功率分析儀

TRUE RMS/WIDE BANDWIDTH
The Model 2335A Wideband Power Analyzer is a precision, high accuracy, high frequency 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 ?.1% of the amplitude reading to at least 500kHz. The corresponding Power is typically measured to within ?.1% of the input Volt-Amperes to 250kHz and to within ?.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.

POSSIBLE MEASUREMENT USES

 

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 compley 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

CURRENT, VOLTAGE, AND POWER		OSCILLOSCOPE
PHASE, PF, AND VOLT-AMPERES		HARMONICS

SPECIFICATIONS

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

Accuracy （rms） Current and Voltage （Double the specification for peak readings）

	5% - * of Full Scale	* - 200% of Full Scale
Frequency	?% of Reading+% of Range）	% of Reading
dc	?0.10 + 0.30）	?.40
5Hz - 250kHz	?0.10 + 0.10）	?.20
250kHz - 500kHz	?0.20 + 0.20）	?.40
*500kHz - 1.0MHz	?0.40 + 0.40）	?.80

 

POWER AND POWER x 10:

Ranges

 

（for any Power Factor） （V-A is the Volt-Ampere product）

VOLT-AMPERES:

POWER FACTOR:

PHASE ANGLE:

HARMONICS:

THD:

FREQUENCY:

DISPLAY:

DIGITAL INTERFACE:

DISPLAY UPDATE:

SETTLING TIME:

TEMPERATURE RANGE:

RELATIVE HUMIDITY

WARM-UP TIME:

POWER REQUIREMENTS:

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"）
100 to 260V rms, 47 to 63Hz, 30VA max.
Thirty minutes for all specifications
Operating: 0?/font> C to 40?/font> C
Within Specifications: 23篊 ?5篊
Storage: -40?/font> C to 75?/font> C:
Less than 90%
Fast （160ms）, Medium （2s）, Slow （4s）.
80ms
USB, IEEE-488.2
High resolution graphical TFT
The Frequency of the Voltage or the Current from 5.00Hz to 3275kHz with four digits of resolution and an accuracy of ?00ppm ? digit.
The Total Harmonic Distortion accuracy is ?1dB.
The Harmonic amplitude accuracy 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 accuracy of the harmonic phase angle is three times as graat as the accuracy of the phase angle between the current and the voltage
The resolution of the phase angle between the fundamental current and the fundamental voltage is 0.01? The accuracy is ?.17?up to 250kHz, ?.34癴rom 250kHz to 500kHz, and ?.04?from 500kHz to 1MHz.
Power Factor is calculated as the ratio of Power to Volt-Amperes. It has a range from 0 to ?.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 accuracy is ?.002 ?0 digits up to 250kHz, ?.004 ?0 digits from 250kHz to500kHz, and ?.008 ?0 digits from 500kHz to 1000kHz （with option -01. 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 rangeIsolation: A ?00Vpeak may be placed between the LO Voltage Terminal and Chassis.

Accuracy Power and Px10

	5% - * of Full Scale V-A	* - 200% of Full Scale V-A
Frequency	?% of V-A+% of Range）	% of V-A
dc	?0.20 + 0.30）	?.50
5Hz - 250kHz	?0.20 + 0.10）	?.30
250kHz - 500kHz	?0.40 + 0.20）	?.60
*500kHz - 1.0MHz	?0.80 + 0.40）	?.20

*Specify option -01
Volt-Amperes are calculated as the product of the rms Current and the rms Voltage. They have the same Full Scale ranges, resolution and accuracy as POWER.

 

CURRENT AND VOLTAGE: