200A MICRO-OHMMETER ENGLISH User Manual
Contents
1. u ui ass 20 Technical and Sales Assistance 20 Limited Warranty Eee ccs 21 Warranty 21 2 Micro Ohmmeter Model 6290 CHAPTER 1 INTRODUCTION WARNING These safety warnings are provided to ensure the safety of personnel and proper operation of the instrument Do not attempt to perform any tests with this instrument until you have read the user manual Tests are to be carried out on de energized circuits only Never connect the unit to a live circuit The micro ohmmeter must be connected to the earth ground point through the green terminal or the power cord During a circuit breaker measurement its contacts must be closed and connected to an earth ground point The end connected to an earth ground point must be connected to the C terminal Ensure the terminals are free of any voltage in relation to earth ground point and between each other Take into account that in a substation you will find in disconnected points high potential levels in relation to the earth ground point Those potentials are caused by presence of electromagnetic fields and can be mini mized following the indications in the paragraph before Make sure that the current connections are well connected as well as the C clamp to avoid undesirable heating Be careful when manipulating the current terminals in the instru ment High temperatures may o2. 10 Micro Ohmmeter Model 6290 Saved aa 50 100 13 0340 200 DUERRHHGE 0 50 100 150 200 1464 88 1 DUERHERT ING 0 100 150 200 14704708 Micro Ohmmeter Model 6290 m lu B When pressing the Save button this message will be displayed indicating that the measured value was saved in internal memory Indicates that the measured resistance is higher than the maximum value readable in the selected range Indicates that some part of the instrument has reached critical temperature and thus the system will disable test current generation 11 CHAPTER 3 OPERATION 3 1 Protection 3 1 1 Start with 0 Quick variations of current may cause damage to sensitive components To prevent this the instrument has a built in protection that requires the test to start at zero current Only start the measurement if the Test Current control knob is at the start fully counter clockwise position If not the Start button will be disabled the display will read START WITH I O If the operator increases the test current by quickly turning the Test Current control knob clockwise the instrument will automatically implement a slow current increase to the selected value 3 1 2 Temperature Protection The Model 6290 test time for continuous use is limited by thermal condi tions Internal sensors measure the temperature of sensitiv
3. 200A MICRO OHMMETER 6 2 9 0 User Manual INSTRUMENTS Statement of Compliance Chauvin Arnoux Inc d b a AEMC Instruments certifies that this instrument has been calibrated using standards and instruments traceable to international standards We guarantee that at the time of shipping your instrument has met its published specifications An NIST traceable certificate may be requested at the time of purchase or obtained by returning the instrument to our repair and calibration facility for a nominal charge The recommended calibration interval for this instrument is 12 months and begins on the date of receipt by the customer For recalibration please use our Calibration services Refer to our repair and calibration section at www aemc com Serial Catalog 2129 82 Model 6290 Please fill in the appropriate date as indicated Date Received Date Calibration Due Chauvin Arnoux Inc d b a AEMC Instruments INSTRUMENTS www aemc com Table of Contents 1 Micro Ohmmeter Model 6290 INTR0DUCTI0N 3 1 1 International Electrical 4 1 2 Definition of Measurement Categories 4 1 3 Receiving Your 4 1 4 Ordering 5 1 4 1 Accessories
4. water or other foreign agents into the electronic module When replacing fuses install only fuses which are direct replace ments Cleaning WARNING Disconnect the instrument from any source of electricity If the case needs cleaning do not use any alcohol or oil based cleaners Preferably use soapy water with a damp cloth or sponge Dry immediately after cleaning Avoid water penetration into the electronic module Make sure the micro ohmmeter and all leads are dry before fur ther use Micro Ohmmeter Model 6290 17 4 3 Fuse Replacement NOTE Make sure that no terminals are connected and that the switch is in the OFF position before replacing the fuse To replace the fuse proceed as follows 18 Set the switch to OFF Disconnect the measurement leads from the input terminals Using a screwdriver unscrew the fuse cover from the faceplate Remove the blown fuse using a screwdriver Insert a new fuse 5x20 12A then screw the cover back onto the faceplate Micro Ohmmeter Model 6290 CHAPTER 5 SPECIFICATIONS Test Current Range 100A 200A True DC Adjustable from 0 to 100 to 199940 test current up to 200A 0 to 19 99mQ test current up to 100A Resistance Range Accuracy 0 5 of Reading 2cts 0 14Q for R lt 2001 Resolution 1 for R gt 2000 10uQ for R gt 20mQ 3 5Vpc 200A 4 500 100A Output Voltage 5 8Vpc no load Max Load Res
5. AN 100362 v2 Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover 03820 USA e Phone 603 749 6434 e Fax 603 742 2346 www aemc com
