BENETECH GT750 Infrared Thermometer Data Logger User Manual

1. Introduction

This manual provides instructions for the safe and effective operation of the BENETECH GT750 Infrared Thermometer Data Logger. This device is designed for non-contact temperature measurement in various applications, offering features such as data storage, high/low temperature alarms, and multiple measurement modes. Please read this manual thoroughly before using the device.

2. Important Safety Precautions

• Do not point the laser directly at eyes or indirectly off reflective surfaces. Direct exposure to the laser beam can cause eye damage.
• Do not use the device near explosive gas, vapor, or dust. This can create a risk of explosion.
• Do not immerse the unit in water or expose it to excessive moisture. The device is not waterproof.
• Avoid exposing the device to extreme temperatures or humidity. Store it in a dry, cool environment.
• This device is not intended for medical use or for measuring human body temperature. It is designed for industrial and scientific applications.
• Keep the device out of reach of children.

3. Product Overview

Familiarize yourself with the main parts and controls of your GT750 infrared thermometer for optimal use.

This image displays the various components and controls of the BENETECH GT750 Infrared Thermometer, with each part clearly numbered for identification.

1. Positioning laser
2. Temperature Sensor
3. Data hold icon
4. Scanning icon
5. Battery power icon
6. Back light on icon
7. Laser on icon
8. Measuring unit
9. High temperature alarm icon
10. Low temperature alarm icon
11. Data storage / Read icon
12. Mode/emissivity indicator
13. Measuring reading
14. Trigger
15. Battery door
16. Select key
17. Store/clear data key
18. Laser point switch
19. Down key
20. Mode key
21. Up key

4. Setup

Battery Installation

The GT750 requires a 9V Alkaline or NiCd battery for operation. A low battery indicator (part 5) will appear on the display when the battery needs replacement.

1. Locate the battery door (part 15) on the handle of the device.
2. Open the battery door by sliding or unlatching it.
3. Insert a new 9V battery, ensuring correct polarity (+ and - terminals).
4. Close the battery door securely until it clicks into place.

5. Operating Instructions

Basic Measurement

To take a temperature reading:

1. Point the thermometer at the target surface. Ensure the target is within the device's field of view.
2. Press and hold the Trigger (part 14). The scanning icon (part 4) will appear on the display, indicating an active measurement.
3. The measured temperature will be displayed on the LCD (part 13).
4. Release the Trigger to hold the reading. The data hold icon (part 3) will appear, and the last measured temperature will remain on the display.

Distance to Spot Ratio (D:S)

The GT750 has a Distance to Spot (D:S) ratio of 12:1. This means that at a distance of 12 units from the target, the measurement spot diameter is 1 unit. For accurate readings, ensure the target area is larger than the spot size. Measuring too far from a small object can lead to inaccurate results as the thermometer will average the temperature of the target and its surroundings.

This image illustrates the 12:1 Distance to Spot Ratio, showing how the measurement area expands with distance from the target. It also depicts the MAX, MIN, DIF, and AVG measurement modes.

Mode Selection (MAX/MIN/DIF/AVG)

Press the "MODE" key (part 20) repeatedly to cycle through different measurement modes:

• MAX: Displays the maximum temperature recorded during a continuous scan.
• MIN: Displays the minimum temperature recorded during a continuous scan.
• DIF: Calculates and displays the difference between the maximum and minimum temperatures recorded during a scan.
• AVG: Displays the average temperature recorded during a continuous scan.

Emissivity Adjustment

Emissivity (EMS) is a measure of a material's ability to emit thermal energy. Different materials have different emissivities. The GT750 allows adjustment from 0.10 to 1.00 (preset to 0.95) to improve measurement accuracy for various surfaces.

1. In measurement mode, press the "MODE" key until "EMS" is displayed (part 12).
2. Use the "Up" (part 21) and "Down" (part 19) keys to adjust the emissivity value. Refer to common emissivity tables for different materials if needed.
3. Press "MODE" again to confirm the setting and exit the emissivity adjustment.

High/Low Temperature Alarm

The device can be set to alert you when measured temperatures exceed a high threshold (HAL) or fall below a low threshold (LAL).

This image illustrates the high and low temperature alarm functions, showing the display indicators (HAL/LAL) and an audible alert symbol.

1. Press the "SET" key (part 16) to enter alarm setting mode.
2. Use the "Up" (part 21) and "Down" (part 19) keys to adjust the high alarm threshold (HAL).
3. Press "SET" again to switch to the low alarm threshold (LAL) and adjust it using the "Up" and "Down" keys.
4. Press "SET" again to confirm settings and exit.
5. When an alarm condition is met (temperature goes above HAL or below LAL), the corresponding icon (part 9 or 10) will flash, and an audible "BiBi" sound will activate.

Data Storage

The GT750 can store up to 30 groups of measurement data, allowing for later review.

This image demonstrates the data storage feature, showing how to save and recall up to 30 groups of temperature readings.

1. After taking a measurement and holding the reading, press the "STO/CAL" key (part 17) to store the data. The data storage icon (part 11) will appear, indicating the data has been saved to a memory group.
2. To recall stored data, press the "STO/CAL" key repeatedly to cycle through the stored groups. The display will show the group number and the stored temperature.
3. To clear stored data, press and hold the "STO/CAL" key until the display indicates that the memory has been cleared.

6. Maintenance

Cleaning

Proper cleaning ensures the longevity and accuracy of your device.

• Use a soft, damp cloth to wipe the casing of the thermometer. Do not use abrasive cleaners or solvents, as they may damage the plastic.
• For the lens (temperature sensor, part 2), use a clean, soft cloth or cotton swab with a small amount of medical alcohol. Gently wipe the lens to remove any dust or smudges. Avoid scratching the lens.

Battery Replacement

When the low battery indicator (part 5) appears on the display, replace the battery as described in the "Setup" section (Section 4).

7. Troubleshooting

Common Issues and Solutions

• No Power: If the device does not turn on, check the battery installation and ensure the battery has sufficient charge. Replace the 9V battery if necessary.
• Inaccurate Readings:
  • Ensure the correct emissivity setting is selected for the target material.
  • Verify that the Distance to Spot Ratio (D:S) is appropriate for the measurement distance and target size.
  • Clean the lens if it is dirty or smudged.
  • Ensure there are no obstructions between the thermometer and the target.
• "HIGH" or "LOW" displayed: This indicates that the measured temperature is outside the device's specified measurement range (-50℃ to 750℃).
• Laser Not Working: Check if the laser point switch (part 18) is turned on.

8. Specifications

Technical Data

This image shows the BENETECH GT750 Infrared Thermometer, highlighting its ergonomic design and digital display.

9. Warranty and Support

Product Support

For technical assistance, warranty inquiries, or any questions regarding the BENETECH GT750 Infrared Thermometer, please contact BENETECH customer support. You can typically find contact information on the official BENETECH website or through the retailer where the product was purchased. Please retain your purchase receipt as proof of purchase for warranty claims.

This product is designed for industrial and scientific applications and is not intended for medical use or for measuring human body temperature.