Atlas ESR User Guide
Contents
1. limit ov BEEE imensi o Inactivity power down period 3 seconds f Dimensions excluding test leads 103 x 70 x 20 mm Operating temperature range Notes 1 2 Battery voltage warning threshold 85v Subject to acceptable LCD visibility Subject to revision 3 Maximum abuse voltage rated limitation of internal protection electronics Probes leads and unit are not certified for high voltage use Page 12 Atlas ESR User Guide February 2008 Rev 4 Appendix C Warranty Information Peak Satisfaction Guarantee If for any reason you are not completely satisfied with the Peak Atlas ESR within 14 days of purchase you may return the unit to your distributor You will receive a refund covering the full purchase price if the unit is returned in perfect condition Peak Warranty The warranty is valid for 12 months from date of purchase This warranty covers the cost of repair or replacement due to defects in materials and or manufacturing faults The warranty does not cover malfunction or defects caused by a Operation outside the scope of the user guide b Unauthorised access or modification of the unit except for battery replacement c Accidental physical damage or abuse The customer s statutory rights are not affected by any of the above All claims must be accompanied by a proof of purchase Page 13 Atlas ESR User Guide February 2008 Rev 4 Appendix D Disposal Information WE2. Atlas ESR Capacitance and Equivalent Series Resistance Meter Model ESR60 Enhanced Peak Electronic Design Limited 2004 2008 In the interests of development information in this guide is subject to change without notice E amp OE ce PEK electronic design Itd Atlas ESR User Guide February 2008 Rev 4 Want to use it now We understand that you want to use your Atlas ESR right now The unit is ready to go and you should have little need to refer to this user guide but please make sure that you do at least take a look at the notices on page 4 Contents Page PO CUIOU OT rereana atiadasboinnders 3 Safety Consideration g pas eroien ni aia AEE E 4 NOSOBE S Rerierten eg E 5 Analysing CAPACI OES fc se cxccsieccostesseceseatgedeiertexvteeleaioeisexe 6 7 Typical valies or POR ih icca csi tiaras caida ba ead cuales 8 Probe Compensation sad earned ential dsl a li 9 Care OF your A aS ESR ices icseadad ak eases sald tial aneeueas cakes 10 Appendix A Troubleshooting cccccceeeeeeeeeeeeeeees 11 Appendix B Technical Specifications IZ Appendix C Warranty Information cccccceeeeeeees 13 Appendix D Disposal Information cece 14 Page 2 Atlas ESR User Guide February 2008 Rev 4 Introduction The Atlas ESR is an advanced instrument designed specifically for the analysis of capacitor equivalent series resistance in or out of circuit In addition it will where possibl
3. EE Waste of Electrical and Electronic Equipment Recycling of Electrical and Electronic Products United Kingdom In 2006 the European Union introduced regulations WEEE for the collection and recycling of all waste electrical and electronic equipment It is no longer permissible to simply throw away electrical and electronic equipment Instead these products must enter the recycling process Each individual EU member state has implemented the WEEE regulations into national law in slightly different ways Please follow your national law when you want to dispose of any electrical or electronic products More details can be obtained from your national WEEE recycling agency If in doubt you may send your Peak Product to us for safe and environmentally responsible disposal At Peak Electronic Design Ltd we are committed to continual product development and improvement The specifications of our products are therefore subject to change without notice 2004 2008 Peak Electronic Design Limited E amp OE West Road House West Road Buxton Derbyshire SK17 6HF UK www peakelec co uk Tel 44 0 1298 70012 Fax 44 0 1298 70046 Page 14
