Instruction Manual
Contents
1. Accuracy X Range Display range Allowable input Frequency 40V 0 00 42 00V 1 0 rdg 2dgt 400V 15 0 420 0V 0 00 750Vrms 45 66Hz 1200Vpeak or less 1 5 rdg 5dgt 750V 150 788V 20Hz 1kHz Input Impedance approx 2M O 200pF non sinusoidal waveforms add 1 5 of full scale for Crest factor lt 3 X4 counts or less is corrected to 7 DC Voltage V Auto range Range Display range Allowable input Accuracy 40V 0 00 42 00V 400V 15 0 420 0V 0 00 1000V 1 0 rdg 2det 1000V 150 1050V Input Impedance approx 2M O Resistance Continuity Q 9 Auto range Range Display range Allowable input Accuracy 4000 0 0 420 00 00 4 1 5 rdg 2det 40000 150 42000 90974000 au as Open loop Voltage approx 3V Measuring Current or less 400 Orange 0 06mA or less 4000 Orange The buzzer turns on for resistances lower than 20x 1 O Frequency Hz Current Auto range Range Display range Allowable input Accuracy 1000Hz 8 0 999 9Hz 10 0Hz 1000Hz 1 5 rdg 5dgt 4000Hz 900 4200Hz 1000 4000Hz 1 5 rdg 5degt Frequency Hz AC Voltage Auto range Range Display range Allowable input Accuracy 1000Hz 8 0 999 9Hz 10 0Hz 1000Hz 1 5 rdg 5det 4000Hz 900 4200Hz 900 4000Hz 1 5 rdg 5degt Output Output vo2. A DANGER Do not make measurement on a circuit above 1000VDC This may cause shock hazard or damage to the instrument or equipment under test Q Do not make measurement with the battery compartment cover removed from the instrument Q Do not make current measurement with the test leads connected to the V O and COM terminals G Keep your fingers and hands behind the barrier during measurement Set the function selector switch to the position DC should be shown on the upper left corner of the display wWith the transformer jaws closed and without clamping them onto the conductor press the Zero Adjust Reset button for about one second to zero adjust the display Zero adjust feature is for 400A range only When zero adjustment is completed AUTO appears on the display Press the trigger to open the transformer jaws and clamp them onto the conductor under test then take the reading on the display The most accurate reading will be obtained by keeping the conductor at the center of the transformer jaws NOTE During current measurement keep the transformer jaws fully closed Otherwise accurate measurement cannot be made The maximum measurable conductor size is approx 55mm in diameter When the current flows from the upside the display side to the underside of the instrument the reading is indicated positive The Zero Adjust Reset button may not completely zero adjust the output voltage f
3. Normal Normal Resistance Average Peak Peak Continuity Frequency check Average Zero Adjust Reset Button Used for zero adjustment on DCA and resistance ranges Also used to reset the display reading in the PEAK mode On DCA range AUTO is shown on the display when auto zeroing is completed Auto zeroing is available on 400A range only Digital Display Field effect digital display with maximum reading of 4200 Function symbols and decimal point are controlled by the microprocessor based on the selected function and measuring mode AC DC Average mode Negative sign ate Sm Data Hold AC DG AVG n ri i oh Resistance Continuity check ri LL Li v Voltage 1 0 al Ampere I Loz Low frequency input a EN Low battery warning Peak mode DCA auto zero Terminal Cover Slides over V O and COM Terminals to prevent access to them when OUTPUT terminal is in use 9OUTPUT Terminal For AC or DC current range only Provides DC voltage output in proportion to the AC or DC current reading The output is connected to a recording device such as a chart recorder for long hour monitoring No output is available on voltage and resistance ranges COM Terminal Accepts the black test lead for voltage or resistance measurement V Q Terminal Accepts the red test lead for voltage or resistance measurement Safety Hand Strap Prevents the instrument from slipping off the ha
4. This may cause electrical shock hazard and damage to the instrument or the circuit under test Q Do not make measurement with the battery compartment cover removed Never apply voltage to the OUTPUT terminal Attach the output plug to a connection lead so that the output voltage can be connected to a recording device such as a chart recorder Slide the terminal cover to the right to disclose the OUTPUT terminal and insert the output plug into the terminal Make connection to the recording device When the plug is inserted into the output terminal auto range function is cleared Set the range depending on the state of Data Hold Switch Data Hold Switch OFF 400A range Data Hold Switch ON 2000A range Note After measurement be sure to return Data Hold Switch to OFF position Set the function selector switch to the desired position ACA or DCA and follow appropriate measurement instructions NOTE During current measurement keep the transformer jaws fully closed Otherwise accurate measurement cannot be made The maximum measurable conductor size is approx 55mm in diameter Q Zero adjustment is not necessary on AC current range On DC current range the Zero Adjust Reset button may not completely zero adjust the output voltage from the OUTPUT terminal In this case make zero adjustment on the recording device Connecting the plug to the OUTPUT terminal disables the Auto power off function The
