A. IntroductionThis product isa battery-powered, true-rms, auto-ranging digital multimeter with a 19999 LCD display and a backlight.B. Safety InformationTo avoid possible electrical shock, fire, or personal injury, please read all safety information before you use the product.(1)DoNOTexceed the “maximum value” indicated in the Specification.(2)Examine the connection of the test leads and the insulation of the product before measuring voltage higher than 36V DC or 25V AC.(3)Disconnect the test leads from the circuit before changing the mode。(4)Misuse of mode or range can lead to hazards, be cautious. “OL” will be shown on the display when the input is out of range.(5)Safety symbols:C. Specifications
User Manual
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D. Instruction(1)Front Panel（see the picture on the right）1. LCD display2. buttons2a.SELECT: To toggle between different testing modes (functions), press this button.2b.HOLD/Backlight: To hold the current reading, press this button and you will see “HOLD” on the display; press again to cancel. To turn on the backlight, press this button for more than 2 seconds; long-press again to turn off.3. Rotary Switch: To change mode or range。(from OFF, clockwise)3a. OFF3b. AC Voltage (V)3c.DC Voltage (V)3d. ACVoltage(mV)/ DC Voltage(mV)/Temperature3e.Resistance/Continuity/Diode/Capacitance3f.Frequency/Duty Cycle3g.AC/DC Current (A)3h. AC/DC Current (mA)3i. AC/DC Current (μA)3j.NCV
4. 20A: Input terminal for current (V) measurements.5. mA/μA: Input terminal for current (mA andμA) measurements.6. COM: Common terminal for all measurements.7. VHz: Input terminal for voltage, frequency, duty cycle, resistance, continuity,diode, capacitance, and temperature measurements.8. RANGE: press this button to enter the manual range; each push increases therange; when the highest range is reached, next push will go back to the lowestrange; to exit the manual range mode, press the button for 2 seconds.9. REL: the product allows relative measurements for the Modes of Voltage, Current,and Capacitance; press this button to enter the relative measurements mode;press again to exit.10. MAX/MIN: press the button once to measure the MAX Value; press twice tomeasure the MIN Value; to exit the mode, press the button for 2 seconds.11. Hz%: press this button when you measure AC Voltage or AC Current to measuretheir frequency/duty cycle.
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(9) Measure Temperature1. Connect the black thermocouple probe to the COM Terminal and connect thered thermocouple probe to the VHz Terminal;2. Turn the rotary switch to the Temperature Mode, and the display will show theroom temperature, to toggle between ℃/℉, press SELECT button;3. Touch the probes to the desired test points;4. Read the measured temperature on the display.*Caution:a. Do not input voltage at the Temperature Mode.(10) Test NCV1.Turn the rotary switch to the NCV Mode;2. Hold the product and move it around, the built-in beeper will beep when the innersensor detects AC voltage nearby. The stronger the voltage is, the quicker thebeeper beeps.(11) Auto Power Off1. The product automatically powers off after 15 minutes of inactivity;2. The built-in beeper beeps 5 times 1 minute before power off;3. To restart the product, press SELECT button;4. To disable the Auto Power Off function, hold down the SELECT button whenturning on the product, you will hear five beeps if you have successfullydisabled the function.E. Genearl MaintenanceBeyond replacing batteries and fuses, do not attempt to repair or service the product unless you are qualified to do so and have the relevant calibration, performance test, and service instructions.(1) Do not operate the product around hot, wet, flammable, explosive or magneticenvironments.(2) Clean the product with damp cloth and mild detergent; do not use abrasives orsolvents.(3) Remove the input signals before you clean the product.(4) Remove the batteries if you will not use the product for a long time to preventpossible battery leak.(5) When “ ” is shown on the display, batteries shall be replaced as below:1. Loosen the screw and remove the battery cover;2. Replace the used batteries with new batteries of the same type;3. Place the battery cover back and fasten the screw.(6) Replace fuses as above steps. Use only fuses of the same type as the originalones.
Warning：1.DoNOTexceed the “maximum value” indicated in the Specification;2. Do NOT input voltage at the Current Mode, the Resistance Mode, the DiodeMode, the Continuity Mode, or the Temperature Mode;3. Do NOT use the product when the batteries or the battery cover is not placedproperly;4. Turn off the product and remove the test leads from the test points beforechanging batteries or fuses.
