KEW SNAP2413F.qxd
Contents
1. Fig 8 6 Battery Replacement Replace the battery when B symbol appears on the LCD display 1 Set the function range switch to the OFF position 2 Unscrew and remove the battery compartment cover from the rear of the case 3 Install a new 9V battery of type 6F22 or equivalent observing correct polarity 4 Screw the battery compartment cover Remove this screw Fig 9 Z WARNING Never replace the battery during measurement 7 Cleaning Use a damp cloth detergent for cleaning the body of the instrument To avoid possible deforming or discoloring do not use solutions containing solvent NCAUTION Never use paint thinner benzene or other solutions containing solvent for cleaning the instrument Otherwise deforming or discoloring of the instrument body may result Q Handle the instrument with care and follow the instructions in order to maintain it in good condition for a long period of time 8 Before Sending for Repair Use the following troubleshooting guide for hints on problems with instrument operation Condition Possible Cause Remedy Display blanks after power on Battery is installed Battery is exhausted improperly Install the battery correctly Replace the battery Display reading remains frozen Data hold button is pressed in Peak hold switch is at ON position Release data hold button Set peak hold switch to2. measurement NCAUTION Transformers jaws especially their tips have been precisely adjusted to obtain maximum accuracy Take sufficient care to avoid shock vibration or excessive force when handing the instrument When a foreign substance is stick 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 suddenly 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 Q The maximum size of conductor that can be measured is approx 68mm in diameter An accurate measurement cannot be made on a conductor larger than this because the transformer jaws cannot be fully closed G Frequency selector switch 9 is designed to select the 50 60Hz and WIDE frequency ranges For further details refer to section 5 4 for operation of the frequency selector switch The transformer jaws may buzz when measuring large current This has no effect on the instrument s performance or safety 3 Set the function range switch to the desired position Do not exceed the maximum allowable input current for the selected range For normal measurement press the jaw trigger to open the transformer jaws and clamp onto one conductor only See Figure 3 Earth leakage current or small current that flow through a grounded wire can also be
3. C and relative humidity of 7596 without condensation 4 Instrument Layout Fig 2 B LCD Field effect liquid crystal display with maximum indication of 1999 Function symbol mA A and decimal point automatically appear as the function range switch is turned B is displayed on the lower left corner for low battery warning and 1 is displayed only at the highest digit for overrange indication Data Hold Button Allows for easy reading in dimly lit or hard to reach locations The display can be observed away from the conductor after pushing in the button Data hold can be released by pushing the button again after the reading is taken Two way Analogue Output Terminal AC current picked up by transformer jaws 7 is converted and output as AC and DC voltage output See Analogue Output in section 3 Specifications Insert output cord Model 7073 into this terminal for monitoring waveform with an oscilloscope making RMS measurements or connecting to a recorder Safety Hand Strap prevents the instrument from slipping off the hand during use Power Function Range Switch Selection function and range It is also used to turn power on or off ACAUTION Alwavs set the Power Function Range Switch to the OFF position after use Jaw Trigger Operates transformer jaws 7 Press to open the jaws Transformer Jaws Pick up the current flowing through the conductor Peak Hold Selector Sw
4. Transformer jaw tips are designed not to short the circuit under test If equipment under test has exposed conductive parts however extra precaution should be taken to minimize the possibility of shorting QG Never open the battery compartment cover when making measurement 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 Never try to make measurement if any abnormal conditions such as broken Transformer jaws or case is noted The instrument is be used only in its intended applications or conditions Otherwise Safety functions equipped with the instrument doesn t work and instrument damage or serious personal injury may be caused A WARNING QG Never attempt to make any measurement if any abnormal conditions are noted such as broken case cracked test leads and exposed metal parts 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 Do not try to replace the battery if the surface of the instrument is wet 2 A CAUTION Make sure that the function selector switch is set to an appropriate position before making measurement Be sure to set the function selector switch to the OFF position after use When the instrument will not be use for a long period of time p
