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Wideband Power Analyzer
Model 2335A
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DC to 1MHz
Inputs up to 10A and 1000V
0.2% Uncertainty
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 Power Analyzer is a precision, high accuracy,
auto-ranging instrument 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 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 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 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 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 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.
TYPICAL DISPLAYS
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CURRENT,
VOLTAGE, AND POWER |
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OSCILLOSCOPE |
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PHASE,
PF, AND VOLT-AMPERES |
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HARMONICS |
SPECIFICATIONS
CURRENT AND VOLTAGE:
Range, Resolution and Input Impedance (Voltage
Channel)
Full
Scale Voltage |
Max. Peak
Value |
Resolution |
Input
Impedance |
2.000V |
6V |
1mV |
1.05
MOhms / 30pF |
20.00V |
60V |
10mV |
1.05
MOhms /30pF |
200.0V |
600V |
100mV |
1.00
MOhms / 30pF |
2000 V |
3000V |
1 V |
1.00
MOhms / 30pF |
The 2000V range is useable to 1000V rms .
Range, Resolution and Input Impedance (Current
Channel)
Full Scale Voltage |
Max. Peak Value |
Resolution |
Input Impedance |
5.000mA |
15mA |
1uA |
2.0 Ohms |
50.00mA |
150mA |
10uA |
2.0 Ohms |
500.0mA |
1500mA |
100uA |
0.034 Ohms |
5000 mA |
15A |
1mA |
0.034 Ohms |
EXTERNAL (100mV) |
300mV |
- |
100 kOhms |
Uncertainty (rms) Current and Voltage (Double the specification for peak readings)
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5% - 100% of Full
Scale |
100% - 200% of Full
Scale |
Frequency |
±(% of Reading+% of
Range) |
% of Reading |
dc |
±(0.10 + 0.30) |
±0.40 |
5Hz - 250kHz |
±(0.10 + 0.10) |
±0.20 |
250kHz - 500kHz |
±(0.20 + 0.20) |
±0.40 |
*500kHz - 1.0MHz |
±(0.40 + 0.40) |
±0.80 |
Isolation: A
±500Vpeak may be placed between the LO Voltage Terminal and Chassis.
POWER AND POWER x 10:
Ranges Eight decade Full Scale ranges from 1.0000mW to 10,000W. The
ranges are all combinations of a Full Scale Current range multiplied by a Full Scale
Voltage range plus a corresponding set of combinations with ten times the sensitivity
which occur when the Px10 range is activated. Any Px10 range may be selected when both the
Peak Current and the Peak Voltage are less than 0.316 of their Peak Range values.
Any PX10 range may be selected when both the Peak Current and the Peak Voltage are less
than 0.316 of their Peak Range values.
Resolution 1 part in 10000 of the Full Scale range
Uncertainty Power and Px10
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5% - 100% of Full
Scale V-A |
100% - 200% of Full
Scale V-A |
Frequency |
±(% of V-A+% of
Range) |
% of V-A |
dc |
±(0.20 + 0.30) |
±0.50 |
5Hz - 250kHz |
±(0.20 + 0.10) |
±0.30 |
250kHz - 500kHz |
±(0.40 + 0.20) |
±0.60 |
*500kHz - 1.0MHz |
±(0.80 + 0.40) |
±1.20 |
(for any Power Factor) (V-A is the Volt-Ampere product) *Specify option -01
VOLT-AMPERES:
Volt-Amperes are calculated as the product of the rms Current and the rms Voltage. They
have the same Full Scale ranges, resolution and uncertainty as POWER.
POWER FACTOR:
Power Factor is calculated as the ratio of Power to Volt-Amperes. It has a range from 0 to
±1.0000 and a resolution of .0001 for Volt-Ampere products greater than 7.5% of Full
Scale. The resolution decreases as the Volt-Ampere product decreases. The uncertainty is
±0.002 ±10 digits up to 250kHz, ±0.004 ±20 digits from 250kHz to500kHz, and ±0.008
±40 digits from 500kHz to 1000kHz (with option -01.
PHASE ANGLE:
The resolution of the phase angle between the fundamental current and the fundamental
voltage is 0.01°. The uncertainty is ±0.17° up to 250kHz, ±0.34°from 250kHz to
500kHz, and ±2.04° from 500kHz to 1MHz.
HARMONICS:
The Harmonic amplitude uncertainty is the same as that of the current or the voltage at
the frequency of the harmonic, and the resolution is the same as that of the fundamental
(the first harmonic).. The uncertainty of the harmonic phase angle is three times as graat
as the uncertainty of the phase angle between the current and the voltage
THD:
The Total Harmonic Distortion uncertainty is ± 1dB.
FREQUENCY:
The Frequency of the Voltage or the Current from 5.00Hz to 3275kHz with four digits of
resolution and an uncertainty of ±100ppm ±1 digit.
DISPLAY:
High resolution graphical TFT
DIGITAL INTERFACE:
USB, IEEE-488.2
DISPLAY UPDATE:
80ms
SETTLING TIME:
Fast (160ms), Medium (2s), Slow (4s).
TEMPERATURE RANGE:
Operating: 0° C to 40° C
Within Specifications: 23șC ± 5șC
Storage: -40° C to 75° C
RELATIVE HUMIDITY:
Less than 90%
WARM-UP TIME:
Thirty minutes for all specifications
POWER REQUIREMENTS:
100 to 260V rms, 47 to 63Hz, 30VA max.
PHYSICAL:
19" Rack Mountable, 3-1/2" high (2U)
Weight: 5kgm (11pounds)
Size: 48.3cm x 8.90cm x 33.0cm (19" x 3.5" x 13") |
