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1. 100 V etms 30 V 15V etum 300 V etms 300 V Uz 150 tms 1000 V 5 On the range 3V Square wave signal positive on one side 5 15 V f const not 163 84 Hz or integral multiple 17 Reference conditions Ambient temperature 23 C 2 Relative humidity 45 55 RH Frequency of measured 45Hz 65 Hz quantity Waveform of the measured sinusoidal quantity Battery voltage 8V 0 1 V Influence Quantities and Variations Influence Range of Influence Measured Variation quantity quantity Measuring range RISH Clamp 1000A 300A Ve 2 Digit 1 Battery KX 7 9 V 400 voltage 8 1 V 10 0V 300 3000 4 Digit 3 kQ 30 3 Digit A 6 Digit F Hz 1 Digit Relative A EN humidity ays z 1 x intrinsic error Meter off lt MD 1 Digit MIN MAX V A 2 Digit 1 After the Bb symbol is displayed Influence Range of Influence Measuring quantity ranges Noise quantity max 1000 V V gt 120 dB Common mode 30V 70 dB Noise quantity max 1000 V interference mE 300 V 70 dB vollage 50 Hz 60 Hz sinusoidal 1000 V 60 dB Normal Noise quantity V mode 7 value of the measuring range at a time T interference may 1000 V 50 Hz 60 Hz iis iiim voltage Sinusoidal Noise quantity max 1000 V y gt 110 dB 18 Variation 1 Measured
2. of rdg digits Range of Influence quantity Measuring range Influence quantity 30 300 mV Oooo O 300 7 0 1542 9 216 3MO Sm A Frequency gt 65 Hz 400 Hz 3 300V 2043 MM EXILE measured Gest 123 The permissible crest factor CF of the AC quantity to be measured function of the displayed value Wave form Voltage measurement Current measurement of the measured quantity 9 gt 0 D 500V 1000V 0 1000 20000 30000 Digit 1 With Temperature Error data apply per 10K change in temperature With Frequency Error data apply to a display from 300 digits on wards 2 With zero adjustment 3 With unknown waveform crest factor CF gt 2 measure with manual range selection 4 With exception of sinusoidal waveform Display Liquid crystal display section 52 mm x 38 mm with analog indication and digital display and with display of the unit of measured quantity function and various special functions Analog Indication LCD scale with pointer Scale length 55 mm Graduation 5 0 30 with 29 scale divisions on 0 30 with 25 scale divisions on all other ranges Polarity indication with automatic change over Overrange indication by triangle 13 Sampling rate 20 readings s on 10 readings s Digital Display Height of numer 7 segment numerals 12mm Number of digits 3 digit lt 3100 counts Overrange OL is displayed Polarity indication sign is disp
3. Set the function selector switch 6 to Connect the sensor to the two terminals Briefly press the yellow multifunction pushbutton 5 The multimeter switches to temperature measurement it automatically detects the connected sensor Pt 100 to Pt 1000 and shows the measured temperature in C on the digital display Notes This measurement automatically considers the lead resistance of RISHABH temperature sensors which are available as accessory It is not possible to switch over to temperature measurement when the 300 resistance range is selected Sensor lead resistance up to 500 Lead resistance of sensors having a value differing from that of our sensors can be considered up to a value of 50 as follows Briefly press the yellow multi function pushbutton 5 again The LCD now displays the resistance value which the multimeter automatically considers after selecting the temperature measuring range We can recognise that this is the resistance correction value on the temperature measuring range The C character is simultaneously shown on the display You can set the lead resistance correction value as follows Press the HOLD pushbutton 3 to increment the value or the AUTO MAN pushbutton 4 to decrement the value Each time the pushbutton is briefly pressed the value changes by one digit Briefly press the yellow multi function pushbutton 5 again The LCD displays the measured temperature The flash
4. e operating the function selector switch 6 14 Duty Cycle measurement With duty cycle measurement we can determine the ratio of pulse duration to cycle time of recurring square wave signals Set the function selector switch 6 to V or V e Connections are made in the same way as for voltage measurement Briefly press the yellow multifunction pushbutton 5 twice The meter switches to duty cycle measurement The duty cycle that is the percentage pulse duration of a signal is displayed on the LCD in That is Pulse duration Duty cycle 96 X100 Cycle duration Notes Input applied frequency must remain constant during the duty cycle measurement Change over between voltages frequency and duty cycle factor measurement is done as described in the preceding section 13 15 AC Current measurement NC10 1000A can measure current upto 1000 A in two ranges i e 300 0A and 1000 A Where as NC10 300A can measure current up to 300 A in two ranges i e 30 00A and 300 0 A One of the two ranges can be selected manually with AUTO MAN key To measure the current through a cable push the trigger 21 to open the jaws and clamp the jaws around the cable as shown in Figurea Figure b 14 Unique design for safety and comfort Rotary mechanism for clamp jaws In conventional clamp meters display keys and clamp jaws are in the same plane When current measurement i
