Sper Scientific 800103 Infrared IR Thermometer Gun 12:1 - Manual (Page 5)

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4. Distance-to-Spot
The distance-to-spot ratio is 12:1. As the distance
from the object increases, the spot size of the area
measured by the gun also increases.
193.
5
SCAN °C
HOLD °F
8
9
10
11
12
13
8. Low Battery Indicator
9. Laser Guide On/Off
10. Scan 11. °C & °F
12. Hold
13. Temperature Reading