Making Fluorescent Lamp Ballast Measurements with The Tektronix
Contents
1. m Press Menu to return to the measurement display The PA1000 will now display the Inout Watts Vrms Arms PF Freq 4 4 2 Set the PA1000 into BALLAST MODE To make accurate measurements on the ballast waveform the ballast mode should be selected This is done as follows m Press menu gt Modes gt Select Mode check mark Ballast as shown in Figure 16 m Press Menu to return to the measurement display 12 zx 998 EZE 2 445 a 3 CETE __ Figure 17 Example of Ballast output result display Window The measurement window should now display Ballast in the bottom right hand corner of the display The PA1000 is now configured to measure the Watts Arms Vrms power factor and frequency of the output of the lighting ballast see Figure 17 Apply power to the Ballast and view the measurements required www tektronix com 11 Application Note Ballast input setup USB cable Breakout Box Ballast Figure 18 An example of two PA1000 set up via PWRVIEW 5 Making Ballast Measurement of Lamp Ballast with two PA1000 and PWRVIEW PWRVIEW Software also allows user to synchronize two PA1000 for making simultaneous input and output of Lamp Ballast measurement One PA1000 is connected to the ballast input using a Breakout Box and the other is connected to the ballast output using a Ballast CT the connections are shown in Figure 18 m Open PWRVIEW and click on ADD button and then click on connect as sh2. ronnect your instruments Nready adoed Already adced Consel Connect Making Fluorescent Lamp Ballast Measurements with The Tektronix PA1000 Power Analyzer Application Note Tektronix Application Note 1 Introduction An electronic ballast is a power conversion device that is an essential part of today s energy efficient lighting systems An electronic ballast converts the normal AC line voltage and frequency at its input into a modulated high frequency output suitable for the fluorescent lamp During startup of the lamp the ballast must briefly supply high voltage to establish an arc between the two lamp electrodes Once the arc is established the ballast quickly reduces the voltage and regulates the electric current to produce a steady light output Without a ballast to limit its current a fluorescent lamp connected directly to an uncontrolled high voltage power source would rapidly and uncontrollably increase its current draw The advantages of high frequency electronic ballast over older line frequency types are that m The fluorescent tube converts electrical energy into light much more efficiently at high frequencies than at line frequencies of 50 or 6OHZz Typical ballast frequencies are in the range 40kKHz to 150 kHz m When regulating the current the excess voltage is dropped across the leakage inductance of the ballast with minimal Watts loss as compared to the copper losses of convent
3. current EE What it your Meera expected angot peni nert lt the halep tor tube ath a teers en LES ont sshewen Rea Figure 14 Ballast Wizard setting Window 4 3 PWRVIEW Software Set up for Ballast Output Measurement m Start PWRVIEW and connect to the PA1000 as described in Section 2 1 m Select Ballast output in the Default Applications then click on the Wizard button to set up the Ballast test m Follow the Wizard set up instructions as shown in Figure 14 m Click on Measure and Start to capture all the measured parameters values as shown in Figure 15 10 www tektronix com a O_o U 3 Ss f Electronic Ballast Output Wizard Peewee connect your Power Anstyzer at town below Connect Power Analyzer 6 pots where nhcated wth Wang lettexfom Al Preece see wa breterral LA thot npt aen Tae O E i i i E B a il l Biggi i I C a HLN P v a iii J Eo eta TA 1 7 T j j rme FERA ly ia 4 reg AFA Ln man E Figure 15 Example of Ballast result display Window Making Fluorescent Lamp Ballast Measurements with The Tektronix PA1000 Power Analyzer Select Mode Normal Ballast Inrush Standby Power Integrator Figure 16 Ballast Select Mode Window 4 4 Ballast Output Measurements Using the Front Panel 4 4 1 Return the Instrument to the Default configuration m Press Menu select USER CONFIGURATION and then select Load Default
