Instruction Manual
Contents
1. at the same time Install batteries in the orientation as shown inside the battery compartment observing correct polarity When the battery voltage warning mark is displayed on the upper left of the LCD replace the batteries Note that the display blanks and mark is not displayed if the batteries are completely exhausted 1 Take off the instrument when a measurement is being performed 2 Turn off the instrument when it is at turn on 3 Loosen the Battery cover fixing screw on the back of the instrument Then remove the Battery cover 4 Install new batteries R6P or LR6 4pcs for each in the orientation as shown inside the battery compartment observing correct polarity 5 Put the Battery cover in place and tighten the screw 10 Service If the instrument should fail to operate correctly return it to your local distributor from who you purchased this instrument stating the exact nature of the fault For service the resistor for operation check MODEL8304 shall be attached and returned together with the instrument Before returning the instrument make sure that a Operating instructions have been followed b Battery has been checked Remember the more information written about the fault the quicker it will be serviced2. function follow the procedure below 1 Turn on the instrument by pressing the Power button with the Data hold button pressed Then release the Power button The Data hold button shall be being pressed down 2 The instrument is turned on PUFF is displayed on the LCD for about 1 second Now the auto power off function is disabled To enable the auto power off function again turn off and on the instrument without pressing the Data hold button 8 2 Data hold function This is a function to freeze the indicated value on the display When the Data hold button is pressed once the indicated value on the LCD is held even though current under test varies The J mark is shown at the upper right the LCD To exit the Data hold mode press the Data hold button again FJ mark disappears lt gt When the Auto power off function works while the instrument is in the Data hold mode data hold is cancelled 8 3 Buzzer function This is a function to give audible warning to user when the measured earth resistance is 10Q or less To enable the buzzer function press the Function button at the earth resistance function at least 2 seconds 2 mark is displayed at the lower left on the LCD Buzzer sounds when the measured earth resistance is 10Q or less To disable the buzzer function press the Function button again Then the 2 mark disappears 8 4 Backlight function This is a function to view the indicati
3. INSTRUCTION MANUAL DIGITAL EARTH CLAMP TESTER MODEL 4200 KYORITSU ELECTRICAL INSTRUMENTS WORKS LTD Contents le Sy cose pees ie cee 1 i FONO 3 3 Specification 4 A Instrument layout ERRA 6 5 Measurement principle 7 6 Preparation for 9 s Measuring Method sssrinin inenen E i i 10 7 1 Normal measurement Of 14 7 2 Measurement of Balance leakage current 11 7 3 Measurement of earth resistance 12 8 Olher TUNCUONS ecri e 14 8 1 Auto power off function casiiionstecuatacinsiivaneydudtanancGuaudserinansstueadsenice 14 6 2 Data hold TON CU Ol Mss 14 8 3 Buzzer function ic 14 8 4 Backlight TUNCUON ninn s 14 8 6 Memory 15 9 Battery replacement 16 10 Service 17 1 Safety Warnings This instrument has been designed manufactured and tested according to IEC 61010 Safety requirements for Electronic Measuring apparatus and delivered in the best condition after passed the inspection This instruction manual contains warnings and safety procedures which have to b
4. ales for AC measurement The scales are however actually calibrated in terms of the effective value of a sine wave though the clamp meter is responding to the average value The calibration is done with a conversion factor of 1 111 for sine wave which is found by dividing the effective value by the average value These instruments are therefore in error if the input voltage or current has some other shape than sine wave O CF Crest Factor is found by dividing the peak value by the effective value Examples Sine wave CF 1 414 Square wave with a 1 9 duty ratio CF 3 Ax1 111 A 400 A A A 11 1 l Reference Conversion Reading errors Wavetora Effective value Average value ctor for average Crest factor Vrms Vavg Verde Va sensing CF g instrument 1 2 A ZA 2 2 2 0 v2 1 414 0 707 0 637 1 111 1 1 2 1 444 41D 1 x 100 4 Instrument layout Name of each parts and buttons Transformer jaw Trigger Backlight button Switches on off the backlight 4 Function button Switches ACA Earth resistance function Memory mode button Check the measured value with each data number 6 Data hold button Holds the indicated value Release the held value KIVORITSU an 7 Power button Turns on off the instrument Display unit LCD 9 Cursor button UP Selects data number to save the measured value or to view the O E measured data
