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KJ2818

Automotive Digital Multimeter

Operation Manual

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Summary of Contents for KJ2818

Page 1: ...KJ2818 Automotive Digital Multimeter Operation Manual ...

Page 2: ...steady operations fashionable structure and highly reliable hand held measuring instrument The Meter uses large scale of integrated circuit with double integrated A D converter as its core and has full range overload protection The Meter can measure AC DC Voltage DC Current Resistance Duty Cyle Temperature Diodes Continuity Automobile Ignition Dwell Engine Tach Rotation Speed and so on Unpacking I...

Page 3: ...ategory CAT II 1000V CAT III 600V and double insulation CAT II Local level appliance PORTABLE EQUIPMENT etc with smaller transient overvoltages than CAT III CAT III Distribution level fixed installation with smaller transient overvoltages than CAT IV Use the Meter only as specified in this operating manual otherwise the protection provided by the Meter may be impaired Warning To avoid possible ele...

Page 4: ... measurement has been completed disconnect the connection between the test leads and the circuit under test remove the testing leads away from the input terminals of the Meter and turn the Meter power off z The rotary switch should be placed in the right position and no any changeover of range shall be made during measurement is conducted to prevent damage of the Meter z Do not carry out the measu...

Page 5: ...rsonal injury z When servicing the Meter use only the same model number or identical electrical specifications replacement parts z The internal circuit of the Meter shall not be altered at will to avoid damage of the Meter and any accident z Soft cloth and mild detergent should be used to clean the surface of the Meter when servicing No abrasive and solvent should be used to prevent the surface of...

Page 6: ...ng Current DC Direct Current Warning Refer to the Operating Manual Double Insulated Conforms to Standards of European Union The Meter Structure see figure 1 1 LCD Display 2 Data HOLD button 3 Rotary Switch 4 Input Terminals 5 Power switch 6 Auto Light on backlight sensor Figure 1 ...

Page 7: ...Ignition Dwell measurement Buttons POWER Power switch HOLD Data hold button Measurement Operation DC AC Voltage Measurement To measure DC AC voltage connect the Meter as follows Set the rotary switch to desired DCV or ACV range Connect the RED test lead into VΩ input terminal and BLACK test lead into COM input terminal Connect the test leads across with the object being measured Read the value fro...

Page 8: ...rement has been completed disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals DC current Measurement To measure DC current connect the Meter as follows Set the rotary switch to desired DCA range Connect the RED test lead into mA or 20A input terminal and BLACK test lead into COM input terminal Connect the test leads in se...

Page 9: ...an 15 minutes d Remember to cut off the power supply of the circuit be measured before connect it e Do not apply any voltage to the input when the Meter is working in current measuring mode f When the measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals Resistance Measurement Warning To avoid...

Page 10: ...t or resistor be measured is open or higher than the range be selected the display will show 1 c For low resistance measurement it maybe make some additional error due to the resistance of the test leads at this case as a tip you can short the test leads firstly and record down the resistance then subtract it from the measuring value to obtain the more accurate result If the short resistance of th...

Page 11: ... To do diode test connect the Meter as follows Set the rotary switch to range Connect the RED test lead into VΩ input terminal and BLACK test lead into COM input terminal Connect the RED test lead to the anode and BLACK test lead to cathode of the diode be tested Read the approx forward voltage of the diode from the display For Si diode this voltage is normal of 500 800mV Press HOLD button if need...

Page 12: ...isconnect circuit power and discharge all the high voltage capacitors before doing continuity test in circuit To do continuity test connect the Meter as follows Set the rotary switch to range Connect the RED test lead into VΩ input terminal and BLACK test lead into COM input terminal Connect the test leads across with the object being tested Read the value from the display The buzzer sounds if the...

Page 13: ...ement To measure temperature connect the Meter as follows Set the rotary switch to C range and the display is ambient temperature Connect the red lead of temperature probe k type into mA input terminal and black lead of it into VΩ input terminal Put the sensor end of the temperature probe into the area want to measured Read the value from display Press HOLD button if need Warning a Do not apply an...

Page 14: ... lead into COM input terminal Connect the test leads across with the object being measured Read the value from display the unit is kHz Press HOLD button if need Warning a Don t apply the voltage more than 250V RMS to the meter at the frequency range b When the measurement has been completed disconnect the connection between the testing leads and the circuit under test and remove testing leads from...