4. 5 USA 1 800 833 9200 If the European phone number above is not accessible please call 41 52 675 3777 Contact List Updated June 2013 For Further Information Tektronix maintains a comprehensive constantly expanding collection of application notes technical briefs and other resources to help engineers working on the cutting edge of technology Please visit www tektronix com eH Copyright 2013 Tektronix All rights reserved Tektronix products are covered by U S and foreign patents issued and pending Information in this publication supersedes that in all previously published material Specification and price change privileges reserved TEKTRONIX and TEK are registered trademarks of Tektronix Inc All other trade names referenced are the service marks trademarks or registered trademarks of their respective companies 11 138 EAAWWW SSW 29621 0
5. R Ballast Input Wizard leane Pome Arya beeture d y esated Sohn AA foe Pea easy awd Iy f thw A wer gt be memes edd ony awe Popas eet Figure 5 Ballast Setting Wizard Window m Enter the anticipated peak input current and click on Next as shown in Figure 5 The following screen will show you how to make connections between the ballast input and the power analyzer These connections are simplified by the use of the Breakout Box m Clicking on Finish will return you to the set up window and ready to do the measurement There is no need to click Apply since the wizard will have already made the changes to the configuration m The wizard will have chosen a default set of measurements that are typically required when measuring the input power of ballast Changes to the measurements returned can be made on the Settings tab m When you are ready to start making measurements click on the Measure Tab PWRVIEW will display the measurement grid m Click on the start button to begin the measurement The requested unit configuration will be sent to the PA1000 Once the PA1000 has been configured the measurement grid will start to update at approximately twice per second as shown in Figure 5 6 www tektronix com Er ire Vrau Teu Pandhe G j Sapnas s Wd 00 EO A Aen sping Asto New Vet Emst Smg Record Osis fra faing Mea mort watts ra wp Ule Zz wth al het Figure 6 Measurement Gr
6. eakout Box as shown in Figure 2 Breakout Box Ballast Figure 2 Hardware Setup for Ballast Input Measurement Making Fluorescent Lamp Ballast Measurements with The Tektronix PA1000 Power Analyzer ki ee we B Weer Test Rerits u PARLER Saet Aad Semove Serii Newnort E 408 Ar hme Tre Tektronix Einin ai aa tet my Figure 3 Add an Instrument 3 2 Using PWRVIEW Software for Ballast Input Measurements m Download the current version of PWRVIEW Software from www tek com m Install PWRVIEW on the PC connected to the PA1000 Open the PWRVIEW software Select ADD to add an instrument A list of available instruments will be shown select the connected PA1000 then click connect See Figure 3 Default Applications 4 General AC Power 4 LED Inverter Input Inverter Output Inverter Efficiency Ballast Ballast Output Ballast Efficiency Standby Measurements Low Power Standby Full Compliance Standby PWM Drive PWM Drive Output PWM Drive Efficiency Energy Measurements Energy Consumption Figure 4 Ballast Setting Window m Select Ballast Inout in the Default Applications list 9see Figure 4 then click on the Wizard button to set up the ballast test m Follow the Wizard setup instruction in the main screen window The Wizard will guide you through ballast parameter setup and how to make connection between PA1000 and ballast undet test See Figure 4 www tektronix com 5 Application Note Twr 7 a
7. er analyzer using either front panel operation or with Tektronix PWRVIEW software m Section 3 Making simultaneous Measurements of the input and output of a ballast including efficiency using two PA1000s with PWRVIEW software m Section 4 Recording measurements using the PA1000 and PWRVIEW www tektronix com 3 Application Note PA1000 Ballast Mode Test Set Up Equipment Required m PA1000 Breakout box Part numbers BB1000 NA BB1000 EU BB1000 Uk m NA North American socket EU European Union Shuko Style socket UK British style socket m Ballast Current Transformer Part number BALLAST CT m Ballast and lamp to be tested Abbreviated DUT Device under Test m PWRVIEW Software installed on a Windows PC m Standard Tektronix 4mm Lead Set m USB Peripheral Cable Note This document assumes a USB connection between PA1000 and PWRVIEW Ethernet or GPIB also can be used for communication between PA1000 and PWRVIEW 3 Making Inout Measurements on a lamp ballast with the PA1000 power analyzer using either front panel operation or with Tektronix PWRVIEW software Parameters of interest are Voltage Current Watts Power Factor Current Harmonics and Current Total Harmonic Distortion 3 1 Connecting the ballast to the PA1000 m Connect the PA1000 and Breakout Box as shown in Figure 2 Connect the PA1000 to the PC using the USB cable m Power on the DUT 4 www tektronix com Plug the DUT into the Br
