xx ZZZ PA3000 Power Analyzer User Manual *P077115200* 077-1152-00
xx ZZZ PA3000 Power Analyzer User Manual www.tek.
Copyright © Tektronix. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or suppliers, and are protected by national copyright laws and international treaty provisions. Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all previously published material. Specifications and price change privileges reserved. TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Warranty Tektronix warrants that this product will be free from defects in materials and workmanship for a period of three (3) years from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product.
Table of Contents Important safety information .................................................................................... vii General safety summary .................................................................................... vii Service safety summary ....................................................................................... x Terms in this manual ......................................................................................... xi Symbols and terms on the product ....
Table of Contents To connect an external resistive shunt ...................................................................... 31 To connect a transducer with a voltage output............................................................. 33 To connect a voltage transformer / transducer ............................................................. 34 Power for external transducers .............................................................................. 35 The menu system ..............................
Table of Contents Firmware update utility .................................................................................... Application examples ........................................................................................... Example 1: Efficiency testing single phase applications ............................................... Example 2: Efficiency testing three phase applications ................................................ Example 3: Energy consumption testing..........................
Table of Contents List of Figures Figure i: Tektronix PA3000 Power Analyzer................................................................. xvii Figure 1: Typical PA3000 input connections .................................................................... 4 Figure 2: Rear panel input module ............................................................................... 5 Figure 3: Result screen (four-channel instrument)..............................................................
Table of Contents Figure 38: Figure 39: Figure 40: Figure 41: Figure 42: Figure 43: Figure 44: Figure 45: Figure 46: Figure 47: Figure 48: Figure 49: Figure 50: Figure 51: Figure 52: Figure 53: Figure 54: Figure 55: Figure 56: Figure 57: Figure 58: Figure 59: Figure 60: Figure 61: AC-DC efficiency measurement wiring diagram ............................................... Efficiency measurement on the PA3000 ......................................................... Harmonic bar chart on the PA3000 ........
Table of Contents List of Tables Table 1: Front panel controls and connectors .................................................................. Table 2: Signal inputs on rear panel ............................................................................. Table 3: Weighing factors for TIF ............................................................................... Table 4: Effects of frequency range settings in PWM mode.................................................. Table 5: Input ranges ........
Important safety information This manual contains information and warnings that must be followed by the user for safe operation and to keep the product in a safe condition. To safely perform service on this product, additional information is provided at the end of this section. (See page x, Service safety summary.) General safety summary Use the product only as specified. Review the following safety precautions to avoid injury and prevent damage to this product or any products connected to it.
Important safety information connected to earth ground. Before making connections to the input or output terminals of the product, make sure that the product is properly grounded. Do not disable the power cord grounding connection. Power disconnect. The power cord disconnects the product from the power source. See instructions for the location.
Important safety information Use only specified replacement parts. Replace batteries properly. Replace batteries only with the specified type and rating. Recharge batteries properly. Recharge batteries for the recommended charge cycle only. Use proper fuse. Use only the fuse type and rating specified for this product. Wear eye protection. Wear eye protection if exposure to high-intensity rays or laser radiation exists. Do not operate in wet/damp conditions.
Important safety information Use only correct Measurement Category (CAT), voltage, temperature, altitude, and amperage rated probes, test leads, and adapters for any measurement. WARNING. To prevent electrical shock, do not exceed the maximum measurement or maximum floating voltage for the test lead. Connect and disconnect properly. Connect the test leads to the measurement product before connecting it to the circuit under test.
Important safety information Verify safety after repair. Always recheck ground continuity and mains dielectric strength after performing a repair. Terms in this manual These terms may appear in this manual: WARNING. Warning statements identify conditions or practices that could result in injury or loss of life. CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.
Compliance information Compliance information This section lists the EMC (electromagnetic compliance), safety, and environmental standards with which the instrument complies. EMC compliance EC Declaration of Conformity – EMC Meets intent of Directive for Electromagnetic Compatibility. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities: EN 61326-1, EN 61326-2-1.
Compliance information Australia / New Zealand Declaration of Conformity – EMC Complies with the EMC provision of the Radiocommunications Act per the following standard, in accordance with ACMA: CISPR 11. Radiated and Conducted Emissions, Group 1, Class A, in accordance with EN 61326-1. Safety compliance This section lists the safety standards with which the product complies and other safety compliance information.
Compliance information where neither temperature nor humidity is controlled. The area is protected from direct sunshine, rain, or direct wind. Pollution degree 4. Pollution that generates persistent conductivity through conductive dust, rain, or snow. Typical outdoor locations. Pollution degree rating IP rating Measurement and overvoltage category descriptions Pollution degree 2 (as defined in IEC 61010-1). Rated for indoor, dry location use only. IP20 (as defined in IEC 60529).
Compliance information Environmental considerations This section provides information about the environmental impact of the product. Product end-of-life handling Observe the following guidelines when recycling an instrument or component: Equipment recycling. Production of this equipment required the extraction and use of natural resources. The equipment may contain substances that could be harmful to the environment or human health if improperly handled at the product’s end of life.
Compliance information xvi PA3000 Power Analyzer User Manual
Preface Preface Features and abilities The Tektronix PA3000 is a powerful and versatile precision power analyzer. Designed to provide clear and accurate measurements of electrical power and energy on all electrical products, the PA3000 is both an easy to use bench instrument and a fast and programmable automatic test interface.
Preface xviii PA3000 Power Analyzer User Manual
Getting started Before you begin - safety Carefully read and adhere to the following warning statements before you connect the power analyzer. WARNING. To avoid possible electric shock or personal injury please be aware of the following items: By connecting the power analyzer to active circuits, the terminals and certain parts inside the power analyzer are live. If possible, open the circuit before establishing a connection to the power analyzer.
Getting started Before each use Ensure that the power and connecting cables as well as all accessories and connected devices used in conjunction with this product are in proper working order and clean. Ensure that any third-party accessories used in conjunction with the device conform to the applicable IEC 61010-031 / IEC 61010-2-032 standards and are suitable for the respective measuring voltage range. Connection sequence WARNING.
Getting started The instrument will start the power on sequence; this takes approximately 15 seconds. During power on you will see the serial number and firmware version of the instrument. 4. The instrument is now ready for use. Concept of global, group, and channel parameters Definition of a group With a multiphase power analyzer there is often a requirement to link together measurement channels. This is known as grouping.
Getting started Frequency source (See page 51, Frequency Source.) Bandwidth (See page 52, Bandwidth.) Channel settings Channel setting are completely independent of any grouping. The following settings are on a per-channel basis: Scaling factor (See page 52, Scaling.) When setting a parameter that is a per-group or per-channel parameter, the group or channel will be displayed at the top of the menu. To change the group or channel, use the left and right arrow hard keys.
Getting started Figure 2: Rear panel input module Connect the AC supply live to the VHI terminal. Connect the AC supply neutral to the VLO terminal. Connect the load neutral to either the 30 A AHI or 1 A A1A terminal. Connect the supply neutral to the ALO terminal. For plug-connected single phase products, the simplest and safest way to make a connection to the product under test is to use a Tektronix Break Out Box.
Getting started Results screen The Results screen displays after the instrument completes the power-on sequence. The following figure shows the Results screen. Figure 3: Result screen (four-channel instrument) Depending on the number of channels in your instrument, the Results screen shows up to four columns of results (one per channel). The display can be broken down into columns and rows. Each column is one of four colors representing the results for that group.