5. the clamp jaws To over come the above mentioned problems NC10 3004 1000A has a unique feature called Safe trigger mechanism in which trigger is located at bottom side of the clamp meter and far away from the jaws and hence the bus bar So user s hand is at safer distance from bare conductors hence minimizes the risk of electric shock to the user This is shown in figure e Also trigger can be comfortably operated with more than one finger which eliminates fatigue to the user 55 mm Figure e User s hand is at safer distance from bare bus bar conductor 16 Empty Positions Empty positions on dial indicates no function is available on these positions The digital display will look like as in figure below There are three empty positions present on the dial 17 Specifications Intrinsic error of Overload eas Hesi digital display capacity 1 mad Measuring Range lution Input impedance of rdg unciion digits at Overload Overload reference Value duration conditions 30 00 mV 10mV gt 10GQ lt 40pF 0 5 37 1000 V 3000 mV 100mV gt 10GQ lt 40pF 0543 V 300 V 1 11MQ lt 40 pF 02541 DC SE 3000 V 10 10MO lt 40pF 02541 AC Contin 3000 V 100mV 10MQ lt 40pF 02541 uously 100 V 77 lt 40 pF 03541 effirms 300
6. a pushbutton nor the function selector switch is operated during that time How to prevent automatic TURN OFF In order to prevent automatic TURN OFF select CONTINUOUSLY ON mode For this press yellow multi function pushbutton 5 and the ON OFF pushbutton 2 together The function CONTINUOUSLY ON is shown on the LCD 1 by the symbol 8 Turning the multimeter OFF Press the ON OFF pushbutton 2 4 Function and range selection 4 1 Autoranging The multimeters feature autoranging for all measuring ranges with the exception of the 30 mV 300 mV ranges Autoranging is Automatically selected after switching the multimeter ON According to the measured quantity applied the multimeter automatically selects the measuring range which gives the best resolution When switching to frequency measurement and ratio measurement the previously selected voltage measuring range is maintained The meter switches automatically to the next higher range at 3099 digits 1 digit the next lower range at 240 280 digits 1 digit 4 2 Manual range section You can switch OFF autoranging and select the ranges manually according to the table on the following page Manual mode is switched OFF when pushbutton AUTO MAN is pressed 4 for approximately 1s when the function selector switch 6 is operated or when the meter is turned OFF and ON again When switching back to autoranging from 30 mV or 300 mV ranges 3 V range is autom
7. start up or after storage of clampmeter verify that the battery of clamp meter does not leak Repeat this check in regular short intervals If the battery leaks completely remove the battery electrolyte carefully with a moist cloth and install a new battery before you operate clamp meter again When the symbol 17 flashes on the LCD 1 replace the battery as soon as possible Measurement can be done but a reduced measuring accuracy must be taken into account The multimeter operates with a 9 V flat cell battery according to IEC 6 F 22 or IEC 6 LR 61 or with a suitable NiCd storage battery 21 AN Attention Disconnect the instrument from the measuring circuit before opening battery cover to replace the batteries Replacing the battery e Place the clamp meter on its face Loosen the screw of battery cover Which is at rear bottom side of meter Remove battery cover by Sliding it to bottom side Remove the battery from the battery compartment and carefully disconnect battery connectors e Snap the battery connectors to a new 9 V battery and insert the battery into the battery compartment e Replace the battery cover by fitting it into slots on battery compartment e Tighten the battery cover with the screw Please destroy the batteries in an environment friendly way 18 2 Periodic Check up The clamp meter does not require any specific maintenance The surface between opening jaws should be cleaned with dry cloth be
