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1. ETCR Earth Resistance Tester ETCR2000 ETCR2000A ETCR2000C ETCR2100 ETCR2100A ETCR2100C MANUAL Guangzhou ETCR Electronic Technology Co Ltd CONTENT IPAMONTION hiai aiii tle elec cette deeded ded eed eieledeloledaleledededed ell 1 Il Brief Introduction osossssresrrssrssrrsrsrrrsrerssrssrres rss eran en RR Rana aan 3 Ll SP GCHICANON aioin reiese dere dne neces neem een er Rs denied 5 1 Model Of SGrlC S mssssersssrssrrerreoresresrrsrrorenrr enes rr rr nens rer r on nn 5 2 Ranges and Accuracy of Measurement 5 3 Specifications u sssssssssserserserrerrssrrsrrererrsrrs a at eee 6 IV Structure of Meter icc athel Saa a aa ect rr ennen erna nan 7 V Liquid Crystal Display s esmserssrssrrsrsrrsorssrssrrsrresresrrsrsrs renen ronne nonan 8 MCD Sree iaiaeiaeiaa iaaeaie ieoa a Ea E EEn A na iate 8 2 Description of Special SYMbOIS sssserserrsrrsrrsorsrrsersrrnor nen 9 3 Examples Illustrated 10 VI Operating Method sat ucts eet re hae te te te a et ttt teases 11 WBOOU UDA ieee dra dras Sia ds dara delnininbsistssninkelekendks cdeinecteictedeeeaed 11 25 SIMO OWN PAPEETE AAAA 12 3 Resistance Measurement 13 4 Current Measurement ceccesceeseceeeeteseeeseetseeteeeens 14 5 Date Lock Release Storage esccescecseceeseeseeeeeteseeees 15 6 Data ACCESS drar keane ssd acai Red eed aE atiek dee fall 16 7
2. OL Q then press the trigger open jaws clamp the measured wire Before booting up the trigger should be pressed for a couple of times to ensure the jaws are well closed Boot must maintain clamp meter natural resting state don t flip Clamp don t be imposed outside force on the jaw otherwise can not guarantee the accuracy of measurement Press POWER Key to Boot first automated testing LCD m N S show all of its symbols Figure 1 Meanwhile the instrument auto calibration after boot displayed OL Q automatically enter the resistance measurement mode Figure 2 If there is no normal boot self calibration instrument will show Er symbol said boot error need to check the cause and reboot Figure 3 o E he FI BE D UL Er Ta 1 Figure 2 Figure 3 After Power On and Self Test if not appear OL Q but shows a large 5 B Bo resistance Figure 4 However when measured with the Figure 4 test ring still gives the correct result indicating Clamp measured only in the high value for example more than 100Q has large errors When measuring a small resistance retains the original Accuracy the user can rest assured use 2 Shutdown Press POWER Key to Shutdown 5 minutes after boot LCD display into the blinking state To reduce battery consumption blinking state for 30 seconds automatically shut down In the blinking state press POWER key to delay shutdown Clamp continue to work In the HOLD sta
3. on een replace the battery harness Departure of the a POWER button Re assemble the button mes contact of power Re plug or replace a plug Defect of PCB when current Defect of circuit consumption is about 100mA component or more at 6V of battery voltage Replace the PCB o ag capacity of Replace the batteries atter Indicating ERROR ontact eurten TW Clean the surface Display Err big z error results or Poor enclose of jaw Trigger the clamp several times and then re boot results unstable Defect of circuit sompni Replace the PCB Study the manual and follow it Replace the battery when Low eras capacity of battery mark is displayed on sii the LCD Poor enclose of Jaw Trigger the clamp several times indicating jaw open a i symbol on LCD and then re boot a of Contact surface of jaw is Clean the surface f sistales polluted by dust oil etc Without self calibration pete follow the ae before test con uct measurement after self calibration finished f Defect o Check above points first If component there is no problem replace the P PCB and do re adjustment circuit 27 Poor contact of LCD Re plug the LCD connect plug ao connection wire or replace the plug LCD Indication SITO Defect of LCD Replace the LCD chip of segment arithmetic Insufficient itv of point unit and so b a ONF CAPACI Replace the batteries on attery Defect of circuit Replace the