8. ge the number of result displayed m Press Menu scroll down the main menu and select VIEW m Press MENU to return to the measurement display screen select ZOOM select either 4 or 14 results as shown in shown in Figure 10 m Repeat the process for any of the other measurements you E TESS MENU TO TEUING Ine meastirement aisplay wish to view To view harmonic results you will need to add the Volts and Amps harmonics meausrements using the method detailed above Once the results have been added you can view the numerical values in the normal results window or you can view the amplitudes on a barchart To view he barchart Graph key on the keyboard An example of a harmonic barchart is shown in Figure 11 8 www tektronix com Making Fluorescent Lamp Ballast Measurements with The Tektronix PA1000 Power Analyzer Figure 12 Typically 50k Hz to 150k Hz partially modulated at the power frequency 4 Ballast Making Output Measurements on a lamp ballast with the PA1000 power analyzer using either front panel operation or with Tektronix PWRVIEW software The output voltage waveform of electronic ballast consists of a carrier with a frequency of typically 50KHz to 150kHZz or higher partially modulated at the power frequency typically 50 60 or 400HZ Figure 12 shows a typical ballast waveform The PA1000 is equipped with a special operating mode specifically for ballasts or modulated ultrasonic applications both of which have sim
9. iciency while maintaining the flexibility of two single phase analyzers For further support please contact Tektronix technical support or at www tek com 3 References 1 PA1000 User Manual www tek com 2 PA1000 Accessary Brochure www tek com 3 PWRVIEW SW www tek com www tektronix com 15 Contact Tektronix ASEAN Australia 65 6356 3900 Austria 00800 2255 4835 Balkans Israel South Africa and other ISE Countries 41 52 675 3777 Belgium 00800 2255 4835 Brazil 55 11 3759 7627 Canada 1 800 833 9200 Central East Europe and the Baltics 41 52 675 3777 Central Europe amp Greece 41 52 675 3777 Denmark 45 80 88 1401 Finland 41 52 675 3777 France 00800 2255 4835 Germany 00800 2255 4835 Hong Kong 400 820 5835 lreland 00800 2255 4835 India 91 80 30792600 Italy 00800 2255 4835 Japan 0120 441 046 Luxembourg 41 52 675 3777 Macau 400 820 5835 Mongolia 400 820 5835 Mexico Central South America amp Caribbean 52 55 56 04 50 90 Middle East Asia and North Africa 41 52 675 3777 The Netherlands 00800 2255 4835 Norway 800 16098 People s Republic of China 400 820 5835 Poland 41 52 675 3777 Portugal 80 08 12370 Puerto Rico 1 800 833 9200 Republic of Korea 822 691 7 5000 Russia 7 495 664 75 64 Singapore 65 6356 3900 South Africa 27 11 206 8360 Spain 00800 2255 4835 Sweden 00800 2255 4835 Switzerland 00800 2255 4835 Taiwan 886 2 2656 6688 United Kingdom 00800 2255 483
10. id a eee gt i i i i A i Figure 7 Harmonic barchart m The results can also be viewed in a graphical form To display charts and graphs click on the Graphs tab From there select either Harmonic or Waveforms to view data in a graphical format An example of a bar chart is shown in Figure 7 Making Fluorescent Lamp Ballast Measurements with The Tektronix PA1000 Power Analyzer select Mode Normal Ballast Inrush standby Power Integrator Figure 8 Select Mode Window Figure 9 Select Athd parameter Window 3 3 Ballast Input Measurements Using the 3 3 2 Adding Additional Measurements Front Panel m Selecting a mode will apply a default set of measurements 3 3 1 Setting the PA1000 Mode To add agonal measurements such as Amps THD do the following m Press menu gt Modes gt Select Mode check mark Press Menu select MEASUREMENTS Normal as shown in Figure 8 Note that normal is selected because input power from AC source to Ballast is measured m Scroll down the measurement menu using the down scroll key and select the required measurement Athd in this example as shown in Figure 9 www tektronix com 7 Application Note Ang 1 2 E Overse ale Figure 10 An example of additional results Figure 11 Harmonic bar chart m Press OK The PA1000 ZOOM function allows user to display either 4 or Athd will now appear in the measurement result screen 14 measurements To chan
