Instruction Manual
Contents
1. position and A marks will be displayed on the LCD 2 Press HOLD OADJ button for 2sec or more to enable OADJ function and adjust the indication on the LCD to be 0 Indication shall be adjusted to 0 Otherwise error occurs 3 Place one measured conductor lower than the triangle mark indicated on the fork shaped sensor and make a measurement shaded part in the figure Then measured value is displayed on the LCD When the center of the conductor is not lower than the triangle mark indicated on the fork shaped sensor error occurs Note When current is flowing from the upside to the underside of the instrument reading is positive on the contrary reading to be negative when current is flowing from the underside to the upside of the instrument 6 1 2 AC current measurement 1 Set the function selector switch to A position and A marks will be displayed on the LCD 2 Place one measured conductor lower than the triangle mark indicated on the fork shaped sensor and make a measurement shaded part in the figure Then measured value is displayed on the LCD When the center of the conductor is not lower than the triangle mark indicated on the fork shaped sensor error occurs Note For the measurement of AC current zero adjustment which is required for the measurement of DC current is not necessary Current flowing direction has no relation to the indication polarity 6 2 Non contact voltage detection N2. as in a distribution board earth side could not be verified Also can check the presence of AC voltage in 200V cable way plug outlet fuse and circuit breaker 7 Other functions 7 1 Auto power off function This function causes the instrument to automatically enter the power off mode about 10min after the last function selector switch operation To release the power off function turn off the instrument and then turn on again 7 2 Data hold function Only on ACA DCA range This is a function to hold the measured value on the LCD H mark is shown on the LCD while the instrument is in the data hold mode To exit the data hold mode press the data hold button again Note The measured value being held will be released when auto power off function operates while data hold function is operating 8 Battery replacement A WARNING To avoid getting electrical shock be sure to set the function selector switch to OFF position before trying to replace the batteries A CAUTION Do not mix new and old batteries Make sure to install battery in correct polarity as indicated inside the battery cover When BATT mark is shown on the upper left corner of the LCD replace the batteries Note that the battery is completely exhausted the LCD blanks without BATT mark shown 1 Se the function selector switch to OFF position 2 Unscrew the battery cover fixing screws and remove the battery cover on
3. batteries Battery RO3 Instruction manual Carrying case Reference 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 vali The calibration is done with a conversion factor of 1 111 for sine wave which is found by di ing the effective value by the average value These instruments are therefore in error if the input voltage or current has some other shape than sine wave CF Crest Factor is found by dividing the peak value by the effective value Examples Sine wave CF 1 414 Square wave h a 1 4 duty ratio CF 2 4 INSTRUMENT LAYOUT Function Selector Switch Display Fork Jaws Hand Strap Ja m00 N Aeroc FORK CURRENT TESTER za Data Hold Zero Adjustment Button Data Hold Mode acme C m m ei novae af L L y T NCV Se Se E 5 Preparation 1 Check battery voltage Set the Function selector switch to the position other than OFF position Battery Voltage is enough if indications a
4. CV This function is to check the presence of voltage without touching wires or electrodes directly Also Can check the presence of AC voltage in cable outlet fuse and circuit breaker Details l dr voltage is applied to a cable or outlet the electric field depending on the voltage is generated This instrument detects the generated electric field and verifies the presence of AC voltage Officially it is called as an instrument for detecting electrical field But it is not a familiar term so we call it as Non contact voltage detection General detectors detect voltage by contacting polarized voltage contacts and terminals But this instrument is developed to satisfy this function and for safety purpose without contacting voltage A DANGER To avoid getting an electrical shock never make measurement on the circuit in which electrical potential over AC DC300V exists Before a measurement be sure to check the instrument operation with well known power supply If Err is displayed on the LCD do not make a measurement Do not make measurement with battery cover removed Indication on NCV range is a reference value Make sure to check the voltage with a precise equipment in advance when operator will directly touch or connect wires Indication of voltage may be affected by non grounded metal tube or metal case the place where affected by other voltages handgrip or the measuring position of sensor 6 2 1 Measuremen
5. Instruction Manual YVYYRVGVY TRUE IT AC DC FORK CURRENT TESTER KEW FORK MODEL 2300R KYORITSU ELECTRICAL INSTRUMENTS d WORKS LTD 1 Safety Warnings This instrument has been designed and tested according 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 to 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 to use 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 Be sure to understand and follow all safety instructions contained in the manual Be sure to observe above instructions Failure to follow the above instructions may cause injury instrument damage and or damage to equipment under test The symbol Ajindicated 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 Asymbol 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 acti
