Autojack Handheld Infrared Digital Thermometer Temperature Gun - DT690

The emissivity setting is crucial for accurate readings. Consult the product manual for specific emissivity values or instructions on how to adjust it for different materials. Default settings may vary.

No, this is a surface thermometer. It measures the temperature of the surface it is pointed at, not the ambient temperature inside an oven or enclosed space.

The D:S ratio indicates how far away you can be from your target and still get an accurate reading. A common ratio is 12:1, meaning at 12 inches away, the measurement spot is 1 inch in diameter. Check the product specifications for the exact ratio of the DT690.

Use a soft, lint-free cloth, slightly dampened with water or a lens cleaning solution. Gently wipe the lens to remove dust or smudges. Avoid scratching the lens.

The Autojack DT690 typically uses standard AA or AAA batteries. Please refer to the device's manual for the exact battery type required.

This device is designed for industrial and general surface temperature measurements. It is not calibrated or intended for medical use to measure human body temperature.

Ensure batteries are correctly installed and have sufficient charge. Check battery contacts for corrosion.

Verify the distance-to-spot ratio is appropriate for the target size. Adjust emissivity setting if applicable. Ensure the target surface is not reflective or too far away. Clean the lens.

Check battery levels. Ensure the laser is not obstructed. If the problem persists, contact customer support.