8. the instant the pushbutton is pressed is used as reference value max 200 digits it is automatically deducted from the values measured thereafter The zero adjustment is cleared when By pressing the yellow multifunction pushbutton 5 for a long time clearance is acknowledged by the two sound signal switching the instrument OFF 8 1 Voltage measurement on electrical systems up to 1000V with the KS30 measuring adapter On low Voltage systems transient overvoltages of several kilovolts can occur due to switching functions or lightning discharges Direct connection of your multimeter to such systems for voltage measurement can be dangerous For voltage measurements in power systems with nominal voltages upto 1000V use the KS30 measuring adapter It is an adapter for multimeter which eliminates dangers caused by overvoltages and incorrect operation of the multimeter It provides the following protective functions Protection of the input circuit of voltage measuring range of multimeters The internal resistance of the KS30 limits the current in the case of overvoltage Overload capacity continuously 1200 Vrms Transient rise 10 us fall 1000 us 6 kV max w Safe suppression of sparking from spark plug after overvoltage Voltages above 1000V can be measured with a high voltage probe provided the necessary safety precautions are taken Resistance measurement Diode Test Forward direc
9. 0 V 1mV 11MQ lt 40pF 0 75 2 3000 V 10MQ lt 40pF 10 300 Digit sine 300 V 10MQ lt 40pF 07541 wave 100 V 7 lt 40 pF 300 Digit No load voltage 3000 Q 10mo max 3 2 V 05 3 3000 Q 100mQ max 32 V 0543 1000 V 3 000 kQ 1Q max 1 25 V 0441 DC Q A 30 00 kQ 100 max 125 V 0441 imin 300 0 KQ 100 Q max 1 25 V 0441 a 300 max 1 25 V 0641 eitis 3000 MQ 10kQ max 1 25 V 2041 sine gt 2000 V 1 max 32 V 02541 wave 3000A 04A 1545 j ontin A eno gg 1A 1545 1100A Con 30 00A 0 01 A 1545 330A NC10 300A 3000A O1A 15 5 Discharge Resistance U omx o 2 Kelvi 200090 01 7 5 Digit pt 100 2000 m ug es 1 0 59 850 0 C 1000 V T MN _ 2 Kelvin ra JMM pt 2000 C 2 Digit 1000 efilrms 2000 3 sine 850 0 01 C 1 042 30 00 nF 10pF 250Ka 2 5V 10439 1000 V F soon 100pF 250Ko 25V 1043 DC Contin 000 HF 25V AC uously 3 000 HF 1nF 250 1 043 30 00 UF 10nF 250KQ 2 5V 3 043 sine 300 0 Hz 01Hz 1 Hz 45 Hz 300 4 lt 3KHz Hz QA B BRE Contin 30 00 KHz 10Hz 10Hz 45Hz 30 KHz Uously 300 V 100 0 KHz 100 Hz 100 Hz des lt 100KHz 4 2Hz 1 KHz 35 9 30V 20 9805 01 2H 1 KHz 10KHz 1 At 0 40 C 2 With zero adjustment without zero adjustment 35 digits 3 Without sensor 4 3 V 1 5V
10. Digital Clamp meter NC10 300A 1000A 15000132 User Manual gt 100v vorcg 1 A Z 1 Liquid crystal display 11 Display for the selected function 2 ON OFF pushbutton 12 Display for the unit of 3 Pushbutton for data hold measured quantity and MIN MAX storage functions 13 Over range indication for positive analog range 4 Pushbutton for manual range 14 Pointer for analog indication selection 15 Scale for analog indication 5 Multi function pushbutton 16 Over range indication for negative analog range 6 Function selector switch 17 Low battery indication Buzzer indication 7 Terminal sockets 19 Display C for temperature measurement range 8 Symbol for CONTINUOUSLY ON 20 Rotary mechanism for clamp jaws 21 Safe trigger mechanism 9 Display for digits decimal point and polarity 10 Display for manual range selection data HOLD and MIN MAX storage Contents 1 Introduction 2 Safety features and safety precautions 3 Switching the Clampmeter ON 3 4 Function and range selection 4 1 Autoranging 4 Manual range selection 4444 20 4 5 Liquid crystal display 5 1 Digital display 229 52 Indication ctr 5 5 3 JBACk it 5 6 Data HOLD cette tette ertet 6 7 Minimum value and maximum value MIN MAX storage facility 8 Voltage measuremen
11. afe operation is no longer possible take the meter out of service and secure it against accidental use Safe operation may not be possible e when the meter shows obvious signs of damage e when the meter no longer functions correctly e after prolonged storage under adverse conditions e due to severe stress during transportation 3 Switching the Clamp meter ON Battery We have already fitted your meter with a 9 V flat cell battery according to IEC 6 F 22 or IEC 6 LR 61 It is ready for operation Before you use the meter for the first time or after storage refer to Section 18 1 Maintenance Battery Switching the meter ON Press the ON OFF pushbutton 2 Switch ON is acknowledged by a sound signal As long as you keep the pushbutton pressed all segments of the liquid crystal display LCD will appear The LCD is shown behind cover page After the pushbutton is released the meter is ready for operation Note Electric discharges and high frequency influence may cause incorrect information to be displayed and block the measuring process Reset the meter by switching it OFF and ON again otherwise check the battery connections Disconnect the clamp meter from the measuring circuit before you open it and see section 18 Maintenance Automatic TURN OFF The meter turns off automatically when the measured value remains constant variations of the measured value lt 2digits for about 10 minutes and when neither