Getting started Navigating the Results screen On the right side of most screens is a column of soft keys. Use these keys to navigate through the displayed screen or to access other screens or menus. The soft keys are displayed on the menus, but are controlled by the front panel keys to the right of the display. Page up Scroll up one measurement row Scroll down one measurement row Page down To view the results in a larger size, press (ZOOM key on the left front panel).
Getting started Navigating the menu system The menu system provides complete access to all settings of the PA3000. To access the menu system, press the (MENUS key). To return to the measurement display at any time, simply press press again or (RESULT key). With the menu system active, the five soft keys to the right of the display can be used to navigate and select options. A list of the menu keys can be found in the soft key section of the manual. (See page 23, Soft keys.
Getting started On-screen help Throughout the menu system, on-screen help is available to provide summarized help on the subject at hand. For example, press and then press the (HELP) key; help on the Main Menu will be displayed. Press remove the help and return back to the previous screen. again to to get As you select menu options and need help on a particular screen, press a brief summary of help on that subject.
Getting started 10 PA3000 Power Analyzer User Manual
Front panel Front panel controls and connectors Figure 5: Front panel controls and connectors Table 1: Front panel controls and connectors 1 Quick view keys 2 Left and right arrow hard keys 3 USB connection for flash drives 4 640 x 480 TFT display 5 Soft keys 6 Menu and Help keys 7 Number and formula keys 8 Front mounted on / off switch 9 Operational and alphabet keys PA3000 Power Analyzer User Manual 11
Front panel Quick view keys The Quick view keys provide easy access to different display screens. Figure 6: Quick view keys The first seven keys change the display screen to show different information: (RESULT key) displays the normal Results screen. (WAVE key) displays waveforms. (BAR key) displays a harmonics bar chart. (INTEG key) displays integrator waveforms when in Integrator mode. (VECTOR key) displays a vector diagram. (MATH key) displays the math results as configured from the math menu.
Front panel The left and right arrow hard keys move the results left and right to see more results (there can be up to 15 columns of results). The left and the right arrow hard keys are also used in other screens such as the menu screen for changing groups or the waveform screen for moving the cursors. Results screen The Results screen is the default, power on screen for the instrument. Figure 7: Results screen The Results screen displays all the requested results.
Front panel Waveform screen Press to display the Waveform screen. This screen shows waveforms of the measured data in continuous operating mode. Figure 8: Waveform screen The Waveform screen consists of two sections. At the top right of the display are the volts, amps and watts values for each of the channels in the group. The label for the channel is color coded to match the waveform. (See page 53, Graphs and waveforms.) Measurements are displayed even if the waveform is not.
Front panel When drawing a waveform, the phase reference signal for the group is started at the intersection of the X and Y axes. Choosing to display or not display the reference waveform will not affect the position of the other waveforms. For example, if Channel 1 volts was the phase reference and Channel 1 amps was 90 degrees lagging, but Channel 1 volts was not displayed, then Channel 1 amps would still start at 90 degrees lagging.
Front panel At the top of each graph are two readings and group and channel name. The first reading is the fundamental value, in the measured units, and phase angle. The second result is the highlighted harmonic in the same units as it would be displayed on the results screen (either percentage or absolute as defined by the users setting for the group) and the phase angle. The phase angle will be displayed irrespective of whether it is displayed on the results screen.
Front panel Integrator screen Press to display the Integrator screen. The Integrator screen allows you to display integrated results on a graph when in Integrator mode. (See page 43, Integrator mode.
Front panel As with the integrator itself, the results are displayed on a group-by-group basis. This means that the maximum number of plot lines is four, which will occur in a 3p4w system with sum results. There is the option of adding or removing plot lines from the display within the constraints of the group. For example, you could select to see the Channel 1 result and the Sum result.
Front panel Vector screen Press to display the Vector screen. The Vector screen displays one of volts, amps, or volts and amps harmonic information in the form of a vector diagram. Figure 11: Vector screen Vectors will be displayed on a per-group basis. The left and right arrow hard keys change the currently displayed group. The active group is displayed in the top left corner in the appropriate group color. The left and the right soft keys change the harmonic number currently being displayed.
Front panel The magnitude is based on the maximum range for the group being displayed (in auto range channels can be on different ranges). The ranges will not change when the harmonic number is changed, allowing a visual comparison between harmonic numbers. A summary of the soft keys is detailed below: Toggles the vectors displayed between volts only, amps only, and volt and amps together. Works on a per-group basis. Changes the harmonic vector displayed by one to the right (higher order).
Front panel Up to 30 math functions, labelled FN1 through FN30, can be defined. For each function the following can be specified: Name. User friendly name up to ten characters. (Default is the same as the label, for example, FN1). In the menus, the function label is always displayed alongside the users name for the function. Units. User friendly units such as W for watts. (Default is blank). Prefixes such as u, m, k, M will be added to the unit as appropriate. Units will be up to four characters. Function.
Front panel Figure 14: Setup screen (second screen) Front panel USB port Use the front panel USB port with an attached USB flash drive to capture screens or to collect data for use on another device. When you connect the flash drive to the USB port, the LED under the DATA OUT key momentarily turns on. When you press the SCREEN SAVE key, the instrument performs a screen capture and saves the screen to the flash drive. The LED under the DATA OUT key turns on while the screen is saved to the flash drive.
Front panel Soft keys Soft keys provide context-sensitive functionality. Common soft key images provide common functionality. The common soft keys are shown below. If the symbol on the key is gray, the limit has been reached. Details on the specialized soft keys are in the appropriate section of this manual. Page up Move up one result / menu line / help text line. No functionality Move down one result / menu line / help text line. Page down Go to the previous menu. Go to the next menu.
Front panel Menu and Help keys The Menu and Help keys are located above the operational and alphabet keys to the right of the display. Toggles the on screen menus on and off. The menu will always come on at the top level. Toggles on screen help that is context sensitive based on the current display. Pressing any other key, other than configured soft keys, when help is displayed, will have no effect. Press again to close the help screen.
Front panel number to avoid overwriting an existing file. The LED under the DATA OUT key turns on while the data is written to the flash drive. DATA OUT / JKL. Press this key to start or stop a data log. If data is being logged, then this key will flash. RESET/CLEAR / MNO. The function of this key depends on the configuration of the instrument. It can clear minimum / maximum hold results and reset the integrator. INTEG RUN / PQRS. Press this key to start or stop the integrator.
Front panel . / SPACE. Decimal point or, with SHIFT, space = / xy. Equals or, with SHIFT, X to the power Y +/– / x2. positive or negative or, with SHIFT, X squared SHIFT. Press this key to enter alternate functions on the keypad. ENTER / √. Enter or, with SHIFT, square root. Logging data to a storage device The PA3000 can log data to a USB flash drive. The unit will log all selected measurements into a comma separated value (.csv) formatted file that is stored on the connected USB flash drive.
Front panel Figure 16: Example data file Math results are also returned when data logging. These will be after the channel results. Only enabled math results will be returned. The column name will consist of the function name and the units specified by the user. Additional information on the front panel USB port and the USB flash drive requirements is available later in this document. (See page 146, Front panel USB host port.