5. INSTRUCTION MANUAL DIGITAL CLAMP METER KEW SNAP Series KEW SNAP 2413F KYORITSU ELECTRICAL INSTRUMENTS y WORKS LTD Contents 1 Safety Warnings eee 1 2 Features Hn 4 3 Specifications HH 4 Instrument Layout 5 Operation 5 1 Preparation DE 11 5 2 Current Measurement Meet 11 5 3 How to Use Peak Hold Function D 14 5 4 How to Use The Frequency Selector Switch sin 16 5 5 How to Use Data Hold Function DE 17 5 6 Analogue Output How to Use Model 7073 Output 17 6 f Batterv Replacement IDEE 19 7 Cleaning DE 20 8 Before Sending For Repair Meester eee eee eee eee eee eee nnnn 21 1 Safety Warnings Make sure to read through this instruction manual before using this instrument The instrument has been designed manufactured and tested according to IEC 61010 pollution degree2 CAT II 300V IEC 61010 pollution degree2 CAT 600V This instruction manual contains warnings and safety rules which must be observed by the use to ensure safe operation of the instrument and to retain it in safe condition Q The symbol Mindicated 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 instruction following each symbol in this manual NDANGER is reserved for conditions and actions that are likely to cause serious or fatal injury Z WARNING is reserved for condition
6. OFF position Transformer jaws buzz when measuring large current This is not a failure The lowest digit of reading is unstable This is not a failure The instrument is highly accurate so it senses slight variations in the current under test Output cord Model 7073 dose not output voltage The cord is open is circuit Check the cord for an open circuit DISTRIBUTOR Kyoritsu reserves the rights to change specifications or designs described in this manual without notice and without obligations KYORITSU ELECTRICAL INSTRUMENTS gt WORKS LTD No 5 20 Nakane 2 chome Meguro ku Tokyo 152 0031 Japan Phone 81 3 3723 0131 Fax 81 3 3723 0152 URL http www kew ltd co jp E mail info kew ltd co jp Factories Uwajima amp Ehime 92 1433A 0440
7. curacy Frequency Range Response WIDE 50 60Hz Time Limit for Measurements 200mA 0 199 9m A 2A 0 1 999A 20A 0 19 99A 1 0 rdg2dgt 50 60Hz 3 0 rdg2dgt 40 1 kHz 1 5 rdg 2dgt 200A 0 199 9A 1 5 rdg 2dgt 50 60Hz 3 5 rdg 2dgt 40 1 kHz 2 0 rdg 2dgt 1000A 0 500A 1 5 rdg 2dgt 50 60Hz 3 5 rdg 2dgt 40 1 kHz 2 0 rdg 2dgt Continuous 501 1000 A 5 rdg 50 60Hz 10 rdg 40 1 kHz 5 5 rdg X Refer to Figure 1 for frequency characteristics Effect of External Stray Magnetic Field 10min 10mA AC max in proximity to a 10mm dia conductor carrying 100A AC Effect of Residual Current 10mA AC max when clamping on two 10mm dia conductors each carrying supply or return 100A AC current 5 Frequency Characteristics 0 100 dB with the frequency selector 150 g ZR switch at WIDE position ii dB Typical for 200mA range with 20 d the frequency selector E A switch at WIDE position ay All ranges 20 PA with the trequency selector switch set at 10 g dB tA 50 60Hz position to cut off higher 2 frequencies 24dB oct ta l ii E r596 t L bi 203040 6080100 200 400 ik 5k 10k 20k 50k 100k Attenuati
8. d Capacitor Voltage Fig 7 For instance select the 10ms response time when measuring a surge current that will occur when a power supply device is switched on The 100ms response time is recommended for measuring the starting current of a motor or similar equipment A stable measurement can be made on the 100ms second response time setting as the peak hold circuit does not readily respond to the surge current 5 4 Howto Use The Frequency Selector Switch KEW SNAP 2413F has a very good frequency response because of the electromagnetic property of its transformers jaws Therefore it measured AC current not only of fundamental frequency of 50Hz or 60Hz but of high frequencies and harmonics superimposed on the fundamental frequency To eliminate these superimposed components and measure only in the fundamental frequency KEW SNAP 2413F has a high cut filter circuit which can be activated by activated by setting the frequency selector switch to the 50 60Hz position The high cut filter has a cut off frequency of approx 100Hz and an attenuation characteristics of approx 24 dB octave Note 24dB octave means that the magnitude of a signal declines by a factor of 16 when its initial frequency doubles The frequency selector switch has the following two positions WIDE 40Hz over 1kHz Covers a wide frequency band from mains supply to high frequencies generated by such equipment as inverters 50 60Hz 40 Approx 100Hz Filters o
9. e highest digit except for 1000A AC range Approx 1 seconds Approx times per second Available on all ranges Indoor use Altitude up to 2000m 23 C4 10C relative humidity up to 85 without condensation gt 10 50C relative humidity up to 80 without condensation gt 0 40 C relative humidity up to 85 without condensation 7 Power Source Low Battery Warning Current Consumption Standard Safety EMC Overload Protection Withstand Voltage Insulation Resistance Conductor Size Dimensions Weight Accessories Optional Accessories Peak Hold One 6 F22 or equivalent battery B symbol is shown on the display Approx 5mA max IEC61010 1 IEC61010 2 032 CAT lII AC300V Pollution degree 2 IEC61326 EN55022 1500A AC max for 1 minute 8700V AC for 1 minute between electrical circuit and housing cases 10M Q or greater at 1000V between electrical circuits and housing cases or metal parts of jaws Approx 68mm diameter max 250 L X130 W X50 D mmX 570g including battery 1 6F22 battery Carrying case Instruction manual 1 Model 7073 two way output cord Response time selectable from approx 10ms and 100ms 1 2 of the peak current is displayed which means an RMS reading will be obtained when current having sinusoidal waveform in measured Peak hold reading varies by approximately 1 max of full scale in the first minute at 23C H10
