ETCR 3000 Manual
Contents
1. wire resistance verification is specially designed as to 20Q grade which is more accurate on low value resistance measurement After connection of testing wire and the Tester connect the other end of all testing wires in short circuit as the following figure set FUNCTION rotary switch to the corresponding earth ground resistance measurement position press button to start verification During verification LED indicator flashes LCD displays and after verification LED displays wire resistance value and stores it For this time switch on it will automatically deduct the verified wire resistance value from earth ground resistance measurement It will not preserve the verified wire resistance value on switching off It needs re verification for next time switching on 6 Precision Measurement Please make sure testing wire plug has been totally inserted into testers corresponding interface and it may cause measurement value error for incomplete insert or poor contact As to low value earth ground resistance measurement it will be more accurate after wire resistance verification On measuring earthing voltage between E and C interface it will occur the maximum voltage about 50V Please do not impose voltage on measurement interface Please pay attention to avoiding electric shock accident On measuring earth ground resistance testing wires cannot be mixed around which shall b2. P Potential C Current electrode WSS Rx V I E Earth electrode 3 Maximum Operating Error Operating error B is an error obtained within the rated operating conditions and calculated with the intrinsic error A which is an error of the instrument used and the error E due to variations Ec o c 15XJ Ei E2 E3 E4 ESH E7 E8 Intrinsic error as Variation due to position change E2 Variation due to power supply voltage E3 Variation due to temperature change E4 Variation due to interference voltage change 7 E5 Variation due to contact electrode resistance E7 Variation due to system frequency change E8 Variation due to system voltage change VI Function Quick Check FUCTION rotary switch Up down arrow button Backlight button Backlight control START button Start measuring Maximum Minimum or Average value Switch on off Function shift Switch gear Data read numerical value settings MODE button mode Move cursor CLR button Clear data Delete data MEM button Data lock storage reading Alarm function start alarm critical value AL button settings VII Operation Methods 1 Switch On Off Rotate FUNCTION rotary switch to fulfill switch on and off When rotary Switch button displays OFF for shut off The Tester has no auto shut off function so please shut it off after usage in case of battery consumption saving 2 Battery Voltage Check After switch on i
3. this Tester to confirm earth electrode of commercial use power supply system This method is a simple method for measurement that does not use auxiliary earthing rod taking the earth electrode with the minimal existing earth ground resistance value as auxiliary earth electrode and connecting by two simple testing wires in which C P interfaces are in short circuit It can make use of metal pipes fire hydrants and other metal buried objects common earthing of commercial electric power system or lightning protection earth ground electrode and others to replace auxiliary earthing rods C P and pay attention to remove oxide layer on the connection point of the selected metal auxiliary earthing object when making measurement Earth ground resistance simple testing wire connection is as following figure and refer to precision measurement for other operations When select commercial use power supply system earth as auxiliary 1 AES a nan LiLILI AD N Feo Or P C Transformer E Secondary Primary Green Red E Pc A yy Measured earthing object Commercial earthing object Simple method for measurement of earth ground resistance its reading on Tester is the total value of earth ground resistance value of measured earthing object and that of commercial earthing object namely RE RX re In which RE is the Tester reading value RX is the earth ground resistance value of measu
4. ETGQIR nri EARTHRESISTANCE TESTER ETCR 3000 MANUAL ETCR Electronic Technology Company CONTENT Warning a tetti e eR et a a e ARR HERE RENS EESS 1 EXE pitgo ce Perle eu ES 3 Il Measuring Range and Accuracy sse 4 I Technical Specifications eese 4 PU Tester SUCCES Sanson i ire inc Benet Mano LONE OE buat daca 6 V Measuring Principle eene 7 VI Function Quick Check s aedqeiseiio grandi rere rel diu eapite mend 8 VII Operation Methods 5 notte a rn EROR eR e Poet rn ipto 8 Leo Switch On Off dde dates deer ete lee ies 8 2 Battery Voltage Check tue RIRs 8 3 Insert and Connection of Rods sse 8 4 Earthing Voltage Measurement esee 9 5 Wire Resistance Verification eeseeseeeeeeeeeenenrenne 10 6 Precision Measurement isses 10 4 Simple Measurement 5 nre eh ettet eere 11 8 Backlight Control 3 cen settee ot heise von aes Ure eit 13 9 Alarm Settings wisi cerei reti ether bete 13 10 Data LockK Storage ceeeseseeseeseeseeeeeen enne 13 11 Data Reading Deletion onini nnn kaas 13 12 Data Upload eie ert t eee 14 VIII Battery Replacement eene 14 IX AGCOeSSOLIGOS e cu CSRMCRHbP IUe e EN 15 A A Warning Thanks for your purchase of ETCR3000 Digital Earth Resistance Tester of our company For better use o
