Shenzhen Kejie Instrument Co., Ltd. KJ2815B Operation Manual

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KJ2815B/KJ2817B

Digital Multimeter

Operation Manual

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Summary of Contents for Shenzhen Kejie Instrument Co., Ltd. KJ2815B

Page 1 KJ2815B/KJ2817B Digital Multimeter Operation Manual...
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. Digital Multimeter Model KJ2815B/KJ2817B (hereafter referred to as “the Meter”) are 3 3/4 digits with steady operations, fashionable structure and highly reliable hand-held measuring instrument.
Page 3: Safety Information
2*1.5V AAA Battery 2 pieces Temperature probe 1 pieces (KJ2817B only) 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 Before using the Meter inspect the case. Do not use the Meter if it is damaged or the case (or part of the 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.
Page 5 should be taken for there is danger of electric shock. Use the proper terminals, function, and range for your 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.
Page 6: International Electrical Symbols
Constantly check the battery as it may leak when it has been using for some time, replace the battery as soon as leaking appears. A leaking battery will damage the Meter. International electrical symbols Double Insulated. Grounding. Low battery indicator Diode.
Page 7 Figure 1 Functional Button Description ☼ HOLD button (Backlight Coltrol / Data Hold) As HOLD function, press it to enter and exit the data hold mode. When it is active, the display value will be freezed on display until it be pressed again. As Backlight Control, press and hold this button for over 2 seconds to light on the backlight, until press and hold it for...
Page 8 REL button （KJ2817B only） The REL mode applies to all measurement functions except in frequency/duty cycle measurement, it subtracts a stored value from the present value and displays the relative value (Δ) as the result. The definition is as follows: Relative value (Δ) = present value - stored value For example, if the stored value is 10.0V and the present value is 12.0V, the reading would be 2.0V.
Page 9: Range Button
only At frequency range, the Meter defaults to frequency counter. Press Hz% to enter duty cycle mode, the Meter beeps, press Hz% again return to frequency counter function, the Meter beeps. At AC voltage or AC current range, press Hz% to start frequency counter, the Meter beeps.
Page 10: Function Description
In the autorange mode, the Meter selects the best range for the input detected. This allows you to switch test points without having to reset the range. In the manual range mode, you select the range. This allows you to override autorange and lock the Meter in a specific range.The Meter defaults to the autorange mode in measurement functions that have more than one range.
Page 11: Lcd Symbols
Rotary switch Description position DC voltage measurement AC voltage measurement DC millivoltage measurement Resistance measurement / Continuity test / Diode test Capacitance measurement DC / AC current measurement μA Temperature measurement ℃ LCD Symbols （see Figure 2） Figure 2 Symbol Description Low battery indicator Negative...
Page 12: Measurement Operation
True RMS Auto Range Not used Data hold mode Relative value measurment mode Δ Temperature measurement ℃, ℉ ℃℉ Not used Diode test mode Continuity test mode Hz KHz Frequency unit Duty cycle measurement Ω KΩ Resistance unit MΩ Capacitance unit nF μF Voltage unit mV V...
Page 13 · Connect the test leads across with the object being measured. ·Read the value from display. Warning a) To avoid harms to you or damages to the Meter from eletric shock, do not attempt to measure voltages higher than DC 1000V or AC 750Vrms, although readings may be obtained.
Page 14: Ac Voltage Measurement
AC Voltage Measurement （see Figure 4） To measure AC voltage, connect the Meter as follows: ·Set the rotary switch to position ·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.
Page 15: Dc/Ac Current Measurement
Figure 4 DC/AC current Measurement （see Figure 5） To measure DC/AC current, connect the Meter as follows: ·Set the rotary switch to desired μA , mA or A position. ·Connect the RED test lead into “μAmA” or “10A” input terminal and BLACK test lead into “COM” input terminal. ·Press Yellow button (function select) to select DCA or ACA measuring mode.
Page 16 a) If magnitude of the current is unknown, always start with the highest range and reduce until satisfactory reading is obtained. b) If “OL” or “-OL” is shown on the LCD, it means the Meter is overloaded, then set the measuring range to higher.
Page 17: Resistance Measurement
Figure 5 Resistance Measurement （see Figure 6） Warning To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before measuring resistance. To measure resistance, connect the Meter as follows: ·Set the rotary switch to range ·Connect the RED test lead into “VΩ”...