12. atically selected Acknowl AUTO Function edgement MAN Sound 4 Display Signal Short Manual mode on MAN 1x Used range is fixed 10 Switching sequence at V 3V 2 30V 5 300V gt 1000V gt 30 Short 300 mV 3 V gt MAN Ort vL 3V 30V 300 V 5 1000 V 5 3V gt 10 1x Q 30MQ gt 300 5 3000 2 3 330kQ gt 300kQ gt 3 gt 30M F 30 nF gt 300 nF 23 HF 230 HF 30 nF Hz 300 2 gt 3 2 gt 30 KHz gt 100 2 gt 300 Hz NC10 1000A 300A 1000A 300A NC10300A A 30A 300A 30A Long Return to autoranging 12x 5 Liquid crystal display 5 1 Digital display The digital display 9 shows the measured value with correct location of decimal point and sign The selected measuring Unit 12 and the function 11 are simultaneously displayed When measuring DC quantities a minus sign appears in front of the digits when the positive pole of the measured quantity is applied to the input terminal When upper range limit 3099 the range 1999 is exceeded then OL is displayed With Vand Q measurements the digital display is updated two times per second 5 2 Analog indication The analog indication with pointer presentation gives the dynamic response of a moving coil movement and is updated 20 times per second when measuring Vand Q Analog indication is of particular advantage when observing variations of measured
13. e decimal point is also held With autoranging selected the measuring range of the analog indicator is no longer known Note Hold function is not available in functions and 30mV and 300 mV ranges in function V To activate HOLD function momentarily press the HOLD key As long as the data HOLD function is active manual range selection is not possible The data HOLD function is switched OFF when The HOLD pushbutton 3 is pressed for approx 1s This is acknowledged by 2 sound signals w The function selector switch 6 is operated or multimeter is turned OFF and ON again 7 Minimum value and Maximum value MIN MAX storage facility With the MIN MAX function you can hold the minimum and the maximum measured value which was applied to the input of the multimeter after activating MIN MAX function The most important application is the determination of the minimum and the maximum value for long term monitoring of measured quantities MIN MAX does not influence the analog indication The actual measured value can still be noted read Apply the measured quantity to the meter and select the measuring range prior to activating the MIN MAX function With the function activated you can select the measuring ranges only manually if you switch to another range the stored MIN MAX values are cleared Meter acknowledgement Measured Displa Function d Valuas Sound MIN MAX MIN MIN and MAX digita Sig
14. ecautions Shock hazards exist wherever voltages of more than 30V TRMS are present e Do not work alone in shock hazardous environment while carrying out measurement e The maximum permissible voltage between any of the terminal sockets 7 and ground is 1000V e into account that unexpected voltages can occur on device under test e g defective instrument For example capacitors may be charged to a dangerously high voltage e Verify that the test leads are in good condition e g no cracked insulation no open circuits in the leads or connectors e This clamp meter must not be used for measurements on circuits with corona discharge high voltage e particularly careful when measuring on HF circuits Dangerous composite voltages may exist there e Measurements under moist environmental conditions are not permitted e Do overload the measuring ranges beyond their allowable capacities Limit values are given in specifications Ref Chapter 16 e For safe voltage measurements in power systems upto 1000V we recommend the KS30 measuring adapter which is available as an accessory Its internal resistance limits the measuring current in the case of overvoltage in correct operation and safely suppresses sparking from spark gap Also refer to Section 8 1 Voltage measurement on electrical systems up to 1000V with KS30 measuring adapter Meaning of categories and their significance per IEC 61010 1 CAT I Measurem
