ThermoWorks IR-PRO Operating Instructions Download Page 4

Backlight

Laser

Storage & Cleaning

Specifications

Troubleshooting

The thermometer should be stored at room temperature. The sensor lens is the most delicate part of the thermometer. 
The lens should be kept clean at all times; care should be taken when cleaning the lens using only a soft cloth or cotton 
swab with water or medical alcohol, allowing the lens to fully dry before using the thermometer. Do not submerge any 
part of the thermometer.

When the ‘Low Battery’ icon flashes, the batteries should be replaced immediately with 2x AAA, 1.5V batteries. 

Please note: Turn the instrument off before replacing the batteries.

Dispose of used batteries promptly and keep away from children.

Range

Type K Thermocouple Range 

Operating Range 

Accuracy* (Tamb=25°C) 

Accuracy* (Tamb=23±3°C)

Thermocouple Accuracy 

Emissivity Range 

Resolution 

Response Time (90%) 

Distance/Target Spot Ratio 

Battery Life 

Dimensions 

Weight

–76 to 1832°F (–60 to 1000°C) 
–83.2 to 1999°F (–64 to 1400°C) 
32 to 122°F (0 to 50°C) 
59 to 95°F ±1.8°F (15 to 35°C ±1.0°C) 
32 to 1832°F: ±1.5% of reading or 2.7°F (1.5°C), whichever is greater 
±1% of reading or 1.8°F (1°C) whichever is greater (Test under Tamb=23±6°C)  
0.95 default — adjustable 0.1 to 1 step .01
0.1° at -83.2 to 999.9°, otherwise 1°
1 sec.
50:1
Typical 140 hours continuous use (Alkaline, without Laser and Backlight)
1.8 x 7.7 x 8.0 inches (47.0 x 197.0 x 203.3 mm)
13.62 oz. (386.1g) including batteries (AAA x 2)

EMC/RFI: Readings may affected if the unit is operated within the radio frequency electromagnetic field strength of 

approximately 3 volts per meter, but the performance of the instrument will not be permanently affected.

*IR accuracy can be affected by the emissivity setting, target spot size and rapid changes in ambient temperature.

The thermometer incorporates visual diagnostic messages as follows:

‘Hi’ or ‘Lo’ is displayed when the temperature being measured is outside of the settings of 
HAL and LAL.

Er2’ is displayed when the thermometer is exposed to rapid changes in the ambient (working 

/ room) temperature. ‘Er3’ is displayed when the ambient temperature exceeds 32°F (0°C) 

or 122°F (50°C). The thermometer should always be allowed plenty of time (minimum of 30 
minutes) to stabilize to the ambient temperature.

Error 5-9 is displayed for all other error messages; it is necessary to reset the thermometer. 

To reset the thermometer, turn it off and remove the batteries for at least one minute. Reinsert 
the batteries and turn on. If the error message remains, please contact Technical Support at 
[email protected] for further assistance. ‘Hi’ or ‘Lo’ is displayed when the 
temperature being measured is outside of the measurement range.

Battery Low’ Replace batteries. Measurements are not affected

Replace batteries

To turn on the LCD backlight, press the “Lock” button while holding down the trigger. Press again to turn the backlight off. 

To turn on the dual laser, press the “C/F” button while holding down the trigger. Press again to turn the laser off. 

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