4. e display the capacitance of the device under test Summary Features ESR measurement range 0 to 200 e ESR resolution as low as 0 01Q e Capacitance range luF 22mF 22 000uF e Can be used for low ohms resistance checking too e Built in protection circuitry means risk of damage to the unit due to residual charge is greatly reduced e Integrated controlled discharge circuitry reduces the need for the user to manually discharge capacitors before test e Use in or out of circuit for ESR measurement e Automatic and manual power off Note The discharge circuitry exists to ensure that a charged capacitor is less likely to damage the unit For example if the capacitor under test has a potential of a few tens of volts across it the charge is removed automatically It is the user s responsibility to ensure that any dangerously charged capacitors are safely discharged before connection to the unit Page 3 Atlas ESR User Guide February 2008 Rev 4 Safety Considerations WARNING This instrument must NEVER be connected to powered equipment components It is the user s responsibility to ensure that any dangerously charged capacitors are safely discharged before connection to the unit To allow the self protection mechanism to function always ensure that the Atlas ESR has completed any analysis before connecting the test probes to a component Failure to comply with these warnings may result in personal
5. elow ESR Value Automatically Displayed selected test current oora Although the measurement resolution is generally determined by the absolute value of the ESR as shown in the above table low capacitance values can result in a poorer ESR measurement resolution Page 7 Atlas ESR User Guide February 2008 Rev 4 Typical Values of ESR It is not possible to provide a definitive rule for values of ESR that are acceptable for all situations The expected value of ESR largely depends on the capacitance value and the voltage rating of the capacitor but also depends on temperature ratings and other factors Some capacitors are manufactured to exhibit very low ESR values whilst conventional low cost parts are likely to exhibit higher values but still be acceptable As a rough guide only the following table shows typical values of ESR for a range of different capacitance and voltage ratings 10V 16V 25V 35V 63V 160V 250V A gt 200 OM 2 0 00 22uF 47 uF 100nF 220uF 470uF 1000uF E 0 090 PRA 0 040 A 0 020 Please note that the above figures are only typical figures for standard grade electrolytics at room temperature please verify readings against expected values for the particular type of capacitor you are testing Page 8 Atlas ESR User Guide February 2008 Rev 4 Probe Compensation To ensure good repeatable readings particularly for low values of ESR it may be necessary to occas
6. in protection circuit is ready for any charge that may be present on the capacitor The Atlas ESR will start component Measuri ng analysis when the on test button is pressed Capacitance The analysis typically takes under 10 seconds to complete depending on the characteristics of the capacitor If the capacitor is charged lt 50V the Atlas ESR will attempt to discharge the Discharging capacitor while showing the progress Ca pac itor V 23V of the procedure If the Atlas ESR cannot recognise the Open c ircuit or component connected to the test probes or the capacitance is out of ow Ca patl tance range one the following messages may be displayed Capacitor value too high Page 6 Atlas ESR User Guide February 2008 Rev 4 Analysing Capacitors continued Once a valid ESR reading has been obtained the results are displayed If the presence of external circuitry did not adversely affect the capacitance 476 6 u F measurement the capacitor value will 0 21 also be shown If the capacitance could not be In Circuit determined the display will only show ESR 0 21 the value of ESR measured In the event that ESR exceeds the maximum that can be measured the display may show 476 6uF In Circuit gt 20 0 ESR gt 20 0 The ESR measurement range is automatically determined during the analysis Typically the resolution for ESR measurement is as shown in the table b
7. injury damage to the equipment under test damage to the Atlas ESR and invalidation of the manufacturer s warranty Page 4 Atlas ESR User Guide February 2008 Rev 4 Notes on ESR ESR ESR Equivalent Series Resistance as it s acronym implies is the value of resistance that is effectively in series with an ideal capacitor No capacitor is ideal of course the detailed equivalent circuit of a typical capacitor is very complex For many electrolytic capacitors however the most important parameters regarding the capacitor s performance is the capacitance and the ESR An increase in ESR due to age abuse or temperature cycling can result in poor capacitor performance The capacitor becomes less ideal and starts to dissipate more power an ideal capacitor of course dissipates zero power Capacitor manufacturers typically quote the ESR of their products at 100kHz which is the same test frequency used by the Atlas ESR Page 5 Atlas ESR User Guide February 2008 Rev 4 Analysing Capacitors The Peak Atlas ESR is designed to analyse capacitor ESR in or out of circuit The two test probes can be connected to the component any way around Remember though that in circuit testing can result in less accurate readings Important To minimise risk of damage to the unit make sure that the Atlas ESR has completed any previous analysis before attaching the test probes to the capacitor This ensures that the built
