User Manual - Chauvin Arnoux Group
Contents
1. 19 42 ClANING sii nv u yl h a u u L k 19 Repair and Calibration L k KA KA KAK KA A 20 Technical and Sales Assistance a 20 Limited Warranty kk kek Ke kek Ka KAK KK KA KA KAK KA 21 Warranty Repall yx Zl land Aichi cae E ths ee eae eat AU 21 2 GroundFlex Adapter Model 6474 CHAPTER 1 INTRODUCTION WARNING N These safety warnings are provided to ensure the safety of personnel Please read and comply with these precautions This instrument is protected from accidental voltages of not more than 50V with respect to earth in measurement CAT IV The guaranteed level of protection of this equipment may be compromised if used in a manner not specified by the manufacturer Safety is the responsibility of the operator All metal objects or wires connected to the electrical system should be assumed to be lethal until tested Grounding systems are no exception Never exceed the maximum rated voltage and current and the mea surement category Never exceed the protection limits and always comply with the condi tions and place of use indicated in the specifications Do not use the instrument or its accessories if they appear damaged Use accessories that have overvoltage category and service voltages greater than or equal to those of the instrument CAT IV 52. 4 14 Ordering Information 5 1 4 1 Accessories and Replacement Parts 5 2 GROUNDFLEX ADAPTER 6 2 1 Gontrol Features partion peso ea een 6 2 2 GroundFlex9 Sensor kek KK 7 2 2 1 Calibration of GroundFlex Sensors 8 2 3 Measurements in AUTO 4 6 10 2 3 1 Preparation of the GroundFlex Adapter 10 2 3 2 Making a Measurement Resistance of Legs 12 2 3 3 Other Measurements 14 2 4 MANUAL Mode and SWEEP Mode 14 3 SPECIFICATIONS 16 80 1 1 819 etu aS aa us a asus 16 3 2 Mechanical n ee 16 9 3 una apiu aku aaa e ela 18 BEA Safely ha um E r 18 4 MAINTENANCIE 19 4 1 Maintenance
3. For measurements on circuits not directly connected to the AC supply wall outlet such as protected secondaries signal level and limited energy circuits CAT Il For measurements performed on circuits directly connected to the electrical distribution system Examples are measurements on household appliances or portable tools CAT Ill For measurements performed in the building installation at the distribution level such as on hardwired equipment in fixed installation and circuit breakers CAT IV For measurements performed at the primary electrical supply lt 1000V such as on primary overcurrent protection devices ripple control units or meters 1 3 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 carrier and notify your distributor at once giving a detailed description of any damage Save the damaged packing container to substantiate your claim 4 GroundFlex Adapter Model 6474 1 4 Ordering Information NOTE The GroundFlex Adapter Model 6474 is a factory supplied product and only operates with the Ground Tester Model 6472 Kit 500 ft GroundFlex Adapter Model 6474 Cat 2136 01 Includes the GroundFlex Adapter Model 6474 four GroundFlex sensors 5m 16ft with twelve color coded rings
4. Measuring Time Short push on START approx 7 s for first value of R at 128Hz then 3 measurements per s Long push on START approx 15 s for first value of R at 128Hz then 3 measurements per s Pylon Measurement with GroundFlex Measurement 0 067 to 10 00 to 100 0 to 1 000 to 10 00 to Range 9 9990 99 990 999 902 9 999KQ 99 99KQ Resolution 0 001Q 0 019 0 1Q 10 10Q Test Voltage 16 or 32V user selectable Frequency From 41 to 128Hz selectable Resistance Measurement Frequency Accuracy 5 of Reading 1ct 128Hz From 41 to 5078Hz selectable The intrinsic error specified refers to reference conditions with a test voltage of 32V test frequency of 128Hz R and R 1kQ no external voltage The operating error for measurements of R R and R is the same as that specified for 4 Pole earth resistance measurement The operating error of AC resistance measurements can be less than that specified for voltage or current because frequency characteristics of the voltage channel are matched to those of the current channel 16 GroundFlex Adapter Model 6474 For test frequencies between 41 and 5087 Hz between 1 and 4 turns of the GroundFlex sensor and a selection of 1 to 4 measurement channels the operating accuracies are the following SENSITIVITY and minimum I minimal Operating accuracy for R Sx 1 10 ka gt 10mA 10 465 6 1 gt