10. ion panel Incoming wire Interior wiring CAT III CAT IV vy CAT II Transformer CAT I r AN COEM 2 Features KEW SNAP 2413F is a unique digital clamp meter for both very low current and high current measurements Its shielded transformers jaws minimizes the effect of external stray magnetic field enabling leakage current measurements Measures from 0 1mA to 1000A AC and provides frequency response higher than 1kHz on all measuring ranges Measurements also possible with approximately 7 accuracy at 20 kHz on 200mA range Provides a frequency selector switch 50 60Hz or WIDE to turn on or off an incorporated low pass filter This permits current measurement in mains fundamental frequency only or a wide range of frequencies including those from such devices as inverters Peak hold facility with selectable response time of 10ms or 100 ms Two way analogue output terminal Provides AC voltage output proportional to the current under test for monitoring the waveform with an oscilloscope or measuring RMS current values with a true RMS reading instrument Also convent ACA readings to DC voltage output for direct connection to such devices as a chart recorder Data hold function to allow for easy readings in hard to reach locations Display can be observed away from the conductor 3 Specifications Measuring Ranges and Accuracy AC Current Ranges Ac
11. itch Selects 10ms or 100ms response time Set the switch back to the OFF position to release peak hold or make normal measurements Frequency Selector Switch Makes frequency response selection Barrier It is a part providing against electrical shock and ensuring the minimum required air and creepage distances 5 Operation 5 1 Preparation 1 2 To Check battery set the function range switch 5 To the desired position If the display is clear without symbol B showing battery voltage is sufficient If the display blanks or B is indicated replace the battery in accordance with the battery replacement procedures as described in section 6 Note B also appears on the display when the battery becomes exhausted during use Replace with a new battery Make certain that the data hold button is in the off position not pressed down If a measurement is made with the data hold button pressed in the display remains locked irrespective of input 5 2 Measurement Do not make measurement with the battery compartment cover Keep your fingers and hands behind the barrier during AWARNING Do not make measurement on a circuit above 600V AC Transformer jaw tips are designed to short the circuit under test If equipment under test has exposed conductive parts however extra precaution should be taken to minimize the possibility of shorting removed from the instrument
12. lace it in storage after removing the battery This is to avoid damage to the instrument by possible leakage from the battery Do not expose the instrument to the direct sun extreme temperatures or dew fall Placing the instrument in temperatures of 50 C or higher can cause the instrument s case to deform and result in operation failures Never apply voltage to the OUTPUT terminal the terminal is not electrically isolated from the internal circuits of the instrument OMeasurement categories Over voltage categories To ensure safe operation of measuring instruments IEC61010 establishes safety standards for various electrical environments categorized as CATI to 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 I CAT I Secondary electrical circuits connected to an AC electrical outlet through a transformer or similar device CAT Primary electrical circuits of equipment connected to an AC electrical outlet by a power cord CAT Primary electrical circuits of the equipment connected directly to the distribution panel and feeders from the distribution panel to outlets CAT V The circuit from the service drop to the service entrance and to the power meter and primary over current protection device distribut
13. measured by this method Fig 4 If is recommended that the conductor is placed at the center of the closed transformer jaws To measure out of balance leakage current clamp onto all conductors except a grounded wire The leakage current measure will be indication on the display Fig 4 amp Fig 5 2 7 Fig 3 Normal AC Current Fig 4 Earth Leakage Current Measurements Measurements Single Phase 2 wire system 3 phase 3 wire system in 3 wire system with neutral in 4 wire system with neutral clamp onto all 3 wire clamp onto all 4 wire Fig 5 Measurements out of balance Leakage Note When measuring large current observe the time limit specified in section 3 Specifications Otherwise the transformers jaws may overheat resulting in damage to the instrument 5 3 How to Use Peak Hold Function 10ms or 100ms response time can be selected for peak hold measurement Make selection according to your application needs 1 With the transformer jaws clamped onto the conductor under test slide the peak hold switch from the OFF position to the desired peak response time position 2 The peak hold display reads 1 2 of the peak current value Therefore an RMS reading will be obtained when the current under test has a sinusoidal waveform Input Current Peak Hold Current Output IP 2 displaved value 8 DC output voltage 3 Slide the peak hold switch back to the OFF position for a reset Note 1 KEW SNAP 2413F uses an a