5. ation for a long time u For replacing battery please confirm testing wire has moved apart the meter and FUNCTION rotary switch is in OFF position u Please put the used batteries in appointed collection place u The Tester has no auto shut off function Please set FUNCTION rotary switch to OFF after usage u When the meter displays battery low voltage symbol H and you need to replace the battery in time u Ifthe Tester is not going to be used for a long period remove the battery u Pay attention to measuring range and usage environment stipulated for the Tester u This measuring device is only to be used disassembled adjusted and repaired by qualified personnel with authorization u When it may cause hazard by continuous use for the reason of the Tester itself it shall immediately stop using it and deposit it at once leaving it for disposal by authorized agency u For risk of danger icon in manual users must perform safety operations strictly in compliance with the manual content 2 I Introduction ETCR3000 Digital Earth Resistance Tester is specially designed and manufactured for field measurement adopting the latest digital and micro processing technology 3 pole or 2 pole method for earth resistance measurement with a unique function of wire resistance verification anti interference capability and the ability to adapt to the environment to ensure high precision high sta
6. bility and reliability for prolonged measure which is widely used in electric power telecommunications meteorology oil field construction lightning protection industrial electrical equipment and other earth ground resistance measurement ETCR3000 Digital Earth Resistance Tester has a unique function of wire resistance verification more accurate on measuring on site low value earth ground resistance which can avoid error caused by resistance change due to prolonged usage of testing wire avoid error caused by testing wire that is failed to be fully inserted into tester interface or by poor contact avoid error caused by users replacing or lengthening testing wires ETCR3000 Digital Earth Resistance Tester is composed of host machine monitoring software testing wires communication wires and others The large LCD display of host machine is with blue backlight and bar graph indicating that can be seen clearly At the same time it can store 400 sets of data fulfilling historical inquiry and online real time monitoring through monitoring software dynamic display with the maximum minimum and mean indicators with alarm settings and alarm indicator and with the functions like historical data access reading preservation report forms printing and so on 3 Il Measuring Range and Accuracy Measuring Measuring Functions Range Accuracy Resolution 0 010 200 1 rdg 3dgt 0 010 0 10 2000 Auxil
7. e measured separately Try to choose the spot with more water to deeply bury auxiliary earthing rods P and C in order to reduce auxiliary earth ground resistance and thus reduce indication error 10 There are 3 types of display modes for earth ground resistance measurement P Average Value Display H Maximum Display L Minimum Display The default display on booting is average value and press MODE button to switch display mode Precision measurement earth ground resistance adopts three wire connection After connection of auxiliary earthing rod and testing wires set FUNCITON rotary switch to 20000 press START button to start measuring During measurement LED indicator flashes LCD count down displays and after measurement LCD displays measured values If the display values are too small set it to 2000 200 in turn that is to choose the most appropriate gear position for measurement The value displayed on the most appropriate position is the measured earth ground resistance value After measurement press MODE button to check for the maximum minimum and average value in this measurement After measurement it may delete current measured values by pressing CLR button 7 Simple Measurement earth electrode it must use detector to confirm that is it the earth ground electrode for commercial use power supply system It is forbidden to use
8. e put the used batteries in appointed collection place 1 Switch off making sure that the Tester is under switch off state 2 Loosen the four screws on battery cover at the bottom of the Tester and open battery cover 3 Replace new battery pay attention to battery polarity and specification close battery cover and fasten screw 4 Switch on verification otherwise re operate 14 O O O a e e O O e Battery Cover oO Oo IX Accessories Tester 1 PC Tester Bag 1 PC Auxiliary Earthing Rod 2 PCS Monitoring Software Disk 1 Copy RS232 Communication Cable 1 PC Testing Wire 3 PCS Simple testing wire 2 PCS Zinc manganese dry battery 6 PCS R14S 1 5V Manual Warranty card Qualification Certificate 1 Copy 15 A Manufactured by ETCR Electronic Technology Company Address F 3F No 4 Pengshang Zhifu Road J iahe Baiyun District Guangzhou Guangdong China Post Code 510440 Tel 86 20 62199556 62199553 Fax 86 20 62199550 E mail info etcr cc Website www etcr cc
9. en 1 6m Auxiliary earthing rod 2 PCS 10mmx150mm Measuring Rate Voltage to ground about 3 times second earth ground resistance about 5 seconds time Measuring Times Over 5000 times Measuring 100 for one time on 200 range and take a pause for 25s Circuit Voltage Measuring voltage to ground measuring below AC 600V RS232 Interface Possess RS232 interface software supervision storage data can be uploaded to computer saved or printed Communication One piece of RS232 communication wire with length Wire 1 5m Data Storage a flash display FULL icon to indicate storage Data Hold Data hold function HOLD icon display Data Read Data read function READ icon display Overflow Exceeding measuring range overflow function OL Display icon display Alarm Function When measuring value exceeds alarm setting value there is Toot toot toot alarm hint When battery voltage decreases to about 7 8V Battery Voltage battery voltage low icon Kill display reminding to replace battery Backlight 25mA Max Power Consumption Standby 25mA Max Backlight shut off Measurement 70mA Max Backlight shut off Tester 1443g including battery Testing Wires 847g including simply testing wires Weight 9 Auxiliary earthing rod 468g 2 PCS Meter bag 915g Working Temperature amp 10 C 40 C below 80 rh Humidity Storage