5. function is enabled on removing the plug from the terminal Consult the output voltage specifications shown in section and adjust the sensitivity of the recording device For long hours of use of the OUTPUT terminal use an Alkaline battery which will extend continuous recording time up to about 35 hours 8 Battery Replacement A WARNING To avoid electric shock hazard make sure to set the function selector switch to OFF and remove the test leads from the instrument before trying to replace battery A CAUTION Do not mix new and old battery Make sure to install battery in correct polarity as indicated in the battery compartment If the battery voltage becomes too low for the instrument to operate normally is shown on the display Then replace the battery Note that when the battery is completely exhausted the display blanks without shown Set the function selector switch to the OFF position Unscrew and remove the battery compartment on the bottom of the instrument Replace the battery observing correct polarity Use a new R6P or equivalent battery Re place and screw the battery compartment cover 9 Optional Accessories MODEL 8008 For AC current measurement only Multi Tran Model 8008 is designed to increase the measuring capability of a clamp meter With the use of the Multi tran you can not only extend current range over 3000A but also clamp on a large
6. the instruction manual Attention should be paid to each symbol to ensure your safety Refer to the instructions in the manual This symbol is marked where the user must refer to the instruction manual so as not to cause personal injury or instrument damage gt Indicates an instrument with double or reinforced insulation 5 Indicates that this instrument can clamp on bare conductors when measuring a voltage corresponding to the applicable Measurement category which is marked next to this symbol KH Indicates AC Alternating Current Indicates DC Direct Current Indicates AC and DC 1 2 This instrument satisfies the marking requirement defined in the WEEE Directive This symbol indicates separate collection for electrical and electronic equipment D lt 2 A DANGER Never make measurement on a circuit above 750VAC 1000VDC Do not attempt to make measurement in the presence of flammable gasses fumes vapor or dust Otherwise the use of the instrument may cause sparking which can lead to an explosion Never attempt to use the instrument if its surface or your hand is wet Do not exceed the maximum allowable input of any measurement range QG Never open the battery compartment cover when making measurement QG Never try to make measurement if any abnormal conditions such as broken Transformer jaws or case is noted Q The instrument is to be used only in its intended appli
7. INSTRUCTION MANUAL ERE SE EE TRIER DIGITAL CLAMP METER Z7 742XVAC DC27775 8 KEW SNAP SERIES KEW SNAP 2009H KYORITSU ELECTRICAL INSTRUMENTS WORKS LTD z Contents 1 Safety Warnings 1 2 4 Features nc 5 3 Specifications m th tn Y 4 Instrument Layout Ce hmmm 03033596 1 1 5 Preparation for Measurement Meme m hh hh hh hh mmm 14 5 1 Checking Battery Voltage Meere mh m hh hh hh hh ttn 14 5 2 Checking Switch Setting and Operation 14 6 Measurement ee ee ee ee eee ewe eee eee eee c htt tn 1 5 6 1 DC Current Measurement Mete mh mh m hh hh hh ht n 15 6 2 AC Current Measurement 353556 1 6 6 3 DC Voltage Measurement Mete mh mh m hh hh hh htt 17 6 4 AC Voltage Measurement Mete m nh mh m hh rh hh tn 18 6 5 Resistance Measurement Mete m hh mh mh hh hh htt 1 9 6 6 Continuity Check Mee hh hm ehh e hmm mk hk ttn 20 6 7 Frequency Measurement 20 6 8 Peak Measurement Mee mh mh hh hh hh hh hh htt 21 6 9 Average Measurement es 23 7 Other Functions Meme hh ehh hh hmm hh m rrr m n c ttn 24 7 1 Auto power off Function m m AI 24 F 2 Data Hold Function Mee mh mh hh hh hh hh hh htt 24 T 3 LoHz Function hm t tn 25 7 4 OUTPUT Terminal Ce hr m c t tn 25 8 Battery Replacement D 28 9 Optional Accessories n t n 29 1 Safety Warnings OThis instrument has been designed and tested acco