Page 18 mode. · Connect the test leads across with the object being measured. ·Read the value from display. Warning a) Do not apply any voltage to the input when the Meter is working in resistance measuring mode. b) If resistance of the circuit or resistor be measured is open or higher than the range be selected the display will show “OL”.
Page 19 Figure 6 Diode Test （see Figure 7） 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. To do diode test, connect the Meter as follows: ·Set the rotary switch to range ·...
Page 20 measuring mode. ·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.
Page 21: Continuity Test
Figure 7 Continuity Test （see Figure 8） Warning To avoid damages to the Meter or to the devices under test, disconnect circuit power and discharge all the high-voltage capacitors before doing continuity test in circuit. To do continuity test, connect the Meter as follows:...
Page 22 ·Set the rotary switch to range · Press Yellow button (function select) to select measuring mode. ·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.
Page 23: Capacitance Measurement
· Press REL button to enter REL mode and connect the test leads across with the capacitor being measureded. （KJ2815B has no REL function, the test lead capacitance may be measured by opening the leads and recording it down, then subtracting it from the measuring result to obtain a more accurate final result）.The positive and...
Page 24 will show “OL”. c) It is normal for taking a little more time to get the steady reading when you do the capacitance measurement greater than 10uF, for example, 100uF will take approx. 15 seconds to obtain the steady reading. d) When measuring the low capacitance, it should be performed using extremely short leads in order to avoid introducing any stray capacitance.
Page 25: Frequency / Duty Cycle Measurement
Frequency / Duty cycle Measurement To measure frequency voltage, connect the Meter as follows: ·Set the rotary switch to desired ACV or ACA range ·Connect the RED test lead into “VΩ” input terminal and BLACK test lead into “COM” input terminal. ·...
Page 26 disconnect the connection between the testing leads and the circuit under test and remove testing leads from the input terminals. Temperature Measurement (KJ2817B only) To measure temperature, connect the Meter as follows: ·Set the rotary switch to range and the display is ambient °C temperature ·Connect the RED lead and BLACK lead of temperature...
Page 27: Auto Power Off
When operating HOLD, REL(KJ2817B only), RANGE, Hz% (KJ2817B only) and Yellow (function select) button, the Meter beeps. At continuity test mode, when the resistance less than 70Ω, the Meter will beep continuously. Auto Power-off If no any operating of function button or rotary switch in minutes, the Meter will enter sleep mode and it has a little power consumption and the display is blank during it sleep.
Page 28: Accurate Specifications
· Power: 9V Battery (6F22 or equivalent) 1 pieces · Operating temperature: 0～40℃（32℉～104℉） · Storage temperature:（-10～50℃）（14℉～122℉） · Humidity: 0℃～30℃ ≤75%RH 30℃～40℃≤50%RH · Dimensions (L x W x D) : 175mm x 83mm x 48mm · Weight: Approx. 300g (include battery) Accurate Specifications Accuracy：±（a%reading+b digits），guarantee for 1 year.
Page 29 400mV 0.1mV ±(1.2%+5) ±(1%+3) 10mV 400V 100mV 1000V ±(1.2%+1) Input impedance：10MΩ approx. Overload protection:：1000V DC or 750V AC rms Frequency response ： 50Hz ～ 400Hz （ not specified for ≥400Hz） Display：effective value of sine wave (mean value response) DC Current Range Resolution Accuracy...
Page 30 15 minutes. AC Current Range Resolution Accuracy 400μA 0.1μA ±(1.5%+3) 4000μA 1μA 40mA 0.01 mA ±(2%+5) 400mA 0.1mA 0.001A ±(2.5%+5) 0.01A ±(2.5%+5) Frequency response：50Hz～400Hz μA mA range：Self-healing fuse 10A range: F 10A/250V Display：effective value of sine wave (mean value response) Warning When the measured current is more than 10A, the continuous measurement time is 10 seconds maximum...
Page 31 40KΩ 10Ω 400KΩ 100Ω 4MΩ 1KΩ ±(1.2%+2) 40MΩ 10KΩ ±(1.5%+2) Overload protection：250Vp Open voltage：approx. 0.45V Capacitance (KJ2815B has no REL function) Range Resolution Accuracy 50nF 10pF 在 REL 状态时：±（3%+10） 500nF 100pF ±(3%+5) 5μF 1 nF 50μF 10 nF 100μF 100 nF ±(4%+5)
Page 32: Maintenance
Range Resolution Accuracy -40℃～0℃：±(3%+4) ℃～ 1℃ 0℃～400℃：±(1%+3) 1000℃ 400℃～1000℃：±(2%+10) Overload protection：Self-healing fuse Diode & Continuity test Overload Range Resolution Remark Protection Open voltage:1.48V approx. normal 250Vp forward voltage of junction 0.5V 0.8V ～ approx. Open voltage:0.45V approx. 0.1Ω 250Vp buzzer sounds if 400.0Ω...
Page 33: General Service
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 detergent.
Page 34 · Turn the Meter’s top case face down. · Remove the three screws one the bottom case and remove it. · Remove the old battery. · Replace the battery with 1pcs of new 9V battery (6F22 or equivalent). · Reinstall the bottom case. - End - *** This operating manual subject to change without notice.

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Kj2817b