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Kyoritsu Electrical Instruments Works KEW6024PV, Instruction Manual

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Kyoritsu Electrical Instruments Works KEW6024PV Instruction Manual Download Page 63

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Memo 
 

 

Contents 

 
1. Safety warnings ................................................................................... 1 
2.  Features ...............................................................................................  7 
3.  Specifications .......................................................................................  9 
4. Name of parts .................................................................................... 14 
5.  Accessories ........................................................................................  19 
6. Preparations for measurement .......................................................... 21 

6-1 Battery voltage check ................................................................... 21 
6-2 Attaching metal tip/ adapter to test leads ...................................... 21 

7. Insulation resistance measurement on PV systems .......................... 23 

7-1 Measuring method ........................................................................ 25 

8. Insulation resistance measurement ................................................... 31 

8-1 Measuring method ........................................................................ 32 

9. Earth resistance measurement .......................................................... 36 

9-1 Measurement principle ................................................................. 36 
9-2 Simplified measurement ............................................................... 37 
9-3 Precision measurement (with MODEL7228A test leads) .............. 40 

10. Voltage measurement ...................................................................... 44 

10-1 Measuring method ...................................................................... 44 

11. Alarm function .................................................................................. 46 

11-1 Alarm function ............................................................................. 46 
11-2 How to set alarm ......................................................................... 46 
11-3 Display example – Alarm setting ................................................. 48 

  

Summary of Contents for KEW6024PV

Page 1: ...uction manual PV insulation earth tester KEW6024PV 06 19 92 2290A DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations ...

Page 2: ... resistance measurement on PV systems 23 7 1 Measuring method 25 8 Insulation resistance measurement 31 8 1 Measuring method 32 9 Earth resistance measurement 36 9 1 Measurement principle 36 9 2 Simplified measurement 37 9 3 Precision measurement with MODEL7228A test leads 40 10 Voltage measurement 44 10 1 Measuring method 44 11 Alarm function 46 11 1 Alarm function 46 11 2 How to set alarm 46 11 ...

Page 3: ...How to delete 53 13 System clock settings 54 13 1 How to adjust 54 14 Data communication function 56 14 1 How to transfer data 56 15 Battery replacement 57 16 Shoulder strap and soft case attachment 58 16 1 How to attach shoulder strap 58 16 2 How to attach soft case 59 ...

Page 4: ...d to enable quick reference whenever necessary The instrument is to be used only in its intended applications 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 and or damage to the instrument The symbol indicated on the instrument means that the user must ref...

Page 5: ...ted to an AC electrical outlet by a power cord CAT III Primary electrical circuits of the equipment connected directly to the distribution panel and feeders from the distribution panel to outlets CAT IV The circuit from the service drop to the service entrance and to the power meter and primary overcurrent protection device distribution panel DANGER Never make measurements on a circuit in which ea...

Page 6: ...le input of any measuring range Do not press TEST button when connecting test leads to the instrument Keep the battery compartment cover screwed and closed during a measurement Do not touch the circuit under test while measuring insulation resistance or right after measurement to avoid electrical shock Voltage test leads Always use the test leads supplied with this instrument Connect the test lead...

Page 7: ... notes Never attempt to make any measurements if the test leads and or the instrument has any structural abnormality such as a crack or exposed metal parts Do not install substitute parts or make any modifications to the instrument Return the instrument to your local KYORITSU distributor for repair or re calibration in case of suspected faulty operation Do not try to replace batteries if the surfa...

Page 8: ...n use for a long period Do not expose the instrument to direct sunlight high temperature humidity or dew Use a damp cloth with neutral detergent or water for cleaning the instrument Do not use abrasives or solvents Wipe the instrument with a soft cloth if it is wet and store it after it s dry Carefully read and observe the precautions with a mark of DANGER WARNING CAUTION and Note described in eac...

Page 9: ... the distribution panel to outlets CATIV The circuit from the service drop to the service entrance and to the power meter and primary over current protection device distribution panel Instrument with double or reinforced insulation User must refer to the explanations in the instruction manual Earth Never use on a circuit with voltages higher than 600V ...