6. long period place it in storage after removing the batteries Use a cloth dipped in water or neutral detergent for cleaning the instrument Do not use abrasives or solvents 2 Features This instrument Fork current tester can measure AC DC current up to 100A without opening and closing the Jaws True RMS reading for AC current ork shaped sensor for easy measurement at tight places and crowded cable areas ICV function Non Contact Voltage enables live wire check Auto power off function Data hold function ocket size handy tester adopted over molding for a better fit arrying case furnished as a standard accessory Designed to international safety standards IEC 61010 2 032 overvoltage CAT III 300V Pollution degree 2 3 Specification AC current A Range Measuring range Accuracy CF Crest factor ACA 0 100A 3 0 rdg 5 dot 50 60Hz CES 2 0 rdg 5dgt 50 60Hz DC current A Range Measuring range Accuracy DCA 0 100A 2 0 rdg 5 dgt AC voltage V Range Measuring range Action NCV AC300V or less Normal condition Lo At voltage detecting single wire AC80V or more Hi Note NCV range is calibrated to detect the voltage where non grounded single wire AC8O0V or more However detecting sensitivity may be affected by the absence of grounded or non grounded metal tube or metal case Also it may be affected in
7. ons that can cause serious or fatal injury A CAUTION is reserved for conditions and actions that can cause minor injury or instrument damage A DANGER Never make measurement on the circuit above AC DC300V Do not attempt to make measurement in the presence of flammable gasses Otherwise the use of the instrument may cause sparking which can lead to an explosion 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 Do not open the battery cover and the instrument case when making measurement D WARNING Never attempt to make any measurement if the instrument has any structural abnormality noted such as cracked case or 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 batteries if the surface of the instrument is wet Always switch off the instrument before opening the battery compartment cover for battery replacement A CAUTION Always make sure to check the function selector switch is set to the appropriate range before starting measurement Do not expose the instrument to the direct sun high temperature and humidity or dewfall Be sure to set the function selector switch to the OFF position after use When the instrument will not be in use for a
8. re displayed clearly and BATT mark is not displayed on the LCD If BATT mark is indicated or no indication on the LCD replace batteries with new one according to battery replacement procedures shown in clause 8 in this document A CAUTION Indications may not being displayed on the LCD despite the function selector switch is at the position other than OFF position This is because power off function operated automatically and the instrument turned off Power off function can be released by turning the function selector switch to OFF and then set it to the range on which you would like to make a measurement If LCD still blank batteries are completely exhausted Please replace batteries 2 Check the function selector switch is set to the appropriate range And also check data hold function is not enabled If inappropriate range is selected desired measurement cannot be made 6 Measurements 6 1 Current Measurement A DANGER To avoid getting an electrical shock never make measurement on the circuit in which electrical potential over AC DC300V exists Do not make measurement with battery cover removed A CAUTION Max diameter of measured object conductor is 10mm Place the center of the measured conductor lower than the triangle mark indicated on the fork shaped sensor shaded part in the figure 6 1 1 DC current measurement 1 Set the function selector switch to A
9. the place where influenced by other voltages how you grip the instrument or the measuring position of CF Crest Factor Standards indication Over range display Response time Sampling rate Temperature amp Humidity range guaranteed accuracy Operating Temperature amp Humidity range Storage Temperature amp Humidity range Power source Current consumption Power off function Overload Protection Withstand Voltage insulation Resistance Max diameter of measured object Dimensions Weight Accessories sensor CF 2 5 or less 1EC61010 1 Overvoltage CATIII 300V pollution degree 2 1EC61010 2 032 1EC61326 EMC standard LCD Max 1049 units symbols OL symbol is displayed on the LCD Only on current range Approx 2sec Approx twice per second 23 C 5 C Relative humidity 75 or less no condensation 0 40 C Relative humidity 85 or less no condensation 20 60 C Relative humidity 85 or less no condensation DC3V RO3 UM 4 x2pcs Approx 12mA or less To decrease current consumption detecting circuit is on only for 0 1 0 5sec Power off function operates automatically after a switch remains for 10min AC DC current AC DC 120A 10sec AC voltage NCV AC360V 10sec AC3700V for one min Between electrical circuit and enclosures 10MQ 1000V Between electrical circuit and enclosures Max 10mm 161 3 L x 40 2 W x 30 3 D mm 110g including
10. the bottom of the instrument Then replace new batteries RO3 x 2pcs
11. ts 1 Set the function selector switch to NCV position 2 The sensing mode 100V or 200V in effect is displayed on the LCD for 1min and NCV measurement starts 3 Position the tip part of fork typed sensor against the measured object When voltage is detected Hi will be displayed on the LCD Error could occur depending on the direction angle and contact surface of the instrument against the measured object On NCV range data hold function cannot be used Note When set the function selector switch to NCV range self check function operates and Indicates Err if there is some fault or abnormal condition Do not make a measurement if such indication displayed on the LCD Hi D Lo 6 2 2 Sensing mode There are two types of sensing mode 100V mode and 200V mode Above two modes can be changed over by pressing the data hold button 2sec or more The selected sensing mode is stored even if switching off the instrument When setting the function switch to NCV again measurement can be done on the same mode Factory setting 200V mode 1 100V mode Sensitivity on this mode is set sharp therefore the presence of AC voltage can be checked only by placing the instrument closer to the measured object such as an outlet a plug and parallel cords as shown in figure 2 200V mode Sensitivity on this mode is set dull so the earth side and non earth side of 100V cable way can de verified Where cables are crowded such
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