Tektronix TPS2PWR1 User Manual
Tektronix TPS2PWR1 User Manual

Tektronix TPS2PWR1 User Manual

Power analysis application

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C C a l l ( 7 3 2 ) 9 1 9 - 3 3 3 9 o r e ma i l s a l e s @a l l t e s t . n e t .

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Summary of Contents for Tektronix TPS2PWR1

  • Page 1 T h e t e s t & me a s u r e me n t e q u i p me n t y o u n e e d a t t h e p r i c e y o u w a n t . A l l t e s t I n s t r u me n t s , I n c .
  • Page 2 User Manual TPS2PWR1 Power Analysis Application 071-1452-01 www.tektronix.com...
  • Page 3 Copyright © Tektronix, Inc. All rights reserved. Licensed software products are owned by Tektronix or its suppliers and are protected by United States copyright laws and international treaty provisions. Use, duplication, or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013, or subparagraphs (c)(1)
  • Page 4 Tektronix, shipping charges prepaid and with a copy of Customer proof of purchase. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located.
  • Page 5 WARRANTY (Continued) TPS2PWR1 Application THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
  • Page 6: Table Of Contents

    ....... . . 2- - 43 TPS2PWR1 Power Analysis User Manual...
  • Page 7: General Safety Summary

    Consult the product manual for further ratings information before making connections to the product. Use Proper Probe. To avoid shock hazard, use a properly rated probe for your measurement. TPS2PWR1 Power Analysis User Manual...
  • Page 8 Do not operate in an environment where conductive pollutants may be present. See Appendix A of the TPS2000 Oscilloscope User Manual for Environmental characteristics. Do Not Operate in Wet/Damp Conditions. Do Not Operate in an Explosive Atmosphere. Keep Product Surfaces Clean and Dry. TPS2PWR1 Power Analysis User Manual...
  • Page 9 Readjust the vertical scale or position or press the front-panel AUTOSET button. TPS2PWR1 Power Analysis User Manual...
  • Page 10 WARNING indicates an injury hazard not immediately accessible as you read the marking. CAUTION indicates a hazard to property including the product. Symbols on the Product. These symbols may appear on the product: Standby CAUTION Chassis Ground Refer to Manual TPS2PWR1 Power Analysis User Manual...
  • Page 11: Contacting Tektronix

    This phone number is toll free in North America. After office hours, please leave a voice mail message. Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web site for a list of offices. TPS2PWR1 Power Analysis User Manual...
  • Page 12: Getting Started

    Getting Started...
  • Page 14 Getting Started The TPS2PWR1 Power Analysis application software adds power measurements to a TPS2000 series oscilloscope. Specific features include: H Power Analysis - - Calculates the true power, reactive power, power factor, and phase angle for a pair of voltage and current waveforms.
  • Page 15: Basic Operation

    The rating for the P5120 passive high voltage probe is: 1000 V CAT II probe tip to earth ground. The probe reference lead is rated to float to 600 V CAT II to earth ground. TPS2PWR1 Power Analysis User Manual 1- 2...
  • Page 16 H CAT II: Local level mains, appliances, portable equipment H CAT I: Signal level, special equipment or parts of equipment, telecommunications, electronics More complete product specifications are contained in the User Manual for the TPS2000 and for the various probes. TPS2PWR1 Power Analysis User Manual 1- 3...
  • Page 17: Start Up

    Getting Started Start Up To install a TPS2PWR1 application module on your TPS2000 series oscilloscope, follow these steps. Observe ESD precautions. To avoid damage to the oscilloscope or the application module, observe proper electrostatic discharge (ESD) precautions. Use an ESD strap.
  • Page 18 CH 1 probe in place. Connect the probe tip and reference lead to the PROBE COMP termi- nals. Repeat this process for each probe. Degauss current probes, if required. TPS2PWR1 Power Analysis User Manual 1- 5...
  • Page 19 S the amplitude of each waveform is more than two divisions S all waveform data points are on the screen S each cycle occupies at least one horizontal division TPS2PWR1 Power Analysis User Manual 1- 6...
  • Page 20 CH2, and, for 4 channel models, CH3 Harmonics Fundamental RMS, Harmonics phase, frequency, and RMS. Switching Loss Turn-on, turn-off, conduction, and total loss For further information on general set up of the oscilloscope, refer to the TPS2000 User Manual. TPS2PWR1 Power Analysis User Manual 1- 7...
  • Page 21: Checking Module Installation

