Bulk Current Injection Probes - ETS
Contents
1. For the steps to return a system or system component to ETS Lindgren for service see the Product Information Bulletin included with your shipment 11 This page intentionally left blank 12 3 0 Specifications Physical Specifications Window Diameter 4 0 cm 1 57 in Outside Diameter 13 0 cm 5 11 in At Widest Point 10 2 cm 4 01 in Height 6 0 cm 2 36 in Weight 1 60 kg 3 52 Ib Output Connector Type N Input Impedance 500 4 0 cm 10 2 cm 13 Electrical Specifications 95236 1 95242 1 Frequency Range 1 MHz 100 MHz 10 MHz 400 MHz Maximum Input Ai 100 w 200 w Power Maximum Input hae ha 20 Amperes 60 Amperes Current Maximum Core A 80 C 80 C Temperature Recommended Maximum 35 C 35 C Temperature Rise Maximum Time for Continuous Rating at 30 minutes 30 minutes Full Power Turns Ratio 1 2 11 Inductance 47 uH 20 0 8 uH 20 14 95236 1 The power limit of the 95236 1 is 100 W Powers in excess of 75 W should be used with care to avoid excessive temperature in the equipment under test Prolonged testing should be avoided particularly if unattended 95242 1 The power limit of the 95242 1 is 200 W Powers in excess of 100 W should be used with care to avoid excessive temperature in the equipment under test Prolonged testing should be avoided particularly if un2. Supporting Equipment Contact ETS Lindgren for sizes and sensitivities of other current probes When using the Model 95242 1 to perform susceptibility tests the following equipment may be required OPTIONAL INJECTION PROBE The Model 93686 1 Current Probe with a 6 6 cm window diameter may be used as a bulk current injection probe over the frequency range 50 kHz to 2 MHz MODEL 95241 1 CALIBRATION JIG The Model 95241 1 Calibration Jig is used in equipment setup for measuring insertion loss of the current probe and is essential to set up equipment for some susceptibility test procedures CURRENT MONITORING PROBES Suggested current monitoring probes are Model 91550 1 10 kHz to 100 MHz and Model 94111 1 1 MHz to 1 GHz These probes have a 1 25 inch 3 2 cm window size and a transfer impedance of 1 ohm to 6 ohms over the 50 kHz to 400 MHz frequency range Operation Precautionary Measures CAUTION CAUTION A WARNING Before connecting any components follow the safety information in the ETS Lindgren Product Information Bulletin included with your shipment RF fields can be hazardous Observe appropriate RF exposure limits When measuring conductors that are not insulated use extreme care when installing the current probe and taking measurements If possible de energize the test sample during assembly and disassembly of the setup Also arrange to center the test conductor in the current probe wi
3. Model 95236 1 Model 95242 1 Bulk Current Injection Probes User Manual SETS LINDGREN An ESCO Technologies Company ETS Lindgren L P reserves the right to make changes to any product described herein in order to improve function design or for any other reason Nothing contained herein shall constitute ETS Lindgren L P assuming any liability whatsoever arising out of the application or use of any product or circuit described herein ETS Lindgren L P does not convey any license under its patent rights or the rights of others Copyright 2001 2010 by ETS Lindgren L P Rights Reserved No part of this document may be copied by any means without written permission from ETS Lindgren L P Trademarks used in this document The ETS Lindgren logo is a trademark of ETS Lindgren L P Revision Record MANUAL CURRENT PROBE 95236 95242 Part 399263 Rev D Revision Description Date A Initial Release October 2001 B Updates edits March 2002 C Updates edits February 2005 D Remove Model 95252 1 update June 2010 frequency range specifications rebrand Table of Contents Notes Cautions and Warnihgs ii v 1 0 Introduction nein a uu cete 7 Supporting EQUIPMENT 8 Optional Injection Probe e 8 Model 95241 1 Calibration dig 8 Current Monitoring probes 8 Operation Precautionary Measures ii 9 ETS Lindgren Product Information B