Connecting signals Connecting signals Input overview WARNING. To avoid possible electric shock or personal injury: Do not touch connections, internal circuits, or measuring devices that are not connected to earth ground. Always adhere to the instructions regarding the sequence of connections. (See page 2, Connection sequence.) Signals are connected to the instrument on the rear of the power analzyer. There are multiple inputs for each analog card as shown below.
Connecting signals Table 2: Signal inputs on rear panel (cont.
Connecting signals To connect a simple current transformer To use a conventional current transformer (CT) like the Tektronix CL series (or any other transducer with a current output), connect the normal AHI and ALO inputs of the PA3000 to the outputs of the current transformer. Follow the manufacturer’s instructions for the safe use and installation of the transducer. Depending on the output level of the current transformer, you will need to choose between the 30 A AHI input and the 1 A AHI input.
Connecting signals Press Press to return to the measurement display. The PA3000 is now ready to make measurements using a CT. To connect an external resistive shunt Using a resistive shunt is a straightforward method of extending the current measuring range of the PA3000. The shunt resistor is connected in series with the load and the voltage across the shunt is directly proportional to current. That voltage can be connected directly to the External Current Inputs of the PA3000.
Connecting signals Remove any connections to the normal ALO terminal! WARNING. Connections to the normal AMPS terminals can have high voltage. To avoid errors and a risk of electric shock, remove all connections to ALO. EXT ALO and ALO are connected inside the PA3000 and so connections to AHI, ALO, and A1A can have the same potential as EXT ALO. 3. Set up the PA3000 to measure current from the EXT AHI and EXT ALO terminals. Press . Select Inputs and press . Select Shunt and press .
Connecting signals To connect a transducer with a voltage output These transducers contain active circuits that help to improve performance at high bandwidth. They can be of the Hall effect or Rogowski coil type. The procedure is similar to that of installing an external shunt as described above. 1. Follow the manufacturer’s instructions for the safe use and installation of the transducer. 2. Connect the voltage output to the EXT AHI and EXT ALO terminals of the PA3000 channel as above. 3.
Connecting signals Figure 20: Current transformer connections To connect a voltage transformer / transducer The PA3000 can be used with a voltage transformer (VT) or other transducer to extend its measuring range. Follow the manufacturer’s instructions for the safe use and installation of the transducer. The output of the transducer is connected to the normal VHI and VLO terminals. Normally the positive or HI output of the transducer will be marked with the point of an arrow or a + symbol.
Connecting signals The PA3000 is now ready to make measurements using a VT. Figure 21: External resistive shunt connections Power for external transducers The PA3000 has a ±15 V power supply for the purpose of providing power to external transducers. The supply is capable of supplying 250 mA per rail on each analog card (250 mA on +15 V and 250 mA on -15 V). The connector is conveniently placed next to the inputs on each analog card.
The menu system The menu system This section describes some of the key menus of the PA3000. Measurements Use the Measurements menu to set the order in which the measurements appear on the screen; default measurements are: Vrms, Arms, Watt, VA, PF, and Freq. This is on a per-group basis. The measurements, on a group-by-group basis, can be displayed in any order, including harmonics.
The menu system Selection down or bottom of list Select measurement to be a result on the screen or de-select measurement To navigate to a desired result, use the up and down arrow soft keys. The current selection will be highlighted in blue. If a result is selected, it has a green check mark at the right edge of the list. The results screen shows all the selected results, in the order in which they appear in the measurement list; the list only applies to the selected group. NOTE.
The menu system The following figure shows an example of a measurement being moved. Figure 23: Example of a moved measurement Measurement Configuration menu Use the Measurement Configuration menu to change the way some results are computed and displayed.
The menu system The top-level menu consists of the following submenus: Harmonics Setup. Use these menus to configure V, A, and W harmonics. Distortion Setup Minimum Hold Column Maximum Hold Column Sum Results Column Sum Voltage Formulas Sum Current Formulas Harmonics Setup Use the Harmonics Setup to configure how quantities of harmonics are setup and viewed as measurement results.
The menu system The reference value can be either the fundamental reading or the RMS reading. The default reference is the fundamental value. Total Harmonic Distortion. THD is a measure of the distortion of a waveform. Under the V and A measurement menus is the ability to set the following parameters: Harmonic Reference. Fundamental or RMS (default Fundamental). Harmonic Sequence. Odd and Even or Odd Only (default is Odd and Even). Harmonic Range. 2 to 100 (default 7).
The menu system and The weighting factors (kn) are: Table 3: Weighing factors for TIF Harm kn Harm kn Harm kn 1 0.
The menu system Sum Voltage and Sum Current Formulas The PA3000 provide a choice between two methods of summing voltage values and current values. The voltage methods are unrelated to the current methods. For a list of the sum voltage and current formulas, refer to sum equations later in this document. (See page 142, Sum equations.) Modes Modes are used to set up the instrument in specific way to allow certain types of measurements.
The menu system After selecting Ballast mode you need to set up the fundamental frequency at which power will be transmitted. This is typically 50, 60, or 400 Hz. The setup screen can be found under the Modes → Setup Modes → Ballast Setup. The power analyzer uses this to adjust the measurement window to fit the specified frequency. The returned frequency is not the fundamental power frequency; but the ballast switching frequency. This is also the frequency used for harmonic analysis.
The menu system The required measurements are selected in the Measurements menu. (See page 36, Measurements.) The integrator measurements are: Hours Watt-Hours VA-Hours VAr-Hours Amp-Hours Average Watts Average PF Correction VAr Fundamental VA-Hours (VAHf) Fundamental VAr-Hours (VArHf) These measurements are on a per-group basis. The measurements can only be selected and displayed when the group is in integrator mode.
The menu system Start method. The Start methods are described below. Manual start. This is the default method. Manual starting of integration is triggered with the INTEG RUN key on the front panel. Press this key to start the integrator running on all groups configured as integrator mode with a manual start and are currently not running. The LED under the key turns on. Clock start. Use this mode to set the time and date of when you want the integration to start for the group.
The menu system Correction VAr (CVArs). This parameter displays the values of VArs required to correct the average power factor to a target power factor. The target power factor is entered under the integrator setup screen under CVArs Power Factor. The correction will calculate the necessary VArs to provide a phase shift to reach a target power factor. It does not compute the total VArs. If a poor power factor is completely due to distortion, no amount of phase lead or lag will improve it.
The menu system Table 4: Effects of frequency range settings in PWM mode (cont.) Update rate (seconds) >10 Hz <900 Hz 1 – 100 Hz 0.1 Hz – 10 Hz 1.7 1.7 3.4 20.4 1.8 1.8 3.6 21.6 1.9 1.9 3.8 20.9 2.0 2.0 4.0 22.0 Results from channels not in PWM Motor mode will be returned at the specified rate. Inputs The Inputs menu provides configuration options for all physical signal inputs of the power analyzer. Use this menu and the submenus to configure all wiring and group settings.
The menu system Figure 26: Single-phase, three-wire. Select 1 phase, 3 wire Figure 27: Three-phase, three-wire (2 Wattmeter method). Select 3 phase, 3 wire Figure 28: Three phase, three wire (3 Wattmeter method). Select 3 phase, 3 wire (3V3A).
The menu system Figure 29: Three-phase, three-wire (3 Wattmeter method). Select 3 phase, 4 wire Figure 30: Three-phase, four-wire (3 Wattmeter method). Select 3 phase, 4 wire Depending on the wiring configuration, not all groups will be available. For example, if wiring is 1p2w for each channel, then the four channels will correspond to the four groups. If the wiring is 1p3w for group A, then Channels 1 and 2 will be in-group A. This leaves Channels 2 and 3 for a maximum of groups B and C.
