Major tech MT1877 Manual
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Major tech MT1877 Manual

Professional digital multimeters
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  • Page 1 ¦ ¸ ¦ ¸...
  • Page 3 SAFETY WARNINGS The following safety information must be observed to insure maximum personal safety during the operation at this meter:  Measurements beyond the maximum selected range must not be attempted.  Extreme care must be taken when measuring above 50 V, especially on live bus-bars. ...
  • Page 4  Replacement fuses must be of the correct type and rating.  The instrument must not be used if any part of it is damaged.  Warnings and precautions must be read and understood before an instrument is used. They must be observed during the operation of this instrument.
  • Page 5 Caution: risk of electric shock This WARNING symbol indicates a potentially hazardous situation, which if not avoided, could result in death or serious injury. This CAUTION symbol indicates a potentially hazardous situation, which if not avoided, may result damage to the product.

  • Page 6: Symbols And Annunciators

    SYMBOLS AND ANNUNCIATORS ))) Continuity Low Battery Diode test HOLD Data Hold AUTO Auto Ranging Alternating Current or Voltage Direct Current or Voltage Volts A, mA, uA Current range OPERATION To turn on the instrument turn the range knob from the OFF position to any measurement range.

  • Page 7: Mode Button

    the test leads not connected to a device, the display may show a random, changing reading. This is normal and is caused by the high-input sensitivity. The reading will stabilize and give a proper measurement when connected to a circuit. MODE button To select AC or DC measurement when in Voltages, , )))，...
  • Page 8 RANGE button When the meter is first turned on, it automatically goes into Auto Ranging. This automatically selects the best range for the measurements being made and is generally the best mode for most measurements. For measurement situations requiring that a range be manually selected, perform the following: 1.

  • Page 9: Dc Current Measurement

    with trigger. IN frequency measurement mode, press the key can select frequency or duty cycle measurement mode; in AC/DC Voltage or AC/DC Current mode, press the key can proceed Voltage/Frequency/Duty Cycle Current/Frequency/Duty cycle measurement mode select. HZ/Duty button DC/DC VOLTAGE MEASUREMENT 1.

  • Page 10: Ac Current Measurement

    3. For current measurements up to 400mA DC, set the function switch to the mA range and insert the red test lead banana plug into the (mA) jack. 4. For current measurements up to 10A DC, set the function switch to the A position and insert the red test lead banana plug into the 10A jack.
  • Page 11 2. For current measurements up to 10A, set the function switch to the A position and insert the red test lead plug into the (10A) jack. 3. For current measurements up to 400mA, set the function switch to the mA range and insert the red test lead banana plug into the (mA) jack.

  • Page 12: Resistance [ Ω ] Measurement

    RESISTANCE [ Ω ] MEASUREMENT WARNING: To avoid electric shock, disconnect power to the unit under test and discharge all capacitors before taking resistance measurements. Remove the batteries and unplug the line cords. 1. Set the function switch to the Ω position. 2.

  • Page 13: Continuity Check

    CONTINUITY CHECK WARNING: To avoid electric shock, never measure continuity on circuits or wires that have voltage on them. ))) 1. Set the range switch to the position. 2. Insert the black lead plug into the COM socket and ))) the red test lead plug into the positive socket.

  • Page 14: Capacitance Measurement

    and the red test lead plug into the socket. Press the MODE button until “ ” appears in the display. Touch the test probe tips to the diode or semiconductor junction you wish to test. Note the meter reading. 5. Reverse the probe polarity by switching probe position.

  • Page 15: Frequency Measurement

    display. 2. Insert the black test lead banana plug into the negative COM jack and the red test lead banana plug into the CAP positive jack. 3. Touch the test probe tips across the part under test. 4. Read the capacitance value in the display. 5.

  • Page 16: Non -Contact Voltage (Ncv)

    -CONTACT VOLTAGE (NCV) The NCV function works on any rotary switch position. 1. Test the detector on a known live circuit before use. 2. Hold the top of the meter very close to the voltage source as shown. 3. If voltage is present, the back light will flash a bright red.
  • Page 17 protect against transients from the primary supply level (overhead or underground utility service). Maximun voltage between any terminal and earth ground: 1000V DC/AC RMS Surge Protection: peak IEC 61010 Display: 4000 counts LCD display, 21mm high Polarity: Automatic, (-) negative polarity indication. “OL”...
  • Page 18 approx. 30 minutes of inactivity. Operating environment:-10 o C to 50 o C (14 o F to 122 o F) at < 70 % relative humidity. Storage temperature: -30 o C to 60 o C (-4 o F to 140 o F) at <...
  • Page 19 DC Voltage (Auto-ranging) Range Resolution Accuracy 400.0mV 0.1mV +0.8% of rdg + 2 digits 4.000V 40.00V 10mV 400.0V 100mV 1000V +1.0% of rdg + 4digits Input Impedance: 10MΩ. Maximum Input: 1000V dc or 1000V ac rms. AC Voltage (Auto-ranging) Range Resolution Accuracy 400.0mV...
  • Page 20 DC Current (Auto-ranging) Range Resolution Accuracy 400.0uA 0.1uA +1.2% of rdg + 3 digits 4000uA 40.00mA 10uA 400.0mA 100uA 10mA +2.5% of rdg + 3 digits Overload protection: FF500mA / 1000V and F10A / 1000V Fuse. Maximum Input: 400uA dc on uA range 400mA dc on mA range 10A dc on 10A range AC Current (Auto-ranging)
  • Page 21 Maximum Input: 400uA ac rms on uA 400mA ac rms on mA 10A ac rms on 10A range Resistance [Ω] (Auto-ranging) Range Resolution Accuracy 400.0Ω 0.1Ω +0.8% of rdg + 5 digits 4.000kΩ 1Ω 40.00kΩ 10Ω +0.8% of rdg + 2 digits 400.0kΩ...
  • Page 22 Frequency (Auto-ranging) Range Resolution Accuracy 4.000Hz 0.001Hz +1.0% of rdg + 3 dgts 40.00 Hz 0.01Hz 400.0 Hz 0.1Hz 4.000KHz 1 Hz 40.00kHz 10Hz 400.0kHz 100Hz 5.00MHz 1kHz +1.2% of rdg + 4 dgts Sensitivity: >0.5V RMS while ≤1MHz ; Sensitivity: >3V RMS while >1MHz;...

  • Page 23: Audible Continuity

    Diode Test Test current Resolution Accuracy 1 mV +10% of rdg + 5 typical/Open digits MAX.3V Open circuit voltage: MAX. 3V dc Overload protection: 1000V dc or ac rms. Audible continuity Audible threshold: Less than50Ω Test current MAX. 1.5mA Overload protection: 1000V dc or ac rms. Accessories Included accessories Standard Red/Black lead set with test probes...

  • Page 24: Battery Installation

    symbol will appear in the LCD display. The battery should be replaced. 2. Follow instructions for installing battery. See the Battery Installation section of this manual. 3. Dispose of the old battery properly. WARNING: To avoid electric shock, do not operate your meter with the battery cover removed.

  • Page 25: Replacing The Fuses

    NOTE: If your meter does not work properly, check the fuses and battery to make sure that they are still good and that they are properly inserted. REPLACING THE FUSES WARNING: To avoid electric shock, disconnect the test leads from any source of voltage before removing the fuse /battery cover.
  • Page 26 WARNING: To avoid electric shock, do not operate your meter until the fuse door is in place and fastened securely.

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