Page 10: ...klight facilitating working in dimly lit areas The light automatically turns off if any button isn t pressed for two minutes The instrument automatically turns off if any button isn t pressed for 10 minutes This feature is disabled during a continuous measurement Test probe with a remote control switch is supplied as standard accessory Soft case instrument is accessible while in use Strap belt all...

Page 11: ...ange Special features for measurement on PV systems Measured voltages are displayed in stand by mode Elapsed time after starting a measurement is displayed with the measured values Auto discharge with voltage display and also with the measured value Earth resistance measurement Measured earth voltage is displayed in stand by mode The LED lights up if the measured voltage is relatively high In prec...

Page 12: ...MΩ range 15 0 208 9 MΩ 2000MΩ range 159 2099 MΩ Open voltage DC Rated measurement voltage x 1 1 2 times Output voltage is to be divided by the current limiting resistor of 1 MΩ at Earth terminal and the resistor at the connected terminal Short circuit current 1 5 mA or less Measuring range 1 51 200 0 MΩ 1 51 1000 MΩ Accuracy 1 5 rdg 5dgt Measuring range 0 00 1 50 MΩ 200 1 2000 MΩ 0 00 1 50 MΩ 1001...

Page 13: ...hown in the following table LINE EARTH when selecting a voltage function C H E when selecting a simplified measurement function P S E when selecting a precision measurement function Earth resistance measurement Precision simplified Range 3 range auto Measuring range Display range Accuracy 1 20Ω range 0 00 2000 Ω 0 00 20 99 Ω 3 rdg 0 1 Ω 200Ω range 16 0 209 9 Ω 3 rdg 3dgt 2000Ω range 160 2099 Ω Mea...

Page 14: ...2 times Short circuit current 1 5 mA or less Rated current Lower limit resistance 1 0 1 2 mA 0 25 MΩ 0 5 MΩ 1 MΩ 1st effective measuring range Measuring range MΩ 1 51 100 0 1 51 200 0 1 51 1000 Mid value 50 MΩ 50 MΩ 50 MΩ Accuracy Intrinsic error 1 5 rdg 5dgt 2nd effective measuring range Measuring range MΩ 1 20 1 50 100 1 2000 1 20 1 50 200 1 2000 1 20 1 50 1001 2000 Accuracy Intrinsic error 5 rd...

Page 15: ...sation humidity range In a range of 40ºC to 50ºC RH70 or less Storage temperature 20ºC to 60ºC RH75 or less no condensation Withstand voltage 5160 V AC 50 60Hz 5 sec e r u s o l c n e d n a t i u c r i c l a c i r t c e l e n e e w t e B Insulation resistance 50MΩ or more 1000 V DC e r u s o l c n e d n a t i u c r i c l a c i r t c e l e n e e w t e B Auto power off Turns off the instrument autom...

Page 16: ...e temperature 10ºC to 50ºC E1 is not applicable since this is a digital instrument The measuring range to keep operating uncertainty of 30 is the same as the 1st effective measuring range Operating uncertainty in earth resistance measurements IEC61557 5 Formula A 1 15 E E E E A Intrinsic uncertainty E1 Not applicable E2 Variation due to changing the Battery voltage till the battery indicator becom...

Page 17: ...times Insulation resistance measurement 250V 0 25 MΩ Approx 2500 times 500V 0 5 MΩ 1000V 1 MΩ Approx 1500 times Earth measurement Simplified Precision 10 Ω Approx 2500 times 4 Name of parts 1 Test lead WARNING Barrier is a part providing protection against electrical shock and ensuring the minimum required air and creepage distances Always keep your fingers behind the barrier during a measurement ...

Page 18: ... 15 15 2 Panel side 3 Terminal part Connector block Fig 4 2 Fig 4 1 ...

Page 19: ...strument A long press 1 sec or longer Back button Returns to the previous step at setting Down cursor button Decreases setting values Up cursor button Increases setting values Setup button Configures each setting LED for live circuit warning Alerts the circuit to be tested is live Button for insulation resistance measurement Selects insulation resistance measurement for PV system or for the other ...