Page 15: ...ich cause cannot get any reading b When duty cycle testing has been completed disconnect the connection between the temperature probe and the circuit under test Engine Tach Rotation Speed testing The RPM means the rotating frequency of the main shaft of the engine per minute To measure Engine Tach connect the Meter as follows Connect the RED test lead into VΩ input terminal and BLACK test lead int...

Page 16: ...in the automobile connect the red test lead probe to the primary negative end of the ignition coil Refer to the automotive servicing manual for the specific position Upon the start of the engine or during its operation test the rotation speed of the engine and read the displayed value from the display The unit is x10RPM Dwell Testing It was very important in the past to test the dwell of the cut o...

Page 17: ...d to good ground terminal of the automobile z If the cut off switch of an ignition system is tested connect the red test lead probe to the primary negative end of the ignition coil Refer to the automotive servicing manual for the specific position z If the GM feedback carburetor is tested connect the red probe to the ground terminal or the computer drive of the solenoid Refer to the automotive ser...

Page 18: ...dark area the backlight will be turned on automatically It help you read value clearly from the display The backlight will turned off automatically when it brought back to bright condition Auto Power OFF When the meter turned on after about 15 minutes it will enter sleep mode and it has a little power consumption and the display is blank during it sleep You can push the power switch twice to wake ...

Page 19: ...x 335g battery included Safety standards IEC 61010 1 in pollution degree2 overvoltage category CAT II 1000V CAT III 600V and double insulation Safety certificate μA mA input protection Self Healing Fuse EMC consider the accuracy is need to add 5 of full scale as the final accuracy when the strength of RF field less than1V m and not specified when it more than 1V m Accurate Specifications Accuracy ...

Page 20: ...ance 10MΩ approx Overload protection 1000V rms except 200mV range it is 250V rms AC Voltage Range Resolution Accuracy 200V 100mV 700V 1V 1 2 5 Input impedance 4 52MΩ approx Overload protection 1000V rms Frequency response 40Hz 400Hz not specified for 400Hz Display effective value of sine wave mean value response ...

Page 21: ...age 200mV for full scale approx Warning When the measured current is more than or equal to 10A the continuous measurement time is 10 seconds maximum and interval time between 2 measurements greater than 15 minutes Resistance Range Resolution Accuracy 200Ω 0 1Ω 2KΩ 1Ω 20KΩ 10Ω 200KΩ 100Ω 2MΩ 1KΩ 1 0 5 200MΩ 100KΩ reading 10 5 0 5 Overload protection 250Vrms Note ...

Page 22: ... junction is 500 800mV approx Overload protection 250Vrms Continuity test Range Resolution Description 1Ω open voltage is approx 3V The buzzer sounds if the resistance of a circuit under test is less than or equal to 10Ω The buzzer may or may not sound if the resistance of a circuit under test is between 10Ω to 70Ω The buzzer does not sound if the resistance of a circuit under test is higher than ...

Page 23: ...couple it is suitable for application that up to 250 Frequency Range Resolution Accuracy 2kHz 0 001kHz 200kHz 0 1kHz 2 5 not specified for 100kHz for reference only Overload protection 250Vrms Sensitivity 5Vrms Engine Tach Rotation Speed Cylinder number Range Resolution Accuracy DIS 3CYL 4CYL 5CYL 6CYL 8CYL 500 10000RPM 10RPM 3 0 5 Note RPM Rotate Per Minute ...

Page 24: ...on Accuracy 0 100 0 0 1 3 0 5 Maintenance Warning To avoid electrical shock or damage to the Meter please disconnect the test leads before open the case General Service Please have the Meter repaired to the reparing department be specified by the manufacture or a qualified person to get service Periodically wipe the case with a damp cloth and mild ...

Page 25: ...ric shock or personal injury replace the battery as soon as the battery indicator appears Make sure the test leads are disconnected from the circuit being tested before opening the bottom case Follow below process to replace the battery Turn the Meter off and remove all the connections from the input terminals Turn the Meter s front cover face down Remove the screw from the back cover and separate...

Page 26: ...25 End This operating manual subject to change without notice ...

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