The menu system Ranging Ranging sets the voltage or current range to a particular fixed range or to allow ranging to automatically occur, depending on the application. For example, current inrush testing requires the current range to be fixed; auto-ranging would not be fast enough to capture the highest current inrush. The list of available current ranges depends on the selected shunt. The ranges are set on a group basis.
The menu system Shunts. The power analyzer has three different current inputs, or shunts. They are: Internal 30 A. This is the default value and is used for normal current measurement up to 30 Arms (200 Apk). This selection uses the blue AHI and the gray ALO 4 mm sockets on the rear panel. Internal 1 A. This is used for small current measurements such as those found in standby power applications where current is less than 1 A.
The menu system The following selections are available: Volts. This is the default selection; the phase is calculated with respect to the voltage signal on the first channel in the group. Amps. Phase is calculated with respect to the current signal on the first channel in the group. External Frequency 1 / 2. Phase is calculated with respect to the external input signal. Frequency Range. There are three frequency ranges: >10 Hz. This is the default selection. 1 – 100 Hz 0.
The menu system External shunt scaling. This scaling is applied to the current measurement channel voltage inputs. This is used for current transducers that have a voltage output. These include Hall effect transducers as well as simple resistive shunts. The scaling factor is expressed in Amps (read) per Volt (applied). The default value is 1. This means that with 1 Vrms applied, the current channel will read 1 Arms. An example would be a clamp-on Hall effect current transducer measures up to 100 A.
The menu system VAr Hours Amp Hours Watts Average PF Average Volts Amps Watts Fundamental VA-Hours (VAHf) Fundamental VAr-Hours (VArHf) Correction VArs For each waveform selected, there is a choice on the graph menu to turn on or off the selected parameter for each channel in the group. Integrator graphing parameters are set on a per-group basis. To change groups use the left and right arrow keys at the bottom left of the display. Additional information is available for setting up the integrator.
The menu system Use the IP Selection Method menu, to opt for a dynamically assigned IP address, by selecting Set IP using DHCP, or a fixed/static IP address by selecting Fix IP Address. To view the current IP settings, press of the menu. and scroll to the bottom To configure the static IP address, choose Static IP Settings in the Ethernet Setup menu. This allows entry of the IP address, the subnet mask and the default gateway. After entering the relevant data press , in each menu, to apply.
The menu system Datalog You can configure the USB data logging interval. To configure the data logging interval, press , go to Interfaces and select USB Host Data Out. Math results The math results are displayed on a different results screen from the other results. This improves the ability to view math results. Normal measurement parameters can be displayed on the math results screen. They just have to be specified in a formula. (See page 20, Math screen.
The menu system You can specify any channel or group parameter listed below in addition to the voltage input on each of the four analog inputs. Valid characters are A-Z, 0-9, ., x, -, +, /, (, ), :, space , and ^ No more than 100 characters can be used The number format is [+/-][E[+/-]exponent] When entering a formula you can use the left and right arrow keys to move the cursor. This allows for easy correction and changing of complex formulas.
The menu system Table 7: Valid group parameters AN Neutral current (or phase 3 current for 3p3w) The valid group sum parameters are GRP followed by ":SUM:" and then one of the following parameters: Table 8: Valid group sum parameters VRMS Volts RMS ARMS Amps RMS W Watts VA Volt-Amps VAR Volt-Amps Reactive PF Power Factor AHR Ampere Hours WHR Watt Hours VAHR VA Hours VARH VAr Hours WAV Watts Average PFAV PF average TINT Integration Time CORRVARS Correction VArs WF Fundame
The menu system Operators that can be typed: SIN(), COS(), TAN(). These operators take an angle in degrees which is between the brackets and return its sine, cosine or tangent. ASIN(), ACOS(). These operators take a number between -1 and 1 which is between the brackets and return an angle in degrees. ATAN(). This operator takes a number that is between the brackets and returns an angle in degrees. LN(), LOG(). This operator returns the logarithm of the number between the brackets.
The menu system Update rate The update rate determines how often new results are available in the instrument. The values in the Update Rate menu list indicate the time interval (in seconds) between every update of the results. Restrictions are placed on the number and type of results permitted at faster update rates. The range is 0.2 s to 2 s in 0.1 s increments, where 0.5 is the default value. With update rates below 0.5 seconds, the number of results that can be updated at that rate is limited.
The menu system Analyzer Configuration (SETUP) The Analyzer Configuration menu has the same function as the key. Selecting this menu displays the complete instrument setup. Use the up and down soft keys to scroll through the configuration. Pressing the right arrow key changes the configuration screen to display information on the physical unit. This includes the serial number of the unit, the firmware version, and information on the main card and analog cards, including calibration date.
Remote operation Remote operation Overview Using the remote commands the instrument can be used to perform high speed, complex, or repetitive measurements. All PA3000 instrument communicate by RS-232, Ethernet, or USB as standard. Optionally, a GPIB port can be added. Interfacing with RS-232 systems The RS-232 port is a standard PC type 9-way male D-type located on the rear of the instrument and can be used for remote control of the PA3000. A modem cable should be used.
Remote operation Interfacing with GPIB systems (optional) The PA3000 optionally supports control via a GPIB port. This option must be installed by an authorized Tektronix representative. See IEEE 488/GPIB for a detailed pin description of the GPIB connector. (See page 148, IEEE 488 / GPIB (Optional).) Status reporting Status byte The PA3000 uses a similar status byte to IEEE 488.2. The PA3000 Status Byte Register (STB) contains the ESB and DAS bits.
Remote operation Status Byte Register (STB) Read by “*STB?”. Figure 32: Status byte register Table 10: Status byte register bit definitions Display Data Status Register (DSR) Bit Name Description 5 ESB Event status summary bit to show standard event status 0 DAS Display status summary bit to show display data Read by “:DSR?” or in summary by *STB? DAS bit. On power-up DSR is initialized to zero. When read using the “:DSR?” command the register bits are cleared.
Remote operation Standard Event Status Register (ESR) Read by “*ESR?” or in summary by the ESB bit in STB. Figure 35: Standard Event Status Register Table 13: Standard event status register bit definitions Bit Standard Event Status Enable Register (ESE) Name Description 5 CME Command error; command not recognized 4 EXE Command execution error 2 QYE Query error Read by “*ESE?” and set by “*ESE ”.
Remote operation Command listing The following conventions are used for command syntax: Square brackets indicate optional parameters or keywords [ ]. Angle brackets indicate values to be specified < >. Commands and responses are sent as ASCII strings terminated with a line feed. The PA3000 is not case sensitive and white space characters are ignored except where required between command and parameter.
Remote operation IEEE 488.2 standard commands and status commands *IDN? *CLS *ESE *ESE? Unit identity Syntax *IDN? Returns Tektronix, PA3000, serial number, firmware version Description The serial number is the serial number of the main chassis. The firmware version is the version of the firmware suite, which includes all processors. Clear event status Syntax *CLS Description This command clears all event registers and queues.
Remote operation *RST Reset device Syntax *RST Description This command resets the unit configuration to default values (performs the same action as Load Default Configuration menu option on the front panel). Allow at least three seconds after sending the *RST command before sending further commands to allow all defaults to be processed and set. *STB? :DSE :DSE? :DSR? :DVC Read status byte Syntax *STB? Returns 0 – 255 Description This command returns the value in the status byte.