Page 20: ...the positive display limit e g In earth measurements 2099Ω may be displayed It indicates that the measured value is exceeding 2099 Ω Indicates that a measurement completes and the result is being held and displayed on the LCD Flashes to provide live circuit warning for PV insulation insulation earth measurement This mark also flashes during an insulation resistance measurement Indicates that alarm...

Page 21: ...nce is too high Precision measurement Symbols for voltage earth voltage measurement Indicates AC or DC Unit Appears to indicate negative voltage is measured Indicates Over range status the measured value is exceeding the negative display limit e g The LCD may show 1049V In this case the measured value is under 1049 V Symbols for memory function Indicates the running operation Appears together with...

Page 22: ...1 pce Fig 5 2 Fig 5 3 These metal tips are for MODEL7196B 5 Black cord with banana plugs at both ends Fig 5 4 6 Alligator clip 7 Flat test bar 6 5 g i F 5 5 g i F 8 L shaped probe MODEL7243A 9 Hook type prod MODEL8016 Optional accessory Optional accessory Attached and used with MODEL7196B 8 5 g i F Fig 5 7 Changeable metal tips are available for MODEL7196B 4 A set of test leads with alligator clip...

Page 23: ...3 Carrying bag MODEL8200 03 MODEL9142 Fig 5 11 Fig 5 12 Other accessories 1 Carrying case MODEL9156 2 Shoulder strap with cord belt MODEL9155 3 Six AA alkaline batteries LR6 4 Instruction manual 6 USB adapter 7 CD KEW Report Fig 5 13 Fig 5 14 8 Instruction manual for MODEL8212 USB USB 10 Precision measurement cord set MODEL7245A Optional accessory 5 USB adapter KEW Report software MODEL8212 USB ...

Page 24: ... ments If empty indicator is displayed battery voltage is below the lower limit of the operating voltage In such a condition accuracy of the measured result isn t guaranteed When powering on the instrument with completely exhausted batteries empty battery indicator blinks in the LCD and also buzzer sounds approx 2 sec Use of AA alkaline battery LR6 is recommended Use of other batteries may cause i...

Page 25: ...ips rated for the measurement category Fig 6 1 2 For MODEL7244A Either of the following adapters can be attached to MODEL7244A 1 Alligator clip 2 Flat test bar How to attach Firmly insert and connect the adapter to the end of the cord with banana plugs at both ends Fig 6 2 DANGER To avoid getting electrical shocks ensure that test leads are disconnected from the instrument when replacing the metal...

Page 26: ...resistance function for PV system to measure the insulation resistance of PV array The instrument may give bleep during an insulation resistance measure ment however this is not a malfunction The earth measuring terminal outputs positive voltage and the line measuring terminal negative voltage Connect the earth cord to the earth ground terminal at measure ment It is recommended to connect the posi...

Page 27: ...t before starting insulation measurement Do not attempt to make measurements on a live conductor Otherwise it may damage the instrument Before starting insulation resistance measurement on PV array turn off the main switch and disconnect the array from the solar inverter Do not make measurement if any malfunction of PV array is suspected Select and use ordinary insulation resistance measurement fu...

Page 28: ...and earth terminals of PV array If the measured resistance value is low do not perform further measurement so as not to damage solar cells and modules 1 Press the PV button to select insulation resistance function for PV system The LCD shows SOLA about one second and the PV LED lights up 2 Connect the test leads as Fig 7 1 shows MODEL7196B to LINE terminal and MODEL7244A to EARTH terminal Fig 7 1 ...

Page 29: ...escribed on the next page and open circuit the circuit to be measured CAUTION This is just an example and the PV system connection may be different from actual one Always check the actual connection before starting measurement Fig 7 2 ...

Page 30: ...voltage that is connected to the circuit under test 5 If N terminals of strings in circuit under test are earthed disconnect them before starting measurement 4 Confirm the voltage rating of the circuit under test and press the button for rated measurement voltage to select the voltage applied A long press 2 sec or longer is required to select 1000V It is possible to disable 1000V range How to disa...