8. ionally perform a simple Probe Compensation procedure 1 Ensure the unit is switched off 2 Press and hold down the on test button for about 4 Probe seconds until the following Co mpensa tion message is displayed 3 The unit will then ask you to short the probes together by Short pro bes interlocking the jaws of each and press TEST croc clip Then press the on test button 4 After a short delay the display will confirm that the OK procedure is complete and then switch off If the following message is displayed then the probes may not have been Co mpens atl on correctly shorted during the above Fail Tr y aga In proecedure This message may also be displayed if any of the probe connections are faulty Page 9 Atlas ESR User Guide February 2008 Rev 4 Care of your Atlas ESR The Peak Atlas ESR should provide many years of service if used in accordance with this user guide Care should be taken not to expose your unit to excessive heat shock or moisture Additionally the battery should be replaced at least every 12 months to reduce the risk of leak damage Warnin kx If a low battery warning message 9 appears replacement of the battery is Low Battery izi essential Immediate replacement of the battery is EXTREMELY IMPORTANT as the built in protection mechanism may not function correctly if the battery condition is poor and therefore render your unit susceptible to damage from even low ene
9. rgy charged capacitors The Atlas ESR will not continue to operate if a low battery condition is encountered New batteries can be purchased from many retailers and directly from Peak Electronic Design Ltd or an authorised agent Battery types Suitable battery types include 23A V23A GP23A MN21 or a good quality 12V alkaline equivalent as used in many test instruments and automotive remote key fobs Battery access To replace the battery unscrew the three screws to remove the rear panel Remove the old battery and insert a new one taking care to observe the correct polarity Carefully replace the rear panel do not over tighten the screws Peak Safe Battery Disposal Scheme Please return your old analyser battery to Peak Electronic Design Ltd for safe and environmentally responsible disposal Page 10 Atlas ESR User Guide February 2008 Rev 4 Appendix A Troubleshooting Problem ESR value when probes are shorted is not close to 0Q Seems to be stuck Measuring capacitance Display shows Removing trace charge Display shows Auto discharge taking too long Display shows Warning V 132V Safely discharge Display shows Self Test Fail Code 2 Cause Possible Solution Perform a probe compensation It is possible that one or more of the 4 wire probe connections has become broken Check all connections This message is displayed if the Atlas ESR has detected that the attached capacitor may be e
10. xhibiting Soakage or Dielectric Absorption this is quite normal The instrument then ensures that the capacitor is very well discharged and helps to prevent voltage developing across the capacitor after the normal discharge procedure has completed The unit attempts to remove charge from the capacitor using a controlled discharge procedure If this takes longer than 60 seconds then the discharge process will be aborted It is recommend that you safely discharge the capacitor manually and try analysis again If the voltage across the capacitor is greater than 50V then the Atlas ESR will not attempt to discharge the capacitor please safely discharge the capacitor manually It is possible that a hardware failure has occurred please contact Peak Electronic Design Limited for assistance Page 11 Atlas ESR User Guide February 2008 Rev 4 Appendix B Technical Specifications All values are at 25 C unless otherwise specified Parameter Min Typ Max Note Peak testcurrentintoS C_ 20mA 25mA Peak test voltage across O C 25v 3 0v Capacitance measurement range lF 22 000uF 4 0 2pF as ESR measurement range Q 200 ESR resolution for ESR lt 2Q 0 010 009 ESR resolutionforESR gt 2Q oige 02 ESRaccuracyforESR lt 2Q 0 1 5 40 020 1 5 40 20 Abuse voltage forC lt 10uF asv 3 Abuse voltage for C gt 104 sov 3 Auto Discharge voltage
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