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Summary of Contents for KJ KJ2818
- Page 1 KJ2818 Automotive Digital Multimeter Operation Manual...
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Page 2: Unpacking Inspection
To avoid electric shock or personal injury, read the “ Safety Information” and rules for safe operation carefully before using the Meter. KJ2818 Automotive Digital Multimeter (hereafter referred to as “the Meter”) are 3 1/2 digits with steady operations, fashionable structure and highly reliable hand-held measuring instrument. -
Page 3: Safety Information
9V Battery (6F22 or equivalent) 1 piece In the event you find any missing or damage, please contact your dealer immediately. Safety Information In this manual, a “ Warning ” identifies conditions and actions that pose hazards to the user, or may damage the Meter or the equipment under test. - Page 4 case) is removed. Look for cracks or missing plastic. Pay attention to the insulation around the connectors. Inspect the test leads for damaged insulation or exposed metal. Check the test leads for continuity. Replace damaged test leads with identical model number or electrical specifications before using the Meter.
- Page 5 measurements. Do not use or store the Meter in an environment of high temperature, humidity, explosive, inflammable and strong magnetic field. The performance of the Meter may deteriorate after dampened. When using the test leads, keep your fingers behind the finger guards.
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Page 6: International Electrical Symbols
International electrical symbols Low battery indicator Grounding ～ AC (Alternating DC(Direct Current) Current) Warning. Refer to the Double Operating Manual Insulated Conforms to Standards of European Union The Meter Structure (see figure 1) 1. LCD Display 2. Data HOLD button 3. -
Page 7: Function Description
Function description Rotary switch Description position DC voltage measurement AC voltage measurement Resistance measurement Diode test Continuity test DC current measurement Temperature measurement ℃ Frequency measurement FREQ Engine Tach (Rotation Speed) TACH measurement Automobile Ignition Dwell measurement DWELL Buttons Power switch POWER Data hold button HOLD... -
Page 8: Dc Current Measurement
Warning a) To avoid harms to you or damages to the Meter from electrical shock, do not attempt to measure voltages higher than DC1000V /AC 750V rms, although readings may be obtained. b) When the Meter working at an effective voltage over 60V in DC or 30V rms in AC, special care should be taken for there is danger of electric shock. -
Page 9: Resistance Measurement
start with the highest range and reduce until satisfactory reading is obtained. b) If “1” or “-1” is shown on the LCD, it means the Meter is overloaded, then set the measuring range to higher. c) 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. - Page 10 To measure resistance, connect the Meter as follows: ·Set the rotary switch to desired Ω 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.
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Page 11: Diode Test
e) 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. Diode Test Warning To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before testing the diode in circuit. -
Page 12: Continuity Test
c) In a circuit, a good diode should still produce a forward voltage drop reading of 0.5V to 0.8V, however, the reverse voltage drop reading can vary depending on the resistance of other pathways between the probe tips. d) 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. -
Page 13: Temperature Measurement
Warning a) Do not apply any voltage to the input when the Meter is working in contonuity test mode. b) The open voltage of input terminal is approx. 3V. c) 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. -
Page 14: Frequency Measurement
18-23℃ and the influence is much greater at low temperature measuring range. c) When the measurement has been completed, disconnect the temperature probe. Frequency Measurement To measure frequency, connect the Meter as follows: ·Set the rotary switch to desired 200kHz or 2kHz range ·Connect the RED test lead into “VΩ”... - Page 15 To measure duty cycle, connect the Meter as follows: ·Connect the RED test lead into “VΩ” input terminal and BLACK test lead into “COM” input terminal. ·Set the rotary switch to Duty%. ·Connect the test leads across with the object being measured.
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Page 16: Dwell Testing
automobile. If a DIS ignition system without any distributor board is used in the automobile, connect the red test lead probe to the TACH (tachometer) signal line (which is connected to the computer DIS module of the automotive engine). Refer to the automotive servicing manual for the specific position. - Page 17 electronically, it is no longer necessary to adjust the dwell. In addition, the dwell testing can also be used to test a mixed-controlled solenoid. (e.g. GM feedback carburetor). ·Set the rotary switch to DWELL ·Insert the RED test lead “VΩ” input terminal and BLACK test lead into “COM”...
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Page 18: Auto Backlight On
·Read the ignition dwell of the tested automobile directly from the display. HOLD button（Data Hold） · Press HOLD button to enter and exit the Hold mode in any measuring mode. When it is active, the display value will be freezed on display until it be released. Auto Backlight on When you work at the dark area, the backlight will be turned on automatically. -
Page 19: Accurate Specifications
· Polarity: Auto Polarity · Overloading: Display “1” or “–1” · Low battery indicator: display · Sampling rate: 2～3 times/second · Range mode : Manual range · Power: 9V Battery (6F22 or equivalent) 1 pieces · Operating temperature: 0～40℃（32℉～104℉） · Storage temperature:（-10～50℃） （14℉～122℉） ·... - Page 20 DC Voltage Range Resolution Accuracy 200mV 0.1mV ±(0.5%+5) 10mV 200V 100mV 1000V ±(0.8%+5) Input impedance：10MΩ approx. Overload protection:：1000V rms (except 200mV range, it is 250V rms) AC Voltage Range Resolution Accuracy 200V 100mV ±(1.2%+5) 700V Input impedance：4.52MΩ approx. Overload protection:：1000V rms Frequency response ：...
- Page 21 DC Current Range Resolution Accuracy 20mA 10μA ±(1.8%+3) 200mA 0.1mA 10mA ±(3%+5) Overload protection： mA range：Self-healing fuse 20A range: 20A / 250V Fast. Drop voltage：200mV for full scale approx. Warning When the measured current is more than or equal to 10A, continuous measurement time is 10 seconds maximum and interval time between 2 measurements greater than 15 minutes.
- Page 22 At 200Ω range, 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. Diode test Range Resolution Description Open voltage is 3V approx. The normal forward voltage of PN junction is 500 ～...
- Page 23 NOTE: Temperature sensor： k type （ Nickel Chromium- Nickel Silicom thermocouple） Temperature probe attached is a point type Nickel Chromium- Nickel Silicon thermocouple, it is suitable for application that up to 250℃. Frequency Range Resolution Accuracy 2kHz 0.001kHz ±(2%+5) （not specified for >100kHz, for 200kHz 0.1kHz reference only ）...
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Page 24: Maintenance
Dwell Cylinder Resolution Range Accuracy number 3CYL 0-120.0° 4CYL 0-90.0° 0.1° 5CYL 0-72.0° ±(3.0%+5) 6CYL 0-60.0° 8CYL 0-45.0° Duty Cycle Resolution Range 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 ·... - Page 25 detergent. Do not use abrasives or solvents. The Meter use the self-healing fuse as the protecting component, so it not need to replace the fuse. If it shows no input as a trouble, you’d to check if the input is too great and out of the range, if that, you can try again after some time.
- Page 26 - End - *** This operating manual subject to change without notice. ***...
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