4. Alarm Settings oossossssssrsorserssrrnssrrereerrsrrsnrrernernsrrrrrsren nn n rn rna 16 8 Access to Alarm Critical Value 17 Ose Cleat D TE i re pc E EEE 17 VII Measurement Principle sssesseeeeseesieerireeirrerrrerirerrrrrsrnnnes 18 1 Principle of Resistance MeasureMeNt s ssssmssesssossssssosrnnnsn 18 2 Principle of Current Measurement 18 VIII Measurement Method of Earth Resistance cc ee 19 1 Multi Point Grounding System sssserserserserrsrrsrrsrrssrrsrrnr rna 19 2 Limited Point Grounding System s 20 3 Single Point Grounding System 21 IX Bill Of L GOING sasse vaan enn dd odds od dr rd dnr rr de ANDRES ANNANS SNES 24 X Parts List and Assembly DetailS ssssssssssorsssrsrrssrssersserssersnnrnn rna 25 1TParts Listed rie eae Ga ea eae iE SELESELE TEDI SRA 25 2 Assembly Details omnsvsssssssssssssssssrsrsserssrreserssnr sanne nr rn r nanna 26 XE Troubleshooting irnn nanain 27 I Attention Thank you for purchasing this pincers earth tester from ETCR Electronic Technology Company In order to make better use of the product please be certain To read this user manual carefully To comply with the operating cautions presented in this manual Under any circumstances use the Meter should pay special attention to safety Pay attention to the measurement range of the Meter and the using environment provided Pay attention to the text labeled on the panel and back plane of the
5. and coil can generate a induction _ yh current l4 The Meter will measure l4 and the measured current can be obtained by the following formula susli Where n is the turn ratio of the secondary side vs primary side 18 VIII Measurement Method of Earth Resistance 1 Multi Point Grounding System As for the multi point grounding system such as electricity transmission tower grounding system grounding cable communications systems certain buildings etc They usually pass the overhead ground wire cable shielding layer connected to form a grounding system As the Meter is in the above measurement its equivalent electric circuit is shown in the figure below Where R is the target grounding resistance Ro is the equivalent resistance of the other entire tower grounding resistances paralleled Although strictly on the theoretical grounding because of the existence of so called mutual resistance Ro is not the usual parallel value in the sense of electrical engineering slightly higher than its IEC parallel output value But because a tower grounding hemisphere was much smaller than the distance between the towers and with a great number of locations after all Ro is much smaller than R Therefore it can be justified to assume Ro 0 from an engineering perspective In this way the resistance we 19 measured should be R1 Times of comparing tests in different environments and different occasions wi
6. Meter Before booting up the trigger should be pressed for 1 2 times to ensure the jaws are well closed At Boot time DO NOT press the trigger nor clamp any wire Before the auto inspection is completed and the OL Q symbols are showed the measured objects cannot be clamped on The jaw planes contact must be maintained clean and should not be polished with corrosive and rough materials Avoid any impact onto this Meter especially the Jaw contact surface This Meter will have some buzzing sound in measurement 1 10 11 12 13 14 process and it is normal The measurement current of the wire should not exceed the upper limit of the Meter Please take out the batteries in the case of the Meter being idle for a long time The dismantling calibration and maintenance the Meter shall be operated by the authorized staff If the continuing use of it would be dangerous the Meter should be stopped using immediately and immediately sealed for the treatment by the authorized agencies The contents in this user manual marked with are limited to C ll Brief Introduction This instrument was designed by technical department of ETCR Electronic Technology Company Its performance is mainly reflected in u 6 or 2 te Breakthrough in self test the boot a long time to wait start immediately into the test Breakthrough relay self test mode using the most advanced processing algorithms and digital integ
7. PCB component HOLD button Depart a Incapable to hold from the position Rezassemble th button reading Defect of circuit Replace the PCB component 28 A Manufactured by ETCR Electronic Technology Company Address F 3F No 4 Pengshang Zhifu Road Jiahe Baiyun District Guangzhou Guangdong China Post Code 510440 Tel 86 20 62199556 62199554 Fax 86 20 62199550 E mail info etcr cc Website www etcr cc