Page 31: ...where the voltage is positive dc and less than the rated measurement voltage Note Select the insulation resis tance function for PVsystems DANGER Never make measurementson acircuit in which earth potentialsof 600 V or higher exist CAUTION Alwaysturn the breaker of the measurement line The instrument cannot make measurement on circuits energized with AC voltage or to which negative DCvoltage isbein...

Page 32: ...til the value is stable The LCD shows 2099MΩ when the measured result exceeds the display range over range Display example 7 Press TEST or remote control switch again to stop a continuous measurement PV Insulation resistance Measurement principle Blink Measured value Elapsed time Fig 7 4 Influences of voltage and current generated by PV system are subtracted Flow of current I2 stops when static ca...

Page 33: ...ED red backlight and blinking mark Warning example 9 Press the POWER button to power off the instrument when measurement completes and then disconnect the test leads from the instrument DANGER Never touch the circuit under test immediately after measurement Capacitances stored in the circuit may cause electric shock Leave the test leads connected to the circuit and do not touch the circuit until t...

Page 34: ... terminal negative voltage Connect the earth cord to the earth ground terminal at measurement It is recommended to connect the positive side to the earth side when measuring insulation resistance against ground or when a part of the object under test is earthed Such connection is known to be more suitable for insulation testing since insulation resistance values measured with the positive side con...

Page 35: ...V button two seconds or longer It is possible to disable 1000V range How to disable enable 1000V range 1 Keep the 1000V button held down and power on the instrument 2 Wait for about 5 seconds with the 1000V button held down to disable enable 1000V range How to confirm 1000V is surely disabled The LCD shows no when pressing 1000V button 4 Connect the earth test lead MODEL7244A to the earth terminal...

Page 36: ...fore starting insulation measurement Do not attempt to make measurements on a live conductor Otherwise it may damage the instrument Fig 8 2 Fig 8 3 Fig 8 4 The LCD shows 2099M Ω when the measured result exceeds the display range over range Display example Earth terminal Black Red Power Load OFF Switch Principle of insulation resistance measurement ...

Page 37: ...ng example Pressing the BACK button during discharging allows you to monitor the discharge voltage In this case the measured insulation value will be cleared and go off from the screen 6 Press the POWER button and power off the instrument when measure ment completes and then disconnect the test leads from the instrument DANGER Never touch the circuit under test immediately after measurement Capaci...

Page 38: ...ed by dividing the rated voltage by rated current ie in case that the rated voltage is 500 V the lower limit of the insulation resistance is found as follows Divide 500 V by 1mA equals 0 5 MΩ That is insulation resistance of 0 5 MΩ or more is required to provide the rated voltage to the instrument Rated voltage 250 V 500 V 1000 V Lower limit of insulation resistance to supply rated measurement cur...

Page 39: ...easuring earth voltage do not apply voltage greater than 600 V between measuring terminals When measuring earth resistance do not apply voltage between measuring terminals 9 1 Measurement principle This instrument makes earth resistance measurement with fall of potential method which is a method to obtain earth resistance value Rx by applying AC constant current I between the measurement object E ...

Page 40: ...power supply and an earth terminal of a building can be used with two pole method E and P 1 Connect the test leads as Fig 9 2 shows MODEL7196B to LINE C terminal and MODEL7244A to EARTH E terminal Fig 9 2 2 Wiring Make connection as shown in the following figure Connection using common earth Connection using socket outlet of commercial power supply Fig 9 3 Fig 9 4 Red Black E Black C Red Power Loa...

Page 41: ...d on the LCD In the connection state of Fig 9 3 or 9 4 check the earth voltage displayed on the LCD The earth voltage displayed in this state is the voltage between C H and E terminals Display example Fig 9 5 Make sure that the voltage is less than 10 V When the display reads 10 V or more a warning LED as shown below lights up The warning LED lights up at 5 V or more for an earth voltage of 400 Hz...

Page 42: ...result exceeds the display range over range 5 Simplified measurement value Two pole method is used for simplified measurement In this method earth resistance value re of earth electrode connected to terminal C H see Fig 9 3 is added to true earth resistance value Rx and shown as an indicated value Re Re Rx re If the re is known beforehand true earth resistance value Rx is calculated as follows Rx ...