8. OFF position after use This is a function to prevent the instrument from being left powered on in order to conserve battery life This function causes the instrument to enter the Auto power off mode about 10 minutes after the last switch or button operation To exit the Auto power off mode turn the function selector switch back to OFF then to any other position or press any button NOTE Connecting the plug to the OUTPUT terminal disables the Auto power off function The function is enabled on removing the plug from the terminal The Auto power off function is disabled in the PEAK measurement mode 7 2 Data Hold Function This is a function used to freeze the measured value on the display Press the Data Hold button to freeze the reading The reading will be held regardless of subsequent variation in input M is shown on the upper right corner of the display while the instrument is in the Data Hold mode To exit the Data Hold mode press the Data Hold button again NOTE If the instrument in the Data Hold mode goes into Auto power off it will return to the normal mode 7 3 LoHz Function In ACV or ACA range if frequency of the voltage or current under test is 40Hz or lower the display indicates LoHz LoHz is also indicated where input is 396 of range or less 7 4 OUTPUT Terminal For current ranges only A DANGER Never use the instrument on a circuit above 750VAC 1000VDC
9. brasives or solvents OMeasurement categories Over voltage categories To ensure safe operation of measuring instruments IEC61010 establishes safety standards for various electrical environments categorized as CATI to CATIV and called measurement categories Higher numbered categories correspond to electrical environments with greater momentary energy so a measuring instrument designed for CATII environments can endure greater momentary energy than one designed for CAT TI CAT I Secondary electrical circuits connected to an AC electrical outlet through a transformer or similar device CAT I Primary electrical circuits of equipment connected to an AC electrical outlet by a power cord CAT II Primary electrical circuits of the equipment connected directly to the distribution panel and feeders from the distribution panel to outlets CAT WV The circuit from the service drop to the service entrance and to the power meter and primary over current protection device distribution panel Incoming wire Interior wiring CAT IV CAT III Transtomer CAT I Socket T UE 2 Features Tear drop shaped jaws for ease of use in crowded cable areas and other tight places G Accurate true RMS reading of AC current or voltage with distorted waveform Average function for easy reading of input with large variation Auto null function for easy zero adj
10. bus bar or conductor Set the function selector switch to the A position As shown in the figure below clamp KEW SNAP 2009R onto the pickup coil of MODEL 8008 Clamp MODEL 8008 onto the bus bar or conductor under test Take the reading on KEW SNAP 2009R and multiply it by 10 MAX Memo DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations KYORITSU ELECTRICAL INSTRUMENTS J WORKS LTD No 5 20 Nakane 2 chome Meguro ku Tokyo 152 0031 Japan Phone 81 3 3723 0131 Fax 81 3 3723 0152 Factory Ehime wwwW kew ltd co jp 10 04 92 2022
11. cations or conditions Otherwise safety functions equipped with the instrument doesn t work and instrument damage or serious personal injury may be caused 2 A WARNING Never attempt to make any measurement if the instrument has any structural abnormality such as cracked case and exposed metal part Do not turn the function selector switch with plugged in test leads connected to the circuit under test Do not install substitute parts or make any modification to the instrument Return the instrument to Kyoritsu or your distributor for repair or re calibration Q Do not try to replace the battery if the surface of the instrument is wet G Always switch off the instrument before opening the battery compartment cover for battery replacement A CAUTION G Make sure that the function selector switch is set to an appropriate position before making measurement Always make sure to insert each plug of the test leads fully into the appropriate terminal on the instrument Make sure to remove the test leads from the instrument before making current measurement Q Do not expose the instrument to the direct sun extreme temperatures or dew fall Be sure to set the function selector switch to the OFF position after use When the instrument will not be in use for a long period of time place it in storage after removing the battery Use a damp cloth and detergent for cleaning the instrument Do not use a
12. ent CDSet the function selector switch to the Q position Slide the terminal cover to the left to disclose the and COM terminals Plug the red test lead into the V O terminal and the black test lead into the COM terminal with the tip of the test leads shorted together press the Zero Adjust Reset button to offset the resistance of the test leads Press the mode selector button once to enter from the normal mode to the continuity check mode should be indicated on the display Connect the tip of the test leads to the circuit under test If the resistance is 20 00 or less the buzzer beeps 6 7 Frequency Measurement Q 0n ACA or ACV range the frequency of the current or voltage under test can be counted and shown on the display Qn the frequency measurement mode Hz is indicated on the display QG Trigger threshold is approx 10V for AC voltage and approx 40A for AC current A DANGER Never use the instrument on a high voltage circuit above 750VAC This may cause electrical shock hazard and damage to the instrument or the circuit under test Q Do not make measurement with the battery compartment cover removed Q Do not make current measurement with the test leads plugged into the instrument QG Keep your fingers and hands behind the barrier during measurement CDSet the function selector switch to the A or V position Press the mode selector button three time