6. and Replacement Parts 5 PRODUCT FEATURES 6 2 1 Description ete e ei tare 6 2 22 Features etes DERE cen ats Get ceo 7 2 9 nonet edite i tit tm feo 7 2 4 Control Features dae Ran 8 2 5 Display etit dene A tee tide ain 9 2 5 1 Analog Bargraph sess 9 2 5 2 Built in 9 2 5 3 Real time 9 2 54 Test Number erat ese te mre eta ce 9 2 5 5 Model and Serial 9 2 6 Display Messages emen 10 OPERATION 12 3 1 12 12 3311 3 1 2 Temperature Protection 12 3 2 Use of Test Probes 12 3 9 item eite do dos 13 9 4 Internal 16 17 4 1 es Melts um at ates 17 4 2 01 tie btn Ah 17 4 3 Fuse 18 5 SPECIFICATIONS 19 Repair and
7. ccur in the current connections Never connect or disconnect the cables during a measurement If a modification must be made press the Stop button first The micro ohmmeter should never be used in an explosive envi ronment this includes poorly ventilated battery rooms and enclo sures The instrument test leads and measuring wires must be free of defects and should be changed if there is any evidence of deterio ration insulation split burnt etc Never exceed the safety values indicated in the specifications Micro Ohmmeter Model 6290 3 International Electrical Symbols This symbol signifies that the instrument is protected by double or rein forced insulation CAUTION Risk of Danger Indicates a WARNING and that the operator must refer to the user manual for instructions before operating the instrument in all cases where this symbol is marked Important instructions to read and understand completely Important information to acknowledge Risk of electric shock The voltage at the parts marked with this symbol may be dangerous HEE gt oO Ground Earth symbol Compliance with the Low Voltage amp Electromagnetic Compatibility European directives 73 23 CEE amp 89 336 CEE xt 1 2 CAT I CAT II CAT IIl CAT IV 1 3 In the European Union this product is subject to a separate collection system for recycling electrical and elec
8. e components and trigger the protection that will stop the test current if they exceed the temperature limit preventing any damage The OVERHEATING message will appear in the display Under these conditions measurements will be inhibited until the temperature decreases sufficiently 3 22 Use of Test Probes WARNING Only use the test leads supplied with the instrument for mea surement and calibration procedure e Make sure that the current connections are securely connected as well as the C clamps to avoid undesirable heating e Pay attention when adjusting the current terminals of the instrument High temperatures may occur in the current connections e Make sure that the leads are not coiled during the measurement to avoid overheating 12 Micro Ohmmeter Model 6290 33 Operating WARNING Before using this instrument read the user manual and safety warnings on page 3 Safety procedures and rules for working near high voltage energized systems must be observed during the use of this instrument The generated voltages and currents may be dangerous The Micro ohmmeter Model 6290 uses the four terminal Kelvin method to prevent test lead resistance error during measurement Test current may be chosen by the operator and the reading is obtained by com parison through internal high stability standards The measurement result appears in the alpha numeric display WARNING Before performing measurements verify that the device
9. ed time in minutes and seconds since the test current was applied 2 5 3 Real time Clock Displays date hours and minutes to assist in the identification of tests recorded in memory 2 5 4 Test Number Tests are automatically numbered and stored with the test results 2 5 5 Model and Serial Number At the beginning of each test the instrument model and serial number are registered making it possible to log the test results with their respective instrument Calibration Certificate Micro Ohmmeter Model 6290 9 2 6 Display Messages REMC MODEL 6298 The introduction screen appears momentarily when the instrument h is turned on 2847085 Auto Check 1 3 Next the instrument will display a functional check message while 2 T performing initial start up 14 0488 START WITH 8 Start with 0 warns the operator that to start a test the S Test Current control knob must be 1104 at the zero position fully counter clockwise Otherwise the Start button will be inhibited FRESS START Indicates that the instrument is ready to start a measurement by t A pressing the Start button 1484 5 LOL CLIPREHT Indicates that the test current is too low to carry out the t 4 measurement It appears at 144 85 15 20 the beginning of each test and remains until the Test Current control knob is adjusted in a clockwise direction to an acceptable level
10. een tampered with abused or if the defect is related to service not performed by AEMC Instruments Full warranty coverage and product registration is available on our web site at www aemc com warranty html Please print the online Warranty Coverage Information for your records What AEMC Instruments will do If a malfunction occurs within the one year period you may return the instrument to us for repair provided we have your warranty registration information on file or a proof of purchase AEMC Instruments will at its option repair or replace the faulty material REGISTER ONLINE AT Warranty Repairs What you must do to return an Instrument for Warranty Repair First request a Customer Service Authorization Number CSA by phone or by fax from our Service Department see address below then return the instrument along with the signed CSA Form Please write the CSA on the outside of the shipping container Return the instrument postage or shipment pre paid to Ship To Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover NH 03820 USA Phone 800 945 2362 Ext 360 603 749 6434 Ext 360 Fax 603 742 2346 or 603 749 6309 E mail repair aemc com Caution To protect yourself against in transit loss we recommend you insure your returned material NOTE You must obtain a CSA before returning any instrument Notes Micro Ohmmeter Model 6290 21 INSTRUMENTS EJAEMC 06 12 99 M