Page 43: ... order Fig 9 8 MODEL7228A with cord reel Fig 9 9 Fig 9 10 Note Make sure to stick the auxiliary earth spikes in the moist part of the soil Give enough water where the spikes have to be stuck into the dry stony or sandy part of the earth so that it may become moist In case of concrete lay the auxiliary earth spike down and water it or put a wet cloth etc on the spike when making measurement Use MOD...

Page 44: ... Make sure that the voltage is less than 10 V When the display reads 10 V or more the warning LED as shown below lights up The warning LED lights up at 5 V or more for an earth voltage of 400 Hz Red LED lights up Fig 9 12 Excessive errors in earth resistance measurement may be caused in the condition that warning LED for high earth voltage is lighting up To avoid this make measurement after reduci...

Page 45: ...Auxiliary earth resistance If the auxiliary earth resistance is within the allowable range and doesn t affect measurement the LED AUX OK lights up Green LED lights up Fig 9 14 If the auxiliary resistance of auxiliary spick P or C is too high to make measurement the display reads RP_H or RC_H Recheck the connection of test leads and the earth resistance of auxiliary earth spike When RP is too high ...

Page 46: ... it may result in inaccurate measurement Make sure to stick the auxiliary earth spike P S and C H into the moist part of the earth carefully and ensure sufficient connections between the respective connections If auxiliary earth resistance is higher than 100 times of the upper limit value of the selected measurement range the measured result may be displayed on the next higher range e g When the m...

Page 47: ...e VOLTS button to select voltage measurement function 2 Connect the test leads as Fig 10 1 shows MODEL7196B to LINE terminal and MODEL7244A to EARTH terminal Fig 10 1 3 Connect the black test lead to the earth side of the circuit under test and the red remote probe to the line side Fig 10 2 Red Black Select voltage function Never press CAUTION TEST button CAUTION Never press remote button ...

Page 48: ...arity sign is displayed to the left of the reading where the line probe side is charged with negative polarity When the measured voltage is less than 5 V any of AC DC or polarity symbols don t appear When the measured result exceeds the display range over range the LCD reads as follows AC voltage 629 V Positive DC voltage 1049 V Negative DC voltage 1049 V Fig 10 3 Display example Measured value Cu...

Page 49: ...500 1000 When is selected at alarm setting buzzer sounds and blinking mark and the pre set reference value are displayed when the measured value exceeds the reference value When is selected at setting buzzer sounds and blinking mark and the pre set reference value are displayed when the measured value is less than the reference value This function is disabled if OFF is selected Default setting OFF...

Page 50: ...n entering a desired value 7 Press SET UP Alarm setting completes Fig 11 3 Fig 11 4 Fig 11 5 Fig 11 6 Fig 11 7 10 Repeat step 8 and 9 to select a desired number for the second and third digit 6 Press cursor button ᇞ or 佇 to set decimal place 8 Press cursor button ᇞ or 佇 to move the blinking cursor onto the first digit 11 Setting completes when the last digit has been set 9 Press SET UP Blink ...

Page 51: ...nce value When is selected at setting buzzer sounds and blinking mark and the pre set reference value are displayed when the measured value is less than the reference value Indications remain the same at PV insulation measurement Buzzer sounds when the measured value is greater or lower than the pre set reference value Alarm mark and the pre set reference value are displayed while alarm function i...

Page 52: ...en the data saved is recorded automatically Note Note the measured time and date Data transfer to PC is required to view the saved time and date Data no Select and allocate a data no to save a result Number will automatically be given in sequence 0 999 Site no 1 Specify and allocate a desired site no to a measured data E g Give a specific no to the building where the measure ment is done 0 99 Site...

Page 53: ... no 1 and 2 will be the same as the last time and Data no will be the previous number plus one 2 Press SAVE In case of voltage measurement press SAVE during a measurement 1 Confirm the measured value is held right after a measurement 3 Press cursor button or to set Site no 1 Blink Blink Site no 1 4 Press SET UP Site no 2 9 Quick save Fig 12 1 Fig 12 2 Fig 12 3 5 Press cursor button or to set Site ...