Remote operation Channel and group commands The following commands are used to select the active group or channel. They are similar in concept to pressing the left and right arrow keys to change the group or channel while displaying a menu screen. :INST:NSEL :INST:NSEL? :INST:NSELC :INST:NSELC? Set active group Syntax :INST:NSEL Description This command sets the specified group as the active group for command and actions that might follow. Not affected by reset.
Remote operation Unit information commands The Unit Information commands are commands that are used to return information on the unit beyond the information returned by the *IDN? command. :CAL:DATE? :SYST:CTYPE? Calibration date Syntax :CAL:DATE? , Returns Appropriate calibration date in the format dd-mm-yyyy Description This command returns the calibration date from the designated analog card. can be either 1 for date verified or 2 for date adjusted.
Remote operation :SEL Select results Syntax :SEL:ALL :SEL:ALL:GRP :SEL:CLR :SEL:CLR:GRP :SEL: Where is a group number 1 through 4.
Remote operation Select results (cont.) VAF – Fundamental VA VARF – Fundamental VAr PFF – Fundamental Power Factor VRNG – Voltage range ARNG – Current range VLL – Line-to-line voltage VLN – Line-to-neutral voltage VHM – Volts harmonics AHM – Amps harmonics WHM – Watts harmonics Description :SEL determines which results are displayed on the screen, also the results returned by the :FRD? command. To see the currently selected command, use the :FRF? command. :SEL:ALL selects all results.
Remote operation :FRF? Read selected results Syntax :FRF? :FRF:GRP? :FRF:CH? Where is a group number 1 through 4 Where is a channel number 1 through 4 :MOVE Description :FRF? and :FRF:GRP? commands return a list of the displayed results. The actual result is not returned. Returns , , , , , ..., , , ...
Remote operation :FRD? Read foreground data Syntax :FRD? :FRD:CH? :FRD:GRP? Where is a channel number 1 through 4 Where is a group number 1 through 4 Description The commands returns results from the power analyzer. The results are returned in the order in which they are displayed on the screen. Each result is a floating point number separated by a comma. The sequence is determined by order in which results are displayed on the front panel.
Remote operation Harmonics configuration (cont.) Syntax :HMX:VLT:RNG :HMX:AMP:RNG :HMX:WAT:RNG Where is the maximum harmonic to be display in the range of 1 to 100 Description If harmonics measurements are selected with the :SEL command (See page 71.), the power analyzer will display all the harmonics up to the number specified by . The displayed harmonics can be restricted to only odd numbered harmonics using the harmonic sequence command.
Remote operation :HMX:VLT/AMP:PHA Display phase angle Syntax :HMX:AMP:PHA :HMX:VLT:PHA Where is 0 for on or 1 for off Description This command turns the display of the voltage or current phase angle on or off (default On). Syntax :HMX:AMP:PHA? :HMX:VLT:PHA? Returns :HMX:VLT/AMP:THD 0 or 1 Commands for setting up the total harmonic distortion measurements.
Remote operation Total harmonic distortion setup (cont.) Syntax :HMX:VLT:THD:NZ :HMX:AMP:THD:NZ Where is 0 for exclude or 1 for include Description :HMX:VLT/AMP:TIF For total harmonic distortion (THD) readings, the formula can either include or exclude the DC component. This command works on a group. Use the :INST:NSEL command first to select the active group.
Remote operation :MAX Maximum column Syntax :MAX Where is 0 for disabled or 1 for enabled :SUM Description The MAX command adds a column to the results that displays the maximum value of each parameter since the last time the maximum values were reset. A column is added for each channel in the group, as well as for sum results, if they are selected. Enabling the column will always reset the MIN and MAX values for the currently selected group.
Remote operation Sum results (cont.) Syntax :SUM:AMP:METHD? :SUM:VLT:METHD? Returns The summation method (1 or 2) Mode setup commands The mode setup commands correspond to the Modes menu. (See page 42, Modes.) They are used to control how groups are configured to measure parameters in certain conditions.
Remote operation Ballast mode (cont.) :MOD:SBY Returns Ballast frequency for the selected group Description This command returns the ballast frequency for the active group. Standby mode Syntax :MOD:SBY:PER Where is the standby power integration period in the range of 1 to 1200 seconds as an integer :MOD:INT Description This command will set the integration period for standby power mode. (See page 43, Standby Power mode.
Remote operation Integrator mode (cont.) Description This command sets the channel to use for level trigger. Specified as 1, 2, 3, or 4. If the channel number is not valid, then the ESR bit will be set.
Remote operation Integrator mode (cont.) Description This command sets the direction of signal change when using level trigger start. Syntax :MOD:INT:DUR Where is the time in minutes Description This command sets the duration for integration, a value of 0.0 to 10,000. Syntax :MOD:INT:PF Where is the desired power factor :MOD:PWM 82 Description This command sets the desired power factor for correction VArs, a value of +1.0 to –1.0.
Remote operation Input setup commands The input setup commands correspond to the Inputs menu. (See page 47, Inputs.) They are used to control how signal inputs to the PA3000 are channelled and controlled. :WRG Wiring configuration Syntax :WRG:1P2 - Set 1 phase, 2 wire :WRG:1P3 - Set 1 phase, 3 wire :WRG:3P3 - Set 3 phase, 3 wire :WRG:3P4 - Set 3 phase, 4 wire :WRG:3P3V3A - Set 3 phase, 3 wire (3V3A) :NAME Description This command sets up the wiring configuration for the group currently selected.
Remote operation :RNG Ranging Syntax :RNG:VLT:FIX :RNG:AMP:FIX :RNG:VLT:AUT :RNG:AMP:AUT VLT – set voltage ranging AMP – set current ranging FIX – fixed ranging AUT – auto ranging Where is the range number from 4 to 12 Description This command sets the range for the currently selected group, Use the :INST:NSEL command first to select the active group. The range numbers for each input are defined in the following table.
Remote operation :SHU Shunt selection Syntax :SHU:INT :SHU:INT1A :SHU:EXT INT – set internal 30 Arms shunt INT1A – set internal 1 Arms shunt EXT – set external shunt :FSR Description This command sets the shunt for all channels in the currently selected group. Use the :INST:NSEL command first to select the active group. Syntax :SHU? Returns 0, 1, or 2 Description This command returns the shunt setting for the currently selected group.
Remote operation Frequency settings (cont.) Syntax :FSR:PHR:VLT - Set the voltage channel as the reference. :FSR:PHR:AMP - Set the current channel as the reference. Description These commands set the phase reference for the group to be either the voltage or the current channel of the first card in the group. The commands work on a group. Use the :INST:NSEL command first to select the active group.
Remote operation :BDW Bandwidth Syntax :BDW Where is 0 or 1 :SCL Description This command sets the bandwidth of all voltage and current measurement channels in the active group. 0 = high bandwidth and 1 = low bandwidth. Low bandwidth mode introduces a 10 kHz 2-pole filter into the voltage and current measurement channels. Syntax :BDW? Returns 0 or 1 Description This command returns the currently configured bandwidth for the selected group.