15. ents in electrical circuits which are not directly connected to the mains for example electrical systems in motor vehicles and aircraft batteries etc circuits CAT Measurements in electrical which are electrically connected to the low voltage mains with plugs e g at home in the office or laboratory etc CAT Ill Measurements in building installations stationary power consumers distributor terminals devices connected permanently to the distributor CAT IV Measurements at power sources for low voltage installations meters mains terminals primary over voltage protection devices Meaning of the symbols on the device Warning of a danger point ZN Attention refer to the user manual Earth ground terminal Ii Double or reinforced insulation CAT III IV Instrument for over voltage category II III OR IV Meaning of the acoustic signals 1 Intermittent acoustic signal Voltage limit exceeded for Voltage 1000 V 2 Intermittent acoustic signal Current limit exceeded for Current gt 1100 A Repair replacement of parts When opening the meter live parts may be exposed Therefore the meter must be disconnected from the measuring circuit prior to opening its case for repair or replacement of parts If repair cannot be avoided unless the meter is opened and live this work must only be performed by a qualified person who understands the danger involved Faults and abnormal stress When it is realised that the s
16. fore operating Avoid use of cleansers abrasives or solvents 22 NC10 07 LUMEL S A ul S ubicka 1 65 127 Zielona G ra Poland tel 48 68 45 75 100 exchange fax 48 68 45 75 508 e mail lumel lumel com pl Export Department Tel 48 68 45 75 302 or 304 Fax 48 68 325 40 91 e mail exportQlumel com pl
17. ing decimal point shows you that we have entered a correction value for the lead resistance The correction value is retained as long as multimeter is switched on me Each time the yellow multi function pushbutton 5 is briefly pressed the display changes between measured temperature and correction value of the lead resistance We can exit the temperature measurement function by pressing the yellow multi function switch 5 longer this is confirmed by the two sound signals by changing the function selector switch Note For the lead resistance the actual value measured on the clamp meter should be taken as correction value and not any specified value 12 Capacitance measurement e Verify that the device under test is electrically dead External voltages would falsify the measured results Setthe function selector switch 6 to F e Connect the discharged device under test to the and F socket via test lead Notes Connect polarized capacitors with the pole to the socket Resistors and semiconductor junction in parallel with the capacitor falsify the measured results 12 Zero adjustment on the 30 nF measuring range When measuring small capacitrance values on the 30 nF range the internal resistance of the multimeter and the capacitrance of the leads can be eliminated by zero adjustement Connect the test leads to the meter without device under test e Briefly press the yellow multi fu
18. layed when the positive pole is at 1 Sampling rate 2 reading s and C 1 reading s Power supply Battery 9V flat cell battery manganese dioxide cell according to IEC 6 F 22 alkaline manganese cell according to IEC 6 LR 61 or suitable NiCd storage battery Lifespan Without backlit ON using alkaline manganese cell approx 220 hours on V approx 80 hours on V Battery test Automatically flashes the BNF symbol when the battery voltage drops below approx 7 V EMC Electromagnetic compatibility Emission EN 61326 2002 Class B Immunity EN 61326 2002 IEC 61000 4 2 8 kV atmosphere discharge 4 kV contact discharge IEC 61000 4 3 3 V m 20 Response time after manual range selection Measured quantity X Step function of the measuring range of analog of digital measured quantity indication display V V from 0 to 80 of upper range limit ENTIS of upper range limit inis eo 0 is S0OHz kkz Mags trom 0to50 30100KHz 075 of upper range limit tHe f Mes Exe Ambient conditions Functional temperature range 40 C 50 C Storage temperature range 25 C 70 C without batteries Altitude up to 2000 m Mechanical configuration Dimensions 90mm W x 270 mm L x 70 mm H Weight 600 g approx including battery 18 Maintenance Caution Disconnect the meter from the measuring circuit before you open it to replace the battery 18 1 Battery Prior to initial
