp Circuits, Sodium Lamp Ballasts, Speed Controlled Motors of all types, Efficiency of any device with an electrical input and an electrical output, SCR Controlled Devices of all types, High Frequency and/or Distorted Currents from any source, Voltage Response of any device from DC to 1MHz, and the Characteristics of Electric Automobile Drives.
UNIQUE SAMPLING APPROACH
The Voltage and Current inputs of the Model 2335A Power Analyzer are simultaneously sampled (with 16 bit resolution), converted to digital form, and transmitted via isolated links to the control board on the main chassis. This allows both the Current and Voltage inputs to be completely isolated from each other and from the main chassis ground. The asynchronous sampling frequency is controlled by the system microprocessor in such a fashion that neither it nor any of its harmonics can come close to the measured input frequency or any of its harmonics. This precaution permits sampling at frequencies that are significantly below the Nyquist rate.
REMOTE CONTROL
The Model 2335A is equipped with an IEEE-488.2 interface and a USB interface which both incorporate all of the IEEE-488.2 Common Commands and Queries as well as the commands and queries required for device operation. Any function that can be entered via the front panel can be controlled via either interface. A menu item selects either the IEEE-488 or the USB interface to be active.