8. Value In the HOLD state need to press HOLD key to exit the HOLD state then continue measurement In the MR state need to press MEM key to exit the MR state then continue to measurement In setting Alarm Critical Value state need to press the POWER key or press the AL key for 3 seconds exit Alarm Critical Value state then continue to measurement In the current test mode press Q key to switch to resistance test mode 4 Current Measurement After the booting auto inspection is completed the Meter automatically enter the resistance measurement mode Upon showing OL Q press A key and the Meter enter the current measurement mode showing AC 0 00mA see Figure 7 At this point press the trigger and open the jaws clamp the target wire reading to get TUT Fam ae A the current value LLLI LI LUL It shows OL A indicating a T that the measured current value exceeded the upper limit of Meter see Figure 8 Flashing display symbols go with intermittent beep beep beep sound indicating the measured current exceeds the current of Alarm Critical Value In the HOLD state need to press HOLD key to exit the HOLD state then continue measurement 14 In the MR state need to press MEM key to exit the MR state then continue to measurement In setting Alarm Critical Value state need to press the POWE
9. current measurement Press down AL key for 3 sec you can access to check the alarm critical value which would flashes in high digit The value accessed was set in the last time And again press down AL key for 3 sec or POWER key to quit from the access state and return to the measuring state i As indicated in Figure 15 the alarm critical n 2 De value of resistance set in the last time is 200 9 Clear Data Figure 15 In the data access model press MEM POWER automatism clear all the stored data After clearing display show in Figure 12 The data can t be restore after clear Note is limited to C 7 VII Measurement Principle 1 Principle of Resistance Measurement The basic principle of ETCR in the measurement of resistance is to measure the loop resistance as shown in the figure below The jaw part of the Meter is comprised of voltage coil and current coil The voltage coil provides excitation signal and will induce a potential E on the measured loop Under the effects of the potential E the current can generate on the measured loop The Meter will measure E amp I and the measured resistance R can be obtained by the following formula R I 2 Principle of Current Measurement The basic principle of C in the measurement of current is the same with that of the measurement of resistance as shown in the figure below The AC current on the measured measured Conductor wire through the current magnetic loop
10. notebook computer to carry out solutions In principle in addition to ignoring the mutual resistance this method does not have the measurement error caused by neglecting Ro However users need to pay attention to that in response to the number of the grounding bodies mutually linked in your grounding system it is necessary to measure the same number of the testing values for calculating of the program not more or less And the program would output the same number of grounding resistance values 3 Single Point Grounding System From the measuring principle ETCR series Meter can only 21 measure the loop resistance and the single point grounding is not measured However users will be able to use a testing line very near to the earth electrode of the grounding system to artificially create a loop for testing The following presented is two kinds of methods for the single point grounding measurement by use of the Meter These two methods can be applied to the occasions beyond the reach of the traditional voltage current testing methods 1 Two Point Method As shown in the figure below in the vicinity of the measured grounding body Ra find an independent grounding body of better grounding state Re for example near a water pipe or a building Ra and Rs line will connect to each other using a single testing line ions G RB 7 F Z YU As the resistance value measured by the Meter is the value of the series resistan
11. R key or press the AL key for 3 seconds exit Alarm Critical Value state then continue to measurement In the resistance test model press A key to switch to current test model 5 Date Lock Release Storage In test model press HOLD key to Lock currently displayed value and HOLD symbol At the same time this lock values as a set of data followed by auto ID and store and then press HOLD key to cancel the lock HOLD symbol disappeared can continue to measure Loop operation can store 99 sets of data If the memory is full blinking display IMEM symbol Figure 9 Lock measured resistance 0 016Q at the same time as the first 01 sets of data storage As indicated in Figure 10 lock the measured current 278mA and a 99 uu I e 18 How How Figure 9 Figure 10 save it as data unit No 99 gi nn 5 Q And the memory is full now blinking display MEM symbol In the Date Access Model press MEM key to exit then can lock and storage the data In setting Alarm Critical Value state need to press the POWER key or press the AL key for 3 seconds exit Alarm Critical Value state then can lock and storage the data Shutdown and then boot up don t lose stored data 15 6 Data Access Press MEM key to enter Data Access Model the default display stored in the first 01 Units of data shown in Figure 11 Then the right arrow keys up read the Fi
