Major tech MT691 Instruction Manual
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Major tech MT691 Instruction Manual

Infrared thermometer with dual laser
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INSTRUCTION MANUAL
MT691
Infrared Thermometer with
Dual Laser

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Summary of Contents for Major tech MT691

  • Page 1 INSTRUCTION MANUAL MT691 Infrared Thermometer with Dual Laser...
  • Page 3 Index Page no...
  • Page 4 1. Introduction Ÿ Thank you for purchasing the MT691 IR Thermometer. This instrument is capable of non-contact (Infrared) temperature measurements at the touch of a button. The built-in laser pointer increases target accuracy while the backlight LCD and handy push-buttons combine for convenient, ergonomic operation.
  • Page 5 3. Wide Range Application Food preparation. Safety and Fire inspectors. Plastic molding, Asphalt. Marine and Screen printing, measure ink and Dryer temperature, HVAC/R, Electrical, Diesel and, Fleet maintenance. Safety Ÿ Use extreme caution when the laser beam is turned on. •...

  • Page 6: Specifications

    6. Specifications Temperature Range -50 to 650°C (-58°F ~ 1202°F) 12:1 Display Resolution 0.1 °C (0.1 °F) <1000 1°F >1000 Accuracy for targets Assumes ambient operating temperature of 23 to 25°C (73 to 77°F) -50 - 20°C (-58°F - 68°F) ±3.5°C (6.3°F) 20°C -300°C (68°F-572°F) ±1.0% ±1.0°C (1.8°F)
  • Page 7 7. Front Panel Description 1 - DIR sensor 2 - LCD Display 3 - up button 4 - down button 5 - mode button 6 - Measurement Trigger 7 - Handle Grip 8 - Battery Cover 7-1. Indicator 1 - Scan symbol 2 - Data hold 3 - Laser "on"...

  • Page 8: Functional Design

    7-2. Buttons 1 - Up button (for EMS, HAL, LAL) 2 - Down button (for EMS, HAL, LAL) 3 - MODE button (for cycling through the mode loop) 8. Functional Design 1 - Press the up and down keys to adjust the Emissivity. 2 - Press the up key to turn the laser on or off and the down key to turn the backlight on or off.
  • Page 9 9. MODE Button Function Pressing the mode button also allows you to access the set state, Emissivity(EMS), °C/F, HAL on/off, HAL adjustment, LAL on/off, LAL adjustment. Each time you press the set key you advance through the mode cycle. The diagram shows the sequence of functions in the mode cycle.

  • Page 10: Measurement Operation

    10. Measurement Operation 1. Hold the meter by its Handle Grip and point it toward the surface needing to be measured. 2. Pull and hold the Trigger to turn the meter on and begin testing. The display will light up if the battery is good. Replace the battery if the display does not light up.
  • Page 11 12. Notes Ÿ How it Works Infrared thermometers measure the surface temperature of an object. The unit's optics sense emitted, reflected, and transmitted energy, which is collected and focused onto a detector. The unit's electronics translate the information into a temperature reading, which is displayed on the unit.

  • Page 12: Emissivity Values

    13. Emissivity Values Substance Thermal Emissivity Asphalt 0.90 to 0.98 Concrete 0.94 Cement 0.96 Sand 0.90 Earth 0.92 to 0.96 Water 0.92 to 0.96 0.96 to 0.98 Snow 0.83 Glass 0.90 to 0.95 Ceramic 0.90 to 0.94 Marble 0.94 Plaster 0.80 to 0.

  • Page 13: Maintenance

    14. Maintenance Ÿ Repairs or service are not covered in this manual and should only be carried out by a qualified technician. • Periodically, wipe the body with a dry cloth. Do not use abrasives or solvents on this instrument. •...
  • Page 16 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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