F. TroubleshootingIf your product do not function as normal, the following steps may help you. If the problem still cannot be solved, please contact your dealer.
LIMITED WARRANTYAND LIMITATION OF LIABILITYCustomers enjoy one-year warranty from the date of purchase. This warranty does not cover fuses, disposable batteries, or damage from accident, neglect, misuse, alternation, contamination, or abnormal conditions of operation or handling.All rights reserved. Specifications are subject to change without notice.
Do not input voltage exceeds 36V DC or 25V AC when you are at the setting of measuring current.
(2)Measure AC/DC Voltage1. Connect the black test lead to the COM Terminal and connect the red test lead tothe VHz Terminal;2. Turn the rotary switch to the AC Voltage (V) Mode, the DC Voltage (V) Mode, orthe Voltage (mV) Mode;3. Press SELECT to toggle between AC/DC;4. Touch the probes to the correct test points of the circuit to measure the voltage;5. Read the measured voltage on the display.*Caution:a. Do not measure voltage that exceeds the MAX Value as indicated in theSpecifications;b. Do not touch high voltage circuit during measurements.(3)Measure AC/DC Current1. Connect the black test lead to the COM Terminal and connect the red test leadto the 20A Terminal or the mA/μA Terminal (choose based on the value ofcurrent) ;2. Turn the rotary switch to the AC/DC Current (A) Mode, the AC/DC Current (mA)Mode, or the AC/DC Current (μA) Mode;3. Press SELECT to toggle between AC/DC;4. Break the circuit path to be measured. Then connect the test leads across thebreak and apply power;5. Read the measured current on the display.*Caution:a. Do not measure current that exceeds the MAX Value as indicated in theSpecifications;b. Use the 20A Terminal and the Current-A Mode when you are measuring anunknown current. Then switch to the mA/μA Terminal and the smaller CurrentMode if necessary.(4) Measure Resistance1. Connect the black test lead to the COM Terminal and connect the red test lead tothe VHz Terminal;2. Turn the rotary switch to the Resistance Mode, and the display will show “OL”;3. Touch the probes to the desired test points of the circuit to measure the resistance;4. Read the measured resistance on the display.*Caution:a. Disconnect circuit power and discharge all capacitors before you test resistance.b. Do not input voltage at the Resistance Mode.
(5) Measure Continuity1. Connect the black test lead to the COM Terminal and connect the red test lead tothe VHz Terminal;2. Turn the rotary switch to the Resistance Mode, press SELECT once to toggle to theContinuity Mode;3. Touch the probes to the desired test points of the circuit;4. The built-in beeper will beep when the resistance is lower than 50Ω, whichindicates a short circuit.*Caution:a. Do not input voltage at the Continuity Mode.(6) Measure Diode1. Connect the black test lead to the COM Terminal and connect the red test lead tothe VHz Terminal;2. Turn the rotary switch to the Resistance Mode, press SELECT twice to toggle to theDiode Mode;3. Connect the red probe to the anode side and the black probe to the cathode sideof the diode being tested;4. Read the forward bias voltage value on the display;5. If the polarity of the test leads is reversed with diode polarity or the diode isbroken, the display reading shows “OL”.*Caution:a. Do not input voltage at the Diode Mode.b. Disconnect circuit power and discharge all capacitors before you test diode.(7) Measure Capacitance1. Connect the black test lead to the COM Terminal and connect the red test lead tothe VHz Terminal;2.Turn the rotary switch to the Resistance Mode, press SELECT three times to toggleto the Capacitance Mode;3. Connect the red probe to the anode side and the black probe to the cathodeside of the capacitor being tested;4. Read the measured capacitance value on the display once the reading is stablized.*Caution:a. Disconnect circuit power and discharge all capacitors before you test capacitance.(8) Measure Frequency and Duty Cycle1. Connect the black test lead to the COM Terminal and connect the red test lead tothe VHz Terminal;2. Turn the rotary switch to the ACVoltage(V)Mode; press RANGE to toggle to the Frequency Mode(with high voltage), press RANGE again to measure duty cycle;or turn the rotary switch to theFrequency Mode (with low voltage),press to toggle to the Duty Cycle Mode;3. Touch the probes to the desired test points of the circuit;4. Read the measured frequency/duty cycle value on the display.*Caution:a. The Frequency Mode only applies to measure high frequency with low voltage.
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