12. attery type 4 x1 5V alkaline LR6 AA battery Low battery indication is displayed Internal consumption lt 50mA Auto Power off after 5 minutes of idleness Display 4 LCD sign decimal point and backlight Memory size 99 Units of Reading Environment Temperature amp Relative Humidity Working 10 C 55 C 10 RH 90 RH Storage 20 C 60 C below 70 RH Range shift Full range automatic shifting External magnetic field lt 40A m External electric field lt 1V m Data upload interface RS232 Optional 6 IV Structure of Meter 5 lt 6 lt a 104 Et 5 Q 1 Long Pincers Jaw 65mmx32mm 2 Round Pincer Jaw 932mm 3 Trigger to control opening and closing of jaw 4 HOLD Key lock Release display Storage 5 POWER Key Boot Up Shutdown Quit Clear Data 6 MEM Key Data Access Clear Data 7 AL Alarm Function Key Alarm Open Turn Off Alarm Critical Value Setting 8 Resistance Measure Switch Key O Right Arrow Key 9 Current Measure Switch Key A Left Arrow Key 10 Liquid Crystal Display LCD Note is limited to C V Liquid Crystal Display 1 LCD Screen 14 A BEENS wll LO 7 oc IEC kon Noise 11 10 9 8 1 Alarm Symbol 2 Symbol of low battery amp voltage 3 Symbol of full data storage 4 Symbol of data access 5 2 Digital No Of Data Storage Unit 6 Current un
13. ce from the testing line and two grounding resistances Rr Ra Re RL Where Rr is the resistance value measured with the Meter R is the resistance value of the testing line Meter can measure out the resistance value by connecting the test lines with both ends 22 So if the measurement value of the Meter is smaller than the allowable value of the grounding resistance then the two grounding bodies are qualified for grounding resistance 2 Three Point Method As shown in the figure below in the vicinity of the measured grounding body Ra find two independent grounding bodies of better grounding state Rg and Re First link Raand Rs with a test line use the Meter to get the first reading R4 Second have Rg and Rc linked up as shown in the following figure Use the Meter to get the second reading Ro Third have Rc and Ralinked up as shown in the following figure Use the Meter to get the third reading Rs 3 RB 7 RA In the above three steps the reading measured in each step is the value of the two series grounding resistance In this way we can easily calculate the value of each grounding resistance From R1 RA RB R2 RB RC R3 RC RA We get RA R1 R3 R2 2 This is the grounding resistance value of the grounding body Ra To facilitate the memory of the above formula these three grounding bodies scan be viewed as a triangle then the measured resistance is equivalent to the val
14. gure 11 Figure 12 data stored press the left arrow key scroll down to the data stored If not store data display shown in Figure 12 In setting Alarm Critical Value state need to press the POWER key or press the AL key for 3 seconds exit Alarm Critical Value state then press MEM key to enter data storage model 7 Alarm Settings In the test model press AL key to turn on or shutdown alarm function In test model press AL key for 3 seconds then enter to set alarm critical value function temporality the highest digit flashing first set a maximum bit shown in Figure 13 Figure 14 Press AL key to switch to the low number in the current digit flashing press the left right arrow keys to change the 0 1 9 figures after the number finished setting press the AL key for 3 seconds to confirm the current set alarm critical value when set the alarm function successful opening alarm function then automatically return to measurement mode If the load bigger than the alarm critical meter will be flashing an 16 Flash alarm symbol also Figen issued intermittent beep beep beep g Jo 4 g g sound tawas FEAA Setting process press POWER key to exit Alarm Critical Value setting function return to measurement status does not change the previous settings In data access model press MEM key to exit then setting Alarm Critical Value 8 Access to Alarm Critical Value Press AL key to enter the mode of resistance or