5. carrying case for meter connection lead two extension leads on H reel black green with color coded alligator clips six BNC extension leads calibration loop three C clamps and a user manual GroundFlex Field Kit Model 6472 and 6474 Cat 2136 03 Includes the GroundFlex Adapter Model 6474 Cat 2136 01 above Ground Resistance Tester Model 6472 carrying bag for meter carrying bag for kit hard carrying case opti cal USB cable power adapter 110 240V with power cord 115V US two 500 ft color coded leads on spools red blue two 100 ft color coded leads hand tied green black one 30 ft lead green four T shaped auxiliary ground electrodes set of five spaded lugs one 100 ft AEMC tape measure rechargeable NiMH batteries and a USB stick with DataView soft ware ground tester workbook and user manual 1 4 1 Accessories and Replacement Parts Bag 6 Carrying Bag for Ground a Cat 2119 82 Tape Measure AEMC 100 Cat 2130 60 Set of two 14 5 T shaped Auxiliary Ground Electrodes Cat 2135 39 Optical USB Cable nude acszessueigessotee cise teesgticbeseneastsnentenest cree Cat 2135 41 Replacement One GroundFlex 5m 16ft Sensor Cat 2135 73 Replacement Connection Lead for Model 6472 6474 Cat 2135 75 Replacement One BNC 15m 50ft Extens
6. GroundFlex sensor four times around in the calibration loop and close it using its screw connector Place the connector as far as possible from the calibration device 8 GroundFlex Adapter Model 6474 Set the switch of the 6472 to SET UP Set the SENSOR TURNS switch to 4 Set the SENSITIVITY switch to x1 Set the INPUT SELECTION switch to 1 gt SET UP SENSOR TURNS 5 Press the HzZ OPTIONS button 5 times The device starts by comparing the current injected by the device into the calibration loop to the current la measured by the GroundFlex sensor If they are different the CAL symbol blinks to recommend a calibration EL LL LL K EL Cm a x5 ink A f Hz OPTIONS NOTE To avoid measurement errors do not touch the GroundFlex sensor or the calibration loop during the calibration GroundFlex Adapter Model 6474 6 To start the calibration press 2nd START 7 The device calculates and stores a calibration coefficient for the GroundFlex sensor connected to channel 1 s 022 YER AUTO ki Da Pad ae 3 gt r Om s I qm 2 START STOP This operation must be repeated for channels 2 3 and 4 the INPUT SELECTION switch must be set to the corresponding position each time The calibration values are now stored into memory After calibr
7. as possible on the ground taking care not to form loops and to avoid placing the cables near or parallel to metallic conductors cables rails fences etc Effects of interference are measured in milli ohms gt Connect these auxiliary electrodes to the terminals H Z and S Y on the Model 6472 s front panel gt Important The terminals ES Xv and E X must be connected to a conduct ing metallic part of the tower located above the GroundFlex sensors This ensures measurement of the current flowing downward and towards the earth otherwise you would measure the current flowing upward from the earth to the top of the tower This will tell the condition of the overhead ground conductor a Connect the required number of GroundFlex sensors to channels 1 2 3 and or 4 the channels for which they are calibrated and place the Ground Flex sensors around the legs of the tower A NOTE The direction of coiling of the sensors around tower legs have no effect on the measurement but all of the GroundFlex sensors must be coiled in the same direction and have the same orientation check arrow direction on the sensor and they must all have the same number of turns Sensors should encircle both leg AND ground system 12 GroundFlex Adapter Model 6474 Overhead earth wire a High voltage as lines AN Pe 4 GroundFlex sensors connected with the same orientati
8. 0V Use only accessories that comply with safety standards IEC 61010 2 031 amp 32 Wear the appropriate protective gear insulating boots and gloves Check that no terminal is connected and the switch is set to OFF before opening the device Use only the charging unit supplied with the instrument to recharge the battery Troubleshooting and metrological verification procedures must only be performed by qualified approved personnel or the factory NOTE The potentials on the various rods used for an earth measurement may be different if a nearby electrical installation is defective or certain weather conditions prevail thunderstorms It is up to the operator to decide whether to continue or postpone measurements in these situations GroundFlex Adapter Model 6474 3 1 1 International Electrical Symbols Signifies that the instrument is protected by double or reinforced insulation This symbol on the instrument indicates a WARNING that the operator must refer to the user manual for instructions before operating the instrument In this manual the symbol preceding instructions indicates that if the instructions are not followed bodily injury installation sample and or product damage may result Risk of electric shock The voltage at the parts marked with this symbol may be dangerous Ground Earth symbol PB In conformity with WEEE 2002 96 EC 1 2 Definition of Measurement Categories CAT I