13. ered down in about 10 minutes after the last switch operation power consumption about 200 u A DC AC current ranges 2400A AC for 10sec DC AC voltage ranges 1200V AC DC for 10sec Resistance range 1000V AC DC for 10sec 6880V AC 50 60Hz for 5 seconds between electrical circuit and housing case or metal part of the jaws 10MO or greater at 1000V between electrical circuit and housing case or metal part of the jaws Approx 55mm diameter max 250 L x105 W x49 D mm About 540g Test leads M 7017 R6P battery Carrying case M 9094 Instruction manual Recorder output Plug M 8201 Multi Tran M 8008 Output Lead M 701 4 4 Instrument Layout Transformer Jaws Pick up current flowing through the conductor Jaw Trigger Operates the transformer jaws Press to open the Transformer Jaws Function Selector Switch Selects function Also used to power the instrument on Data Hold Button Freezes the display reading H is shown on the display when Data Hold is enabled When the plug is inserted into the output terminal Data Hold Switch operates as range selection switch See 7 4 output terminal Mode Selector Button Selects measuring mode The instrument defaults to the normal mode NOR Then press this switch to cycle through measuring modes In any mode pressing this switch for more than one second returns the instrument to the normal mode AV A mV 30 Resistance ACA ACV Display DCA DCV Display Continuity
14. he tip of the red and black test leads to the circuit under test and take the reading on the display NOTE When the voltage under test measures 3 of the range or less or the frequency of the voltage is low LoHz is indicated on the display 6 5 Resistance Measurement A DANGER Never use the instrument on an energized circuit Do not make measurement with the battery compartment cover removed kKeep your fingers and hands behind the barrier during measurement CDSet the function selector switch to the 2J position Slide the terminal cover to the left to disclose the and COM terminals Plug the red test lead into the V O terminal and the black test lead into the COM terminal With the tip of the test leads shorted together press the Zero Adjust Reset button to offset the resistance of the test leads Connect the tip of the test leads to the circuit under test and take the reading on the display 6 6 Continuity Check 4000 range fixed The continuity check mode is enabled by pressing the mode selector switch on resistance range is indicated on the display to show the instrument in the continuity check mode The buzzer beeps if the resistance under test is 20 00 or less A DANGER Never use the instrument on an energized circuit Q Do not make measurement with the battery compartment cover removed QG Keep your fingers and hands behind the barrier during measurem
15. ltage 0 1mV_ 1count Range Allowable input Output Voltage mVDC Accuracy DC400A 0 0 400 0A O 400mvV DC2000A 0 2000 0 200mV ce hse AC400A 0 0 400 0A 0 400mV value AC2000A 0 2000A 0 200mV When the display is OL the output voltage is 420mV OL 420mV X Output impedance about 10k O Note OThe symbol of in the above table means that the instrument only displays the value but the accuracy the proper operation and the safety are not guaranteed 9 G Operating System G Display Overrange Indication G Response Time G Sample Rate GI Location for use G Temperature and Humidity for Guranteed Accuracy G Operating Temperature and Humidity QG Storage Temperature and Humidity QG Power Source Current Consumption G uto power off function Overload Protection Withstand Voltage insulation Resistance Conductor Size G Dimensions GO Weight Accessories Optional Accessories A gt modulation Liquid crystal display with a maximum count of 4200 plus annunciators OL is shown on the display Approx 2 seconds About 3 times per second Indoor use Altitude up to 2000m 23 5 C relative humidity up to 75 without condensation 0 40 C relative humidity up to 85 without condensation 20 60 relative humidity up to 85 without condensation Two 1 5VDC R6P SUM 3 batteries Approx 40mA max ACA Automatically pow