    Troubleshooting Module Installation on page 1- - 9. To check this Push this module front-panel button Check for TPS2PWR1 APPLICATION A menu appears on the right-side of the screen with the title labelled: Power TPS2PWR1 Power Analysis User Manual 1- 8...
  • Page 22: Troubleshooting Module Installation

    6. Power on the oscilloscope. If the oscilloscope still does not show the application menu item, you have a problem with the application module or the module slot. Contact the nearest Tektronix service center to resolve the problem. TPS2PWR1 Power Analysis User Manual 1- 9...
  • Page 23 Getting Started TPS2PWR1 Power Analysis User Manual 1- 10...
  • Page 24: Reference

    Reference...
  • Page 26: Power Analysis

    CAT III) or similarly rated, passive, high voltage probe or an appropriately rated, high voltage, differential probe when floating the reference lead above 30 V , subject to the ratings of such high voltage probe. TPS2PWR1 Power Analysis User Manual 2- 1...
  • Page 27 Math waveform of the instanta- neous power function (V*A). These power analysis functions analyze the interaction of the source current and voltage waveforms. These operations require the use of both a voltage and a current probe. TPS2PWR1 Power Analysis User Manual 2- 2...
  • Page 28 Calculated by multiplying together the RMS value of the voltage waveform, the RMS value of the current waveform, and the sine of the phase angle. The computation of phase angle is explained in the phase angle section of the manual. TPS2PWR1 Power Analysis User Manual 2- 3...
  • Page 29 For non--sinusoidal waveforms, the two phase angle measurements may differ. The angle is positive if the CH1 waveform (typically voltage) leads the CH2 waveform (typically current). The angle is negative if the CH1 waveform lags behind the CH2 waveform. TPS2PWR1 Power Analysis User Manual 2- 4...
  • Page 30 Phase angle = 0 Voltage and current are in Voltage and current are in phase. phase. Unbalanced current typical of Unbalanced current typical of a an adjustable speed motor drive. switching power supply. TPS2PWR1 Power Analysis User Manual 2- 5...
  • Page 31 * amps in watts volts * amps in volt- - amps Power factor = cos Power angle between voltage and Reactive power = current volts * amps in volts- - amps- - reactive TPS2PWR1 Power Analysis User Manual 2- 6...
  • Page 32 Readjust the vertical scale or position or press the front-panel AUTOSET button. NOTE. All power application measurements require an installed TPS2PWR1 application key. TPS2PWR1 Power Analysis User Manual 2- 7...
  • Page 33 Power Analysis TPS2PWR1 Power Analysis User Manual 2- 8...
  • Page 34: Waveform Analysis

    This is useful in offices or manufacturing plants where the load on a particular branch may vary, affecting the quality of the power to the attached loads. The following figure shows example setups for measuring the crest factor for either voltage or current. TPS2PWR1 Power Analysis User Manual 2- 9...
  • Page 35 CAT III) or similarly rated passive high voltage probe or an appropriately rated high voltage differential probe when floating the common lead above 30 V , subject to the ratings of such high voltage probe. TPS2PWR1 Power Analysis User Manual 2- 10...
  • Page 36 The oscilloscope will display the source waveform and measurement values. These waveform analysis functions provide measurements to help you analyze individual waveforms. These operations require use of an individual voltage or current probe. TPS2PWR1 Power Analysis User Manual 2- 11...
  • Page 37 The voltage crest factor indirectly specifies the purity of the AC supply. The current crest factor indirectly specifies the ability of the load to draw high AC peak currents. Freq Displays the frequency (inverse of the period of the first complete cycle). TPS2PWR1 Power Analysis User Manual 2- 12...
  • Page 38 Crest factor > 1.41. Current spike. Typical of non- - linear loads such as switching power supplies. Crest factor < 1.41. Topped-out voltage wave. Typical of power supplies with non- - linear loads. TPS2PWR1 Power Analysis User Manual 2- 13...
  • Page 39 Waveform Analysis Operating Tips H Unlike some other menus in the TPS2PWR1 Power Application, the Waveform Analysis menu does not turn any channels on or off, or otherwise change your setup. H The following illustration further explains the values used in this menu.
  • Page 40: Phase Angles