5. anations in the instruction manual This symbol indicates that the instrument is protected by double or reinforced insulation 4 This symbol indicates that this instrument can clamp on bare conductors 7 This symbol indicates DANGER eae oe measurement on a circuit in which the electrical potential exceeds 300V Do not make measurement when thunder is rumbling Stop measurement and take off the instrument from the object under test Do not attempt to make measurement in the presence of flammable gasses Otherwise the use of the instrument may cause sparking which can lead to an explosion To avoid electrical shock by touching the equipment under test or its surroundings be sure to wear insulated protective gear Transformer jaws are made of metal and their tips are not completely insulated Be especially careful about the possible shorting where the equipment under test has exposed metal parts Never attempt to use the instrument if its surface or your hand are wet Do not exceed the maximum allowable input of any measuring range Do not measure a current over 30A Transformer jaws may heat to cause a fire or deformation of molding parts which will degrade insulation When clamping the conductors on which over 30A flowing is displayed on the LCD stop measurement immediately and take off the retained from the conductor under test Never open the Battery cover during a measurement When the transfor
6. arrier 2 Features This instrument is a digital clamp on earth resistance tester and it is used in multi earthed systems Can measure the earth resistance by simply clamping around the earthed wires This instrument also equips AC current function to measure current up to 30A same to our traditional leakage clamp meters Wide measuring range Auto ranging Earth resistance 12000 Min resolution 0 010 AC current Max 30A Min resolution 0 1mA Noise check function A function to detect current which effects on an earth resistance measurement and display the NOISE mark on the LCD True RMS Accurate true RMS readings of AC current with distorted waveform Auto power off function A function to prevent the instrument from being left turned on and conserve battery power Data hold function A function to freeze the measured value on the display Buzzer function A function to give audible warning to the user when the measurement result is 10Q or less Backlight function A function to facilitate working at dimly lit areas Memory function A function to save and display the measurement result Designed to following safety standard IEC61010 1 2001 CAT IV 300V Pollution degree 2 IEC61010 2 032 2002 This instrument is protected by double or reinforced insulation 2 3 Specification Measuring range and accuracy 0 010 0 00 20 990 1 5 0 050 16 0 99 90 2 050 Eart
7. can be opened and closed it is impossible to eliminate the interference of external magnetic field completely If there are something which generating large magnetic field at a nearby site current value can be displayed cannot be displayed Before clamping on the conductor For such a case please use the instrument at a location far from the thing which generating magnetic field Following are the typical things generating magnetic field Conductor fed large current Motor Equipment which has magnet Integrating wattmeter 7 1 Normal measurement of current Press the Function button and select the ACA function Confirm the displayed unit is the MEM mark is not displayed at the upper left on the LCD the trigger to open the Transformer jaws and close them over one conductor only Measured current value is displayed on the LCD Earth leakage current that flows through an earthed wire can be measured by this method 7 2 Measurement of Balance leakage current Press the Function button and select the ACA function Confirm the displayed unit is mA the MEM mark is not displayed at the upper left on the LCD Clamp onto all conductors except an earthed wire Measured current value is displayed on the LCD Single phase 2 wire system Three phase 3 wire system In 3 wire system with neutral In 4
8. deformation of molding parts which will degrade insulation When clamping the conductors on which over 30A flowing is displayed on the LCD stop measurement immediately and take off the instrument from the conductor under test CAUTION Take sufficient care not to apply shock vibration or excessive force to the jaw tips Otherwise precisely adjusted Transformer jaws will be damaged This instrument performs self calibration for about 3 seconds when it is turned on 9 is displayed on the LCD Do not clamp on conductor or open the jaws in this period Otherwise inaccurate measurement may occur When foreign substances are stuck in the jaw tips or they cannot properly engage the Transformer jaws do not fully close In such a case do not release the jaw trigger abruptly or attempt to close the Transformer jaws by applying external force Make sure that the jaws close by themselves after removing the foreign substance or making them free to move The size of a conductor can be tested is 30mm in diameter Accurate measurement cannot be made on a conductor larger than this because the Transformer jaws cannot fully close Never attempt to apply excessive force to close the jaws When measuring large current the Transformer jaws may buzz This has no effect on the instrument s performance or safety Sensitive Transformer jaws are used for this instrument Because of the characteristics of Transformer jaws which