11. erface Direct printout using supplied software Rugged light weight and water resistant Applications Test switchgear contact resistance Test circuit breaker contact resistance Test air frame bonding Test rail bonding Test pipeline bonding Micro Ohmmeter Model 6290 24 Control Features NE E r O 6 SAVE START STOP z a re 6 207 E 9 10 Figure 2 1 1 Current output terminal C 9 Start button 2 Potential terminal P 10 Stop button 3 Alphanumeric display 11 Test current control knob 4 Potential terminal P 12 USB interface 5 Current output terminal C 13 ON OFF Switch 6 Ground terminal 14 Fuse 7 Range and test current 15 Power cord connector selector Save button 8 Micro Ohmmeter Model 6290 2 5 Display The alphanumeric LCD display indicates the measurement result the corresponding measuring unit the elapsed time since the measurement started the analog bargraph and digital indication of test current and any messages to the operator Messages to the operator Test number Measurement results Elapsed time Analogue indication Current bargraph 0 50 100 150 200 13 7040 Date Figure 2 2 2 51 Analog Bargraph The instrument indicates the test current value on the bargraph and digital display 2 5 2 Built in Chronometer Displays the elaps
12. istance 10 200A 30 100A Measurement Method Four terminal Kelvin type Up to 1 minute of continuous use at 200A before thermal Operation Time protection activates Up to 15 minutes use at 100A before thermal protection activates Protects all sensitive components preventing any damage due to overheating Thermal Protection Memory Stores up to 200 measurements Interface USB Communication Software Supplied Power Supply 100 to 130Vac 60Hz MECHANICAL Dimensions 19 76 x 15 51 x 7 48 502 x 394 x 190mm Weight Approx 24 25 lbs 11kg ENVIRONMENTAL Operating Temperature 23 to 122 F 5 to 50 C Storage Temperature 13 to 149 F 25 to 65 C Humidity 95 RH non condensing Safety Rating IEC61010 1 Environmental Protection IP54 with closed lid CE Mark Pending Specifications are subject to change without notice Micro Ohmmeter Model 6290 19 Repair and Calibration To ensure that your instrument meets factory specifications we recommend that it be scheduled back to our factory Service Center at one year intervals for recalibration or as required by other standards or internal procedures For instrument repair and calibration You must contact our Service Center for a Customer Service Authorization Number CSA This will ensure that when your instrument arrives it will be tracked and processed promptly Please write the CSA on the outside of the shipping containe
13. r If the instrument is returned for calibration we need to know if you want a standard calibration or a calibration traceable to N I S T Includes calibration certificate plus recorded calibration data Ship To Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover NH 03820 USA Phone 800 945 2362 Ext 360 603 749 6434 Ext 360 Fax 603 742 2346 or 603 749 6309 E mail repair aemc com Or contact your authorized distributor Costs for repair standard calibration and calibration traceable to N I S T are available NOTE You must obtain a CSA before returning any instrument Technical and Sales Assistance If you are experiencing any technical problems or require any assistance with the proper operation or application of your instrument please call mail fax or e mail our technical support team Chauvin Arnoux Inc d b a AEMC Instruments 200 Foxborough Boulevard Foxborough MA 02035 USA Phone 800 343 1391 508 698 2115 Fax 508 698 2118 E mail techsupport aemc com www aemc com NOTE Do not ship Instruments to our Foxborough MA address 20 Micro Ohmmeter Model 6290 Limited Warranty The Micro ohmmeter Model 6290 is warranted to the owner for a period of one year from the date of original purchase against defects in manufacture This limited warranty is given by AEMC Instruments not by the distribu tor from whom it was purchased This warranty is void if the unit has b
14. the current until the desired current is reached plaa A 14 84 88 15 38 8 The lowest test current is nominally 1096 of the range It is important to consider that measurement errors increase while test current decreases 9 The measurement results can be stored in the internal memory by pressing the blue Save button 10 Press the red Stop button to complete the measurement 11 Finally when finished turn the instrument off using the On Off Switch Micro Ohmmeter Model 6290 Save Stop D 15 3 4 Internal Memory The Model 6290 can store up to 200 measured values in internal memory During a measurement press the Save button to store a value Saved aa 50 100 150 200 14 84 88 15 38 The instruments model and serial number test number date and time elapsed test time test current and measured value will be stored 16 Micro Ohmmeter Model 6290 CHAPTER 4 MAINTENANCE Use only factory specified replacement parts AEMC will not be held responsible for any accident incident or malfunction following a repair done other than by its service center or by an approved repair center 4 1 4 2 Warning To avoid electrical shock do not attempt to perform any servicing unless you are qualified to do so Do not perform any service while the micro ohmmeter is on any circuit To avoid electrical shock and or damage to the instrument do not get