    The figure below shows one way of hooking up the oscilloscope to measure the phase angles of voltage going into a motor’s variable speed drive. TPS2PWR1 Power Analysis User Manual 2- 15...
  • Page 41 CAT III) or similarly rated passive high voltage probe or an appropriately rated high voltage differential probe when floating the common lead above 30 V , subject to the ratings of such high voltage probe. TPS2PWR1 Power Analysis User Manual 2- 16...
  • Page 42 Simplify your measurements by using three voltage or current probes and a 4- - channel version of the TPS2000. You can also use a 2-channel instrument if you move your probes around to make the measurements. TPS2PWR1 Power Analysis User Manual 2- 17...
  • Page 43 It is negative if the lower-numbered channel’s waveform lags rather than leads. For example, the angle is positive if the CH1 waveform leads the CH2 waveform. The angle is negative if the CH1 waveform lags behind the CH2 waveform. TPS2PWR1 Power Analysis User Manual 2- 18...
  • Page 44 The figures below show stylized example results with a perfect 120 degrees separating each phase and with imperfect separations. Phase A Phase B Phase C CH1- - CH2 CH2- - CH3 CH3- - CH1 TPS2PWR1 Power Analysis User Manual 2- 19...
  • Page 45 Readjust the vertical scale or position or press the front-panel AUTOSET button. NOTE. All power application measurements require an installed TPS2PWR1 application key. TPS2PWR1 Power Analysis User Manual 2- 20...
  • Page 46: Harmonics

    CAT III) or similarly rated passive high voltage probe or an appropriately rated high voltage differential probe when floating the common lead above 30 V , subject to the ratings of such high voltage probe. TPS2PWR1 Power Analysis User Manual 2- 21...
  • Page 47 Harmonics Push the Harmonics button to bring up the Harmonics menu. The oscilloscope will display the frequency spectrum of the source waveform and the associated measurement values. TPS2PWR1 Power Analysis User Manual 2- 22...
  • Page 48 Doing a save will save the harmonics waveform and the underlying time domain waveform. You will typically view the contents of the harmonics .CSV file on a personal computer. You cannot recall the file to the oscilloscope. TPS2PWR1 Power Analysis User Manual 2- 23...
  • Page 49 H Adjusts the trigger level to mid-level of the source channel signal. H Adjusts the horizontal scale to capture three to five cycles of the source channel. H Sets the acquisition mode to average, with 16 waveforms per average. TPS2PWR1 Power Analysis User Manual 2- 24...
  • Page 50 TPS2PWR1 Power Analysis User Manual 2- 25...
  • Page 51 H Manual Setup: If you choose to manually set up your waveform for the harmonics functions, the oscilloscope will not return to your prior setup when exiting the harmonics menu. TPS2PWR1 Power Analysis User Manual 2- 26...
  • Page 52 Readjust the vertical scale or press the front-panel AUTOSET button. NOTE. All power application measurements require an installed TPS2PWR1 application key. TPS2PWR1 Power Analysis User Manual 2- 27...
  • Page 53 6 rectifiers. V(RMS) = 120 V THD = 135% Odd-ordered harmonics (3rd, 5th, 7th, 9th, 11th, and 13th) for the voltage from a switched power supply. V(RMS) = 120 V THD = 90% TPS2PWR1 Power Analysis User Manual 2- 28...
  • Page 54: Switching Loss