10. f LCD displays low battery voltage icon E which indicates that battery voltage is low and please replace the battery in compliance with instructions Adequate battery power can ensure the accuracy of measurement 3 Insert and Connection of Rods Shown as the following figure stick the auxiliary earth rods P and C into the ground deeply They should be aligned at an interval of 5 10m from the earthed equipment under test Connect the green wire to the earthed equipment under test the yellow wire to the auxiliary earth rod P and the red wire to rod C from terminals E P and C of the instrument in order 8 Measured earth object Auxiliary earth ground rods Please try to insert auxiliary earthing rod into moist soil In case of dry Soil sand or gravel land it requires adding water to keep auxiliary Note earthing rod inserted place wet In case of concrete place it shall keep auxiliary earthing rod flat and add water and cover wet towels on earth ground rod before measurement 4 Earthing Voltage Measurement Please make sure testing wire plug has been totally inserted into testers corresponding interface and it may cause measurement value error for incomplete insert or poor contact The tester cannot be used for commercial power supply voltage measurement For special situation that needs to measure it can only use P E interface to connect for measurement It is not allowed to N measu
11. f the product please make sure to read this user manual in details to abide by the safety regulations and precautions strictly u The tester is conforming to IEC61010 on design production and test u Under any circumstance it shall pay special attention on safety in use of this tester u Please don t use high frequency signal generators like mobile phone and etc to avoid error during measuring u Payattention to words and symbols stick on the Tester u it shall make sure that tester and accessories are in good condition before use it can be used only when there is no damaged naked or broken part in testing wires or insulation layer u During measurement it is forbidden to touch bare conductors and circuit under measurement u Before measurement please confirm whether FUNCTION rotary switch has been set within the proper measuring range u Confirm that connector plug of lead has been inserted in the tester interface closely u Please don t impose over 600V A C or D C voltage on the part between testing end and interface Otherwise it may have damage on the tester u M Please don t measure in an inflammable place The flame sparkle maybe cause explosion u During usage of tester please stop using it when exposed metal is caused by broken enclosure or testing wires u M Please don t keep or store the tester in the spot with high temperature and moisture or condensation and under direct daylight radi
12. iary earth 0 10 Ba n ground resistance ESOS 10 20000 10002596 voltage 10 to ground 10V Earth Ground o Voltage 0 600V AC 1 rdg 3dgt 1V Remark 23 C 5 C below 75 rh Ill Technical Specifications Earth ground resistance measurement voltage to Function ground measurement low value resistance measurement DC 9V ZiMn dry battery R14S 1 5V 6 PCS Power Supply continuous standby for 300 hours Backlight Saas blue backlight suitable for use in dark Measuring Precise 3 pole measurement simple 2 pole Mode measurement M asurln Earth ground resistance rated current change pole M 9 method measurement current 3mA Max 820Hz ethod 1 SAT Voltage to ground average value rectification Data Mode Average value maximum minimum Wire Resistance Avoid error caused by testing wire that is failed to be fully inserted into tester interface or by poor contact or by users replacing or lengthening testing wires veritication making it more accurate for earth ground resistance measurement 4 digital super arge LCD display blue screen Display Mode backlight P 9 pay Measuring During measurement LED flash indicator LCD count indicator down display LCD Dimension 128mmx75mm Display field 124mmx67mm Dimension LxWxH 215mmx190mmx95mm Testing Wires Three wires each for Red 20m Yellow 10m and Green 5m 4 Simple Testing Wire 2 wires each for Red 1 6m and Gre
13. ll default backlight turn off for each startup 9 Alarm Settings After startup press button for a brief time to open or shut off alarm function press button for a long time about 3 seconds to enter alarm critical value settings press or to change current digital press nr button to move cursor and then press F button to store and exit When measurement value is larger than alarm critical settings value and it has opened alarm function the Tester will flash and display 9 icon and give out toot toot toot alarming sound 10 Data Lock Storage Startup or after measurement press EM button to lock current displayed data showing 0 WEN icon and automatically store with serial numbers If storage is full the Tester will display L icon Each group of stored data includes maximum minimum and average value And then press WE button to remove lock As shown in the left figure below the lock measurement data is 5 10 as the 19th group of data storage 20 10 30 Wee I Y ig Sadis LI n Or Co c Iram L J LR 11 Data Reading Deletion Startup or after measurement press EK button for a longer time over 13 3 seconds to enter data reading press Mor button to select reading data group number by step value 1 press Mor button constantly to select reading data group number by step value 10 press button to read the maximum minimum and ave