19. nal stored Storage Continued MIN 1x Store and in the background value displa new MIN MAX stored values are displayed MAX 1 value Same as 1 came 3 Short Same Stored Values are same 4 Return to 1 notcleared 451 ast Cleared Cleared Cleared 2 x The MIN MAX function is switched OFF when the MIN MAX pushbutton 3 is pressed for approximately 1s or when the function selector switch 6 is operated or when the meter is turned OFF and ON again Voltage measurement Voltage measurement on electrical systems up to 1000 V with the KS30 measuring adapter 8 Voltage measurement According to the voltage to be measured set the function selector switch 6 to V Connect the test leads as shown 1 socket should be connected to the lowest potential ground available Notes The 30 mV and 300 mV measuring ranges can only be selected manually with the AUTO MAN pushbutton 4 On the 1000 V range an intermittent sound signal warns you when the measured value exceeds the upper range limit Zero adjustment on the 30 mV measuring range Connect the test leads to the meter and join the free ends After having selected the measuring range briefly press the yellow multi function pushbutton 5 The meter acknowledges zero setting by a sound signal the LCD shows 00 00 1 digit and the decimal point flashes The displayed voltage at
20. nction pushbutton 5 diplaying 00 00 4 1 digit on the LCD and by a flashing decimal point The capacitance measured at the instant the pushbutton is pressed is used as reference value max 200 digits It is automatically deduced from the values measured thereafter Zero adjustment can be cleared e By pressing the yellow multi function pushbutton 5 for a long time clearance is acknowledged by the two sound signal switching the multimeter off 13 Frequency measurement Frequency measurement is possible on all voltage measuring ranges in AC and DC modes e Set the function selector switch 6 to v v e Connections are made the same way as for voltage measurement Briefly press the yellow multi function pushbutton 5 The multi meter switches to frequency measurement The frequency is displayed on the LCD See section 16 Specifications for the lowest measurable frequencies and the maximum permissible voltages Changing over between voltage frequency and duty cycle measurement Repeated brief pressing of the yellow multi function switch 5 changes the measuring function in the following order Voltage Frequency gt duty cycle gt Voltage From frequency or duty cycle measurement directly switching back to voltage measurement is possible By pressing the yellow multi function pushbutton 5 for a long time The meter acknowledges this by tow sound signals The voltage measuring range last selected is maintained
21. s the voltage drop does not exceed the maximum display value of 1 999V you can also rest several series connected elements or reference diodes with small reference voltage Reverse direction or open circuit The multimeter indicates overrange OL Note Resistors and semiconductor junction in parallel with the diode falsify the measured results Diode test and continuity test with buzzer With the buzzer function selected the meter emits a continuous sound signal on the range 0 approx 0 2 V To switch the buzzer ON e Briefly press the yellow multi function pushbutton 5 multimeter acknowledges turn ON with a sound signal At the same time the symbol 18 appears on the LCD To switch the buzzer OFF Briefly press the yellow multi function pushbutton 5 again The multimeter acknowledges turn OFF with a sound signal The symbol 18 disappears from the LCD When selecting the function Diode test and continuity test with the function selector switch 6 the buzzer is always switched OFF Repeated brief pressing of the multifunction pushbutton 5 alternately switches the buzzer on and off When pressing the push button for a long time the buzzer is always switched OFF this is acknowledged by the buzzer sounding twice 11 Temperature measurement The Nc10 300A 1000A allows you to measure temperature with Pt 100 and Pt 1000 temperature sensors in the range from 200 100 C 850 C
22. s to be done on vertical bus bars over head cables cables in congested places user connect the clamp meter but the keys and display may not be visible hence not able to take the readings or operate the keys To over come the above mentioned problem NC10 300A 1000A has a unique feature called Rotary mechanism for clamp jaws In this the clamp jaws are rotating Hence it is possible to align the clamp jaws as the orientation of bus bar conductor while keeping Display and keys facing the user so that user can take the readings and operate the keys Rotary clamp jaws can be rotated at different angles with the step of 30 maximum up to 90 in both clock wise as well as anti clock wise direction as shown in figure c Figure c Figure d 15 Normally it is difficult to access the middle busbar for current measurement With Rotary mechanism for clamp jaws it is easy to access middle bus bar while keeping display and keys facing towards the user as shown in figure d on previous page Safe trigger mechanism The conventional clamp meters have trigger mechanism either near to left jaw or right jaw While taking measurements on bare bus bar or bare conductor the user s hand comes very close to bare bus bar conductor which increases the risk of electric shocks to the user Also in conventional clamp meters trigger is operated with single finger usually a thumb which causes fatigue to the user while opening or closing