    CAT III) or similarly rated passive high voltage probe or an appropriately rated high voltage differential probe when floating the common lead above 30 V , subject to the ratings of such high voltage probe. TPS2PWR1 Power Analysis User Manual 2- 29...
  • Page 55 Switching Loss WARNING. To avoid an electric shock, do not use probes that require a ground connection, such as the Tektronix P5200 High Voltage Differential Probe, with the TPS2000 series oscilloscopes. The P5200 High Voltage Differential Probe requires an oscilloscope with grounded inputs and the TPS2000 series oscilloscopes have floating inputs (isolated inputs).
  • Page 56 Push to instruct the oscilloscope to use default levels for Levels determining the turn-on, conduction, and turn-off regions. Save Meas Push to save the switching loss measurements to a CSV file on a CompactFlash card. TPS2PWR1 Power Analysis User Manual 2- 31...
  • Page 57 10% default Turn-off End Push this button and use the multipurpose knob to move the cursor to select a current waveform edge percentage level other than the 10% default TPS2PWR1 Power Analysis User Manual 2- 32...
  • Page 58 Choose whether to display the measurement results in watts or joules. You might choose watts to determine how much power is being used by the device-under-test and joules to compare the device to its specification. TPS2PWR1 Power Analysis User Manual 2- 33...
  • Page 59 The algorithm uses the user-entered saturation voltage, rather than the voltage waveform, because the level of the voltage waveform is usually too small to measure during conduction. Total Loss Displays the sum of the turn-on, turn-off, and conduction losses. TPS2PWR1 Power Analysis User Manual 2- 34...
  • Page 60 H The following illustration further explains the values used in this menu. Turn- - off start Turn- - on start Turn- - off stop Turn- - on stop VA Math Saturation Turn- - on Conduction Turn- - off voltage region region region TPS2PWR1 Power Analysis User Manual 2- 35...
  • Page 61 Volt- - Amp- - second. By default, the losses are reported in watts. You can choose to have them reported in joules. The watts value is calculated by multiplying the joules value by the trigger frequency, which is assumed to be the switching frequency. TPS2PWR1 Power Analysis User Manual 2- 36...
  • Page 62 9. Adjust channel 1, channel 2, and math vertical scale and vertical position so that each waveform amplitude is more than two divisions, but is not clipped. TPS2PWR1 Power Analysis User Manual 2- 37...
  • Page 63 Next, zoom and pan to the turn-off region and measure the turn-off loss. Finally, change the setup to display the full cycle and measure the conduction loss. TPS2PWR1 Power Analysis User Manual 2- 38...
  • Page 64 To examine the results from individual acquisitions, go to page 1 of the switching loss menu and push the Save Meas button. This saves the detailed data to a .CSV file on a Compact- Flash card. TPS2PWR1 Power Analysis User Manual 2- 39...
  • Page 65 Readjust the vertical scale or position or press the front-panel AUTOSET button. NOTE. All power application measurements require an installed TPS2PWR1 application key. TPS2PWR1 Power Analysis User Manual 2- 40...
  • Page 66: Dy/Dt Measurements

    CAT III) or similarly rated passive high voltage probe or an appropriately rated high voltage differential probe when floating the common lead above 30 V , subject to the ratings of such high voltage probe. TPS2PWR1 Power Analysis User Manual 2- 41...
  • Page 67 Adjust the cursors to vary the portion of the waveform over which to measure. The dY/dt measurements are only available when the power application key is installed. TPS2PWR1 Power Analysis User Manual 2- 42...
  • Page 68: P5120 Specifications

    (Tables 2- - 2 and 2- - 3) and are provided as general information for your convenience. The specifications apply to a P5120 probe installed on a Tektronix TPS2000 series oscilloscope. The instrument must have a warm-up period of at least 20 minutes and be in an environment that does not exceed the limits described in Table 2- - 4.
  • Page 69 Category I & II 600 V Category III 300 V 100 V 10 V Frequency (Hz) Figure 2- 1: Maximum voltage derating curves (V , DC coupled), probe tip to reference or earth ground TPS2PWR1 Power Analysis User Manual 2- 44...
  • Page 70 1,000 V 600 V Category I & II 300 V Category III 100 V 10 V Frequency (Hz) Figure 2- 2: Maximum voltage derating curves (V , DC coupled), probe reference to earth ground TPS2PWR1 Power Analysis User Manual 2- 45...
  • Page 71 Checked at 1 MHz P5120 Impedance 10 MΩ 5 MΩ 1 MΩ 100 kΩ 10 kΩ 1 kΩ 100 Ω 10 Ω 1 Ω Frequency (Hz) Figure 2- 3: Typical input impedance TPS2PWR1 Power Analysis User Manual 2- 46...
  • Page 72 - - 20 - - 30 - - 40 - - 50 - - 60 - - 70 - - 80 - - 90 - - 100 Frequency (Hz) Figure 2- 4: Typical input phase TPS2PWR1 Power Analysis User Manual 2- 47...
  • Page 73 60% RH Low: 0 °C to 30 °C (32 °F to 86 °F), ≤ 90% RH Transportation Tektronix Standard 062-0937-00 Revision C Altitude Operating: 4,600 m (15,092 ft) Nonoperating: 12,192 m (40,000 ft) TPS2PWR1 Power Analysis User Manual 2- 48...

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