15. it 7 Resistance unit 8 Noise signal 9 Data lock symbol 10 Symbol of an open jaw 11 Symbol of DC 12 Metrication decimal point 13 4 digital LCD figures display 14 Symbol of AC 2 Description of Special Symbols Note is limited to C 1 AC Symbol of an open jaw As a jaw is in the open state the symbol shows At this point trigger may be artificially pressed or the jaws have been seriously polluted and can no longer continue to measure 2 Er Boot error symbol May be pressing trigger when boot or jaw has been opened 3 E Symbol of low battery amp voltage when the battery voltage is lower than 5 3V the symbol shows At this time it cannot guarantee accuracy of the measurements Batteries should be replaced 4 OL Q symbol indicates that the measured resistance has exceeded the upper limit of the Meter 5 L0 01Q symbol indicates that the measured resistance has exceeded the lower limit of the Meter 6 OL A symbol indicates that the measured current has exceeded the upper limit of the Meter 7 Alarm symbol when the measured value is greater than the critical value of alarm setting the symbol flashes and the meter issued by intermittent beep beep beep sound 8 IMEM Symbol of full data storage memory is full of data units of 99 and can no longer continue to store data IMEM symbol flashes 9 MR Symbol of access t
16. o data to display in an access to data also including the number of data 9 0 NOISE signal when the symbol flashes in the measurement of grounding resistance at a greater interference current in the loop At this time it cannot guarantee accuracy of the measurements 3 Examples Illustrated Note is limited to C 1 2 3 4 5 6 Jaw is in open state and cannot measure Boot error instructions Er Error Measured loop resistance is less than 0 010 Measured loop resistance is 5 10 Measured loop resistance is 2 10 Lock the current measurement value 2 10 Auto storage as 08 set data Access to the stored data of Unit No 26 Measured loop resistance is 0 0280 rn gt r c C3 ny un ny meb UU Ce Bo 7 Alarm function activated the measured current exceeded 10 the critical value of alarm setting Low battery amp voltage is displayed At this time it not guarantee the accuracy of the measurements Measured current is 8 40A Lock the current value displayed Store the current value as the data Unit No 37 8 Access to the stored data unit No 8 Measured resistance is 300 This data is measured in a lot of signals interference VI Operating Method 1 Boot up A Boot DO NOT press the trigger don t open jaws nor clamp any wire Boot complete show
17. ration technology a fully intelligent Break the old product to heavy issues more in line with characteristics of handheld devices New design panel operation with 6 buttons better performance An increase of sound and light alarm beep beep beep alarm sound Increase the interference signal recognition indicator Improved anti jamming capability and test stability Stored data 99 Units Wider range 0 010 12000 Lower power consumption Maximum operating current not exceeding 50mA ETCR series of Pincers Earth Tester is widely used in the grounding resistance measurement of the power telecommunications meteorology oilfield construction and the E industrial and electrical equipment ETCR series of Pincers Earth Tester in the measurement of a grounding system with loop current does not require breaking down the grounding wire and need no auxiliary electrode It is safe fast and simple in use ETCR series of Pincers Earth Tester can measure out the faults beyond the reach of the traditional methods and can be applied in the occasions not in the range of the traditional methods ETCR series of Pincers Earth Tester can measure the integrated value of the grounding body resistance and the grounding lead resistance ETCR series of Pincers Earth Tester is equipped with a long jaw as indicated in the figure below A long jaw is particularly suitable for the occasion of grounding with the flat steel In addi
18. te need to press HOLD key to exit the HOLD state then press POWER key to shut down In setting Alarm Critical Value state need to press the 12 POWER key or press the AL key for 3 seconds exit Alarm Critical Value state then press POWER key to shut down 3 Resistance Measurement After the booting auto inspection is completed it shows OL Q and will be able to proceed with resistance measurement At this point press the trigger and open the jaws clamp the target loop reading to get the resistance value If the user thinks it necessary the test can be done with the ring as shown in the following figure 5 Its show value should be consistent with the normal value on the test ring 5 1 The normal value on the test ring is the value at a temperature of 20 C It is normal to find the difference of numerical 1 word between the show value and the nominal value For instance If the nominal value of test ring is 5 10 it would be normal showing 5 00 or 5 20 It shows OL indicating that the measured resistance value exceeded Inns the upper limit of Meter see Figure 2 L ULU IQ It shows L0 010 indicating that the Figure 6 measured resistance value exceeded the lower limit of Meter see Figure 6 Flashing display symbols go with intermittent beep beep beep sound indicating the measured resistance 13 exceeds the resistance of Alarm Critical