Remote operation Scaling (cont.) :ANA Returns A number from 0.00001 to 100000 Description This command is linked to a channel, not a group. It returns the scaling factor for the currently selected channel. Use the :INST:NSELC command first to select the active channel. Analog inputs Syntax :ANA , Where is an input number 1 through 4 and = 1 or 10 Description This command sets the analog inputs 1 though 4. If is 1, then the ±1 V range selected.
Remote operation Interface commands Interface commands are used to set up and control the various ways of communicating with the power analyzer. :COM:RS2 RS-232 configuration Syntax :COM:RS2:BAUD Where is a baud rate of 9600, 19200, or 38400 :COM:IEE Description This command sets the RS-232 baud rate.
Remote operation Static Ethernet configuration (cont.) Syntax :COM:ETH:STAT? Returns 0 or 1 Syntax :COM:ETH:STAT:SUB :COM:ETH:STAT:IP :COM:ETH:STAT:GATE SUB – Subnet mask IP – P address GATE – Default gateway Where is in the format xxx.xxx.xxx.xxx Description These commands set the assigned static IP values for the power analyzer.
Remote operation Screen save commands :DISP:DATA? Display data Syntax :DISP:DATA? Description The command freezes the display and returns a bitmap image of the screen. Once the transfer is complete the display will update normally. The binary data is the contents of a .bmp file and can be written directly to a file on a host computer. Returns This command returns a bitmap image as an IEEE 488.2 formatted response.
Remote operation Math function enable (cont.) Syntax :MATH:FUNC:EN? Where is a valid math function number between 1 and 30 Description :MATH? This command returns the status of whether a math function is enabled (1) or disabled (0). Return MATH results Syntax :MATH? Description This command returns all the calculated math functions that are enabled in a comma-separated string.
Remote operation Averaging (cont.) Description The command sets the averaging depth of the selected channel. The sample period can also be changed using the :UPDATE command. The averaging buffer will be reset whenever the signal changes by more than 20% of the average. Syntax :AVG:CH? Description This command returns the averaging value as an integer.
Remote operation :SYST:DATE System date Syntax :SYST:DATE? :SYST:DATE:SET :SYST:DATE:FORMAT Where is the new date in the selected format and is the date format :SYST:TIME Returns Date formatted in the way specified by the user separated by forward slashes (/) Description The :SYST:DATE? command returns the date on the power analyzer. The :SYST:DATE:SET command sets the date on the power analyzer.
Remote operation :SYST:POWER Power usage Syntax :SYST:POWER:DISP Where is 0, 1, or 2 Description This command allows the display to be switched off to reduce the power consumption of the power analyzer.
Remote operation Sending and receiving commands There are many ways in which to send commands to the PA3000, but there are some common rules for all methods: All instructions should be terminated with a line feed (ASCII 10) character. All returned information will be terminated by a line feed (ASCII 10) character. Only one instruction can be sent at a time. For example, :SEL:VLT;:SEL:AMP is not a valid command. For all commands that configure the unit, allow 0.
Remote operation Communications examples Basic selection and returning of results The results are returned using the FRD command. This returns the results that are shown on the screen, in the order in which they appear on the screen. As results are selected using remote control, the results are added to the bottom of the list, with the exception of harmonics, which always appear at the end of the list.
Remote operation Harmonics To return harmonics, first the number of harmonic and the scope need to be selected and then they need to be added to the list of results on the display. :HMX:VLT:SEQ 0 Select odd and even harmonics (use 1 to select odd harmonics only). :HMX:VLT:RNG 9 Return all harmonics from 1 to 9. :SEL:VHM Add Voltage harmonics to the list.
Remote operation While dsr <> 3 Poll in a continuous loop until DSR = 3. :DSR? Loop :FRD:GRP1? PA3000 Power Analyzer User Manual Read the measured data, which will be shown as follows in floating point format: Vrms, Watts, Arms, Freq, Power Factor, VA Power, Vrms, Watts, Arms, Freq, Power Factor, VA Power.
PA3000 software PA3000 software PWRVIEW PC software PWRVIEW is a supporting software application for Windows PCs that compliments and extends the functionality of the power analyzer. Figure 37: PWRVIEW software PWRVIEW is a free download from www.tek.
PA3000 software Create and log formulas for the calculation of power conversion efficiency and other values Export measurement data to .csv or .xls format for import into other applications Automate instrument setup, data collection, and report generation for key applications with just a few clicks, using wizard-driven interfaces Perform automated full compliance testing for Low Power Standby per IEC 62301 Ed. 2.0 Perform automated pre-compliance testing for current harmonics per IEC 61000-3-2:2014 Ed.
PA3000 software The software supports the downloading of firmware through USB. 1. Select PA3000 as the Device Type. 2. Click the Test USB button to see the serial number and firmware version of the PA3000. 3. Point the software to the firmware file. The file will be named in the form of “PA3000_va_b_c.bin” where a, b, and c are decimal numbers representing the firmware version number; such as, PA3000_v3_1_0.bin. The file can also be found on Tektronix Web site under the PA3000 page. 4.
Application examples Application examples Most single and three phase power measurements can be made on a PA3000 using the default settings.
Application examples Example 1: Efficiency testing single phase applications The push towards green energy in recent years has raised the standards for efficiency across all electronic and electrical products. Stricter energy standards such as Level VI efficiency protocol, command tighter limits on efficiency which makes it important to accurately measure input and output power and simultaneously calculate efficiency over different load and source conditions.
Application examples 3. After making all of the connections, use one of the two methods to make the efficiency measurements. Figure 38: AC-DC efficiency measurement wiring diagram Method 1: Efficiency measurements on single phase AC-DC power supplies. (PA3000 direct) The following steps describe the process for setting up the PA3000 for efficiency measurements on and AC-DC power supply.
Application examples 1. Set the PA3000 to the default configuration: a. Press . . b. Scroll down to User Configuration and press c. Select Load Default Configuration, and then press to confirm. The PA3000 will load the defaults and display a confirmation screen. Press and then return to the Main Menu by pressing 2. In the Main Menu, go to Measurements, press desired parameters for the AC input signal. .
Application examples 10. For the efficiency calculations, enter (CH2:W/CH1:W)*100 and then press . Press to go back to the Math menu where the function can be renamed and units can be added, if desired. 11. Go back to the Math menu and scroll down to the newly edited function and enable the function by pressing . Select all functions that need to be displayed on the screen. 12. Press to view the Results screen. 13. To view selected math formulas, press . 14.
Application examples Figure 40: Harmonic bar chart on the PA3000 Method 2: Efficiency measurements on single phase AC-DC power supplies. (PWRVIEW software) The following steps describe the process for setting up the PWRVIEW software with a PA3000 for efficiency measurements.
Application examples 1. Connect the PA3000 to the computer with the PWRVIEW software installed using the supplied USB cable. Ethernet or GPIB can also be used, if desired. 2. Open the PWRVIEW software by double-clicking the desktop icon. 3. Click the Add button to connect the PA3000. All available instruments will be listed in the selection panel. 4. Select the desired instrument (the PA3000) and then click Connect. NOTE.
Application examples Figure 42: Efficiency Trend Chart Waveforms in the PWRVIEW software are constructed using the harmonic data collected from the power analyzer. The accuracy of the waveform depends on the amount of harmonic information available. For optimum results, select maximum number of harmonics to display in the setup area. Selecting 100 harmonics for the PA3000 gives the best results. If no harmonics are selected, waveform feature will display a blank screen.