16. mode selector button twice to enter from the normal mode to the PEAK mode PEAK should be shown on the display Follow instructions for DCA ACA DCV or ACV measurement INPUT Current Note For accurate reading press the Zero Adjust Reset button to reset the reading after clamping onto the conductor or making test lead connections to the circuit under test Then proceed to measurement NOTE In the PEAK mode the auto ranging feature is disabled and measuring ranges are fixed as follows DC ACA 0 400 0A DC ACV 0 400 0A When a measured value is 9 counts or less it is corrected to O The Auto power off function is disabled in the PEAK mode as well 6 9 Average Measurement Qn the Average mode AVG is indicated on the display Q The display reads a running average of six readings over an interval of about 2 seconds This mode is available on ACV DCV ACA and DCA ranges CDSet the function selector switch to the desired position QGPress the mode selector button once to enter from the normal mode to the Average mode should be indicated on the display Follow instructions for ACV DCV ACA or DCA measurement The display shows a running average of six readings over an interval of about 2 seconds 7 Other Functions 7 1 Auto power off Function A CAUTION The instrument consumes small amount of battery power in the Auto power off mode Make sure to set the function selector switch to the
17. nd during use Test Leads Model 7107 Connected to COM and V Q terminals for voltage or resistance measurement Output Plug Model 8201 Plugs into the OUTPUT terminal for connection to a recording device See section 7 4 OUTPUT Terminal Barrier It is a part providing protection against electrical shock and ensuring the minimum required air and creepage distances 5 Preparation for Measurement 5 1 Checking Battery Voltage Set the function selector switch to any position other than OFF When the display is clear without BATT showing proceed to measurement When the display blanks or BATT is indicated replace the battery according to section 8 Battery Replacement NOTE The Auto power off feature automatically turns the instrument off in about 10 minutes after the last switch or button operation Therefore the display may be blank even with the function selector switch set to a position other than OFF To operate the instrument in this case turn the switch back to the OFF position then to any other position 5 2 Checking Switch Setting and Operation Make sure that the function selector switch is set to the correct position the instrument is set to the correct measuring mode and the Data Hold function is disabled Otherwise desired measurement cannot be made See section 6 for measurement instructions and section 7 for notes on functions 6 Measurement 6 1 DC Current Measurement
18. ock hazard and damage to the instrument or the circuit under test Q Do not make measurement with the battery compartment cover removed G Keep your fingers and hands behind the barrier during measurement Red test lead Black test lead Set the function selector switch to the V position DC should be shown on the upper left corner of the display Slide the terminal cover to the left to disclose the V Q and COM terminals Plug the red test lead into the V O terminal and the black test lead into COM terminal Connect the tip of the red and black test leads to the positive and negative sides of the circuit under test respectively Take the reading on the display If the connection is reversed the display indicates the sign 6 4 AC Voltage Measurements A DANGER Never use the instrument on a circuit above 750VAC This may cause electrical shock hazard and damage to the instrument or the circuit under test Q Do not make measurement with the battery compartment cover removed G Keep your fingers and hands behind the barrier during measurement Red test lead Black test lead Set the function selector switch to the V position AC should be shown on the upper left corner of the display Slide the terminal cover to the left to disclose the and COM terminals Plug the red test lead into V Q terminal and the black test lead into the COM terminal Connect t
19. rding to IEC Publication 61010 Safety Requirements for Electronic Measuring Apparatus This instruction manual contains warnings and safety rules which must be observed by the user to ensure safe operation of the instrument and retain it in safe condition Therefore read through these operating instructions before starting using the instrument A WARNING Read through and understand instructions contained in this manual before starting using the instrument Save and keep the manual handy to enable quick reference whenever necessary Be sure to use the instrument only in its intended applications and to follow measurement procedures described in the manual Be sure to understand and follow all safety instructions contained in the manual Failure to follow the above instructions may cause injury instrument damage and or damage to equipment under test OThe symbol A indicated on the instrument means that the user must refer to related parts in the manual for safe operation of the instrument Be sure to carefully read the instructions following each A symbol in this manual A DANGER is reserved for conditions and actions that are likely to cause serious or fatal injury A WARNING is reserved for conditions and actions that can cause serious or fatal injury A CAUTION is reserved for conditions and actions that can cause minor injury or instrument damage Following symbols are used on the instrument and in