9. E GROUNDFLEX ADAPTER 6 4 4 EJAEMC INSTRUMENTS User Manual 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 NIST traceable calibration is only possible when the Model 6474 is connected to the Ground Tester Model 6472 To obtain NIST calibration for a nominal charge the instrument would need to be returned to our facility along with your Ground Tester Model 6472 The recommended calibration interval 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 Model 6474 Please fill in the appropriate date as indicated Date Received Date Calibration Due Chauvin Arnoux Inc B d b a AEMC Instruments INSTRUMENTS www aemc com gt ee ee ee Table of Contents 1 INTRODUCTION 3 1 1 International Electrical Symbols e 4 12 Definition of Measurement Categories 4 13 Receiving Your Shipment a
10. NPUT selection switch accordingly You can mea sure the current flowing through one GroundFlex sensor 1 2 3 or 4 or through several sensors 1 2 or 1 2 3 or through all of the sensors 1 2 3 4 4 Select how many times the sensor is wrapped around the conductor to be measured from 1 to 4 turns using the SENSOR TURNS selection switch A NOTE To increase measurement sensitivity we recommend when possible wrapping a maximum number of turns up to 4 around the structure 5 Setthe SENSITIVITY switch to the desired sensitivity x1 10 x1 or x10 The choice of sensitivity depends on the expected current value As a precaution always start with the lowest sensitivity x1 10 and increase it as needed GroundFlex Adapter Model 6474 11 2 3 2 Making a Measurement Resistance of Legs _ Place auxiliary electrodes H Z and S Y on opposite sides of the tower as far away as possible 100 150 ft and if possible perpendicular to the high voltage line depth is not important This will eliminate interference with the measurement by stray voltages or currents induced under the high voltage line A NOTE The H Z and S Y electrodes can be placed in the same direction if necessary In this case the S Y electrode should be placed at 62 the distance of H 2 2 In order to avoid electromagnetic interference it is best to unwind the full length of each cable from the reel to keep the cables as far apart
11. SMA 5 Acts a gt SMA 5 4cts 5MA gt gt 0 5mA 15 10cts Current Measurement with GroundFlex Mezs rement tango me Resolution 0 1 1mA 0 01A 0 1A Frequency 16 to 400Hz Accuracy lt 5 of Reading 50 60Hz 1 Valid only in the SENSITIVITY x 10 setting The current measured depends on the number of turns of the GroundFlex sensor around the conductor to be measured e g if the GroundFlex sensor is wrapped 4 times around a conductor carrying a current of 1A the input signal will be the same as if the GroundFlex sensor were wrapped once around a conductor car rying a current of 4A The operating error is therefore indicated for an input signal current in A tr Ampere turns The minimum current measured depends on the setting of the SENSITIVITY switch as indicated by the table below SENSITIVITY Tam Atr Points additional error pt er x10 0 01 5 x1 0 04 2 x1 10 0 16 2 Accuracy Current A turn 16 to 49Hz 50 to 99Hz 100 to 400Hz ly t0 0 399 20 pt er 5 pt er 3 pt er 0 4 to 39 9 10 2ct 3 2ct 3 2ct 40 to 99 9 10 2ct 3 2ct 20 2ct GroundFlex Adapter Model 6474 17 3 2 Mechanical Dimensions 10 7 x 9 76 x 5 12 272 248 x 130mm Weight 7 lbs 3 2kg approx Case Material ULVO Polypropylene Termin
12. als 4mm recessed banana jacks Case Protection EN 60529 IP53 cover closed Drop Test Per EN 61010 1 Vibration Test Per EN 61557 1 3 3 Environmental Operating Temperature 32 to 113 F 0 to 45 C 0 to 90 RH Specified Operating Temperature 0 to 95 F 0 to 35 C 0 to 75 RH Storage Temperature 40 to 158 F 40 to 70 C 0 to 90 RH Altitude lt 3000m 1 This range corresponds to the one defined by standard EN 61557 for which an operating error including the quantities of influence is defined When the device is used outside this range 1 5 10 C and 1 5 between 75 and 90 RH must be added to the operating error 3 4 Safety Electromagnetic Compatibility This instrument satisfies the EMC and LVD directives required for the CE marking and product standard IEC 61326 1 Ed 97 A1 Ed 98 Immunity in industrial environment Emissions in residential environment Electrical safety according to EN 61010 1 Ed 2 of 2001 Measurement according to EN 61557 Ed 2 of 2007 parts 1 4 and 5 CAT IV 50V Pollution Degree 2 All specifications are subject to change without notice 18 GroundFlex Adapter Model 6474 CHAPTER 4 MAINTENANCE 41 Maintenance A Please make sure that you have read and fully understand the WARNING section on page 3 To avoid electrical shock do not attempt to perform any servicing unless you are qualified to do so To avoid electrical shock and o
