Major tech MT975 Instruction Manual
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Major tech MT975 Instruction Manual

Sound level meter
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INSTRUCTION MANUAL
MT975
SOUND LEVEL METER

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Summary of Contents for Major tech MT975

  • Page 1 INSTRUCTION MANUAL MT975 SOUND LEVEL METER...

  • Page 3: Table Of Contents

    Page no Contents 1. Safety Information................4 2. Description and Features..............4 3. Name and Functions ................4 4. Calibration Procedures..............8 5. Measurement Preparation..............9 6. Operating Procedure................9 7. Notice ................... 9 8. Software Installation..............10 9. USB Drive Installation..............10 10. Specifications ................11...

  • Page 4: Safety Information

    The MT975 features A and C level Weighting for checking in compliance with Safety Regulations IEC61672-1 Class 2.
  • Page 5 1 - Wind absorber 2 - LCD: Symbol Function 4 digits Maximum hold Minimum hold OVER Over range UNDER Under range FAST Fast response SLOW Slow response A-Weighting (response to human sense) C-Weighting (response to machine monitor) 30-130 Range indicate Recording data into computer AUTO Auto level range selection...
  • Page 6 4 - SETUP button 4.1. The Time Chip Adjustment Press 'SETUP' button and switch the power on. When the meter displays the 'TIME' symbol select the 'SETUP' function. The meter will be in time adjustment mode. The display will show the date as follows: Select the 'SETUP' button for a second time;...
  • Page 7 Press 'LEVEL' to change the adjustment. Press 'HOLD' to save the setup; Press the 'SETUP' button for a seventh time, the "time" adjustment mode will be displayed: Press 'HOLD' to save the setup. The time and date will return to the factory setup once the battery is flat or has to be replaced.

  • Page 8: Calibration Procedures

    9 - Frequency weighting select button A: A-Weighting C: C-Weighting 10 - HOLD button: Press "HOLD" button, The hold function freezes the reading in the display. 11 - Power button: Turn the meter power ON/OFF 12 - External DC 9V power supply terminal 1 x DC 9V battery Aperture size: external diameter: 3.5mm internal diameter: 1.35mm...

  • Page 9: Measurement Preparation

    Level range: 50 ~ 100dB 2. Insert the microphone housing carefully into the 1/2 inch insertion hole of the calibrator (94dB@ 1kHZ) . 3. Turn on the calibrator switch and adjust the CALL potentiometer of the unit when 94.0dB is displayed. NOTE: All products are well calibrated before shipment.

  • Page 10: Software Installation

    to avoid battery liquid leakage and damage to the instrument. 3. When using the instrument in the presence of wind, it's essential to mount the wind absorber to avoid undesirable signals. 4. Keep the microphone dry and avoid severe vibration. 8.

  • Page 11: Specifications

    10. SPECIFICATIONS Function Range Standard Applied IEC61672 -1 CLASS2 Accuracy ±1.4dB Frequency Range 31.5Hz to 8KHz Dynamic Range 50dB Memory 32 700 readings Level Ranges Low: 30d8 to 80dB Med: 50dB to 100dB HI: 80dB to 130dB Auto:30dB to 130dB Frequency Weighting Time Weighting FAST (125ms ), SLOW (1s)
  • Page 12 MAJOR TECH (PTY) LTD South Africa Australia www.major-tech.com www.majortech.com.au sales@major-tech.com info@majortech.com.au...

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