20. rom the OUTPUT terminal In this case make zero adjustment on the recording device Turing the function selector switch to a position other than DCA cancels the zero adjustment 6 2 AC Current Measurement A DANGER Never use the instrument on a circuit above 750VAC This may cause electrical shock hazard and damage to the instrument or the circuit under test Q Do not make measurement with the test leads plugged into the instrument Q Do not make measurement with the battery compartment cover removed G Keep your fingers and hands behind the barrier during measurement Set the function selector switch to the A position AC should be shown on the upper left corner of the display Press the trigger to open the transformer jaws and clamp them onto a single conductor and take the reading on the display The most accurate reading will be obtained by keeping the conductor at the center of the transformer jaws NOTE During current measurement keep the transformer jaws fully closed Otherwise accurate measurements cannot be taken Maximum conductor size is 55mm in diameter Q Zero adjustment is not necessary in AC current measurement When the current under test measures 3 of the range or less or the frequency of the current is low LOHz is indicated on the display 6 3 DC Voltage Measurement A DANGER Never use the instrument on a circuit above 1000VDC This may cause electrical sh
21. s to enter from the normal mode to the frequency measurement mode Hz should be indicated on the display Follow instructions for ACA or ACV measurement and take the frequency reading NOTE When the voltage under test measures 3 of the range or less or the frequency of the current or voltage is 40Hz or less LoHz is indicated on the display 6 8 Peak Measurement Qn the PEAK mode the display shows current or voltage s crest in effective value For example when the current or voltage is sinusoidal the reading equals the crest value divided by the square root of two The display reading is constantly updated with a maximum crest Qn this mode PEAK is indicated on the display G Response time is 300ms in DC measurement and 10ms AC measurement A DANGER Never use the instrument on a circuit above 750VAC 1000VDC This may cause electrical shock hazard and damage to the instrument or the circuit under test Do not make measurement with the battery compartment cover removed Do not make measurement with the test leads plugged into the instrument G Keep your fingers and hands behind the barrier during measurement The PEAK mode is available on DCA ACA ACV ranges Set the function selector switch to the desired position Note Only on DCA range press the Zero Adjust Reset button for about one second to zero adjust the reading with the transformer jaws closed Press the
22. ustment Q Provides frequency reading in AC current or voltage measurement Auto ranging feature on current voltage and resistance ranges Wide measuring range from up to 2000A QG Terminal cover to avoid the use of an incorrect terminal Q PEAK function for measuring a peak of input Q Provides recorder output for long hour monitoring QG Data Hold function for easy reading in dimly light or hard to read locations Auto power off feature to extend battery life QG Permits easy continuity check with a beeper QG Provides a dynamic range of 4200 counts full scale Wide frequency range from 20Hz to 1kHz Q Uses shrouded transformer jaws to further improve safety G Designed to CAT V 600VAC DC CAT III750VAC 1000VDC pollution degree2 specified by the international safety standard IEC61 010 Effective Value RMS 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 scales 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
23. value These instruments are therefore in error if the input voltage or current has some other shape than sine wave Conversion Reading errors for Waveform ae factor average sensing PE E iis avg Vrms Vavg instrument 1 2 n wr 0 7 0 637 1 111 41 414 AX1 111 A A 1 A X100 1 11 196 2 05Ax 111 5 0 5A View R x 100 MS A141 43 21 732 71455 3 8 AVD 1 1 111WD 1 A 1 ATSAD TAD D x100 AvD WD CF Crest Factor is found by dividing the peak value by the effective value Examples DC CF 1 Sine wave CF 1 414 Square wave with a 1 10 duty ratio CF 3 6 3 Specifications Measuring Ranges and Accuracy at 23 5 relative humidity75 or less AC Current RMS value detection Auto range Range Display range Allowable input 400A 0 0 420 0A 1 3 rdg 45 66Hz 0 0 1700ArmS 5 Q rdg Sdgt 2000A 150 2100A 20Hz 1kHz 1700 2000Arms 2 3 rdg 3dgt 3000Apeak or less 45 66Hz X For non sinusoidal waveforms add 1 5 of full scale for Crest factor lt 3 X4 counts or less is corrected to DC Current A Auto range Range Display range Allowable input Accuracy 400A 0 0 420 0A 1 3 rdg 2dgt 2000A 150 2100A 0 9 2 After zero adjustments AC Voltage RMS value detection Auto range
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