Application examples Figure 43: Logging setup To record data using PWRVIEW, click the Record button on the menu bar. The software will start recording all the selected data including formulas and limits. To change the data logging rate or to set the total log time, click the down arrow on the Record icon to open the data logging setup. Here you can select the desired logging duration and interval. To stop the data logging, click the Stop button.
Application examples Figure 44: Custom limits setup To set custom limits, either right-click the desired measurement parameter or click the Limits Setup icon on the menu bar. Stop the measurement update to set up custom limits. Custom limits will appear as a separate tab on the measurement grid. The result column will display red fonts if the limits are failing. Hovering over the results will display the limit function, limit value, and relative value.
Application examples Measurement solutions There are two main wiring configuration that can be used while measuring three phase power. The two wattmeter method is common with 3-phase, 3-wire applications and three wattmeter method is common with 3-phase, 4-wire applications. Refer to the wiring section for details on all available wiring configurations. (See page 47, Wiring.
Application examples Figure 45: PWM motor drive efficiency (1 phase in and 3 phase out) 4. After making all of the connections, set the PA3000 to the default configuration: a. Press . b. Scroll down to User Configuration and press . c. Select Load Default Configuration, and then press to confirm. The PA3000 will load the defaults and display a confirmation screen. Press and then return to the Main Menu by pressing . 5.
Application examples The PWM Mode is not required for the input line frequency measurements. The PWM Mode and other modes are described under the Modes section. (See page 42, Modes.) 8. To enable sum measurements for the three phase output on group B, enable the Sum Results column by entering the Main Menu and going to Measurement Configuration → Sum Results Column → Enabled. 9. To make the efficiency measurements, enable the Math function by pressing and then pressing the MATH soft key. 10.
Application examples Refer to the pin number for desired analog or counter input under Auxiliary inputs/outputs and connect the signal (torque, speed, or others) directly to the respective pin on the AUXILIARY INPUTS/OUTPUTS connector on the rear panel. The auxiliary inputs can be enabled and viewed through the math screen. Press and then press the MATH soft key to enter options.
Application examples To monitor AC waveforms, harmonics, or the vector graph use the , or , keys respectively. Switch between channels using the arrow keys on the front panel. Select various options for viewing waveforms and harmonics within the Vector and Waveforms menus. Method 2: Efficiency measurements on three phase PWM motor drive (PWRVIEW software) This method discusses efficiency measurement on three phase input and output PWM motor drives using the PWRVIEW software. Test setup 1.
Application examples 4. Open the PWRVIEW software by double-clicking the desktop icon. 5. Click the Add button to connect the PA3000. All available instruments will be listed in the selection panel. Select the desired instrument (the PA3000) and then click Connect. NOTE. There are various default applications and compliance tests on the left panel that you can select from. 6. Select PWM Motor Drive Efficiency under the Applications/Test section on the left panel and then click the Wizard button.
Application examples Figure 48: Auxiliary inputs setup for torque and speed measurements Refer to the pin number for desired analog or counter input under Auxiliary inputs/outputs and connect the signal (torque, speed, or others) directly to the respective pin on the AUXILIARY INPUTS/OUTPUTS connector on the rear panel. To enable the auxiliary inputs using PWRVIEW, go to the Setup tab.
Application examples Figure 49: Harmonic bar chart Waveforms in the PWRVIEW software are constructed using the harmonic data collected from the PA3000. The accuracy of the waveform depends on the harmonic information available. For optimum results, select the maximum number of harmonics to display in the setup area. Selecting 100 harmonics for the PA3000 gives the best results. If no harmonics are selected, waveform feature will display a blank screen.
Application examples All the recorded data is stored in a database on the local computer. To access the data, click the Results tab and then click the Measure icon. The dialog box will present all the archived data. Select the desired data set and export to either an Excel or a .csv format. Custom limits. Custom limits can also be set with any of the measurement parameters. Custom limits help set limits based on various standards or test specifications.
Application examples 1. Connect the AC input on the DUT to the first channel of the PA3000 using a Tektronix Breakout Box (BB1000) as shown in the wiring diagram. The breakout box taps in to the current signal and measures the voltage across the input terminals. It makes it easier and safer to connect the input AC signal on the DUT using the 4 mm safety leads provided with the PA3000. 2. After making all of the connections, use one of the two methods to make the efficiency measurements.
Application examples Method 1: Energy consumption measurements (PA3000 direct) The following steps describe the process to set up energy consumption testing on home or office appliances using the PA3000. Figure 51: Energy consumption testing on the PA3000 1. Set the PA3000 to the default configuration: a. Press . b. Scroll down to User Configuration and press . c. Select Load Default Configuration, and then press to confirm. The PA3000 will load the defaults and display a confirmation screen.
Application examples 4. Go back to the Integrator Setup menu to configure the clock start, duration or the trigger level. NOTE. The Integrator Setup menu also provides an option to set up the target power factor for the design. This feature displays the value of VArs required to correct the average power factor to the target power factor. Refer to the Integrator mode section of this manual for more information on each option. (See page 43, Integrator mode.) 5.
Application examples message will display. This will not harm the PA3000. The range should not be set too high as this will compromise the overall accuracy. Method 2: Energy consumption testing (PWRVIEW software) The following steps describe the process to set up energy consumption tests on home or office appliances using a PA3000 along with the PWRVIEW software. 1. Use the same test setup as with the preceding PA3000 direct example. 2.
Application examples Figure 52: Integration Trend chart The Trend chart can be activated for any integration measurement by either right-clicking the desired parameter or by clicking the Trend icon on the menu bar. The Trend chart can be reset by using the Reset button on the menu bar. Data logging. Recording data is important for most energy consumption testing. To record data using PWRVIEW, click the Record button on the menu bar.
Application examples Figure 53: Custom Limits To set custom limits, either right-click the desired measurement parameter or click the Limits Setup icon on the menu bar. Stop the measurement update to set up custom limits. Custom limits will appear as a separate tab on the measurement grid. The result column will display red fonts if the limits are failing. Hovering over the results will display the limit function, limit value, and relative value. Example 4: Standby power measurements (IEC 62301 Ed. 2.
Application examples To meet the standby regulations, the power supply often operates in burst mode, where, the power is drawn in small bursts and then the circuit is forced to sleep. To make accurate standby measurements in burst mode, the PA3000 executes following: Samples the waveforms continuously such that no data is missed. Averages all the measured data to produce a stable result.
Application examples Method 1: Standby power quick check (PA3000 direct) The front-panel mode of the PA3000 is designed to give product designers a fast, yet reliable, check of standby power consumption. Enabling standby power mode automatically sets a long averaging time to average the typical power variations and bursts and it disables low-level blanking so that very low power and current values can be displayed. NOTE. The PA3000 samples continuously in standby mode to ensure that no data is lost.
Application examples Ranging. By default the PA3000 is auto-ranging. Auto-ranging is fast and generally unnoticeable, but might lead to loss of data while auto-ranging occurs. Using a fixed range while measuring standby power ensures that no data is lost during the ranging process. To set a fixed range, choose Inputs → Ranging → Current Range and then choose a suitable fixed range, based on the measurements made during auto-ranging. If the range is too low, a warning message will display.
Application examples 1. Use the same test setup as with the preceding PA3000 direct example. 2. After making all of the power connections, connect the PA3000 to the computer with the PWRVIEW software installed using the supplied USB cable. Ethernet or GPIB can also be used, if desired. 3. Open the PWRVIEW software by double-clicking the desktop icon. 4. Click the Add button to connect the PA3000. All available instruments will be listed in the selection panel. 5.