9. e observed to ensure safe operation of the instrument and maintain it in a safe condition Thus these operating instructions have to be read prior to using the instrument Z WARNING Read through and understand the instructions contained in this manual before using the instrument Keep the manual at hand to enable quick reference whenever necessary Be sure to use the instrument only in its intended applications The instrument is to be used only in its intended applications e Understand and follow all the safety instructions contained in the manual It is essential that the above instructions are adhered to Failure to follow the above instructions may cause injury instrument damage and or damage to equipment under test O The symbol indicated on the instrument means that the user must refer to the related parts in the manual for safe operation of the instrument It is essential to read the instructions wherever the Z symbol appears in the manual DANGER reserved for conditions and actions that are likely to Cause serious or fatal injury Z WARNING is reserved for conditions and actions that can cause serious or fatal injury CAUTION is reserved for conditions and actions that can cause injury instrument damage O Following symbols are used on the instrument Attention should be paid to each symbol to ensure your safety LN This symbol indicates that the user must refer to the expl
10. h resistance 2009 19 Auto ranging 160 3990 5 450 12 12000 400 5990 10 100 joa eomma ouvert AGA TOOMA sine wave 50Hz 60H2 Auto ranging Crest factor 2 5 Accuracy at sine wave 1 50 2 60 2 peak value shall not exceed 60 In the following cases zero will be displayed on the LCD At 200 range of Earth resistance function 0 040 or less A range shifts to upper range when the input exceeds 105 of the selected range and shifts to the lower range when the input falls under 80 of the lower range Operating system Earth resistance function Constant voltage injection Current detection Frequency Approx 2400Hz Dual Integration AC current function Successive Approximation True RMS Display Liquid crystal display with a maximum count of 2099 Over range indication OL is displayed when input exceeds the upper limit of a measuring range Response time Earth resistance function Approx 7 seconds AC current function Approx 2 seconds Sample rate Approx once per second Location for use Altitude 2000m or less In door out door use protection degree IP40 Temperature amp 23 5C Relative humidity 85 or less humidity range no condensation i Operating temperature amp 10 40 C Relative humidity 85 or less humidity range no condensation Storage temperature amp 20C 60C Relative humidity 85 or less humidity range withou
11. in memory OOD Om Cursor button DOWN OOOO Selects data number to save the measured value or to view the measured data in memory Save button Saves the measured value 5 Fel Marks to be displayed on the LCD Displayed when saving the measured value or when Data number instrument is in memory mode 1 to 100 738 Displayed when batteries are exhausted open Displayed at Earth resistance function when es Transformer jaws are not properly closed NOISE Displayed at Earth resistance function when current or noise which effect on the measured value presents D Displayed when data hold function is activated Displayed when ACA function is selected 1 Displayed when instrument is in continuity mode at Measured value Unit Earth resistance function 5 Measurement principle This instrument can measure the earth resistance to earth in multi earthed system Let s regard earth resistance under test as Rx and the other earth resistances as Ri R2 Rn 5 Of these earth resistances R2 Rn be considered that they are connected in parallel And can be regarded as a combined resistance Rs The Rs can be regarded small enough against Rx since a combined resistance consists of several resistances Following is an equivalent circuit diagram of this circuit By applying the Voltage V to the circuit from the Transformer jaw CT1 current is shall be flo
12. mer jaws are worn to the wear line see the figure below stop the use of the instrument Z WARNING Never attempt to make any measurement if any abnormal conditions such as a broken cover or exposed metal parts are present on the instrument Do not install substitute parts or make any modification to the instrument Return the instrument to your local distributor from who you purchased this instrument for repair or re calibration Do not try to replace the batteries if the surface of the instrument is wet Always turn off the instrument before opening the Battery cover for battery replacement Always be sure to keep your fingers and hands behind the Safety barrier see the figure below Otherwise user may be exposed to the danger of electrical shock N CAUTION Press the Function button and confirm the appropriate function is selected before starting a measurement expose the instrument to the direct sun high temperatures and humidity or dew Press the Power button and turn off the instrument after use When the instrument will not be in use for a long period place it in storage after removing the batteries Use a cloth dipped in water or neutral detergent for cleaning the instrument Do not use abrasives or solvents Take sufficient care not to apply shock such as drop Otherwise precisely adjusted Transformer jaws will be damaged Be careful not to pinch some foreign substances with the Transformer jaw tips Safety b