11. ilar waveforms This mode locks the measurement to the 50 60 or 400HZ line frequency whilst performing analysis at the actual carrier frequency of 25kHz to 1MHz Interested measured parameters are Voltage Amps Watts Frequency and Power Factor 4 1 The Tektronix Ballast CT Box The Ballast CT is a precision in high bandwidth current transformer which is to use the current in high frequency lighting ballasts the Ballast CT provides m Isolation of the current signal from common mode voltages improving the overall accuracy m For tubes with heaters the two inputs act to provide the difference between the two currents at the output to the power analyzer The Ballast CT is closely coupled high frequency differential transformer The resultant output is the current in the tube In this way the Ballast CT simplifies the connection to tubes with heaters Tube j BALLAST TUBE Ballast CT Ballast Figure 13 An example of Hardware Set up for Ballast Output Measurement 4 2 Ballast Output Measurement 4 2 1 Connecting the Ballast Output to the PA1000 m Connect the DUT Ballast CT and PA1000 as shown in Figure 13 m Connect the PA1000 USB port to a PC running PWRVIEW www tektronix com 9 Application Note ap Electronic Ballast Output Wizard The Dahan CT timg ties the mepeuremert Of tote current n high frequency electrom lt ightag ballasts by solsbag Corres mode sericieey wollages and separating beater
12. ional ballast 2 www tektronix com Electronic ballasts are commonplace reliable and efficient This application note will focus on measurements of ballasts driving fluorescent tubes Ballast technology is used in many different lamp types including m Electrodeless fluorescent lamps m LED Lighting Fluorescent high efficiency HID lamp with ballast Making Fluorescent Lamp Ballast Measurements with The Tektronix PA1000 Power Analyzer 2 Measurement Challenges Measuring the efficiency and electrical characteristics of electronic ballasts is not straightforward Several challenges should be considered and suitable measurement techniques employed 2 1 Input measurements As well as measurements of power in Watts at the ballast input international regulations such as IEC61000 3 2 seek to limit the level of distortion of the current drawn Current harmonics and power factor are thus required input measurements The current drawn by the ballast will not be sinusoidal but is distorted by the input rectifiers and storage capacitors of the ballast The current may be artificially corrected by power factor correction circuits but even then it is important to confirm the correct and efficient operation of any power factor correction There may also be high frequency current present at the ballast inout which can artificially influence the power factor The power analyzer must m Measure power and power factor accurately on disto
13. nt methods for recording data for later analysis 1 The Record button in PWRVIEW enables the user to record each sample set of measured data continuously over a period of time onto a PC for later analysis The data is recorded directly to an SQL database The data can be recalled and exported to an Excel file by clicking on the Data button 2 The Snapshot button in PWRVIEW allows the user to instantly capture the data shown in the measurement screen 14 www tektronix com Click on Data to export datalog out to excel Making Fluorescent Lamp Ballast Measurements with The Tektronix PA1000 Power Analyzer 7 Conclusion In today s modern ballasts the need for more accurate answers is greater than ever due to the need to improve efficiency Higher efficiency ballasts require higher accuracy measurements and detailed consideration of the measurement challenges that can affect results A power analyzer must have Power measurement accuracy sufficient to determine the required efficiency High bandwidth for both input and output measurements Ability to accept high input current crest factors without user intervention nor degradation of measurement accuracy Ability to measure harmonics and THD at the input and output of ballasts Built in ballast mode to enable accurate and stable measurements at the ballast output When combined with the PWRVIEW software two PA1000s offer a cost effective method for determining ballast eff