Application examples The test will display the Pass/Fail status based on all evaluated parameters. The test summary can be reviewed under the Results tab. All of the required parameters will be summarized with a Pass/Fail status under Test Summary and General Results. The Power Readings tab allows you to scroll through the time scale and to debug specific issues on a given time stamp. Use the scroll bar on the top of the window to scroll through the time line.
Application examples Bandwidth. For low power standby signals that have undesired high frequency components, low bandwidth filters can be enabled. A low bandwidth 10 kHz filter is available through the Setup screen under the Filter drop down option. Applying low pass filters might vary the RMS values of voltage, currents, and power as high frequency components affect the RMS values. AC source.
Application examples Figure 58: Inrush current measurement wiring diagram Method 1: Inrush current measurements (PA3000 direct) The following steps describe the process for setting up the PA3000 for the inrush current measurements. 1. Set the PA3000 to the default configuration: a. Press . b. Scroll down to User Configuration and press . c. Select Load Default Configuration, and then press to confirm. The PA3000 will load the defaults and display a confirmation screen.
Application examples 3. The PA3000 automatically blanks all the results that are lower than ten percent of the range. Blanking is continuously active and can interfere with recording the inrush event. To disable the blanking, go to the Main Menu, go to System Configuration → Blanking → Off. 4. Set the averaging to one so that the results are not averaged over time. Go to the Main Menu, go to System Configuration → Averaging → Channel Averaging. Set the value in the window to 1. 5.
Application examples Tektronix recommends to repeat the inrush current measurements by connecting the DUT several times to capture the highest possible peak value. The highest possible peak value occurs on the peak voltage cycle and it is important to capture this point for the maximum inrush current. It is also important to wait a few moments between connecting the DUT to allow the input capacitance on the device to completely discharge. Further settings if required Data logging.
Application examples 3. Open the PWRVIEW software by double-clicking the desktop icon. 4. Click the Add button to connect the PA3000. All available instruments will be listed in the selection panel. 5. Select the desired instrument (the PA3000) and then click Connect. 6. On the Setup page, select the Group A tab. 7. Select the highest current range from the Range selection under the Current Channel settings. Any other range can be selected if the expected peak inrush current is known. 8.
Application examples All the recorded data is stored in a database on the local computer. To access the data, click the Results tab and then click the Measure icon. The dialog box will present all the archived data. Select the desired data set and export to either an Excel or a .csv format.
Reference information Reference information Measured parameters Table 15: Phase measurements Abbreviation Description Units Vrms RMS Voltage Volts (V) Arms RMS Current Amps (A) F Frequency Hertz (Hz) W True Power Watts (W) PF Power factor VA Apparent Power Volt-Amps (VA) VAr Reactive Power Volt-Amps Reactive (VAr) Vpk+ Positive Peak Voltage Volts (V) Vpk- Negative Peak Voltage Volts (V) Apk+ Positive Peak Current Amps (A) Apk- Negative Peak Current Amps (A) Vdc DC Voltag
Reference information Table 15: Phase measurements (cont.
Reference information Accuracy equations The following table lists formulas for calculating the accuracy specification for each measurement. In the following equations: It is assumed the waveform measured is a sine wave. V is the voltage measured in volts. A is the current measured in amperes. Θ is the phase angle in degrees (phase of the current with reference to the voltage).
Reference information Table 16: Measurement accuracy (cont.) Parameter Description 1 TIF accuracy Impedance – Z, R, and X Z Accuracy R Accuracy X accuracy 1 “acc” represents accuracy in the equations. Sum equations The following tables list different equations that can be used for summing voltage and current values; the voltage methods are unrelated to the current methods. The equations depend on the wiring configurations.
Reference information Table 17: One phase, three wire sum equations (cont.
Reference information Table 18: Three phase, three wire sum equations (cont.
Reference information Table 19: Three phase, four wire sum equations (cont.
Reference information Table 19: Three phase, four wire sum equations (cont.) Communication ports The PA3000 is fitted with RS-232, Ethernet, and USB as standard. GPIB is available as an option. A USB host port is located on the front panel; other communication ports are located on the rear panel. Front panel USB host port Single port on the front panel USB 2.
Reference information Rear panel communication ports The following figure and table describe the communication ports located on the rear panel of the power analyzer. Figure 61: Power analyzer communication ports on the rear panel Table 21: Communication ports on the rear panel Item Description 1 USB peripheral. Connects the power analyzer to a host PC.
Reference information TCP/IP connection on port 5025 DST connection on port 5030 Table 22: Ethernet pin descriptions Pin Signal name 1 Data (Tx+) 2 Data (Tx-) 3 Data (Rx+) 4 Ground 5 Ground 6 Data (Rx-) 7 Ground 8 Ground IEEE 488 / GPIB (Optional). The IEEE 488 port is compatible with normal GPIB cables that will work with the PA3000.
Reference information Auxiliary inputs/outputs. The PA3000 is fitted with a number of auxiliary inputs and outputs.
Reference information 150 PA3000 Power Analyzer User Manual
Index A accuracy equations, 141 :ANA, 88 analog inputs, 53 analog inputs command, 88 application examples, 103 efficiency measurements, 104 autozero, 60 autozero command, 93 auxiliary inputs/outputs, 149 averaging, 59 averaging command, 92 :AVG, 92 B ballast mode, 42 ballast mode command, 79 bandwidth command, 87 Bar chart screen, 15 basic installation, 1 baud rate, 54 :BDW, 87 blanking, 59 blanking command, 92 :BLK, 92 .
Index front panel alphabetical keys, 24 Bar chart screen, 15 controls and connectors, 11 formula keys, 25 Help key, 24 Integrator screen, 17 Math screen, 20 Menu key, 24 number keys, 25 operation, 11 operational keys, 24 quick view keys, 12 Results screen, 13 Setup screens, 21 soft keys, 23 USB port, 22 Vector screen, 19 Waveform screen, 14 :FSR, 85 G getting started, 1 global settings, 3 GPIB, 54 GPIB commands, 67 GPIB configuration command, 89 graph and waveform commands, 88 graphs, 53 graphs and wavefo
Index measurement configuration commands, 74 :HMX:VLT/AMP, 74 :HMX:VLT/AMP:DF, 75 :HMX:VLT/AMP:PHA, 76 :HMX:VLT?AMP:THD, 76 :HMX:VLT/AMP:TIF, 77 :MAX, 78 :MIN, 77 :SUM, 78 Measurement Configuration menu, 38 measurement reading commands, 70 measurement selection and reading commands :FRD?, 74 :FRF?, 73 :MOVE, 73 :SEL, 71 measurement selection commands, 70 measurements configuration, 38 distortion set up, 39 harmonics setup, 39 maximum hold columns, 41 minimum hold columns, 41 sum current formulas, 42 sum re
Index standby mode command, 80 standby power mode, 43 starting integration, 45 Static Ethernet configuration command, 89 status reporting, 63 display data status enable register, 64 display data status register, 64 standard event status enable register, 65 standard event status register, 65 status byte, 63 status byte register, 64 *STB?, 68 stopping integration, 45 :SUM, 78 sum current formulas, 42 sum equations one phase, three wire, 142 three phase, four wire, 144 three phase, three wire, 143 sum results