13. ation the GroundFlex sensors must always be connected to their re spective channels A NOTE Always connect the same sensor to the same input 2 3 Measurements in AUTO Mode 2 3 1 Preparation of the GroundFlex Adapter The GroundFlex Adapter Model 6474 is designed to be used only with the Model 6472 device The two instruments must be connected using the special connection cable supplied The Model 6474 has no ON OFF button and is powered only by the Model 6472 via this connection cable The Model 6474 is intended primarily to measure the current that flows through a high voltage tower to the ground You can wrap up to 4 legs of the towers each with a GroundFlex sensor and measure the current flowing to earth through each of the legs or through several legs 1 Set the rotary function switch to GroundFlex on the Model 6472 When you connect the GroundFlex Adapter Model 6474 to the 6472 a self test will begin During this test the OVERLOAD check light on the 6474 is lit 2 Connect the required number of sensors to channels 1 2 3 and or 4 10 GroundFlex Adapter Model 6474 A NOTE The sensors have arrows to indicate a direction All sensors should face the same direction clockwise or counter clockwise around the tower legs e All sensors should have the same number of wraps e Sensors should encircle both leg AND ground system lt To the Model 6472 3 On the Model 6474 set the I
14. er to measure the current flowing ISEL downward through the sensor towards the earth to measure ground resistance of the leg If connections ES Xv and E X are placed below the GroundFlex sensor the latter measures the current flowing towards the top of the tower via the overhead ground conductor at its top and you can in this way evaluate the quality of this overhead ground conductor You can even make this measurement without moving the contacts of ES Xv and E X on the tower by simply passing the 2 connecting cables through the Ground Flex sensor The current in connecting cable E X and the current through the leg of the tower then cancel each other out You can also measure any leakage currents I Act flowing through each leg of the tower in normal operation of the high voltage line If you find different leakage currents in each leg but they cancel out when added together you can conclude that these currents induced by the rotating field of the high voltage lines indicate an earthing fault of the tower via the overhead ground wire at the tip of the mast 2 4 MANUAL Mode and SWEEP Mode Use the HZ OPTIONS button and button to change to MANUAL mode The following parameters can be modified 128Hz blinks gt Change the test frequency Test voltage blinks gt Switch between 16 and 32V You can also perform a frequency sweep and a smoothing 14 GroundFlex Adapter Model 6474 In the sweep mode the measu
15. hich is part of the sensor This closed loop is then used to make a contact free measurement of the current flowing in the conductor leg it is wrapped around These sensors are current measurement clamps but are able to enclose objects that are much larger GroundFlex sensors are available in lengths of up to approx 24 ft 8m and can be placed around objects such as tower legs up to in approx 8 ft diameter 2 7m QS lt N SS GroundFlex Adapter Model 6474 2 2 1 Calibration of GroundFlex Sensors Calibration is necessary for a new sensor one that is no longer identified when a sensor has been replaced or more than 2 lengths of extension cable is used The calibration coefficients are then stored in the Model 6474 NOTE Do not move or touch the GroundFlex sensor or the calibration loop during the calibration This could cause errors Start by identifying each sensor using the identification rings that are supplied with the Model 6474 1 Brown 2 Red 3 Orange 4 Yellow e Connect the calibration loop between terminals H and E of the Model 6472 e Connect the Model 6472 and 6474 together using the connection cable e Connect the GroundFlex sensor with the Brown ring to Input 1 of the Model 6474 the one with the Red ring to Input 2 the one with the Orange ring to Input 3 and the one with the Yellow ring to Input 4 Coil the
16. ion Lead Cat 2135 76 Replacement Set of 12 GroundFlex Rings red yellow Drown Orange 2135 77 Replacement Green Extension Lead a 2135 78 Replacement Black Extension Lead 2135 79 Replacement Set of 3 C clamps 2135 80 Replacement Calibration LOOD Eke 2135 82 Replacement Carrying Case 2135 83 2140 53 2140 69 Replacement Safety Alligator Clip black Replacement Safety Alligator Clip green Order Accessories and Replacement Parts Directly Online Check our Storefront at www aemc com store for availability GroundFlex Adapter Model 6474 5 CHAPTER 2 GROUNDFLEX ADAPTER 2 1 Control Features GroundFlex Sensor SENSOR TURNS To Model 6472 Overload O SENSITIVITY For Use with the GroundFlex Adapter Ground Tester Model 6472 MODEL 6474 1 Inputs 1 through 4 for GroundFlex sensors Connector for connection lead to the Ground Tester Model 6472 OVERLOAD indicator SENSOR TURNS selector 1 2 3 or 4 SENSITIVITY selector x10 x1 or x1 10 oa N INPUT SELECTION 1 2 3 4 1 2 1 3 or 1 4 6 GroundFlex Adapter Model 6474 2 2 GroundFlex Sensor The GroundFlex sensors are placed around a conductor tower leg or pole and closed using a screw connector w