15. the art signal amplification system offset free with high long term stability Resistance readings are shown in the alphanumeric display with up to 4 2 digit resolution with display of measurement resistances up to 20mQ and resolution down to 0 1110 Test currents may be adjusted by the operator and are measured using an analog bargraph indicator and digital display The Model 6290 has an internal memory for storing up to 200 readings The USB interface may be connected to a computer to download the stored values using the included application software The high current generation system is based on modern technology that allows for a significant decrease in both weight 24 25 Ibs 11kg and size The case is made of hard plastic making it highly resistant to impact and environmental conditions Internal thermal sensors in all sensitive components prevent damage to the instrument caused by overheating This is a rugged but lightweight instrument and may be easily carried by one person It is water resistant and can be used under severe weather conditions IP54 with case closed offering an excellent performance working both in the laboratory and out in the field 6 Micro Ohmmeter Model 6290 2 2 2 3 Features Accurately measures low contact resistances with test currents up to 200A Measures resistances up to 20mQ Resolution of 0 1 Analog bargraph indicator with digital display Stores up to 200 test results USB int
16. tronic components In accordance with directive WEEE 2002 96 EC Definition of Measurement Categories For measurements on circuits not directly connected to the AC supply wall outlet such as protected secondaries signal level and limited energy circuits For measurements performed on circuits directly connected to the electrical distribution system Examples are measurements on household appliances or portable tools For measurements performed in the building installation at the distribution level such as on hardwired equipment in fixed installation and circuit breakers For measurements performed at the primary electrical supply 1000V such as on primary overcurrent protection devices ripple control units or meters Receiving Your Shipment Upon receiving your shipment make sure that the contents are consistent with the packing list Notify your distributor of any missing items If the equipment appears to be damaged file a claim immediately with the car rier and notify your distributor at once giving a detailed description of any damage Save the damaged packing container to substantiate your claim 4 Micro Ohmmeter Model 6290 14 Ordering Information Micro ohmmeter Model 6290 Cat 2129 82 Includes meter in hard carrying case one accessory case set of two Kelvin leads 20ft w C clamps one green ground lead w clamp USB cable 5ft power cord 110V fuse 5
17. under test is not energized 1 Connect the instrument to an AC power supply 2 Before turning the instrument on connect the test probes to the device to be tested and to the front panel terminals RED TEST LEAD ELEMENT TO BE MEASURED MICRO OHMMETER MODEL 6290 BLACK TEST LEAD WARNING Do not connect or disconnect the test leads during a measurement Micro Ohmmeter Model 6290 13 Turn the instrument ON using the On Off switch Use the Range selector switch to choose the measurement range and test current An introduction message appears momentarily and then the instrument will make functional checks Be sure that the Test Current control knob is at the start posi tion counter clockwise position Otherwise the Start button will be inhibited and the display will show the START WITH 0 mes sage The PRESS START message will then appear showing that a measurement can be started Press the green Start button The LOW CURRENT message will appear ON T OFF 0 200000 0 20mQ max 200A max 100A REMC MODEL 6298 make sure knob is in the start position 0 or the display will show this message START WITH 1464 83 15 38 PRESS START 13 15 38 1420408 15 38 Micro Ohmmeter Model 6290 7 Turn the Test Current control knob clockwise increasing
18. x20 12 PC software and user manual 1 41 Accessories and Replacement Parts Lead Set of 2 50 ft Color coded Kelvin leads red black with attached C Clamp Cat 2129 87 Lead Replacement 10 ft Earth Ground green with attached Cat 2129 88 Lead Replacement Set of 2 20 ft Color coded Kelvin leads red black with attached C Clamp Cat 2129 89 Fuse Replacement Set of 5 12A 250V 5x20mm Cat 2129 90 Cable 5 ft USB cable Cat 2140 46 Power 110 US 3 Prong 7 Cat 5000 40 Order Accessories and Replacement Parts Directly Online Check our Storefront at www aemc com for availability Micro Ohmmeter Model 6290 5 CHAPTER 2 PRODUCT FEATURES 2 1 Description The AEMC high current Micro ohmmeter Model 6290 is a portable microprocessor controlled instrument It has optimized filters and protection for measurements in electrical substations The Model 6290 can be used to accurately measure very low contact resistances of high voltage circuit breakers switches busbars etc with test currents up to 200A It employs the four terminal Kelvin method to prevent errors caused by test leads and their contact resistances Measurement accuracy is guaranteed through a state of
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