Page 54: ...r 佇 to set Data no The displayed number is the previous number plus one Blink Data save completes 2 sec later Returns to the state at the beginning Measured result is held and displayed 9 Quick save Fig 12 4 Data no Fig 12 5 Fig 12 6 8 Press SET UP ...

Page 55: ... with earth voltage alert mark is also displayed on the LCD Stand by state 1 Stand by or data hold state 2 Press RECALL 4 Press SET UP to check the Site no 1 and 2 Data no Site no 2 Site no 1 The warning mark appears when recalling data for which earth voltage alert was given Fig 12 7 Fig 12 8 Fig 12 9 3 Saved data is displayed Press cursor button or to select a desired Data no Fig 12 10 ...

Page 56: ...will then be displayed Hold down 2 sec 3 Press cursor button or to select the Data no of the data you wish to delete 4 Press SET UP 5 DEL icon blinks Blink 6 Press SET UP Data has been deleted To delete all the saved data select ALL which comes before the number 0 and after the number 999 Fig 12 14 Fig 12 13 Fig 12 12 Fig 12 11 Long press of 2 sec Delete ...

Page 57: ...13 1 How to adjust The following figures show how to set the system clock The clock setting is allowed only on stand by screen for voltage measurement Pressing the BACK button in setting process returns to the previous step 1 Press SET UP 2 First set year Press cursor button ᇞ or 佇 to adjust the second digit from the right 3 Press SET UP Blink Fig 13 1 Fig 13 2 Fig 13 3 4 Press cursor button ᇞ or ...

Page 58: ...ting year Previously adjusted month and day will be displayed at the lower left corner 5 Press SET UP Month Fig 13 4 7 Press SET UP Day Blink Fig 13 5 8 Now adjust day Returns to the top of year setting 9 Press SET UP Fig 13 6 Blink 11 Press SET UP 12 Adjust minute according to the same procedure for adjusting year Fig 13 7 Blink Minute Hour 13 Press SET UP Settings complete Fig 13 8 Blink ...

Page 59: ...he plug of MODEL8212 USB to the USB port on the PC 3 Disconnect the test leads from the instrument and then connect MODEL8212 USB as follows 4 Power on the instrument Selecting any function is just all right 5 Run KEW Report and click Download command Then the data will be transferred from the instrument to PC For further details please refer to the instruction manual for 8212USB and HELP for KEW ...

Page 60: ...ust be closed and screwed before starting a measurement Otherwise electrical shock hazard may be caused CAUTION Do not mix new and old batteries or mix different types of batteries Install batteries in correct polarity as marked inside 1 Power off the instrument and then disconnect the test leads 2 Loosen two screws which are fixing the battery compartment cover and remove the cover 3 Replace all ...

Page 61: ...he side belt through the slider as Fig 16 1 shows for two side belts 3 Attach the shoulder strap to the side belt as Fig 16 3 shows Fig 16 1 2 Attach the side belt as Fig 16 2 shows to both sides Fig 16 3 Adjust the slider to alter the length of strap Side belt Slider Shoulder strap Fig 16 2 ...

Page 62: ...quence 1 Run the side belts though the slits on the soft case and put the instrument into the soft case 2 Place the partition box to the bottom of the soft case Test leads can be stored in this box Fig 16 4 Instrument Partition box Soft case Cord belt Test leads Tie the test leads to the shoulder strap Shoulder strap Fig 16 5 Complete ...

Page 63: ... resistance measurement on PV systems 23 7 1 Measuring method 25 8 Insulation resistance measurement 31 8 1 Measuring method 32 9 Earth resistance measurement 36 9 1 Measurement principle 36 9 2 Simplified measurement 37 9 3 Precision measurement with MODEL7228A test leads 40 10 Voltage measurement 44 10 1 Measuring method 44 11 Alarm function 46 11 1 Alarm function 46 11 2 How to set alarm 46 11 ...

Page 64: ...uction manual PV insulation earth tester KEW6024PV 06 19 92 2290A DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations ...

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