14. own in Figure 19 This time select two instruments Oo setup the instrument connected to the ballast input first select the tab of PA1000 connected to the ballast input The tab contains the last 5 digits of the serial number of the instrument it is associated with to help link it to the instrument Next follow the PWRVIEW Wizard as described in Section 1 2 12 www tektronix com Ballast output setup USB cable Tube Bad eal r Ballast CT Ballast Add An Instrument e ve amp Please connect your imstruments Tektronix A Cancel Connect Figure 19 Example of two PA1000s Connected via PWRVIEW m o setup the instrument connected to the ballast output first seclect the tab of the PA1000 connected to the ballast output and then follow the Wizard as described in Section 2 3 Note There are a number advantages of using two PA1000s with PWRVIEW for ballast testing Making Fluorescent Lamp Ballast Measurements with The Tektronix PA1000 Power Analyzer 1593629 Mess aements rates Meee 3 wee 4 4 M da y Tira Laa CUOR i no letVietorey EIEI i velis 92 15 9 f Pe i H 69 90 w LAS 6 Ytd o n 2s s i Mba i vige su IR Figure 20A B An example of making ballast with two PA1000s via PWRVIEW m PWRVIEW enables user to display both the ballast input and output measurements on a PC simultaneously m PWRVIEW allows the user to enter equations for calc
15. rted waveforms m Measure current harmonics m Have high bandwidth several times higher than the ballast switching frequency to avoid filtering the high frequency current components caused by the output switching frequency which are drawn on the input to the ballast Figure 1 Modulated ballast output waveform The ballast output has the following characteristics m The frequency is high 40kHz 150kKHz or more and the measuring instrument must measure accurately at this frequency m Iwo frequencies are present and for accurate measurements the frequency used to calculate power must be the low or line frequency so that complete cycles of the waveform are captured m Total Harmonic Distortion THD of the high frequency waveform must be controlled to guarantee long life of the lamp The analyzer must measure high frequency harmonics while simultaneously measuring the power at the line frequency of the ballast input Only once these measurement challenges have been considered and acknowledged can accurate power and efficiency measurements be made The objective of this application note is to show how to set up fluorescent lamp ballast testing There are four tutorial sections as follows m Section 1 Making Inout Measurements on a lamp ballast with the PA1000 power analyzer using either front panel operation or with Tektronix PWRVIEW software m Section 2 Making Output Measurements on a lamp ballast with the PA1000 pow
16. ulation as required Figures 20A and B show how to enter an equation to calculate the efficiency of the ballast based on the input and output power 6 Recording data with the PA1000 and PWRVIEW Both PWRVIEW and the PA1000 offer convenient methods for recording results for further analysis 6 1 Recording data to a USB memory device m To log data to a USB memory device plug it in to the front panel USB port The Normal Label on the right corner of the display screen will momentarily change to USB RDY to indicate that the PA1000 is ready to start recording data Refer to Figure 21 Press the LOG button to enable datalog Press the LOG button again to stop datalog rFAtou gt o eee ee292 o eense a oN nee OCA 22 as Insert USB Drive into USB port Figure 21 Datalog from PA10006 www tektronix com 13 Application Note Click on Record for continuous Click on SnapShotto take a screen data logging Measurement data for later analysis Measure Test Results 7 j O O Significant Figures 5 w Averaging Auto i Start a Stop Reset SnapShot Record Data Settings Measurements Display Data Logging A PA1000 0001 1 230 00 V S a OO Erea 49 9902 y vain 29 997 0 0000 a 124 96 is_jvasm 79 889 TT CCCs tins 106 45 J S o o A u uA Figure 22 PWRVIEW Datalog options 6 2 Recording Data in PWRVEW PWRVIEW provides 2 differe
Download Pdf Manuals
Related Search