4. attended Useful Range Insertion Loss Typical dB Range 15 dB 1 MHz 100 MHz 95236 1 10 kHz 100 MHz 35 db 3 dB 10 kHz 95242 1 2 MHz 400 MHz 15 dB 10 MHz 400 MHz 15 This page intentionally left blank 16 4 0 Application The principal use of the Bulk Current Injection Probe BCIP is for inducing relatively large RF currents into the signal and power circuits of equipment under test for conducted susceptibility A secondary application would be to use the same probe in a more familiar role as a sensor for measuring weak conducted RF currents Conducted Susceptibility Conducted susceptibility testing is intended to ensure that RF signals when coupled on to interconnecting cables and power supply lines of a device under test DUT will not cause malfunction or degradation of performance In addition this testing can provide an amplitude vs frequency malfunction signature for the system which when compared with the levels of current on the cables in a typical operating environment can assist in the determination of adequate safety margins TYPICAL TEST SETUP Typical conducted susceptibility tests require that all power and interconnecting cables be tested by subjecting them to the required current or voltage levels while monitoring the applied current using a current probe Usually a reference level calibration is performed using a calibration jig with a specified impe
5. dance This reference curve is then replayed to expose the DUT to a controlled stress level while a current probe is used to ensure that a low impedance DUT is not overstressed Some tests may allow the reference calibration to be performed at a lower level and then scaled up to the required power level when applied to the DUT Entire cables or cable bundles may be tested or each line may be broken out and tested individually Some standards may also require simultaneous injection onto multiple cable bundles using several injection probes Absorbing clamps may be required to isolate peripheral equipment from the DUT and ensure that only the DUT is exposed to the required stress level See the pertinent test standard for more details 17 Test Setup Equipment The following equipment may be needed to set up the test environment 18 Current Injection Probes 95236 1 95242 1 Calibration Jig 95241 1 Current Monitoring Probes Signal Source Generator Power Amplifier s The power amplifier should be capable of supplying the full rated power into the current injection probes which have a high VSWR with a low harmonic content Spectrum Analyzer or Measuring Receivers Directional Coupler RF Voltmeter s RF Absorbing Clamp RF Attenuator RF Loads Sample Conducted Susceptibility Calibration Setup Diagrams DIAGRAM 1 ejnyxi 4 UOLJEJAI ED uonoaluy Ie9IdAL peo1 U 06 937 qua uno
6. esult in SEVERE personal injury and or property damage Included text gives proper procedures See the ETS Lindgren Product Information Bulletin for safety regulatory and other product marking information This page intentionally left blank vi 1 0 Introduction The ETS Lindgren Bulk Current Injection Probe BCIP Series is used to inject RF current into conductors and cables of electrical and electronic equipment undergoing susceptibility testing This manual includes information for these BCIP models e Model 95236 1 e Model 95242 1 The BCIP provides a means of applying a controlled RF stress level to an instrument under test through interconnecting cables or power cables without requiring a direct connection to the conductor s of interest The models in this series are simply clamped around the test conductor which then becomes a one turn secondary winding with the current probe forming the core and primary winding of an RF transformer RF energy can be injected onto single and multi conductor cables grounding and bonding straps outer conductors of shielding conduits and coaxial cables and so on Because of the high efficiency design the probes can also be used as sensors Frequency Range Useful Range 95236 1 1 MHz 100 MHz 10 kHz 100 MHz 95242 1 10 MHz 400 MHz 2 MHz 400 MHz The BCIP Series is especially designed to provide minimum insertion loss over these frequency ranges
7. ndow for additional voltage breakdown protection Do not permit the uninsulated current probe connector and cable connectors to come in contact with the ground plane or other nearby conductors This will prevent possible measurement error due to ground loops and will avoid danger from high voltages Ensure that the 50 ohm load is capable of safely dissipating the incurred power Should the load become disconnected the developed voltage will be come much greater and may be very dangerous ETS Lindgren Product Information Bulletin See the ETS Lindgren Product Information Bulletin included with your shipment for the following Warranty information Safety regulatory and other product marking information e Steps to receive your shipment e Steps to return a component for service e ETS Lindgren calibration service e ETS Lindgren contact information 10 2 0 Maintenance Before performing any maintenance follow the safety information in the ETS Lindgren Product Information Bulletin included with your shipment Maintenance of the Bulk Current Injection een Probe is limited to external components _ such as cables or connectors If you have any questions concerning maintenance contact ETS Lindgren Customer Service Annual Calibration See the Product Information Bulletin included with your shipment for information on ETS Lindgren calibration services Service Procedures