19. th the traditional method proved that the above assumption is entirely reasonable 2 Limited Point Grounding System This is also quite common For example in some towers five towers are linked with each other through overhead ground wire Besides the grounding of some of the buildings is not an independent grounding grid but several grounding bodies connected with each other through the wire Under such circumstances the above Ro regarded as 0 will yield more error on the results of the measurement Due to the same reasons mentioned above we may ignore the impact of the mutual resistance and the equivalent resistance of the grounding resistance paralleled is calculated by the usual sense Thus for the grounding system of N N is smaller but larger than 2 grounding bodies it can offer N equations Rit Rir 1 1 T pAr A 1 Ry R3 Rn 1 Rt pe tt R R Ry 20 ed p Ber Fiar R R Ry Where R1 R2 Rn are grounding resistances of N grounding bodies Rats Rot Rur are the resistances measured with the Meter in the different grounding branches It is nonlinear equations with N unknown numbers and N equations It indeed has a definite solution but it is very difficult to solve the issue artificially even impossible when N is larger Therefore you re expected to buy the Limited Point Grounding System Solution software produced by this Company Users can use the office computer or
20. tion C Pincers Earth Tester is also able to measure the leakage current and the neutral current in the grounding system lll Specification 1 Model of Series Jaw Range of Range of 3 g g Storage Alarm Size Resistance Current Function Function mm Q A ETCR2000 0 01 1200 suns V ETCR2000A 0 01 200 ums V Note V means available 2 Ranges and Accuracy of Measurement Mode Range Resolution Accuracy 50 00 99 50 1 5 0 50 Resistance 2000 3950 sa mts mw 50 400 5900 100 10 100 6000 8800 20 200 300 9000 12000 sn os t300 veume True RMS 2 596 1 AD Resistance Measurement Frequency gt 1KHz Measured Current Frequency 50Hz 60Hz Setting Range of Resistance Alarm Critical Value 10 1990 Setting Range of Current Alarm Critical Value 1mA 499mA 5 3 Specifications Instrument safety IEC EN61010 1 IEC EN6010 2 032 Insulation double insulation Pollution degree class II Overvoltage category CAT III 150V to ground Max 20A Degrees of protection IP30 Group III equipment as per EN 60529 Ed 92 IK04 as per EN 50102 Ed 95 Dimensions LxW H Long elliptic jaw 285mmx90mmx66mm 11x4x3 inches Round jaw 260mmx90mmx66mm 10 4x3 inches Span of Jaw Long elliptic jaw 35mm round jaw 32mm Weight including batteries Long elliptic jaw 1160g Round jaw 1120g B
21. ue of the resistance values of the adjacent edges plus or minus resistance value of the opposite sides and divided by 2 As the reference points the grounding resistance values of the other two grounding bodies are RB R1 RA RC R3 RA IX Bill of Loading Earth Tester 1 piece Test Loop 1 piece Carrying Case 1 piece User s Manual 1 piece 24 X Parts List and Assembly Details 1 Parts List NO NAME Part Quantity PCS Remark Screws of battery 1 DSO1 1 M3X8 cover 2 AA alkaline batteries DS02 4 3 Battery cover DS03 1 4 Upper shell DS04 1 5 Subjacent shell DS 05 1 6 Tension spring DS 06 2 7 Clamp DS 07 1 8 LCD DS 08 1 9 HOLD key DS09 1 10 LCD cover DS10 1 11 PCB DS11 1 Connect screws of 12 DS12 3 ST2 9X10 shells 13 Clamp screws DS13 2 ST2 9X25 14 Shaft DS14 1 15 Push button DS15 5 16 Screws for PCB fix DS16 2 ST2 2X6 17 Screws for LCD fix DS17 2 ST2 2X6 25 2 Assembly Details 26 XI Trouble shooting Install batteries in correct Faulty battery polarity Solarity Insufficient capacity of Replace the batteries batter Poor contact of battery Replace the battery contacts contacts Wrong battery type Replace with right type The instrument A breal i hati Make a continuity test of test cannot be buttoned h reak mm a Salley lead If there is no continuity

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