1. Hold the thermometer and point it toward the target to be measured. Pull and hold the trigger for at least 1
second to start measuring. When the thermometer is in measurement state, the backlight and the laser are on,
and the screen shows the icon “SCAN”. When you release the trigger, the thermometer sounds 3 beeps and the
laser turns off and the last temperature reading is held on the screen. If you have not operated the thermometer
for about 15 seconds, the backlight will turn off automatically, and, If you have not operated the thermometer for
about 1 minute, the thermometer will turn off automatically.
2. When the thermometer is in measurement state ( the trigger is pulled and held ), you can press the “ ” button
to set the reference temperature, which is shown on the secondary display (the lower display).
3. When the thermometer is in ON state ( the trigger is not pulled ), you can press the “ ” button to select desired
unit: °C or °F. ( The primary display and the secondary display share the same unit. )
4. When the thermometer is in ON state ( the trigger is not pulled ), you can press and hold down the “ ” button
for about 3 seconds to turn off the thermometer.
5. You can press the “ ” button to select desired threshold (0.5°C/1°F, 3°C/5°F, or 5.5°C/10°F), the arrowhead
icon ( ) on the screen will move to the corresponding position to indicate your selection. If you want to disable
the threshold feature and turn off the leak detection, press the “ ” button until the arrowhead icon is directly
above and points to the “ OFF ” mark.
6. After you finish setting the reference temperature and threshold, during measurement, the backlight will be green
and the symbol “NORMAL” will appear on the top right corner of the screen if the difference between the
presently scanned temperature and the reference temperature does not exceed the threshold you selected. The
backlight will be blue and the symbol “LOW” will appear on the top right corner of the screen and the built-in
buzzer will sound slow beeps (about one beep per second) if the presently scanned temperature is lower than the
reference temperature by more than the threshold. The backlight will be red and the symbol “HIGH” will appear on
the top right corner of the screen and the buzzer will sound fast beeps (about two beeps per second) if the
presently scanned temperature is higher than the reference temperature by more than the threshold.
7. To find a leak:
After finishing setting the desired reference temperature and threshold, point the thermometer at the wall,
molding, ductwork or other surface, and start measuring temperature. When the position where a leak exists is
being scanned, the temperature reading is probably very different from the temperature reading of other position
where there is no leak. When the difference between the present temperature reading and the preset reference
temperature exceeds the threshold you set, the display backlight color will change and the built-in buzzer will
give an audible alarm see step 6).
8. When the ambient temperature is lower than 0°C or higher than 40°C, the primary display will show “Err” (Error).
9. When the scanned temperature is higher than the upper limit of the thermometer’s measuring range, the primary
display will show “Hi”; and when the scanned temperature is lower than the lower limit of the thermometer’s
measuring range, the primary display will show “Lo”.
OPERATING INSTRUCTION
1. Shiny or polished surfaces can give inaccurate readings. To compensate for this, cover the surface with masking
tape or flat colored paint. When the tape or paint reaches the same temperature as the target underneath,
measure the temperature of the item.
2. The thermometer cannot measure through transparent surfaces such as glass or plastic. It will measure the
surface temperature instead.
3. Steam, dust, smoke, and other optical obstructions can prevent accurate measurement.
NOTE:
4
