Page 2
I. INTRODUCTION The instrument is a stable and highly reliable 3 5/6-digit multi-meter, it uses the LCD with 33mm high figure to make the reading clear, the display intuitive and the operation convenient. The instrument can measure DC and AC voltage, DC and AC current, Resistance, Capacitance, Temperature, Frequency, Duty Circle, Electromagnetic induction, Live wire judgment, Transistor, Diode and Continuity test.
testing point. 4. Select correct function and range, beware of wrong operation. Please still be careful although the meter got a function of full range protection. 5. Do not operate the meter if the battery and back cover is not fixed. 6.
V. SPECIFICATIONS Display mode: LCD display. Max. indication: 5999(3 5/6 bits), auto polarity indication Simulated bar 30 times/second, 61 segments of simulated bar graph display. Measuring method: Dual integral A/D conversion Sampling rate: Approx. 3times/second Over range indication: “OL” displays. Low battery: The “...
1. LCD display 2. Function knob 3. Measuring input terminal 4.. Measurement of maximum/minimum values 5. Function /Duty Cycle 6. Data hold/ backlight 7. Automatic/manual range 8. Select button 9. USB communication/relative value measurement 10. Screws for fixing the battery box. 11.
Diode/on-off ⑧ Low battery ⑨ Manual measurement ⑩ Auto power-off ○ Auto range ○ Duty cycle, transistor ○ High pressure, Celsius, Fahrenheit ○ Voltage,current,capacitance ○ Ohms/kiloohms/megaohms/frequency ○ Simulate progress bar ○ VIII. KEY Function 1. HOLD: Keep the reading, press this button to display that the value is locked, and then press this button again to unlock the status.
Page 7
electromagnetic induction and live wire detection tests in the electromagnetic induction and live wire detection modes. 4. MAX/MIN: Maximum and minimum value testing. Short press this function to enter MAX mode, which maintains the maximum measured value. Press this button again to enter MIN mode, which maintains the minimum value. After entering MAX/MIN mode, the display will maintain the maximum or minimum value.
Page 8
IX. MEASUREMENT OPERATION INSTRUCTIONS First please pay attention to check the battery, put the knob in the desired measurement position, if it is with low battery, the LCD display will appear " " symbol. Note the symbol " " next to the test lead jack which warns you to pay attention to the test voltage and current, do not exceed the indicated value.
Page 9
and 10A respectively. 2-2. Turn the knob to the current position, and the starting state of the instrument is DC current mode. Press the "SELECT" button to select the AC current measurement method. When measuring AC current, short press the Hz/DUTY key to perform accompanying frequency or duty cycle testing.
Page 10
3-3. Press the "RANGE" button to select the manual range operation mode. 3-4. If the display shows "OL", it indicates that the current range has been exceeded. Please select a higher range to complete. Attention: (1) When measuring resistance, all power sources in the tested circuit must be turned off first, and all capacitors must be fully discharged.
Page 11
(3) After completing the measurement, immediately disconnect the probe from the measured circuit. 5. Capacitance Measurement 5-1. Turn the knob to the capacitor position and insert the red and black probe wires into the "VΩHz" and "COM" input terminals respectively. 5-2.
Page 12
the "Hz/DUTY" button again to enter duty cycle measurement, and press the "Hz/DUTY" button a third time to return to the original measurement state. Attention: (1) Do not input signals higher than 60V, otherwise it may damage the instrument and endanger personal safety. (2) After completing all measurements, immediately disconnect the probe from the measured circuit.
Page 13
accuracy of the measurement cannot be guaranteed. (3) It is strictly prohibited to input voltage in the temperature range, otherwise there is a risk of damaging the instrument! 9. Non-contact voltage induction measurement (NCV) 9-1.Turn the knob to “NCV/Live” position, which defaults to the NCV function and corresponds to the LCD display of EF.
Page 14
is no change, the tested point is a zero wire or not powered on. 11. Automatic power on/off After the instrument is stopped for 15 minutes, it will automatically shut down (power off) and enter a sleep (power off) state. One minute before the power off, the built-in buzzer will sound 5 prompts.
Page 15
600mV 0.1mV 0.001V ±(0.5%+4d) 1000V DC / 750V 0.01V About 10MΩ AC RMS 600V 0.1V ±(1.0%+6d) 1000V 2. AC Voltage (True RMS measurement) Input Overload Resolution Range Accuracy impedance protection 0.001V ±(0.8%+10d) 0.01V About 1000V DC / 600V 0.1V 10MΩ 750AC RMS ±(1.0%+10d) 750V...
Page 16
4. AC Current (True RMS) Overload Range Accuracy Resolution protection 600uA 0.1uA 6000uA FUSE ±(1.5%+10d) 60mA 0.01mA 0.6A/250V 600mA 0.1mA 0.001A FUSE ±(2.0%+15d) 0.01A 10A/250V Maximum input current :10A(no more than 15 seconds); Accuracy is 5% to 100% of the range Frequency response: Sinusoidal and triangular waves 40Hz~1kHz;...
Page 17
60uF 0.01uF 600uF 0.1uF ±(5.0%+10d) 0.001mF 60mF 0.01mF 99.9mF referenced 0.1mF Measuring range of accuracy: 10% - 100% of the range Large capacitance response time: ≥1uF about 8s Measurement error does not include lead distribution capacitance. 7. Frequency / Duty Cycle Range Accuracy Resolution...
Page 18
The buzzer makes a long sound, and the Open circuit voltage: resistance value of the approx. 1V test two points is about 50Ω Warning: Do not input voltage at this range. Overload protection: 250V DC/AC RMS 9. Transistor testing display range test condition range...
battery cover. 5. Battery specifications:4 * 1.5V AAA alkaline batteries 6. Fuse specifications: mA input fuse "FS1": φ5 x 20mm 600mA 250V 10A input fuse "FS2": φ5 x 20mm 10A 250V Note: When the low voltage " " symbol displays on the LCD, the battery should be replaced immediately, otherwise the measuring accuracy will be affected.
XIII. Trouble Shooting If your meter is not working properly, the following methods can help you Quick resolution of a - general problem. If the fault still cannot be removed, please contact the repair center or dealer. Fault phenomenon Check the site and method Not display ■Power not connected ■Keep switch ■Change battery...
Need help?
Do you have a question about the MT-1820N and is the answer not in the manual?
Questions and answers