13. on press the Memory mode button Then the MEM mark is displayed on the LCD Pressing the Cursor button 7 changes the data number displayed on the LCD and the measurement result in memory is displayed accordingly lt gt disable the memory mode press the Memory mode button again or press the Function button Then MEM mark disappears When is displayed with a data number it means no measurement result is saved Clearing the measurement results in memory To clear the measurement result press the Save button with the Memory mode button pressed The message is displayed on the LCD for about 2 seconds and the measurement result on the selected data number is cleared Then the indication on the LCD becomes lt gt Follow the procedure below oS the all measurement results 1 Press the Power button when the instrument is off while the Memory mode button and the Save button are being pressed Then release the Power button only 2 Instrument is turned Al and are displayed on the LCD for about 2 sec Now all the stored data are deleted 9 Battery replacement WARNING In order to avoid possible shock hazard take off the instrument from the conductor under test and turn off the instrument before trying to replace the batteries Z CAUTION Do not mix new and old batteries Never use the different kinds of batteries
14. ons on the LCD in dimly lit areas To switch on the backlight press the Backlight button while the instrument turned on To switch off the backlight press the Backlight button again lt gt Backlight is automatically switched off in about 1 minute to conserve battery power 8 5 Memory function This is a function to save and display the measurement results Saving the measurement results 1 Any data number between 1 and 100 be selected with the Cursor button a or at ACA or Earth resistance function and save the measurement results lt gt When the Cursor button is being pressed the number switches quickly 2 To save the measurement result being displayed on the LCD press the Save button Then the result is saved to the selected data number MEM mark is displayed for about 1 second lt gt After saving the data data number automatically switches to the next available data number present data number 1 and the next measured value can be saved to it The data number becomes 1 after the measurement result is saved to the data number 100 lt gt When the new measurement result is saved to the data number on which the previous measurement result is saved previous data will be overwritten lt gt When saving a data while the data hold function is activated the readings which is being held on the LCD will be saved Recalling the measurement results in memory To activate the memory functi
15. pper left on the LCD Press the trigger to open the Transformer jaws and close them over the earthed wire under test Measured resistance value is displayed on the LCD lt Noise check function gt At the Earth resistance function the M83 mark is displayed on the LCD the following cases which may effect on a measurement The current flowing on the earthed wire is exceeding the following value Range of Earth resistance function Allowable current value 200 200 Q 12000 400mA or less The current flowing on the earthed wire includes a harmonic wave which effects on the measurement lt Jaws check function gt The mark is displayed when the Transformer jaws of the instrument are not properly closed Measurement is being stopped while this mark is displayed on the LCD Earth resistance measurement of a pole earthing electrode Earthing conductor Earth resistance measurement of an earthing electrode in a lightning protection system Lightning Earthing 8 Other functions 8 1 Auto power off function This is a function to prevent the instrument from being left turned on and conserve battery power The instrument automatically turns off about 10 minutes after the last button operation To return to the normal mode press the Power button again and turns the instrument lt gt The buzzer sounds before the instrument turns off lt gt To disable the auto power off