23. t 8 1 Voltage measurement on electrical system upto 1000V with the KS30 measuring adapter 9 9 Resistance measurement 10 Diode test and continuity test 11 Temperature measurement 12 Capcacitance measurement 13 Frequency measurement 14 Duty cycle measurement 15 AC Current measurement 16 Empty Positions 17 Specifications 18 Maintainance 18 1 Battery 18 2 Periodic Check up 22 DX UO M 22 1 Introduction Thank you very much for selecting Digital Clamp meter NC10 300A 1000A LUMEL S A is the leading manufacturer of Electrical and Electronics state of art measuring instruments These clamp meters are manufactured as per IS 13875 and DIN 43751 2 Safety features and safety precautions You have chosen a Clamp meter which provides you a very high degree of safety The digital clamp meter NC10 300A 1000A manufactured and tested in compliance with the safety standard IEC 61010 1 2001 DIN EN 61010 1 2001 In case of incorrect use or careless handing the safety of both user and clamp meter is not assured For proper use and safe handling it is absolutely necessary to read and understand the operating instructions before using the clamp meter Please note the following safety precautions e The clamp meter must be operated only by persons who understand the danger of shock hazards and are aware of the necessary safety pr
24. tion Reverse direction 10 co Resistance measurement Verify that the device under test is electrically dead External voltages would falsify the measured result Set the function selector switch 6 to Connect the device under test as shown 4 Zero adjustment the 300 measuring range When measuring small resistance values on the 30 range you can eliminate the resistance of the leads and contact resistance by zero adjustment e Connect the test leads to the multimeter and join the free ends e Briefly press the yellow multi function pushbutton 5 The meter acknowledges zero adjustment by a sound signal the LCD shows 00 00 1 digit and the decimal point flashes The resistance measured at the instant the pushbutton is pressed is used as reference value max 200 digits It is automatically deducted from the values measured thereafter Zero adjustment can be cleared pressing the yellow multifunction pushbutton 5 for a long time and is acknowledges by two sound signals switching the multimeter OFF 10 Diode test and continuity test e Verify that the device under test is electrically dead External voltages would falsify the measured results e Set the function selector switch 6 to gt e connect the device under test as shown Forward direction and or short circuit The multimeter displays the forward voltage in Volts As long a
25. values and for calibration procedures The analog indicator has its own polarity indication When measuring DC quantities the analog scale 15 has a negative range of 4 scale divisions so that variations of the measured values around zero can be observed exactly When the measured value exceeds the range of indication the left triangle 16 is shown before the polarity of the analog indicator switches over after approximately 0 7s The over range indication on the measuring range gt 3099 digits on the range gt 1999 is shown by the right triangle 13 5 3 Backlit Optional The instrument is provided with user selectable Back lit for taking measurements in poor lighting conditions dark areas Switching the Backlit ON by pressing AUTO MAN and HOLD keys simultaneously the Backlit can be switched ON Switching the Backlit OFF by pressing AUTO MAN and HOLD keys simultaneously the Backlit can be switched OFF 6 Data HOLD facility The HOLD function allows to automatically hold the measured values The meter holds the measured value on the digital display with a sound signal and displays HOLD on LCD display 10 The probes or clamp can now be removed from themeasuring point and the measured value on the digital display 9 can be read The analog indication is not influe nced by the data HOLD The actual measured value can still be noted read Note that with a held digital display the location of th

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