17. on WARNING If the GroundFlex Adapter Model 6474 is connected to the earth tester the earth potential connected to the terminals E X and ES Xv will also be present at the BNC connectors of the GroundFlex sensors and at the connecting cable between the adapter and tester Whenever any doubt exists about this earth potential the user should proceed to a voltage measurement using the S Y and ES Xv terminals of the tester 1 Set the 3 switches Inputs Turns and Sensitivity of the GroundFlex Adapter according to the connection made 2 Start the measurement by pressing the START STOP button IT sx1 2 1 8 Jf f I SEL f 6 E c x START STOP To display the measurement parameters press DISPLAY several times GroundFlex Adapter Model 6474 13 The device displays the following parameters Ree Us s and its frequency lsg U and its frequency l Act R Act R _ ss U Act U and its frequency ses and its frequency SEL To measure the resistances of electrodes H Z and S Y or if the resistance of the electrodes is too high start the measurement by a long press approx 2 sec of the START STOP button you will hear a 2nd beep R Rg U will be displayed HE 2 3 3 Other Measurements As explained in Step 4 on the previous page terminals ES Xv and E X must be connected to a metallic part of the tower above the GroundFlex sensor in ord
18. r damage to the instrument do not get water or other foreign agents into the case Turn the instrument OFF and disconnect the unit from all circuits before opening the case Use specified spare parts only 4 2 Cleaning A Disconnect the instrument from any source of electricity Use a soft cloth lightly moistened with soapy water Wipe with a moist cloth and then dry with a dry cloth Never use alcohol solvents or hydrocarbons GroundFlex Adapter Model 6474 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 container 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 contac
19. rements can be made at frequencies up to 5kHz On a single tower frequencies in the order of 5kHz do not always entail inductive effects but the current loops formed by the adjacent towers and the return chan nel through the ground may result in inductances that can be detected only at high frequencies An equivalent diagram of the components forming this circuit is as follows L L L Overhead earth wire Point of injection of the current Next pylon Pylon Next pylon to the left measured to the right A measurement in sweep mode SWEEP of an installation like this having 10 towers gives the following results assuming an earth resistance Ryon of 10Q for each tower and an inductance L of 550uH for the link via the overhead ground conductor at the tip of the towers Impedance of the towers Z ohi 16 ohm F Hz 0 1000 2000 3000 4000 5000 m Measurement of a tower earth impedance with GroundFlex sensors Conventional 4 pole measurement Measurement into the top of a tower iterative network impedance GroundFlex Adapter Model 6474 15 CHAPTER 3 SPECIFICATIONS 3 1 Electrical Measuring Method Voltage Current measurement with a rectangular AC signal Short Circuit Current gt 200mAac Noise Suppression gt 80 dB at frequencies differing by 20 or more from the test frequency Max Overload 250Vrms Max Value for amp R 100kQ
20. t 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 GroundFlex Adapter Model 6474 Limited Warranty The Model 6474 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 distributor from whom it was pur chased This warranty is void if the unit has been tampered with abused or if the defect is related to service not performed by AEMC Instruments For full and detailed warranty coverage please read the Warranty Coverage Information which is attached to the Warranty Registration Card if enclosed or is available at www aemc com Please keep the Warranty Coverage Information with your records What AEMC Instruments will do Ifa malfunction occurs within the one year period you ma
21. y 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 www aemc com 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 GroundFlex Adapter Model 6474 21 IE AEMC INSTRUMENTS 01 14 99 MAN 100326 v4 Chauvin Arnoux Inc d b a AEMC Instruments 15 Faraday Drive Dover NH 03820 USA Phone 603 749 6434 Fax 603 742 2346 www aemc com
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