16. splayed the LCD after turning on the instrument Follow the procedure described in 9 Battery replacement and replace the batteries with new one when any of following symptoms is noted Otherwise accurate measurement and proper saving cannot be ensured si mark is being displayed indications are faint and difficult to read nothing is displayed on the LCD 2 Verify the correct measurement of earth resistance Clamp on the supplied resistor for operation check MODEL8304 as shown below and verify that the Transformer jaw and the circuit works correctly When the indicated value is within the range described below they are operating correctly If the indicated value is greatly exceeding the accuracy send the instrument for repair according to 10 Service For repair the resistor for operation check MODEL8304 shall be attached and returned together with the instrument Resistor for operation check 1Q loop 100 loop Resistor for operation check Allowable range 9 7 Measuring method DANGER Never make measurement on a circuit in which the electrical potential exceeds AC300V Transformer jaws are made of metal and their tips are not completely insulated Be especially careful about the possible shorting where the equipment under test has exposed metal parts Never make measurement with the Battery cover removed Do not measure a current over 30A Transformer jaws may heat to cause a fire or
17. t batteries no condensation Power source DC6V R6P_ size AA manganese battery 4pcs or size AA alkaline battery x 4pcs Current consumption Approx 50mA max 100mA Measurement time Approx 12 hours when R6P is used Approx 24 hours when LR6 is used Auto power off Turns power off about 10 minutes after the last button operation 4 Applicable standards Electrostatic discharge immunity Withstand voltage Insulation resistance Conductor size Dimension Weight Accessories lt Supplemental remarks gt O Effective value RMS IEC61010 1 2001 CAT IV 300V Pollution degree2 IEC61010 2 032 2002 IEC61326 2000 EMC standard Performance criteria B AC5320Vrms 5 seconds Between the Transformer jaws fitted parts and Case enclosure except for jaws SOM Q more at 1000V Between the Transformer jaws fitted parts and Case enclosure except for jaws Approx 32mm in diameter max 246 L x 120 W x 54 D mm Approx 780g including batteries Battery R6P 4pcs Instruction manual 1pce Resistor for operation check 1pce MODEL8304 Hard case MODEL9128 Most alternating currents and voltages are expressed in effective values which are also referred to as RMS Root Mean Square values The effective value is the square root of the average of square of alternating current or voltage values Many clamp meters using a conventional rectifying circuit have RMS sc
18. wed flowed corresponding to the earth resistance R can be put out by the calculation after detecting the current with the other Transformer jaw CT2 In this case R displayed in this instrument can be regarded as Rx because Rs can be regarded small enough against Rx ae R Rx Rs 1 Rx Rs 1 CT2 i 1 PE E ER Z CAUTION This instrument cannot support the measurement for the locations with following earth systems Single earth that is not connected to other earths Lightning rod etc Earth on which a current over 2A is measured at AC current function of this instrument Earth with larger earth resistance than an earth resistance of testing Earth with earth resistance over 1200Q Precision measurement shall be performed with our Earth resistance tester M4102A or M4105A for the measurement of single earthed wire Measurement example using M4102A N Earthed electrode Auxiliary earth spikes under test 6 Preparation for measurement CAUTION This instrument performs self calibration for about 3 seconds when it is turned on LAL is displayed on the LCD Do not clamp on to any conductor open the jaws in this period Otherwise inaccurate measurement may occur 1 Check the battery voltage When nothing is displayed on the LCD press the power button and turn on the instrument Battery voltage is enough when indication is clear and the mark is not di
19. wire system with neutral clamp onto all 3 wires clamp onto all 4 wires 44 7 3 Measurement of earth resistance CAUTION Follow the procedure described in 7 1 Normal measurement of current and measure the current flowing on the earthed wire prior to the measurement of earth resistance In case that the 93 mark is displayed at the upper right of the LCD it means that a great error would be included in the measured result To avoid such inaccurate measurement reduce the current flowing on the earthed wire by turning off the device from which current is applied to the earthed line under test Measurement cannot be made for the earth without multi earth system or when the earth resistance under test is smaller than the other earth resistances To avoid inaccurate reading may be taken never make a measurement for the same earth system with many of this instruments mark may be displayed during a measurement of earth resistance It indicates that the jaws of the instrument are not properly closed Measurement is being stopped while this mark is displayed on the LCD Close the Transformer jaws properly to re start the measurement The response time at Earth resistance function is about 7 sec Take reading after it becomes stable Measurement procedure Press the Function button and select the Earth resistance function Confirm the displayed unit is MEM is not displayed at the u
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