14. nalogue peak hold circuit to ensure a quick response to input current Because of the nature of this circuit the peak hold reading may gradually fall or in a rare case rise with time This is likely to be apparent when the instrument is used in a high temperature and high humidity environment Therefore the instrument will not be suitable for making peak measurement over an extended period of time In case of such a need connect a recorder to the instrument via the analogue output terminal Note 2 If it is necessary to read the display away from the conductor in a peak hold measurement press the data hold switch 2 first and then remove the instrument from the conductor Otherwise the peak hold reading may be higher than the actual value due to the electrical noise caused by the opening and closing of the transformer jaws Press the data hold switch again for a reset 4 Difference between 10ms and 100ms Peak Response Time The peak hold circuit in this instrument charges the peak hold capacitor after rectifying the input waveform The time for the voltage of the capacitor to reach its peak value varies according to its capacitance and the output impedance of the charging circuit KEW SNAP 2413F sets the time for the voltage of the capacitor to reach 90 of its peak value to 10ma or 100ms by switching between two output impedances Refer to Figure 7 for further details 10ms Peak Response Time 100ms Peak Response Time 100 90 Hol
15. on dB 507090 300 500 Percentage Frequency Hz Fig 1 Analogue Output Output impedance Approx 1 AC Output Range Measuring Range AC Output Voltage Accuracy 200mA 0 200mA 2A 0 2A 2 rdg 0 200mV 20A 0 20A 200A 0 200A 2 5 rdg 0 500A 0 50mV 3 rdg 1000A 501A 1000A 50 100mV 5 rdg Voltage proportional to the current under test is output with WIDE frequency characteristics regardless of the setting of the frequency Selector or peak hold switch 6 DC Output Accuracy Frequency Range AC Input DC Output Freg Selector Freq Selector Ranges Current Voltage Switch at at 50 60Hz WIDE position Position 200mA 0 200mA 2A 0 2A 3 rdg 3 5 rdg 0 200mV 20A 0 20A 200A 0 200A 3 5 rdg 4 0 rdg 0 500A 0 50mV 5 rdg 5 5 rdg 501A 1000A 50 100mV 7 rdg 7 5 rdg DC voltage is output in proportion to the display reading which reflects frequency selector or peak hold switch position 200mV DC for 2000 count reading Operating System Display Range selection Overrange Indication Response Time Sample Rate Data Hold Location for use Temperature amp Humidity for Specified Accuracy Storage Temperature amp Humidity Operating Temperature amp Humidity Dual Integration Field effect 3 1 2 digit liquid crystal display with maximum count of 1999 Manual 1 is displayed on th
16. s and actions that can cause serious or fatal injury A CAUTION is reserved for conditions and actions that can cause bodily injury or instrument damage Z 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 Qn order to avoid injury or damage to the instrument or the circuit under test be sure to understand and follow all safety instructions contained in the manual Be sure to use the instrument only in its intended applications and to follow measurement procedures described in the manual Following symbols used on the instrument and in 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 Indicates an instrument with double or reinforced insulation 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 NDANGER Never make measurement on a circuit above 600VAC Q 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
17. ut high frequency components to restrict measurement in mains frequency band Note Selection with the frequency selector switch dose not apply to AC output of the two way analogue output DC output of the two way analogue output reflects the frequency selector switch setting Refer to Figure 1 for frequency characteristics 5 5 How to Use Data Hold Function Push in the Data Hold button to freeze the reading This is especially useful for taking a reading in a dimly lit or hard to reach locations The display can be observed away from the conductor Push the button again to release the reading 5 6 Analogue Output How to Use Model 7073 Output Cord AC and DC output can be obtained by inserting optional Model 7073 output cord into the two way analogue output terminal 3 AC Output Can be monitored by connecting a digital multimeter to analogue output terminal or observed as a waveform by connecting an oscilloscope For true RMS measurements connect a true RMS reading digital multimeter DC Output Can be monitored by connecting a digital multimeter or a recorder which enables many hours of monitoring See Figure 8 With the 2413F in the peak hold mode DC voltage corresponding to 1 2 of a peak current value can be held and output Refer to section 5 3 How to Use Peak Hold Function MODEL 7073 optional Note Put on the plug when not in use DC Output DC Output Oscilloscope Multimeter Recorder
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