14. rage value of this group of data and then press button to exit from reading On reading if there is no storage data LCD will display see the above right figure Under data reading status press button to enter data deletion press k or to select no or yes selecting no and then pressing MEM button for not deleting return data reading status selecting yes and then pressing MEM button for deleting stored data and it will show as above right figure after deletion 12 Data Upload Make good connection of company with RS232 communication wire of the Tester switch on the Tester and run monitoring software and if the software displays that interface is open and the connection is successful then it can read the stored historical data upload to company and preserve Monitoring software has the function of online real time monitoring and historical inquiry dynamic display with the maximum minimum and average value indication with alarm value settings and alarm indicator and the function of historical data access reading preserve print and other functions VIII Battery Replacement Please don t replace battery in flammable spot Please don t replace battery during measurement Pay attention to battery polarity and specification and don t N mix use of new and used battery to avoid damage on Tester When the enclosure of Tester is wet please do not open battery cover Pleas
15. re commercial power voltage in the case of short circuit of P C interface Otherwise measuring voltage in the earthing circuit of cutout switch may cause cutout switch start On measuring earthing voltage please do not impose over 600V voltage on measurement connectors On measuring earthing voltage please do not touch measured bare conductors in case of electric shock After connecting of auxiliary earthing rod and testing wire shift FUNCTION rotary switch to EARTH VOLTAGE position LCD display voltage value to ground Please note the measured voltage shall NOT exceed 600V In general for measuring earthing voltage it is only to connect the testing wires corresponding to P E interface Before measuring earth ground resistance firstly please confirm voltage to ground must be lower than 10V Otherwise the measurement value may cause excessive error At that time firstly cut off power on measured earthing equipment and make resistance measurement after the earthing voltage is reduced Note 9 5 Wire Resistance Verification In order to improve precision and stability of field measurement of earth ground resistance avoid error due to wire resistance change due to prolonged usage of testing wires avoid error due to testing wire that is failed to be fully inserted into tester interface or by poor contact avoid error due to users replacing or lengthening testing wires and etc
16. red earthing object re is the earth ground resistance value of common earthing object like commercial use power system Then the earth ground resistance value of measured earthing object is RX RE re Adopting simple method for measurement of earth ground resistance shall try to select the earthing object with low value as the auxiliary earth ground electrode and thus the tester reading value can be more approaching to true value Please take precedence in selecting metal water pipes fire hydrants as auxiliary earth electrode when measuring and refer to the following figure for application P C Red pom Green nnn uuu P C P C ET g Bef peg Ser j YY re Yj Yj Yl Us RX Measured Earthing object re Auxiliary earth electrode such as metal water pipe construction lightening protection terminals 12 Simple method for measurement of earth ground resistance also needs to confirm that voltage value to ground must be lower than 10V If the voltage value is over 10V the measurement value of earth ground resistance may cause error and at that time it shall firstly cut off power on measured earthing equipment and make resistance measurement after the earthing voltage is decreased Note 8 Backlight Control After startup press button to turn on or off backlight The backlight function is suitable to dark spot It wi
17. temperature amp 20 C 60 C below 70 rh humidity 5 Overload Measuring earth ground resistance between each Protection interfaces of E P E C AC 280V 3 seconds Insulation wm E Besistancs Over 10MQ between circuit and enclosure it is 500V Withstanding AC 3700V rms Between circuit and enclosure Voltage Electromagnetic Ua Features Wireless frequency electromagnetic field IEC61010 1 1EC1010 2 31 1EC61557 1 5 Protection Type IEC60529 IP54 Pollution etc 2 CAT III 300V IV Tester Structure 1 LCD 2 Button area 3 Rotary switch for selecting function 4 RS232 interface 5 Interface of testing wires 6 C H interface Current electrode 7 P S interface Voltage electrode 8 E interface Earth electrode 9 Testing wires 10 Auxiliary earthing rod 11 Simple earthing wires 12 Testing probe 13 Safety alligator clip V Measuring Principle 1 Voltage to ground measurement adopts average value rectification method 2 Earth resistance measurement with fall of potential method AC constant current I 3mA Max 820Hz is applied between the measurement object E earth electrode and C current electrode and finding out the potential difference V between E and P potential electrode Rx V I Constant Current Generater qu I M Voltmeter V RxxI
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