8. peyefu 104 JejeunjoA 09 jueuudinb3 juepuedeg 1521 9597 L495 1 J unIoA HU saduy JOJEJIBUSS eubis 19 DIAGRAM 2 jueundinb3 duejo 6uiglosgy jeuondo 159 jueunJsu 19 8Un OA 3H Jejdno2 jueuidinb3 Juapuadag 152 JOJ Je 95 eubis 20 5 0 Conducted Emission Transfer Impedance The Bulk Current Injection Probe BCIP may also be used as a sensor for measuring conducted emission The RF current Ip in microamperes in the conductor under test is determined from the measuring receiver reading of the probe output Es in microvolts divided by the probe transfer impedance 21 in ohms Ip Es Zr Or in dB le dBpA Es dBuV Zr dB The transfer impedance is determined by passing a known RF current Ip through the primary test conductor and noting the voltage Es developed across a 50 ohm load on the probe output Z1 Es lp Calibration gig 95241 1 may be used for this determination Following are the typical transfer impedance values when the BCIP is used as a sensor gt High sensitivity and minimal core gap indicate that the current probe should be used only on signal lines where heavy currents are not encountered Heavy currents may affect measurement accurac
9. s which connected the calibration jig and the injection probe under test Tune to the test frequency and adjust the signal level for a reference of 0 dBm indication on the RF voltmeter Without changing control settings connect the signal generator output to the bulk current injection probe input and connect the calibration jig connector to the RF voltmeter input Note the RF voltmeter output in dB The difference between this reading and 0 dB is the insertion loss In this measurement the loss cannot be less than 3 dB since half the injected power is absorbed by the 50 ohm termination that is particularly loading 5096 the calibration jig Appendix A Warranty See the Product Information Bulletin included with your shipment for the complete ETS Lindgren warranty for your Bulk Current Injection Probe DURATION OF WARRANTIES FOR BULK CURRENT INJECTION PROBE All product warranties except the warranty of title and all remedies for warranty failures are limited to two years Duration of Product Warranted Warranty Period Model 95236 1 Bulk Current Injection Probe 2 Years Model 95242 1 Bulk Current Injection Probe 2 Years 27
10. ulletin eene 10 2 0 11 Annual Galibrationi rara talee 11 Servico POCO US r imanen nen cer ires 11 3 0 9 ie kev 13 Physical Specifications sese 13 Electrical Specifications eese 14 4 0 Application uranio 17 Conducted Susceptibility en 17 Typical Test Set p ita eR Ere d 17 Test Setup Equipment ro den eoe a 18 Sample Conducted Susceptibility Calibration Setup Diagrams 19 Diagrarm dies 19 Diagrami ER 20 5 0 Conducted Emission Transfer Impedance 21 Model 952906 1 nete i alia ai RERO IS 22 95242 1 bisce eret reo he rede ete D Due a ere 23 6 0 Insertion Loss rrr recen 25 Eq ipment l 25 Typical Reference Calibration Setup 25 Procedure ascr iaia 26 Appendix A Warranty ii 27 This page intentionally left blank Notes Cautions and Warnings 3 Note Denotes helpful information intended to provide tips for better use of the product Caution Denotes a hazard Failure to follow instructions could result in minor personal injury and or property damage Included text gives proper procedures Warning Denotes a hazard Failure to follow instructions could r
11. y should current probe core saturation occur 21 22 Model 95236 1 Frequency MHz Z 1 16 2 20 3 19 4 19 5 19 6 19 7 19 8 19 9 19 10 19 20 18 30 18 40 17 50 16 60 15 70 14 80 13 90 12 100 11 Model 95242 1 Frequency MHz Z 2 7 4 13 6 19 8 22 10 27 20 25 30 27 40 30 50 32 60 32 70 32 80 30 90 30 100 30 200 33 300 32 400 30 23 This page intentionally left blank 24 6 0 Insertion Loss Insertion loss of the Bulk Current Injection Probe BCIP may be measured at low signal levels ETS Lindgren offers this measurement as a calibration service See the Product Information Bulletin included with your shipment for information on ETS Lindgren calibration services Equipment Signal Generator 50 Ohms 10 kHz to 400 MHz RF Voltmeter 50 Ohms 10 kHz to 400 MHz Calibration Jig 95241 1 50 Ohm Termination VSWR 1 2 Bulk Injection Current Probe 95236 1 or 95242 1 Typical Reference Calibration Setup Signal RF Generator Voltmeter 500 500 500 Termination Calibration Jig 25 26 Procedure Connect the signal generator output directly to the RF voltmeter input as show in Typical Reference Calibration Setup on page 25 indicated by the dashed line Use the same cable
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